./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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-ext/26_stack_cas_longest-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 79f59481c49375d27b8409383d6d600e90e5ee29536655deda4d0ae0ca7faefc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 16:29:29,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:29:29,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:29:29,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:29:29,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:29:29,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:29:29,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:29:29,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:29:29,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:29:29,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:29:29,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:29:29,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:29:29,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:29:29,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:29:29,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:29:29,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:29:29,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:29:29,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:29:29,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:29:29,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:29:29,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:29:29,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:29:29,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:29:29,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:29:29,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:29:29,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:29:29,630 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:29:29,631 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:29:29,632 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:29:29,633 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:29:29,633 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:29:29,634 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:29:29,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:29:29,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:29:29,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:29:29,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:29:29,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:29:29,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:29:29,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:29:29,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:29:29,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:29:29,645 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:29:29,678 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:29:29,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:29:29,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:29:29,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:29:29,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:29:29,681 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:29:29,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:29:29,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:29:29,682 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:29:29,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:29:29,683 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:29:29,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:29:29,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:29:29,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:29:29,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:29:29,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:29:29,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:29:29,685 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:29:29,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:29:29,685 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:29:29,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:29:29,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:29:29,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:29:29,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:29:29,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:29:29,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:29:29,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:29:29,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:29:29,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:29:29,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:29:29,687 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:29:29,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:29:29,688 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:29:29,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:29:29,688 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:29:29,688 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79f59481c49375d27b8409383d6d600e90e5ee29536655deda4d0ae0ca7faefc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:29:29,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:29:30,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:29:30,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:29:30,030 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:29:30,030 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:29:30,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-08-30 16:29:31,245 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:29:31,521 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:29:31,524 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-08-30 16:29:31,542 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a98dc12d/751a0f214c3145a6bb6fa3b1dc5896ba/FLAG619759b3b [2023-08-30 16:29:31,567 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a98dc12d/751a0f214c3145a6bb6fa3b1dc5896ba [2023-08-30 16:29:31,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:29:31,570 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:29:31,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:29:31,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:29:31,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:29:31,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:29:31" (1/1) ... [2023-08-30 16:29:31,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50dd86a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:31, skipping insertion in model container [2023-08-30 16:29:31,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:29:31" (1/1) ... [2023-08-30 16:29:31,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:29:31,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:29:31,944 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-ext/26_stack_cas_longest-2.i[31164,31177] [2023-08-30 16:29:31,954 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:29:31,967 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:29:32,022 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-ext/26_stack_cas_longest-2.i[31164,31177] [2023-08-30 16:29:32,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:29:32,069 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:29:32,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:32 WrapperNode [2023-08-30 16:29:32,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:29:32,071 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:29:32,071 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:29:32,071 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:29:32,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:32" (1/1) ... [2023-08-30 16:29:32,098 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:32" (1/1) ... [2023-08-30 16:29:32,118 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 188 [2023-08-30 16:29:32,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:29:32,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:29:32,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:29:32,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:29:32,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:32" (1/1) ... [2023-08-30 16:29:32,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:32" (1/1) ... [2023-08-30 16:29:32,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:32" (1/1) ... [2023-08-30 16:29:32,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:32" (1/1) ... [2023-08-30 16:29:32,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:32" (1/1) ... [2023-08-30 16:29:32,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:32" (1/1) ... [2023-08-30 16:29:32,151 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:32" (1/1) ... [2023-08-30 16:29:32,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:32" (1/1) ... [2023-08-30 16:29:32,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:29:32,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:29:32,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:29:32,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:29:32,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:32" (1/1) ... [2023-08-30 16:29:32,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:29:32,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:29:32,194 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 16:29:32,209 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 16:29:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 16:29:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 16:29:32,231 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 16:29:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:29:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:29:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:29:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:29:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:29:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:29:32,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:29:32,235 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 16:29:32,390 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:29:32,391 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:29:32,704 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:29:32,831 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:29:32,832 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 16:29:32,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:29:32 BoogieIcfgContainer [2023-08-30 16:29:32,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:29:32,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:29:32,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:29:32,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:29:32,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:29:31" (1/3) ... [2023-08-30 16:29:32,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472535a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:29:32, skipping insertion in model container [2023-08-30 16:29:32,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:32" (2/3) ... [2023-08-30 16:29:32,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472535a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:29:32, skipping insertion in model container [2023-08-30 16:29:32,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:29:32" (3/3) ... [2023-08-30 16:29:32,842 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2023-08-30 16:29:32,848 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:29:32,856 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:29:32,856 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 16:29:32,857 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:29:32,943 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:29:32,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 16:29:33,023 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-08-30 16:29:33,029 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:29:33,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-30 16:29:33,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 16:29:33,040 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 114 transitions, 233 flow [2023-08-30 16:29:33,045 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:29:33,052 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 114 transitions, 233 flow [2023-08-30 16:29:33,054 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 114 transitions, 233 flow [2023-08-30 16:29:33,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 16:29:33,079 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-08-30 16:29:33,080 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:29:33,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-30 16:29:33,083 INFO L119 LiptonReduction]: Number of co-enabled transitions 2028 [2023-08-30 16:29:36,750 INFO L134 LiptonReduction]: Checked pairs total: 2167 [2023-08-30 16:29:36,750 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-30 16:29:36,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:29:36,764 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;@5d7cd86c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:29:36,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 16:29:36,778 INFO L130 PetriNetUnfolder]: 5/25 cut-off events. [2023-08-30 16:29:36,779 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:29:36,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:29:36,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:29:36,780 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:29:36,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:29:36,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1286972708, now seen corresponding path program 1 times [2023-08-30 16:29:36,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:29:36,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750506436] [2023-08-30 16:29:36,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:29:36,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:29:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:29:37,013 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 16:29:37,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:29:37,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750506436] [2023-08-30 16:29:37,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750506436] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:29:37,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:29:37,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:29:37,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131613992] [2023-08-30 16:29:37,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:29:37,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:29:37,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:29:37,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:29:37,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:29:37,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 218 [2023-08-30 16:29:37,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 28 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 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 16:29:37,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:29:37,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 218 [2023-08-30 16:29:37,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:29:37,140 INFO L130 PetriNetUnfolder]: 42/93 cut-off events. [2023-08-30 16:29:37,140 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:29:37,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 93 events. 42/93 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 185 event pairs, 2 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 178. Up to 83 conditions per place. [2023-08-30 16:29:37,142 INFO L137 encePairwiseOnDemand]: 212/218 looper letters, 22 selfloop transitions, 2 changer transitions 1/26 dead transitions. [2023-08-30 16:29:37,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 26 transitions, 107 flow [2023-08-30 16:29:37,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:29:37,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:29:37,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-08-30 16:29:37,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4908256880733945 [2023-08-30 16:29:37,161 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-08-30 16:29:37,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-08-30 16:29:37,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:29:37,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-08-30 16:29:37,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 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 16:29:37,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 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 16:29:37,174 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 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 16:29:37,176 INFO L175 Difference]: Start difference. First operand has 24 places, 28 transitions, 61 flow. Second operand 3 states and 321 transitions. [2023-08-30 16:29:37,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 26 transitions, 107 flow [2023-08-30 16:29:37,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:29:37,180 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 55 flow [2023-08-30 16:29:37,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-08-30 16:29:37,187 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2023-08-30 16:29:37,187 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 55 flow [2023-08-30 16:29:37,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 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 16:29:37,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:29:37,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:29:37,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:29:37,188 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:29:37,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:29:37,190 INFO L85 PathProgramCache]: Analyzing trace with hash -342307077, now seen corresponding path program 1 times [2023-08-30 16:29:37,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:29:37,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503455622] [2023-08-30 16:29:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:29:37,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:29:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:29:37,325 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 16:29:37,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:29:37,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503455622] [2023-08-30 16:29:37,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503455622] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:29:37,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:29:37,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:29:37,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523398531] [2023-08-30 16:29:37,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:29:37,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:29:37,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:29:37,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:29:37,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:29:37,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 218 [2023-08-30 16:29:37,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 55 flow. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 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 16:29:37,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:29:37,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 218 [2023-08-30 16:29:37,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:29:37,389 INFO L130 PetriNetUnfolder]: 50/113 cut-off events. [2023-08-30 16:29:37,389 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:29:37,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 113 events. 50/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 257 event pairs, 14 based on Foata normal form. 3/101 useless extension candidates. Maximal degree in co-relation 221. Up to 73 conditions per place. [2023-08-30 16:29:37,390 INFO L137 encePairwiseOnDemand]: 215/218 looper letters, 26 selfloop transitions, 2 changer transitions 1/30 dead transitions. [2023-08-30 16:29:37,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 127 flow [2023-08-30 16:29:37,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:29:37,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:29:37,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2023-08-30 16:29:37,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48623853211009177 [2023-08-30 16:29:37,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2023-08-30 16:29:37,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2023-08-30 16:29:37,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:29:37,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2023-08-30 16:29:37,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 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 16:29:37,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 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 16:29:37,396 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 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 16:29:37,396 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 55 flow. Second operand 3 states and 318 transitions. [2023-08-30 16:29:37,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 127 flow [2023-08-30 16:29:37,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 30 transitions, 123 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:29:37,398 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 63 flow [2023-08-30 16:29:37,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2023-08-30 16:29:37,399 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2023-08-30 16:29:37,399 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 63 flow [2023-08-30 16:29:37,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 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 16:29:37,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:29:37,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:29:37,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 16:29:37,400 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:29:37,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:29:37,400 INFO L85 PathProgramCache]: Analyzing trace with hash -339227072, now seen corresponding path program 1 times [2023-08-30 16:29:37,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:29:37,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949309229] [2023-08-30 16:29:37,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:29:37,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:29:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:29:37,536 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 16:29:37,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:29:37,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949309229] [2023-08-30 16:29:37,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949309229] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:29:37,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:29:37,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:29:37,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091555204] [2023-08-30 16:29:37,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:29:37,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:29:37,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:29:37,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:29:37,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:29:37,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 218 [2023-08-30 16:29:37,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 63 flow. Second operand has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 0 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 16:29:37,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:29:37,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 218 [2023-08-30 16:29:37,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:29:37,703 INFO L130 PetriNetUnfolder]: 71/161 cut-off events. [2023-08-30 16:29:37,704 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:29:37,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 161 events. 71/161 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 325 event pairs, 12 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 326. Up to 73 conditions per place. [2023-08-30 16:29:37,705 INFO L137 encePairwiseOnDemand]: 212/218 looper letters, 39 selfloop transitions, 5 changer transitions 1/46 dead transitions. [2023-08-30 16:29:37,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 46 transitions, 197 flow [2023-08-30 16:29:37,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:29:37,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:29:37,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 580 transitions. [2023-08-30 16:29:37,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434250764525994 [2023-08-30 16:29:37,710 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 580 transitions. [2023-08-30 16:29:37,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 580 transitions. [2023-08-30 16:29:37,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:29:37,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 580 transitions. [2023-08-30 16:29:37,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.66666666666667) internal successors, (580), 6 states have internal predecessors, (580), 0 states have call successors, (0), 0 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 16:29:37,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 218.0) internal successors, (1526), 7 states have internal predecessors, (1526), 0 states have call successors, (0), 0 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 16:29:37,715 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 218.0) internal successors, (1526), 7 states have internal predecessors, (1526), 0 states have call successors, (0), 0 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 16:29:37,715 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 63 flow. Second operand 6 states and 580 transitions. [2023-08-30 16:29:37,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 46 transitions, 197 flow [2023-08-30 16:29:37,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 46 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:29:37,717 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 91 flow [2023-08-30 16:29:37,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=91, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-08-30 16:29:37,718 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 8 predicate places. [2023-08-30 16:29:37,718 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 91 flow [2023-08-30 16:29:37,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 0 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 16:29:37,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:29:37,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:29:37,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 16:29:37,719 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:29:37,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:29:37,720 INFO L85 PathProgramCache]: Analyzing trace with hash 85896053, now seen corresponding path program 1 times [2023-08-30 16:29:37,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:29:37,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008729868] [2023-08-30 16:29:37,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:29:37,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:29:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:29:38,152 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 16:29:38,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:29:38,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008729868] [2023-08-30 16:29:38,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008729868] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:29:38,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:29:38,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 16:29:38,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416660670] [2023-08-30 16:29:38,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:29:38,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 16:29:38,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:29:38,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 16:29:38,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-30 16:29:38,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 218 [2023-08-30 16:29:38,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 91 flow. Second operand has 10 states, 10 states have (on average 73.6) internal successors, (736), 10 states have internal predecessors, (736), 0 states have call successors, (0), 0 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 16:29:38,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:29:38,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 218 [2023-08-30 16:29:38,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:29:38,574 INFO L130 PetriNetUnfolder]: 110/258 cut-off events. [2023-08-30 16:29:38,574 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 16:29:38,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 258 events. 110/258 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 760 event pairs, 6 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 561. Up to 88 conditions per place. [2023-08-30 16:29:38,576 INFO L137 encePairwiseOnDemand]: 206/218 looper letters, 47 selfloop transitions, 20 changer transitions 1/69 dead transitions. [2023-08-30 16:29:38,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 69 transitions, 328 flow [2023-08-30 16:29:38,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 16:29:38,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 16:29:38,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 858 transitions. [2023-08-30 16:29:38,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3577981651376147 [2023-08-30 16:29:38,581 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 858 transitions. [2023-08-30 16:29:38,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 858 transitions. [2023-08-30 16:29:38,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:29:38,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 858 transitions. [2023-08-30 16:29:38,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 78.0) internal successors, (858), 11 states have internal predecessors, (858), 0 states have call successors, (0), 0 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 16:29:38,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 218.0) internal successors, (2616), 12 states have internal predecessors, (2616), 0 states have call successors, (0), 0 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 16:29:38,589 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 218.0) internal successors, (2616), 12 states have internal predecessors, (2616), 0 states have call successors, (0), 0 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 16:29:38,589 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 91 flow. Second operand 11 states and 858 transitions. [2023-08-30 16:29:38,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 69 transitions, 328 flow [2023-08-30 16:29:38,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 69 transitions, 323 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:29:38,592 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 214 flow [2023-08-30 16:29:38,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=214, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-30 16:29:38,592 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 22 predicate places. [2023-08-30 16:29:38,593 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 214 flow [2023-08-30 16:29:38,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 73.6) internal successors, (736), 10 states have internal predecessors, (736), 0 states have call successors, (0), 0 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 16:29:38,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:29:38,594 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:29:38,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 16:29:38,594 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:29:38,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:29:38,594 INFO L85 PathProgramCache]: Analyzing trace with hash -740293209, now seen corresponding path program 1 times [2023-08-30 16:29:38,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:29:38,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391736691] [2023-08-30 16:29:38,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:29:38,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:29:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:29:39,029 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 16:29:39,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:29:39,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391736691] [2023-08-30 16:29:39,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391736691] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:29:39,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606328945] [2023-08-30 16:29:39,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:29:39,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:29:39,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:29:39,037 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 16:29:39,064 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 16:29:39,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:29:39,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 16:29:39,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:29:39,224 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:29:39,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 16:29:39,566 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 16:29:39,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-08-30 16:29:39,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 16:29:39,656 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 16:29:39,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:29:39,667 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_142 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_142) |c_~#top~0.base|) |c_~#top~0.offset|) 0))) is different from false [2023-08-30 16:29:39,825 INFO L321 Elim1Store]: treesize reduction 15, result has 64.3 percent of original size [2023-08-30 16:29:39,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 38 [2023-08-30 16:29:39,834 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:29:39,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2023-08-30 16:29:39,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-08-30 16:29:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 16:29:39,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606328945] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:29:39,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:29:39,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-08-30 16:29:39,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492755254] [2023-08-30 16:29:39,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:29:39,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 16:29:39,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:29:39,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 16:29:39,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=4, NotChecked=42, Total=552 [2023-08-30 16:29:39,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 218 [2023-08-30 16:29:40,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 214 flow. Second operand has 24 states, 24 states have (on average 52.166666666666664) internal successors, (1252), 24 states have internal predecessors, (1252), 0 states have call successors, (0), 0 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 16:29:40,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:29:40,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 218 [2023-08-30 16:29:40,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:29:43,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:29:45,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:29:47,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:29:49,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:29:51,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:29:53,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:29:54,204 INFO L130 PetriNetUnfolder]: 267/648 cut-off events. [2023-08-30 16:29:54,205 INFO L131 PetriNetUnfolder]: For 708/708 co-relation queries the response was YES. [2023-08-30 16:29:54,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2121 conditions, 648 events. 267/648 cut-off events. For 708/708 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2396 event pairs, 8 based on Foata normal form. 10/610 useless extension candidates. Maximal degree in co-relation 2047. Up to 118 conditions per place. [2023-08-30 16:29:54,210 INFO L137 encePairwiseOnDemand]: 202/218 looper letters, 155 selfloop transitions, 100 changer transitions 1/257 dead transitions. [2023-08-30 16:29:54,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 257 transitions, 1697 flow [2023-08-30 16:29:54,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-30 16:29:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-30 16:29:54,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2386 transitions. [2023-08-30 16:29:54,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25453381694047367 [2023-08-30 16:29:54,218 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2386 transitions. [2023-08-30 16:29:54,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2386 transitions. [2023-08-30 16:29:54,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:29:54,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2386 transitions. [2023-08-30 16:29:54,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 55.48837209302326) internal successors, (2386), 43 states have internal predecessors, (2386), 0 states have call successors, (0), 0 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 16:29:54,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 218.0) internal successors, (9592), 44 states have internal predecessors, (9592), 0 states have call successors, (0), 0 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 16:29:54,236 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 218.0) internal successors, (9592), 44 states have internal predecessors, (9592), 0 states have call successors, (0), 0 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 16:29:54,236 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 214 flow. Second operand 43 states and 2386 transitions. [2023-08-30 16:29:54,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 257 transitions, 1697 flow [2023-08-30 16:29:54,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 257 transitions, 1671 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-30 16:29:54,245 INFO L231 Difference]: Finished difference. Result has 104 places, 136 transitions, 1091 flow [2023-08-30 16:29:54,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=1091, PETRI_PLACES=104, PETRI_TRANSITIONS=136} [2023-08-30 16:29:54,246 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 80 predicate places. [2023-08-30 16:29:54,246 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 136 transitions, 1091 flow [2023-08-30 16:29:54,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 52.166666666666664) internal successors, (1252), 24 states have internal predecessors, (1252), 0 states have call successors, (0), 0 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 16:29:54,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:29:54,247 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:29:54,256 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 16:29:54,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:29:54,448 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:29:54,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:29:54,448 INFO L85 PathProgramCache]: Analyzing trace with hash 891701287, now seen corresponding path program 1 times [2023-08-30 16:29:54,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:29:54,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958593055] [2023-08-30 16:29:54,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:29:54,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:29:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:29:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:29:54,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:29:54,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958593055] [2023-08-30 16:29:54,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958593055] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:29:54,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710633909] [2023-08-30 16:29:54,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:29:54,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:29:54,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:29:54,535 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:29:54,562 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 16:29:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:29:54,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 16:29:54,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:29:54,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:29:54,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:29:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:29:54,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710633909] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:29:54,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:29:54,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 16:29:54,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828842946] [2023-08-30 16:29:54,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:29:54,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:29:54,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:29:54,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:29:54,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:29:54,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 218 [2023-08-30 16:29:54,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 136 transitions, 1091 flow. Second operand has 7 states, 7 states have (on average 102.42857142857143) internal successors, (717), 7 states have internal predecessors, (717), 0 states have call successors, (0), 0 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 16:29:54,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:29:54,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 218 [2023-08-30 16:29:54,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:29:55,054 INFO L130 PetriNetUnfolder]: 341/840 cut-off events. [2023-08-30 16:29:55,054 INFO L131 PetriNetUnfolder]: For 5251/5251 co-relation queries the response was YES. [2023-08-30 16:29:55,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4416 conditions, 840 events. 341/840 cut-off events. For 5251/5251 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2999 event pairs, 22 based on Foata normal form. 15/846 useless extension candidates. Maximal degree in co-relation 4315. Up to 428 conditions per place. [2023-08-30 16:29:55,063 INFO L137 encePairwiseOnDemand]: 214/218 looper letters, 178 selfloop transitions, 18 changer transitions 4/201 dead transitions. [2023-08-30 16:29:55,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 201 transitions, 2030 flow [2023-08-30 16:29:55,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:29:55,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:29:55,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 646 transitions. [2023-08-30 16:29:55,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4938837920489297 [2023-08-30 16:29:55,066 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 646 transitions. [2023-08-30 16:29:55,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 646 transitions. [2023-08-30 16:29:55,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:29:55,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 646 transitions. [2023-08-30 16:29:55,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 107.66666666666667) internal successors, (646), 6 states have internal predecessors, (646), 0 states have call successors, (0), 0 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 16:29:55,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 218.0) internal successors, (1526), 7 states have internal predecessors, (1526), 0 states have call successors, (0), 0 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 16:29:55,071 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 218.0) internal successors, (1526), 7 states have internal predecessors, (1526), 0 states have call successors, (0), 0 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 16:29:55,071 INFO L175 Difference]: Start difference. First operand has 104 places, 136 transitions, 1091 flow. Second operand 6 states and 646 transitions. [2023-08-30 16:29:55,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 201 transitions, 2030 flow [2023-08-30 16:29:55,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 201 transitions, 1820 flow, removed 91 selfloop flow, removed 8 redundant places. [2023-08-30 16:29:55,090 INFO L231 Difference]: Finished difference. Result has 104 places, 139 transitions, 1049 flow [2023-08-30 16:29:55,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1049, PETRI_PLACES=104, PETRI_TRANSITIONS=139} [2023-08-30 16:29:55,091 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 80 predicate places. [2023-08-30 16:29:55,092 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 139 transitions, 1049 flow [2023-08-30 16:29:55,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 102.42857142857143) internal successors, (717), 7 states have internal predecessors, (717), 0 states have call successors, (0), 0 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 16:29:55,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:29:55,092 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:29:55,099 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 16:29:55,298 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,SelfDestructingSolverStorable5 [2023-08-30 16:29:55,299 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:29:55,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:29:55,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1946686449, now seen corresponding path program 1 times [2023-08-30 16:29:55,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:29:55,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623107542] [2023-08-30 16:29:55,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:29:55,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:29:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:29:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:29:56,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:29:56,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623107542] [2023-08-30 16:29:56,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623107542] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:29:56,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123385645] [2023-08-30 16:29:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:29:56,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:29:56,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:29:56,235 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 16:29:56,243 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 16:29:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:29:56,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 16:29:56,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:29:56,746 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-08-30 16:29:56,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2023-08-30 16:29:56,789 INFO L321 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2023-08-30 16:29:56,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 85 [2023-08-30 16:29:56,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 16:29:56,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 16:29:56,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 6 [2023-08-30 16:29:56,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 16:29:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:29:57,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:29:57,304 INFO L321 Elim1Store]: treesize reduction 26, result has 65.3 percent of original size [2023-08-30 16:29:57,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 111 [2023-08-30 16:29:57,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:29:57,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 52 [2023-08-30 16:29:57,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-30 16:29:57,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:29:57,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 257 [2023-08-30 16:29:57,494 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:29:57,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 92 [2023-08-30 16:29:57,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:29:57,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 87 [2023-08-30 16:29:57,516 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:29:57,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 85 [2023-08-30 16:29:57,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-30 16:29:57,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-30 16:29:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:29:57,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123385645] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:29:57,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:29:57,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 28 [2023-08-30 16:29:57,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238820123] [2023-08-30 16:29:57,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:29:57,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 16:29:57,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:29:57,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 16:29:57,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2023-08-30 16:29:59,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 218 [2023-08-30 16:29:59,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 139 transitions, 1049 flow. Second operand has 30 states, 30 states have (on average 63.733333333333334) internal successors, (1912), 30 states have internal predecessors, (1912), 0 states have call successors, (0), 0 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 16:29:59,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:29:59,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 218 [2023-08-30 16:29:59,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:30:02,784 INFO L130 PetriNetUnfolder]: 378/1004 cut-off events. [2023-08-30 16:30:02,785 INFO L131 PetriNetUnfolder]: For 5769/5769 co-relation queries the response was YES. [2023-08-30 16:30:02,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4996 conditions, 1004 events. 378/1004 cut-off events. For 5769/5769 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4238 event pairs, 14 based on Foata normal form. 9/1004 useless extension candidates. Maximal degree in co-relation 4826. Up to 421 conditions per place. [2023-08-30 16:30:02,794 INFO L137 encePairwiseOnDemand]: 202/218 looper letters, 194 selfloop transitions, 136 changer transitions 12/343 dead transitions. [2023-08-30 16:30:02,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 343 transitions, 3513 flow [2023-08-30 16:30:02,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 16:30:02,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 16:30:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3127 transitions. [2023-08-30 16:30:02,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29883409785932724 [2023-08-30 16:30:02,806 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3127 transitions. [2023-08-30 16:30:02,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3127 transitions. [2023-08-30 16:30:02,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:30:02,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3127 transitions. [2023-08-30 16:30:02,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 65.14583333333333) internal successors, (3127), 48 states have internal predecessors, (3127), 0 states have call successors, (0), 0 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 16:30:02,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 218.0) internal successors, (10682), 49 states have internal predecessors, (10682), 0 states have call successors, (0), 0 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 16:30:02,836 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 218.0) internal successors, (10682), 49 states have internal predecessors, (10682), 0 states have call successors, (0), 0 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 16:30:02,836 INFO L175 Difference]: Start difference. First operand has 104 places, 139 transitions, 1049 flow. Second operand 48 states and 3127 transitions. [2023-08-30 16:30:02,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 343 transitions, 3513 flow [2023-08-30 16:30:02,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 343 transitions, 3502 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 16:30:02,867 INFO L231 Difference]: Finished difference. Result has 168 places, 247 transitions, 2692 flow [2023-08-30 16:30:02,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2692, PETRI_PLACES=168, PETRI_TRANSITIONS=247} [2023-08-30 16:30:02,868 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 144 predicate places. [2023-08-30 16:30:02,868 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 247 transitions, 2692 flow [2023-08-30 16:30:02,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 63.733333333333334) internal successors, (1912), 30 states have internal predecessors, (1912), 0 states have call successors, (0), 0 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 16:30:02,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:30:02,870 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:30:02,876 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 16:30:03,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:30:03,076 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:30:03,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:30:03,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1293322667, now seen corresponding path program 2 times [2023-08-30 16:30:03,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:30:03,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389684254] [2023-08-30 16:30:03,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:30:03,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:30:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:30:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-08-30 16:30:03,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:30:03,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389684254] [2023-08-30 16:30:03,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389684254] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:30:03,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:30:03,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:30:03,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945875116] [2023-08-30 16:30:03,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:30:03,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:30:03,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:30:03,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:30:03,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:30:03,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 218 [2023-08-30 16:30:03,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 247 transitions, 2692 flow. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 16:30:03,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:30:03,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 218 [2023-08-30 16:30:03,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:30:03,571 INFO L130 PetriNetUnfolder]: 477/1235 cut-off events. [2023-08-30 16:30:03,571 INFO L131 PetriNetUnfolder]: For 9715/9715 co-relation queries the response was YES. [2023-08-30 16:30:03,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7506 conditions, 1235 events. 477/1235 cut-off events. For 9715/9715 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 5454 event pairs, 141 based on Foata normal form. 6/1235 useless extension candidates. Maximal degree in co-relation 7309. Up to 900 conditions per place. [2023-08-30 16:30:03,585 INFO L137 encePairwiseOnDemand]: 215/218 looper letters, 306 selfloop transitions, 13 changer transitions 0/320 dead transitions. [2023-08-30 16:30:03,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 320 transitions, 4010 flow [2023-08-30 16:30:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:30:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:30:03,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-08-30 16:30:03,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-30 16:30:03,587 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-08-30 16:30:03,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-08-30 16:30:03,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:30:03,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-08-30 16:30:03,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 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 16:30:03,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 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 16:30:03,590 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 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 16:30:03,590 INFO L175 Difference]: Start difference. First operand has 168 places, 247 transitions, 2692 flow. Second operand 3 states and 327 transitions. [2023-08-30 16:30:03,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 320 transitions, 4010 flow [2023-08-30 16:30:03,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 320 transitions, 3486 flow, removed 244 selfloop flow, removed 12 redundant places. [2023-08-30 16:30:03,652 INFO L231 Difference]: Finished difference. Result has 160 places, 259 transitions, 2343 flow [2023-08-30 16:30:03,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=2170, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2343, PETRI_PLACES=160, PETRI_TRANSITIONS=259} [2023-08-30 16:30:03,655 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 136 predicate places. [2023-08-30 16:30:03,655 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 259 transitions, 2343 flow [2023-08-30 16:30:03,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 16:30:03,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:30:03,657 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:30:03,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 16:30:03,658 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:30:03,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:30:03,658 INFO L85 PathProgramCache]: Analyzing trace with hash 760072843, now seen corresponding path program 2 times [2023-08-30 16:30:03,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:30:03,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926986292] [2023-08-30 16:30:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:30:03,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:30:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:30:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-08-30 16:30:04,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:30:04,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926986292] [2023-08-30 16:30:04,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926986292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:30:04,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574612700] [2023-08-30 16:30:04,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:30:04,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:30:04,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:30:04,571 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 16:30:04,602 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 16:30:04,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:30:04,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:30:04,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-30 16:30:04,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:30:05,268 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-08-30 16:30:05,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2023-08-30 16:30:05,301 INFO L321 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2023-08-30 16:30:05,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 85 [2023-08-30 16:30:05,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 16:30:05,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 35 [2023-08-30 16:30:05,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 16:30:05,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 65 [2023-08-30 16:30:05,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 38 [2023-08-30 16:30:05,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 16:30:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:30:05,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:30:05,627 INFO L321 Elim1Store]: treesize reduction 26, result has 65.3 percent of original size [2023-08-30 16:30:05,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 111 [2023-08-30 16:30:05,645 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:30:05,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 70 [2023-08-30 16:30:05,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-30 16:30:05,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:30:05,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 212 [2023-08-30 16:30:05,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:30:05,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 66 [2023-08-30 16:30:05,800 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:30:05,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 61 [2023-08-30 16:30:05,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-30 16:30:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:30:06,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574612700] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:30:06,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:30:06,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2023-08-30 16:30:06,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425253711] [2023-08-30 16:30:06,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:30:06,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 16:30:06,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:30:06,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 16:30:06,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2023-08-30 16:30:06,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 218 [2023-08-30 16:30:06,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 259 transitions, 2343 flow. Second operand has 28 states, 28 states have (on average 81.07142857142857) internal successors, (2270), 28 states have internal predecessors, (2270), 0 states have call successors, (0), 0 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 16:30:06,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:30:06,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 218 [2023-08-30 16:30:06,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:30:09,211 INFO L130 PetriNetUnfolder]: 518/1420 cut-off events. [2023-08-30 16:30:09,211 INFO L131 PetriNetUnfolder]: For 8936/8936 co-relation queries the response was YES. [2023-08-30 16:30:09,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8054 conditions, 1420 events. 518/1420 cut-off events. For 8936/8936 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 6586 event pairs, 6 based on Foata normal form. 14/1434 useless extension candidates. Maximal degree in co-relation 7805. Up to 449 conditions per place. [2023-08-30 16:30:09,223 INFO L137 encePairwiseOnDemand]: 203/218 looper letters, 127 selfloop transitions, 83 changer transitions 239/450 dead transitions. [2023-08-30 16:30:09,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 450 transitions, 5174 flow [2023-08-30 16:30:09,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-30 16:30:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-30 16:30:09,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3653 transitions. [2023-08-30 16:30:09,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.372375127420999 [2023-08-30 16:30:09,232 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3653 transitions. [2023-08-30 16:30:09,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3653 transitions. [2023-08-30 16:30:09,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:30:09,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3653 transitions. [2023-08-30 16:30:09,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 81.17777777777778) internal successors, (3653), 45 states have internal predecessors, (3653), 0 states have call successors, (0), 0 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 16:30:09,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 218.0) internal successors, (10028), 46 states have internal predecessors, (10028), 0 states have call successors, (0), 0 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 16:30:09,255 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 218.0) internal successors, (10028), 46 states have internal predecessors, (10028), 0 states have call successors, (0), 0 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 16:30:09,255 INFO L175 Difference]: Start difference. First operand has 160 places, 259 transitions, 2343 flow. Second operand 45 states and 3653 transitions. [2023-08-30 16:30:09,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 450 transitions, 5174 flow [2023-08-30 16:30:09,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 450 transitions, 5144 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 16:30:09,305 INFO L231 Difference]: Finished difference. Result has 216 places, 152 transitions, 1700 flow [2023-08-30 16:30:09,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=2289, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1700, PETRI_PLACES=216, PETRI_TRANSITIONS=152} [2023-08-30 16:30:09,306 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 192 predicate places. [2023-08-30 16:30:09,306 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 152 transitions, 1700 flow [2023-08-30 16:30:09,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 81.07142857142857) internal successors, (2270), 28 states have internal predecessors, (2270), 0 states have call successors, (0), 0 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 16:30:09,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:30:09,308 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:30:09,318 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 16:30:09,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:30:09,514 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:30:09,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:30:09,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1735330572, now seen corresponding path program 1 times [2023-08-30 16:30:09,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:30:09,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103250643] [2023-08-30 16:30:09,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:30:09,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:30:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:30:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 157 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:30:09,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:30:09,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103250643] [2023-08-30 16:30:09,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103250643] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:30:09,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830799946] [2023-08-30 16:30:09,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:30:09,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:30:09,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:30:09,881 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 16:30:09,896 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 16:30:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:30:10,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 16:30:10,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:30:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 176 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:30:10,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:30:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 176 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:30:10,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830799946] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:30:10,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:30:10,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-30 16:30:10,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14422111] [2023-08-30 16:30:10,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:30:10,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 16:30:10,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:30:10,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 16:30:10,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2023-08-30 16:30:10,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 218 [2023-08-30 16:30:10,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 152 transitions, 1700 flow. Second operand has 20 states, 20 states have (on average 96.4) internal successors, (1928), 20 states have internal predecessors, (1928), 0 states have call successors, (0), 0 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 16:30:10,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:30:10,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 218 [2023-08-30 16:30:10,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:30:11,092 INFO L130 PetriNetUnfolder]: 208/639 cut-off events. [2023-08-30 16:30:11,092 INFO L131 PetriNetUnfolder]: For 4483/4483 co-relation queries the response was YES. [2023-08-30 16:30:11,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4077 conditions, 639 events. 208/639 cut-off events. For 4483/4483 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2189 event pairs, 11 based on Foata normal form. 3/642 useless extension candidates. Maximal degree in co-relation 4011. Up to 230 conditions per place. [2023-08-30 16:30:11,097 INFO L137 encePairwiseOnDemand]: 211/218 looper letters, 0 selfloop transitions, 0 changer transitions 165/165 dead transitions. [2023-08-30 16:30:11,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 165 transitions, 2099 flow [2023-08-30 16:30:11,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 16:30:11,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 16:30:11,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2157 transitions. [2023-08-30 16:30:11,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43019545273234944 [2023-08-30 16:30:11,102 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2157 transitions. [2023-08-30 16:30:11,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2157 transitions. [2023-08-30 16:30:11,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:30:11,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2157 transitions. [2023-08-30 16:30:11,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 93.78260869565217) internal successors, (2157), 23 states have internal predecessors, (2157), 0 states have call successors, (0), 0 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 16:30:11,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 218.0) internal successors, (5232), 24 states have internal predecessors, (5232), 0 states have call successors, (0), 0 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 16:30:11,113 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 218.0) internal successors, (5232), 24 states have internal predecessors, (5232), 0 states have call successors, (0), 0 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 16:30:11,113 INFO L175 Difference]: Start difference. First operand has 216 places, 152 transitions, 1700 flow. Second operand 23 states and 2157 transitions. [2023-08-30 16:30:11,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 165 transitions, 2099 flow [2023-08-30 16:30:11,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 165 transitions, 1527 flow, removed 145 selfloop flow, removed 66 redundant places. [2023-08-30 16:30:11,140 INFO L231 Difference]: Finished difference. Result has 144 places, 0 transitions, 0 flow [2023-08-30 16:30:11,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=0, PETRI_PLACES=144, PETRI_TRANSITIONS=0} [2023-08-30 16:30:11,140 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 120 predicate places. [2023-08-30 16:30:11,140 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 0 transitions, 0 flow [2023-08-30 16:30:11,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 96.4) internal successors, (1928), 20 states have internal predecessors, (1928), 0 states have call successors, (0), 0 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 16:30:11,144 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-30 16:30:11,144 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-30 16:30:11,151 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 16:30:11,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 16:30:11,351 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 16:30:11,353 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-30 16:30:11,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 16:30:11,371 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-08-30 16:30:11,371 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:30:11,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-30 16:30:11,372 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 16:30:11,372 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 114 transitions, 233 flow [2023-08-30 16:30:11,373 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:30:11,373 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 114 transitions, 233 flow [2023-08-30 16:30:11,373 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 114 transitions, 233 flow [2023-08-30 16:30:11,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 16:30:11,381 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-08-30 16:30:11,382 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:30:11,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-30 16:30:11,383 INFO L119 LiptonReduction]: Number of co-enabled transitions 2028 [2023-08-30 16:30:14,939 INFO L134 LiptonReduction]: Checked pairs total: 2420 [2023-08-30 16:30:14,940 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-30 16:30:14,941 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:30:14,941 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;@5d7cd86c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:30:14,941 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:30:14,943 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-08-30 16:30:14,943 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:30:14,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:30:14,944 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 16:30:14,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:30:14,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:30:14,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1033171735, now seen corresponding path program 1 times [2023-08-30 16:30:14,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:30:14,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672218103] [2023-08-30 16:30:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:30:14,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:30:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:30:14,964 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:30:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:30:14,985 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:30:14,987 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:30:14,987 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:30:14,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 16:30:14,987 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:30:14,989 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:30:14,989 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:30:14,989 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 16:30:15,037 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:30:15,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-08-30 16:30:15,060 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-08-30 16:30:15,060 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:30:15,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 215 events. 21/215 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 168. Up to 6 conditions per place. [2023-08-30 16:30:15,062 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 193 transitions, 398 flow [2023-08-30 16:30:15,063 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 193 transitions, 398 flow [2023-08-30 16:30:15,063 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:30:15,064 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 193 transitions, 398 flow [2023-08-30 16:30:15,064 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 193 transitions, 398 flow [2023-08-30 16:30:15,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-08-30 16:30:15,083 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-08-30 16:30:15,083 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:30:15,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 215 events. 21/215 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 168. Up to 6 conditions per place. [2023-08-30 16:30:15,091 INFO L119 LiptonReduction]: Number of co-enabled transitions 16380 [2023-08-30 16:30:19,393 INFO L134 LiptonReduction]: Checked pairs total: 30194 [2023-08-30 16:30:19,394 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-08-30 16:30:19,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:30:19,395 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;@5d7cd86c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:30:19,395 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 16:30:19,400 INFO L130 PetriNetUnfolder]: 7/49 cut-off events. [2023-08-30 16:30:19,400 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:30:19,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:30:19,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:30:19,401 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:30:19,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:30:19,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1222593382, now seen corresponding path program 1 times [2023-08-30 16:30:19,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:30:19,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124345837] [2023-08-30 16:30:19,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:30:19,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:30:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:30:19,434 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 16:30:19,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:30:19,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124345837] [2023-08-30 16:30:19,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124345837] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:30:19,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:30:19,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:30:19,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603284678] [2023-08-30 16:30:19,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:30:19,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:30:19,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:30:19,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:30:19,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:30:19,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 348 [2023-08-30 16:30:19,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 66 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 0 states have call successors, (0), 0 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 16:30:19,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:30:19,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 348 [2023-08-30 16:30:19,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:30:19,753 INFO L130 PetriNetUnfolder]: 1355/2321 cut-off events. [2023-08-30 16:30:19,753 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-08-30 16:30:19,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4461 conditions, 2321 events. 1355/2321 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13208 event pairs, 425 based on Foata normal form. 0/1906 useless extension candidates. Maximal degree in co-relation 4036. Up to 1589 conditions per place. [2023-08-30 16:30:19,789 INFO L137 encePairwiseOnDemand]: 333/348 looper letters, 89 selfloop transitions, 8 changer transitions 0/111 dead transitions. [2023-08-30 16:30:19,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 111 transitions, 438 flow [2023-08-30 16:30:19,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 16:30:19,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 16:30:19,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 895 transitions. [2023-08-30 16:30:19,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.514367816091954 [2023-08-30 16:30:19,792 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 895 transitions. [2023-08-30 16:30:19,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 895 transitions. [2023-08-30 16:30:19,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:30:19,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 895 transitions. [2023-08-30 16:30:19,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 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 16:30:19,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 348.0) internal successors, (2088), 6 states have internal predecessors, (2088), 0 states have call successors, (0), 0 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 16:30:19,795 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 348.0) internal successors, (2088), 6 states have internal predecessors, (2088), 0 states have call successors, (0), 0 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 16:30:19,795 INFO L175 Difference]: Start difference. First operand has 57 places, 66 transitions, 144 flow. Second operand 5 states and 895 transitions. [2023-08-30 16:30:19,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 111 transitions, 438 flow [2023-08-30 16:30:19,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 111 transitions, 436 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 16:30:19,798 INFO L231 Difference]: Finished difference. Result has 64 places, 68 transitions, 202 flow [2023-08-30 16:30:19,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=64, PETRI_TRANSITIONS=68} [2023-08-30 16:30:19,799 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2023-08-30 16:30:19,799 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 68 transitions, 202 flow [2023-08-30 16:30:19,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 0 states have call successors, (0), 0 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 16:30:19,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:30:19,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:30:19,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 16:30:19,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:30:19,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:30:19,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1262345611, now seen corresponding path program 1 times [2023-08-30 16:30:19,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:30:19,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27505634] [2023-08-30 16:30:19,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:30:19,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:30:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:30:19,832 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 16:30:19,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:30:19,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27505634] [2023-08-30 16:30:19,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27505634] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:30:19,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:30:19,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:30:19,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980991915] [2023-08-30 16:30:19,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:30:19,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:30:19,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:30:19,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:30:19,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:30:19,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 348 [2023-08-30 16:30:19,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 68 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 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 16:30:19,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:30:19,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 348 [2023-08-30 16:30:19,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:30:20,146 INFO L130 PetriNetUnfolder]: 1677/2865 cut-off events. [2023-08-30 16:30:20,146 INFO L131 PetriNetUnfolder]: For 835/845 co-relation queries the response was YES. [2023-08-30 16:30:20,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6209 conditions, 2865 events. 1677/2865 cut-off events. For 835/845 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17254 event pairs, 381 based on Foata normal form. 54/2605 useless extension candidates. Maximal degree in co-relation 3813. Up to 2215 conditions per place. [2023-08-30 16:30:20,161 INFO L137 encePairwiseOnDemand]: 343/348 looper letters, 70 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2023-08-30 16:30:20,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 90 transitions, 425 flow [2023-08-30 16:30:20,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:30:20,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:30:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 550 transitions. [2023-08-30 16:30:20,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5268199233716475 [2023-08-30 16:30:20,163 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 550 transitions. [2023-08-30 16:30:20,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 550 transitions. [2023-08-30 16:30:20,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:30:20,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 550 transitions. [2023-08-30 16:30:20,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 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 16:30:20,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 16:30:20,165 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 16:30:20,166 INFO L175 Difference]: Start difference. First operand has 64 places, 68 transitions, 202 flow. Second operand 3 states and 550 transitions. [2023-08-30 16:30:20,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 90 transitions, 425 flow [2023-08-30 16:30:20,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 90 transitions, 425 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:30:20,168 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 223 flow [2023-08-30 16:30:20,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=67, PETRI_TRANSITIONS=70} [2023-08-30 16:30:20,169 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2023-08-30 16:30:20,169 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 223 flow [2023-08-30 16:30:20,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 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 16:30:20,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:30:20,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:30:20,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 16:30:20,170 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:30:20,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:30:20,171 INFO L85 PathProgramCache]: Analyzing trace with hash -2082166543, now seen corresponding path program 1 times [2023-08-30 16:30:20,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:30:20,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93016976] [2023-08-30 16:30:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:30:20,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:30:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:30:20,225 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 16:30:20,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:30:20,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93016976] [2023-08-30 16:30:20,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93016976] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:30:20,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:30:20,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:30:20,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776882778] [2023-08-30 16:30:20,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:30:20,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:30:20,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:30:20,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:30:20,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:30:20,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 348 [2023-08-30 16:30:20,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 223 flow. Second operand has 5 states, 5 states have (on average 155.8) internal successors, (779), 5 states have internal predecessors, (779), 0 states have call successors, (0), 0 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 16:30:20,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:30:20,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 348 [2023-08-30 16:30:20,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:30:20,822 INFO L130 PetriNetUnfolder]: 2589/4305 cut-off events. [2023-08-30 16:30:20,822 INFO L131 PetriNetUnfolder]: For 1204/1220 co-relation queries the response was YES. [2023-08-30 16:30:20,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9601 conditions, 4305 events. 2589/4305 cut-off events. For 1204/1220 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 26862 event pairs, 677 based on Foata normal form. 10/3813 useless extension candidates. Maximal degree in co-relation 6997. Up to 2343 conditions per place. [2023-08-30 16:30:20,849 INFO L137 encePairwiseOnDemand]: 340/348 looper letters, 139 selfloop transitions, 8 changer transitions 0/163 dead transitions. [2023-08-30 16:30:20,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 163 transitions, 788 flow [2023-08-30 16:30:20,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:30:20,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:30:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1061 transitions. [2023-08-30 16:30:20,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5081417624521073 [2023-08-30 16:30:20,854 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1061 transitions. [2023-08-30 16:30:20,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1061 transitions. [2023-08-30 16:30:20,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:30:20,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1061 transitions. [2023-08-30 16:30:20,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 176.83333333333334) internal successors, (1061), 6 states have internal predecessors, (1061), 0 states have call successors, (0), 0 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 16:30:20,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 0 states have call successors, (0), 0 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 16:30:20,859 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 0 states have call successors, (0), 0 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 16:30:20,859 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 223 flow. Second operand 6 states and 1061 transitions. [2023-08-30 16:30:20,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 163 transitions, 788 flow [2023-08-30 16:30:20,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 163 transitions, 784 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:30:20,863 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 268 flow [2023-08-30 16:30:20,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2023-08-30 16:30:20,864 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2023-08-30 16:30:20,864 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 268 flow [2023-08-30 16:30:20,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 155.8) internal successors, (779), 5 states have internal predecessors, (779), 0 states have call successors, (0), 0 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 16:30:20,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:30:20,865 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:30:20,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 16:30:20,865 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:30:20,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:30:20,866 INFO L85 PathProgramCache]: Analyzing trace with hash -904241901, now seen corresponding path program 1 times [2023-08-30 16:30:20,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:30:20,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414104447] [2023-08-30 16:30:20,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:30:20,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:30:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:30:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:30:20,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:30:20,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414104447] [2023-08-30 16:30:20,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414104447] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:30:20,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:30:20,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:30:20,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565401133] [2023-08-30 16:30:20,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:30:20,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:30:20,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:30:20,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:30:20,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:30:20,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 348 [2023-08-30 16:30:20,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 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 16:30:20,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:30:20,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 348 [2023-08-30 16:30:20,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:30:21,798 INFO L130 PetriNetUnfolder]: 3961/6479 cut-off events. [2023-08-30 16:30:21,798 INFO L131 PetriNetUnfolder]: For 2146/2160 co-relation queries the response was YES. [2023-08-30 16:30:21,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15099 conditions, 6479 events. 3961/6479 cut-off events. For 2146/2160 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 41946 event pairs, 1075 based on Foata normal form. 10/5735 useless extension candidates. Maximal degree in co-relation 11279. Up to 3738 conditions per place. [2023-08-30 16:30:21,837 INFO L137 encePairwiseOnDemand]: 340/348 looper letters, 151 selfloop transitions, 9 changer transitions 0/177 dead transitions. [2023-08-30 16:30:21,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 177 transitions, 942 flow [2023-08-30 16:30:21,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:30:21,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:30:21,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1058 transitions. [2023-08-30 16:30:21,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067049808429118 [2023-08-30 16:30:21,840 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1058 transitions. [2023-08-30 16:30:21,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1058 transitions. [2023-08-30 16:30:21,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:30:21,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1058 transitions. [2023-08-30 16:30:21,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 176.33333333333334) internal successors, (1058), 6 states have internal predecessors, (1058), 0 states have call successors, (0), 0 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 16:30:21,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 0 states have call successors, (0), 0 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 16:30:21,845 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 0 states have call successors, (0), 0 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 16:30:21,845 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 268 flow. Second operand 6 states and 1058 transitions. [2023-08-30 16:30:21,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 177 transitions, 942 flow [2023-08-30 16:30:21,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 177 transitions, 932 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:30:21,851 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 314 flow [2023-08-30 16:30:21,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=314, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2023-08-30 16:30:21,852 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2023-08-30 16:30:21,852 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 314 flow [2023-08-30 16:30:21,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 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 16:30:21,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:30:21,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:30:21,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 16:30:21,853 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:30:21,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:30:21,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1333451796, now seen corresponding path program 1 times [2023-08-30 16:30:21,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:30:21,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162043742] [2023-08-30 16:30:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:30:21,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:30:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:30:22,183 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 16:30:22,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:30:22,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162043742] [2023-08-30 16:30:22,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162043742] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:30:22,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:30:22,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 16:30:22,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757171107] [2023-08-30 16:30:22,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:30:22,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 16:30:22,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:30:22,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 16:30:22,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-08-30 16:30:22,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 348 [2023-08-30 16:30:22,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 314 flow. Second operand has 11 states, 11 states have (on average 136.72727272727272) internal successors, (1504), 11 states have internal predecessors, (1504), 0 states have call successors, (0), 0 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 16:30:22,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:30:22,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 348 [2023-08-30 16:30:22,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:30:24,939 INFO L130 PetriNetUnfolder]: 7854/12762 cut-off events. [2023-08-30 16:30:24,939 INFO L131 PetriNetUnfolder]: For 3633/3645 co-relation queries the response was YES. [2023-08-30 16:30:24,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30197 conditions, 12762 events. 7854/12762 cut-off events. For 3633/3645 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 87816 event pairs, 1076 based on Foata normal form. 12/11463 useless extension candidates. Maximal degree in co-relation 25422. Up to 5352 conditions per place. [2023-08-30 16:30:25,006 INFO L137 encePairwiseOnDemand]: 325/348 looper letters, 397 selfloop transitions, 102 changer transitions 0/515 dead transitions. [2023-08-30 16:30:25,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 515 transitions, 2709 flow [2023-08-30 16:30:25,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 16:30:25,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 16:30:25,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3019 transitions. [2023-08-30 16:30:25,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45659407138535996 [2023-08-30 16:30:25,011 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3019 transitions. [2023-08-30 16:30:25,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3019 transitions. [2023-08-30 16:30:25,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:30:25,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3019 transitions. [2023-08-30 16:30:25,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 158.89473684210526) internal successors, (3019), 19 states have internal predecessors, (3019), 0 states have call successors, (0), 0 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 16:30:25,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 348.0) internal successors, (6960), 20 states have internal predecessors, (6960), 0 states have call successors, (0), 0 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 16:30:25,024 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 348.0) internal successors, (6960), 20 states have internal predecessors, (6960), 0 states have call successors, (0), 0 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 16:30:25,024 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 314 flow. Second operand 19 states and 3019 transitions. [2023-08-30 16:30:25,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 515 transitions, 2709 flow [2023-08-30 16:30:25,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 515 transitions, 2692 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:30:25,038 INFO L231 Difference]: Finished difference. Result has 110 places, 196 transitions, 1098 flow [2023-08-30 16:30:25,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1098, PETRI_PLACES=110, PETRI_TRANSITIONS=196} [2023-08-30 16:30:25,039 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 53 predicate places. [2023-08-30 16:30:25,039 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 196 transitions, 1098 flow [2023-08-30 16:30:25,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 136.72727272727272) internal successors, (1504), 11 states have internal predecessors, (1504), 0 states have call successors, (0), 0 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 16:30:25,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:30:25,040 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:30:25,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 16:30:25,040 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:30:25,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:30:25,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1145727331, now seen corresponding path program 1 times [2023-08-30 16:30:25,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:30:25,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428844771] [2023-08-30 16:30:25,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:30:25,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:30:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:30:25,502 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 16:30:25,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:30:25,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428844771] [2023-08-30 16:30:25,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428844771] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:30:25,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349995684] [2023-08-30 16:30:25,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:30:25,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:30:25,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:30:25,505 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 16:30:25,536 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 16:30:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:30:25,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 68 conjunts are in the unsatisfiable core [2023-08-30 16:30:25,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:30:25,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 16:30:25,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:30:25,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 16:30:25,939 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 16:30:25,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 32 [2023-08-30 16:30:26,066 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 16:30:26,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 36 [2023-08-30 16:30:26,169 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:30:26,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2023-08-30 16:30:26,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-30 16:30:26,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 16:30:26,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2023-08-30 16:30:26,359 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 16:30:26,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:30:26,397 INFO L321 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-08-30 16:30:26,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 66 [2023-08-30 16:30:26,423 INFO L321 Elim1Store]: treesize reduction 22, result has 45.0 percent of original size [2023-08-30 16:30:26,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 66 [2023-08-30 16:30:26,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 190 [2023-08-30 16:30:26,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-30 16:30:26,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:30:26,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 44 [2023-08-30 16:30:26,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-30 16:30:26,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2023-08-30 16:30:26,702 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1001 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#m~0.base| v_ArrVal_1001) |c_~#top~0.base|) |c_~#top~0.offset|) 0)) (not (= |c_thr1Thread1of2ForFork0_push_~#casret~0#1.base| |c_~#top~0.base|)) (not (= |c_thr1Thread1of2ForFork0_index_malloc_~curr_alloc_idx~0#1| 0))) is different from false [2023-08-30 16:30:26,745 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1001 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#m~0.base| v_ArrVal_1001) |c_~#top~0.base|) |c_~#top~0.offset|) 0)) (not (= c_~next_alloc_idx~0 0)) (not (= |c_thr1Thread1of2ForFork0_push_~#casret~0#1.base| |c_~#top~0.base|))) is different from false [2023-08-30 16:30:26,979 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((|v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| Int)) (or (forall ((v_ArrVal_999 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| v_ArrVal_999))) (or (forall ((v_ArrVal_1001 (Array Int Int))) (= (select (select (store .cse0 |c_~#m~0.base| v_ArrVal_1001) |c_~#top~0.base|) |c_~#top~0.offset|) 0)) (forall ((|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int)) (not (= (+ (select (select .cse0 |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) 0) 1) 0)))))) (< |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| |c_~#m2~0.base|))) (forall ((|v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| Int)) (or (< |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| |c_~#m2~0.base|) (forall ((v_ArrVal_999 (Array Int Int))) (not (= 0 (+ (select (select (store |c_#memory_int| |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| v_ArrVal_999) |c_~#top~0.base|) 0) 1)))))) (or (forall ((|v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| Int) (v_ArrVal_999 (Array Int Int)) (|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int)) (or (< |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| |c_~#m2~0.base|) (not (= (+ (select (select (store |c_#memory_int| |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| v_ArrVal_999) |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) 0) 1) 0)))) (not (= c_~next_alloc_idx~0 0)))) is different from false [2023-08-30 16:30:27,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:30:27,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2023-08-30 16:30:27,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:30:27,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 40 [2023-08-30 16:30:27,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2023-08-30 16:30:27,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:30:27,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2023-08-30 16:30:27,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:30:27,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2023-08-30 16:30:27,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2023-08-30 16:30:27,143 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:30:27,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 35 [2023-08-30 16:30:27,147 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 16:30:27,155 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 16:30:27,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 49 [2023-08-30 16:30:27,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2023-08-30 16:30:27,223 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 16:30:27,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349995684] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:30:27,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:30:27,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 32 [2023-08-30 16:30:27,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917690113] [2023-08-30 16:30:27,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:30:27,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 16:30:27,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:30:27,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 16:30:27,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=846, Unknown=8, NotChecked=180, Total=1122 [2023-08-30 16:30:27,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 348 [2023-08-30 16:30:27,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 196 transitions, 1098 flow. Second operand has 34 states, 34 states have (on average 112.79411764705883) internal successors, (3835), 34 states have internal predecessors, (3835), 0 states have call successors, (0), 0 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 16:30:27,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:30:27,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 348 [2023-08-30 16:30:27,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:30:33,528 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (not (= c_~next_alloc_idx~0 0))) (.cse1 (forall ((|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int)) (not (= (+ (select (select |c_#memory_int| |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) 0) 1) 0))))) (and (not (= |c_~#m~0.base| |c_~#top~0.base|)) (forall ((|v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| Int)) (or (forall ((v_ArrVal_999 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| v_ArrVal_999))) (or (forall ((v_ArrVal_1001 (Array Int Int))) (= (select (select (store .cse0 |c_~#m~0.base| v_ArrVal_1001) |c_~#top~0.base|) |c_~#top~0.offset|) 0)) (forall ((|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int)) (not (= (+ (select (select .cse0 |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) 0) 1) 0)))))) (< |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| |c_~#m2~0.base|))) (= |c_~#top~0.offset| 0) (or (forall ((v_ArrVal_1001 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#m~0.base| v_ArrVal_1001) |c_~#top~0.base|) |c_~#top~0.offset|) 0)) .cse1) (forall ((|v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| Int)) (or (< |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| |c_~#m2~0.base|) (forall ((v_ArrVal_999 (Array Int Int))) (not (= 0 (+ (select (select (store |c_#memory_int| |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| v_ArrVal_999) |c_~#top~0.base|) 0) 1)))))) (or (forall ((|v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| Int) (v_ArrVal_999 (Array Int Int)) (|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int)) (or (< |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| |c_~#m2~0.base|) (not (= (+ (select (select (store |c_#memory_int| |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| v_ArrVal_999) |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) 0) 1) 0)))) .cse2) .cse2 (not (= (+ (select (select |c_#memory_int| |c_~#top~0.base|) 0) 1) 0)) (or .cse2 .cse1) (< |c_~#top~0.base| |c_~#m2~0.base|))) is different from false [2023-08-30 16:30:43,997 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (not (= c_~next_alloc_idx~0 0))) (.cse1 (forall ((|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int)) (not (= (+ (select (select |c_#memory_int| |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) 0) 1) 0)))) (.cse4 (select |c_#memory_int| |c_~#top~0.base|)) (.cse0 (forall ((v_ArrVal_1001 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#m~0.base| v_ArrVal_1001) |c_~#top~0.base|) |c_~#top~0.offset|) 0))) (.cse3 (forall ((|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int)) (not (= (+ (select (select |c_#memory_int| |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) |c_thr1Thread1of2ForFork0_push_~#casret~0#1.offset|) 1) 0))))) (and .cse0 (or .cse0 .cse1) (or .cse2 .cse3) .cse2 (not (= (+ (select .cse4 0) 1) 0)) (or .cse2 .cse1) (not (= (+ (select .cse4 |c_thr1Thread1of2ForFork0_push_~#casret~0#1.offset|) 1) 0)) (not (= |c_thr1Thread1of2ForFork0_push_~#casret~0#1.base| |c_~#top~0.base|)) (or .cse0 .cse3))) is different from false [2023-08-30 16:31:07,297 INFO L130 PetriNetUnfolder]: 58292/94915 cut-off events. [2023-08-30 16:31:07,298 INFO L131 PetriNetUnfolder]: For 116741/116780 co-relation queries the response was YES. [2023-08-30 16:31:07,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295516 conditions, 94915 events. 58292/94915 cut-off events. For 116741/116780 co-relation queries the response was YES. Maximal size of possible extension queue 3558. Compared 851994 event pairs, 2019 based on Foata normal form. 1043/89257 useless extension candidates. Maximal degree in co-relation 261747. Up to 15630 conditions per place. [2023-08-30 16:31:08,110 INFO L137 encePairwiseOnDemand]: 307/348 looper letters, 3497 selfloop transitions, 1736 changer transitions 0/5245 dead transitions. [2023-08-30 16:31:08,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 5245 transitions, 35270 flow [2023-08-30 16:31:08,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2023-08-30 16:31:08,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2023-08-30 16:31:08,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 23040 transitions. [2023-08-30 16:31:08,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.380499405469679 [2023-08-30 16:31:08,141 INFO L72 ComplementDD]: Start complementDD. Operand 174 states and 23040 transitions. [2023-08-30 16:31:08,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 174 states and 23040 transitions. [2023-08-30 16:31:08,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:31:08,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 174 states and 23040 transitions. [2023-08-30 16:31:08,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 175 states, 174 states have (on average 132.41379310344828) internal successors, (23040), 174 states have internal predecessors, (23040), 0 states have call successors, (0), 0 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 16:31:08,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 175 states, 175 states have (on average 348.0) internal successors, (60900), 175 states have internal predecessors, (60900), 0 states have call successors, (0), 0 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 16:31:08,253 INFO L81 ComplementDD]: Finished complementDD. Result has 175 states, 175 states have (on average 348.0) internal successors, (60900), 175 states have internal predecessors, (60900), 0 states have call successors, (0), 0 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 16:31:08,253 INFO L175 Difference]: Start difference. First operand has 110 places, 196 transitions, 1098 flow. Second operand 174 states and 23040 transitions. [2023-08-30 16:31:08,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 5245 transitions, 35270 flow [2023-08-30 16:31:09,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 5245 transitions, 35235 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 16:31:09,061 INFO L231 Difference]: Finished difference. Result has 433 places, 2114 transitions, 19598 flow [2023-08-30 16:31:09,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=174, PETRI_FLOW=19598, PETRI_PLACES=433, PETRI_TRANSITIONS=2114} [2023-08-30 16:31:09,062 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 376 predicate places. [2023-08-30 16:31:09,062 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 2114 transitions, 19598 flow [2023-08-30 16:31:09,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 112.79411764705883) internal successors, (3835), 34 states have internal predecessors, (3835), 0 states have call successors, (0), 0 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 16:31:09,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:31:09,063 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:31:09,072 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 16:31:09,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 16:31:09,269 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:31:09,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:31:09,269 INFO L85 PathProgramCache]: Analyzing trace with hash -412835617, now seen corresponding path program 2 times [2023-08-30 16:31:09,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:31:09,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141139492] [2023-08-30 16:31:09,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:31:09,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:31:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:31:09,687 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 16:31:09,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:31:09,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141139492] [2023-08-30 16:31:09,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141139492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:31:09,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769961022] [2023-08-30 16:31:09,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:31:09,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:31:09,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:31:09,689 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 16:31:09,691 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 16:31:09,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:31:09,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:31:09,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-30 16:31:09,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:31:09,856 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:31:09,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 16:31:10,198 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 16:31:10,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-08-30 16:31:10,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 16:31:10,353 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 16:31:10,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:31:10,358 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1071 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_1071) |c_~#top~0.base|) |c_~#top~0.offset|) 0))) is different from false [2023-08-30 16:31:10,550 INFO L321 Elim1Store]: treesize reduction 15, result has 64.3 percent of original size [2023-08-30 16:31:10,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 38 [2023-08-30 16:31:10,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:31:10,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2023-08-30 16:31:10,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-08-30 16:31:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 16:31:10,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769961022] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:31:10,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:31:10,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 25 [2023-08-30 16:31:10,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141356478] [2023-08-30 16:31:10,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:31:10,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 16:31:10,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:31:10,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 16:31:10,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=549, Unknown=20, NotChecked=48, Total=702 [2023-08-30 16:31:10,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 348 [2023-08-30 16:31:10,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 2114 transitions, 19598 flow. Second operand has 27 states, 27 states have (on average 105.29629629629629) internal successors, (2843), 27 states have internal predecessors, (2843), 0 states have call successors, (0), 0 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 16:31:10,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:31:10,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 348 [2023-08-30 16:31:10,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:32:51,832 INFO L130 PetriNetUnfolder]: 124376/203579 cut-off events. [2023-08-30 16:32:51,833 INFO L131 PetriNetUnfolder]: For 12733587/12733677 co-relation queries the response was YES. [2023-08-30 16:32:57,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1623304 conditions, 203579 events. 124376/203579 cut-off events. For 12733587/12733677 co-relation queries the response was YES. Maximal size of possible extension queue 6489. Compared 1993094 event pairs, 5392 based on Foata normal form. 1261/188809 useless extension candidates. Maximal degree in co-relation 1619585. Up to 63810 conditions per place. [2023-08-30 16:32:58,867 INFO L137 encePairwiseOnDemand]: 303/348 looper letters, 3459 selfloop transitions, 4500 changer transitions 0/7971 dead transitions. [2023-08-30 16:32:58,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 7971 transitions, 115651 flow [2023-08-30 16:32:58,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-08-30 16:32:58,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2023-08-30 16:32:58,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 12034 transitions. [2023-08-30 16:32:58,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3718329007539241 [2023-08-30 16:32:58,883 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 12034 transitions. [2023-08-30 16:32:58,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 12034 transitions. [2023-08-30 16:32:58,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:32:58,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 12034 transitions. [2023-08-30 16:32:58,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 129.3978494623656) internal successors, (12034), 93 states have internal predecessors, (12034), 0 states have call successors, (0), 0 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 16:32:58,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 348.0) internal successors, (32712), 94 states have internal predecessors, (32712), 0 states have call successors, (0), 0 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 16:32:58,934 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 348.0) internal successors, (32712), 94 states have internal predecessors, (32712), 0 states have call successors, (0), 0 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 16:32:58,934 INFO L175 Difference]: Start difference. First operand has 433 places, 2114 transitions, 19598 flow. Second operand 93 states and 12034 transitions. [2023-08-30 16:32:58,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 7971 transitions, 115651 flow [2023-08-30 16:36:49,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 7971 transitions, 112892 flow, removed 1378 selfloop flow, removed 1 redundant places. [2023-08-30 16:36:49,403 INFO L231 Difference]: Finished difference. Result has 603 places, 5767 transitions, 81300 flow [2023-08-30 16:36:49,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=18445, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=81300, PETRI_PLACES=603, PETRI_TRANSITIONS=5767} [2023-08-30 16:36:49,404 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 546 predicate places. [2023-08-30 16:36:49,405 INFO L495 AbstractCegarLoop]: Abstraction has has 603 places, 5767 transitions, 81300 flow [2023-08-30 16:36:49,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 105.29629629629629) internal successors, (2843), 27 states have internal predecessors, (2843), 0 states have call successors, (0), 0 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 16:36:49,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:36:49,405 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:36:49,410 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 16:36:49,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:36:49,606 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:36:49,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:36:49,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1817085427, now seen corresponding path program 1 times [2023-08-30 16:36:49,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:36:49,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036345986] [2023-08-30 16:36:49,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:36:49,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:36:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:36:49,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:36:49,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:36:49,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036345986] [2023-08-30 16:36:49,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036345986] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:36:49,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:36:49,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 16:36:49,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702072908] [2023-08-30 16:36:49,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:36:49,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 16:36:49,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:36:49,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 16:36:49,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-08-30 16:36:50,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 348 [2023-08-30 16:36:50,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 603 places, 5767 transitions, 81300 flow. Second operand has 11 states, 11 states have (on average 136.9090909090909) internal successors, (1506), 11 states have internal predecessors, (1506), 0 states have call successors, (0), 0 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 16:36:50,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:36:50,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 348 [2023-08-30 16:36:50,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand