./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-4.wvr.c --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/weaver/unroll-4.wvr.c -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 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e --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 21:52:12,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 21:52:12,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 21:52:12,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 21:52:12,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 21:52:12,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 21:52:12,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 21:52:12,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 21:52:12,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 21:52:12,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 21:52:12,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 21:52:12,666 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 21:52:12,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 21:52:12,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 21:52:12,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 21:52:12,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 21:52:12,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 21:52:12,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 21:52:12,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 21:52:12,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 21:52:12,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 21:52:12,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 21:52:12,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 21:52:12,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 21:52:12,682 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 21:52:12,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 21:52:12,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 21:52:12,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 21:52:12,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 21:52:12,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 21:52:12,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 21:52:12,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 21:52:12,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 21:52:12,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 21:52:12,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 21:52:12,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 21:52:12,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 21:52:12,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 21:52:12,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 21:52:12,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 21:52:12,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 21:52:12,698 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 21:52:12,719 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 21:52:12,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 21:52:12,721 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 21:52:12,721 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 21:52:12,721 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 21:52:12,721 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 21:52:12,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 21:52:12,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 21:52:12,722 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 21:52:12,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 21:52:12,723 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 21:52:12,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 21:52:12,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 21:52:12,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 21:52:12,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 21:52:12,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 21:52:12,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 21:52:12,724 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 21:52:12,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 21:52:12,724 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 21:52:12,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 21:52:12,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 21:52:12,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 21:52:12,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 21:52:12,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:52:12,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 21:52:12,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 21:52:12,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 21:52:12,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 21:52:12,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 21:52:12,726 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 21:52:12,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 21:52:12,726 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 21:52:12,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 21:52:12,727 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 21:52:12,727 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 21:52:12,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 21:52:13,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 21:52:13,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 21:52:13,006 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 21:52:13,006 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 21:52:13,008 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-4.wvr.c [2023-08-30 21:52:13,951 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 21:52:14,137 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 21:52:14,138 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-4.wvr.c [2023-08-30 21:52:14,145 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7da50506/8890d31290994ad69c725b0d02e88810/FLAG4eb926694 [2023-08-30 21:52:14,156 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7da50506/8890d31290994ad69c725b0d02e88810 [2023-08-30 21:52:14,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 21:52:14,158 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 21:52:14,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 21:52:14,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 21:52:14,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 21:52:14,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:52:14" (1/1) ... [2023-08-30 21:52:14,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71e05385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:52:14, skipping insertion in model container [2023-08-30 21:52:14,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:52:14" (1/1) ... [2023-08-30 21:52:14,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 21:52:14,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 21:52:14,318 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-4.wvr.c[2572,2585] [2023-08-30 21:52:14,327 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:52:14,333 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 21:52:14,360 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-4.wvr.c[2572,2585] [2023-08-30 21:52:14,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:52:14,374 INFO L208 MainTranslator]: Completed translation [2023-08-30 21:52:14,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:52:14 WrapperNode [2023-08-30 21:52:14,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 21:52:14,377 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 21:52:14,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 21:52:14,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 21:52:14,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:52:14" (1/1) ... [2023-08-30 21:52:14,398 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:52:14" (1/1) ... [2023-08-30 21:52:14,421 INFO L138 Inliner]: procedures = 24, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 157 [2023-08-30 21:52:14,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 21:52:14,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 21:52:14,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 21:52:14,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 21:52:14,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:52:14" (1/1) ... [2023-08-30 21:52:14,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:52:14" (1/1) ... [2023-08-30 21:52:14,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:52:14" (1/1) ... [2023-08-30 21:52:14,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:52:14" (1/1) ... [2023-08-30 21:52:14,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:52:14" (1/1) ... [2023-08-30 21:52:14,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:52:14" (1/1) ... [2023-08-30 21:52:14,457 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:52:14" (1/1) ... [2023-08-30 21:52:14,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:52:14" (1/1) ... [2023-08-30 21:52:14,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 21:52:14,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 21:52:14,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 21:52:14,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 21:52:14,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:52:14" (1/1) ... [2023-08-30 21:52:14,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:52:14,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:52:14,493 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 21:52:14,511 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 21:52:14,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 21:52:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 21:52:14,521 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 21:52:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 21:52:14,522 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 21:52:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 21:52:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 21:52:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 21:52:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 21:52:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 21:52:14,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 21:52:14,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 21:52:14,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 21:52:14,524 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 21:52:14,596 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 21:52:14,597 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 21:52:14,812 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 21:52:14,819 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 21:52:14,835 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 21:52:14,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:52:14 BoogieIcfgContainer [2023-08-30 21:52:14,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 21:52:14,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 21:52:14,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 21:52:14,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 21:52:14,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 09:52:14" (1/3) ... [2023-08-30 21:52:14,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69faef3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:52:14, skipping insertion in model container [2023-08-30 21:52:14,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:52:14" (2/3) ... [2023-08-30 21:52:14,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69faef3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:52:14, skipping insertion in model container [2023-08-30 21:52:14,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:52:14" (3/3) ... [2023-08-30 21:52:14,847 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2023-08-30 21:52:14,851 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 21:52:14,858 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 21:52:14,858 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 21:52:14,858 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 21:52:14,956 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 21:52:14,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 183 transitions, 382 flow [2023-08-30 21:52:15,092 INFO L130 PetriNetUnfolder]: 16/181 cut-off events. [2023-08-30 21:52:15,094 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:52:15,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 181 events. 16/181 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 163 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-08-30 21:52:15,100 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 183 transitions, 382 flow [2023-08-30 21:52:15,107 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 173 transitions, 358 flow [2023-08-30 21:52:15,110 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 21:52:15,120 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 173 transitions, 358 flow [2023-08-30 21:52:15,126 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 173 transitions, 358 flow [2023-08-30 21:52:15,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 173 transitions, 358 flow [2023-08-30 21:52:15,167 INFO L130 PetriNetUnfolder]: 16/173 cut-off events. [2023-08-30 21:52:15,168 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:52:15,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 173 events. 16/173 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 144 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-08-30 21:52:15,172 INFO L119 LiptonReduction]: Number of co-enabled transitions 3242 [2023-08-30 21:52:19,371 INFO L134 LiptonReduction]: Checked pairs total: 3238 [2023-08-30 21:52:19,371 INFO L136 LiptonReduction]: Total number of compositions: 210 [2023-08-30 21:52:19,387 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 21:52:19,393 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;@284f2f92, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 21:52:19,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 21:52:19,405 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-08-30 21:52:19,405 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:52:19,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:52:19,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:52:19,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:52:19,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:52:19,410 INFO L85 PathProgramCache]: Analyzing trace with hash 924236132, now seen corresponding path program 1 times [2023-08-30 21:52:19,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:52:19,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318263918] [2023-08-30 21:52:19,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:52:19,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:52:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:52:19,732 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 21:52:19,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:52:19,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318263918] [2023-08-30 21:52:19,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318263918] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:52:19,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:52:19,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 21:52:19,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560131576] [2023-08-30 21:52:19,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:52:19,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 21:52:19,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:52:19,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 21:52:19,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 21:52:19,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 393 [2023-08-30 21:52:19,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 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 21:52:19,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:52:19,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 393 [2023-08-30 21:52:19,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:52:19,837 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2023-08-30 21:52:19,837 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 21:52:19,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 84 events. 49/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 189 event pairs, 19 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2023-08-30 21:52:19,838 INFO L137 encePairwiseOnDemand]: 390/393 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-30 21:52:19,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-08-30 21:52:19,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 21:52:19,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 21:52:19,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2023-08-30 21:52:19,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42408821034775235 [2023-08-30 21:52:19,855 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2023-08-30 21:52:19,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2023-08-30 21:52:19,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:52:19,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2023-08-30 21:52:19,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 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 21:52:19,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 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 21:52:19,865 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 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 21:52:19,866 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 500 transitions. [2023-08-30 21:52:19,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-08-30 21:52:19,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 21:52:19,868 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-08-30 21:52:19,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-08-30 21:52:19,872 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-30 21:52:19,872 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-08-30 21:52:19,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 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 21:52:19,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:52:19,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:52:19,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 21:52:19,873 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:52:19,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:52:19,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1656557720, now seen corresponding path program 1 times [2023-08-30 21:52:19,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:52:19,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351903345] [2023-08-30 21:52:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:52:19,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:52:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:52:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:52:20,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:52:20,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351903345] [2023-08-30 21:52:20,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351903345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:52:20,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:52:20,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 21:52:20,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206788894] [2023-08-30 21:52:20,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:52:20,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 21:52:20,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:52:20,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 21:52:20,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 21:52:20,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 393 [2023-08-30 21:52:20,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 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 21:52:20,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:52:20,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 393 [2023-08-30 21:52:20,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:52:20,080 INFO L130 PetriNetUnfolder]: 66/117 cut-off events. [2023-08-30 21:52:20,081 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:52:20,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 117 events. 66/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 317 event pairs, 9 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-08-30 21:52:20,081 INFO L137 encePairwiseOnDemand]: 389/393 looper letters, 22 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2023-08-30 21:52:20,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 28 transitions, 125 flow [2023-08-30 21:52:20,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 21:52:20,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 21:52:20,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2023-08-30 21:52:20,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42408821034775235 [2023-08-30 21:52:20,083 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2023-08-30 21:52:20,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2023-08-30 21:52:20,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:52:20,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2023-08-30 21:52:20,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 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 21:52:20,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 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 21:52:20,088 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 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 21:52:20,088 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 500 transitions. [2023-08-30 21:52:20,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 28 transitions, 125 flow [2023-08-30 21:52:20,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 121 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 21:52:20,089 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2023-08-30 21:52:20,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-08-30 21:52:20,089 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-08-30 21:52:20,090 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2023-08-30 21:52:20,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 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 21:52:20,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:52:20,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:52:20,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 21:52:20,091 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:52:20,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:52:20,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1844840923, now seen corresponding path program 1 times [2023-08-30 21:52:20,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:52:20,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857081470] [2023-08-30 21:52:20,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:52:20,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:52:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:52:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:52:20,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:52:20,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857081470] [2023-08-30 21:52:20,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857081470] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:52:20,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:52:20,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:52:20,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412446409] [2023-08-30 21:52:20,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:52:20,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:52:20,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:52:20,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:52:20,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:52:20,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 393 [2023-08-30 21:52:20,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 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 21:52:20,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:52:20,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 393 [2023-08-30 21:52:20,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:52:20,239 INFO L130 PetriNetUnfolder]: 74/143 cut-off events. [2023-08-30 21:52:20,239 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-08-30 21:52:20,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 143 events. 74/143 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 469 event pairs, 15 based on Foata normal form. 8/150 useless extension candidates. Maximal degree in co-relation 330. Up to 83 conditions per place. [2023-08-30 21:52:20,240 INFO L137 encePairwiseOnDemand]: 389/393 looper letters, 29 selfloop transitions, 4 changer transitions 2/36 dead transitions. [2023-08-30 21:52:20,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 36 transitions, 180 flow [2023-08-30 21:52:20,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:52:20,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:52:20,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 664 transitions. [2023-08-30 21:52:20,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223918575063613 [2023-08-30 21:52:20,242 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 664 transitions. [2023-08-30 21:52:20,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 664 transitions. [2023-08-30 21:52:20,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:52:20,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 664 transitions. [2023-08-30 21:52:20,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 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 21:52:20,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 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 21:52:20,247 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 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 21:52:20,247 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 4 states and 664 transitions. [2023-08-30 21:52:20,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 36 transitions, 180 flow [2023-08-30 21:52:20,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 36 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:52:20,248 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 89 flow [2023-08-30 21:52:20,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-08-30 21:52:20,248 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-08-30 21:52:20,249 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 89 flow [2023-08-30 21:52:20,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 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 21:52:20,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:52:20,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:52:20,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 21:52:20,250 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:52:20,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:52:20,250 INFO L85 PathProgramCache]: Analyzing trace with hash -338318067, now seen corresponding path program 1 times [2023-08-30 21:52:20,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:52:20,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667699987] [2023-08-30 21:52:20,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:52:20,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:52:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:52:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:52:20,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:52:20,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667699987] [2023-08-30 21:52:20,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667699987] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:52:20,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:52:20,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:52:20,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882988169] [2023-08-30 21:52:20,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:52:20,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:52:20,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:52:20,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:52:20,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:52:20,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 393 [2023-08-30 21:52:20,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 155.2) internal successors, (776), 5 states have internal predecessors, (776), 0 states have call successors, (0), 0 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 21:52:20,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:52:20,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 393 [2023-08-30 21:52:20,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:52:20,496 INFO L130 PetriNetUnfolder]: 93/182 cut-off events. [2023-08-30 21:52:20,496 INFO L131 PetriNetUnfolder]: For 119/119 co-relation queries the response was YES. [2023-08-30 21:52:20,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 182 events. 93/182 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 615 event pairs, 26 based on Foata normal form. 2/183 useless extension candidates. Maximal degree in co-relation 506. Up to 89 conditions per place. [2023-08-30 21:52:20,501 INFO L137 encePairwiseOnDemand]: 387/393 looper letters, 31 selfloop transitions, 7 changer transitions 11/49 dead transitions. [2023-08-30 21:52:20,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 49 transitions, 274 flow [2023-08-30 21:52:20,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:52:20,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:52:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 958 transitions. [2023-08-30 21:52:20,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40627650551314676 [2023-08-30 21:52:20,519 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 958 transitions. [2023-08-30 21:52:20,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 958 transitions. [2023-08-30 21:52:20,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:52:20,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 958 transitions. [2023-08-30 21:52:20,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.66666666666666) internal successors, (958), 6 states have internal predecessors, (958), 0 states have call successors, (0), 0 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 21:52:20,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 393.0) internal successors, (2751), 7 states have internal predecessors, (2751), 0 states have call successors, (0), 0 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 21:52:20,529 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 393.0) internal successors, (2751), 7 states have internal predecessors, (2751), 0 states have call successors, (0), 0 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 21:52:20,529 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 89 flow. Second operand 6 states and 958 transitions. [2023-08-30 21:52:20,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 49 transitions, 274 flow [2023-08-30 21:52:20,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 49 transitions, 264 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 21:52:20,532 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 126 flow [2023-08-30 21:52:20,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-08-30 21:52:20,534 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 12 predicate places. [2023-08-30 21:52:20,534 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 126 flow [2023-08-30 21:52:20,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 155.2) internal successors, (776), 5 states have internal predecessors, (776), 0 states have call successors, (0), 0 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 21:52:20,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:52:20,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:52:20,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 21:52:20,535 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:52:20,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:52:20,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1252150367, now seen corresponding path program 2 times [2023-08-30 21:52:20,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:52:20,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045275988] [2023-08-30 21:52:20,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:52:20,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:52:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:52:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:52:20,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:52:20,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045275988] [2023-08-30 21:52:20,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045275988] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:52:20,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458558020] [2023-08-30 21:52:20,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:52:20,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:52:20,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:52:20,642 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 21:52:20,643 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 21:52:20,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:52:20,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:52:20,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 21:52:20,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:52:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:52:20,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:52:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:52:20,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458558020] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:52:20,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:52:20,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 7 [2023-08-30 21:52:20,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019896969] [2023-08-30 21:52:20,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:52:20,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:52:20,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:52:20,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:52:20,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-30 21:52:20,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 393 [2023-08-30 21:52:20,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 21:52:20,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:52:20,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 393 [2023-08-30 21:52:20,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:52:20,966 INFO L130 PetriNetUnfolder]: 85/163 cut-off events. [2023-08-30 21:52:20,966 INFO L131 PetriNetUnfolder]: For 248/261 co-relation queries the response was YES. [2023-08-30 21:52:20,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 163 events. 85/163 cut-off events. For 248/261 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 501 event pairs, 16 based on Foata normal form. 19/179 useless extension candidates. Maximal degree in co-relation 561. Up to 106 conditions per place. [2023-08-30 21:52:20,967 INFO L137 encePairwiseOnDemand]: 389/393 looper letters, 29 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2023-08-30 21:52:20,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 262 flow [2023-08-30 21:52:20,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:52:20,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:52:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 654 transitions. [2023-08-30 21:52:20,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41603053435114506 [2023-08-30 21:52:20,969 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 654 transitions. [2023-08-30 21:52:20,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 654 transitions. [2023-08-30 21:52:20,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:52:20,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 654 transitions. [2023-08-30 21:52:20,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 163.5) internal successors, (654), 4 states have internal predecessors, (654), 0 states have call successors, (0), 0 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 21:52:20,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 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 21:52:20,974 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 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 21:52:20,974 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 126 flow. Second operand 4 states and 654 transitions. [2023-08-30 21:52:20,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 262 flow [2023-08-30 21:52:20,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 40 transitions, 248 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 21:52:20,976 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 151 flow [2023-08-30 21:52:20,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-08-30 21:52:20,976 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-08-30 21:52:20,977 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 151 flow [2023-08-30 21:52:20,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 21:52:20,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:52:20,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:52:20,987 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 21:52:21,182 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 21:52:21,182 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:52:21,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:52:21,183 INFO L85 PathProgramCache]: Analyzing trace with hash 906879297, now seen corresponding path program 3 times [2023-08-30 21:52:21,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:52:21,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872413646] [2023-08-30 21:52:21,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:52:21,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:52:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:52:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:52:21,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:52:21,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872413646] [2023-08-30 21:52:21,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872413646] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:52:21,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:52:21,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:52:21,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786115593] [2023-08-30 21:52:21,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:52:21,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:52:21,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:52:21,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:52:21,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:52:21,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 393 [2023-08-30 21:52:21,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 0 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 21:52:21,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:52:21,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 393 [2023-08-30 21:52:21,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:52:21,383 INFO L130 PetriNetUnfolder]: 102/207 cut-off events. [2023-08-30 21:52:21,384 INFO L131 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2023-08-30 21:52:21,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 207 events. 102/207 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 714 event pairs, 36 based on Foata normal form. 6/212 useless extension candidates. Maximal degree in co-relation 737. Up to 129 conditions per place. [2023-08-30 21:52:21,385 INFO L137 encePairwiseOnDemand]: 388/393 looper letters, 34 selfloop transitions, 8 changer transitions 8/50 dead transitions. [2023-08-30 21:52:21,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 355 flow [2023-08-30 21:52:21,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:52:21,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:52:21,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 804 transitions. [2023-08-30 21:52:21,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40916030534351144 [2023-08-30 21:52:21,388 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 804 transitions. [2023-08-30 21:52:21,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 804 transitions. [2023-08-30 21:52:21,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:52:21,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 804 transitions. [2023-08-30 21:52:21,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.8) internal successors, (804), 5 states have internal predecessors, (804), 0 states have call successors, (0), 0 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 21:52:21,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 393.0) internal successors, (2358), 6 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:52:21,395 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 393.0) internal successors, (2358), 6 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:52:21,396 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 151 flow. Second operand 5 states and 804 transitions. [2023-08-30 21:52:21,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 355 flow [2023-08-30 21:52:21,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 50 transitions, 346 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 21:52:21,400 INFO L231 Difference]: Finished difference. Result has 41 places, 29 transitions, 194 flow [2023-08-30 21:52:21,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=41, PETRI_TRANSITIONS=29} [2023-08-30 21:52:21,403 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-08-30 21:52:21,403 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 29 transitions, 194 flow [2023-08-30 21:52:21,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 0 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 21:52:21,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:52:21,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:52:21,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 21:52:21,404 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:52:21,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:52:21,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1096563895, now seen corresponding path program 2 times [2023-08-30 21:52:21,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:52:21,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518931224] [2023-08-30 21:52:21,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:52:21,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:52:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:52:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:52:21,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:52:21,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518931224] [2023-08-30 21:52:21,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518931224] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:52:21,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:52:21,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:52:21,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798532688] [2023-08-30 21:52:21,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:52:21,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:52:21,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:52:21,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:52:21,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:52:21,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 393 [2023-08-30 21:52:21,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 29 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 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 21:52:21,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:52:21,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 393 [2023-08-30 21:52:21,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:52:21,540 INFO L130 PetriNetUnfolder]: 96/192 cut-off events. [2023-08-30 21:52:21,540 INFO L131 PetriNetUnfolder]: For 597/607 co-relation queries the response was YES. [2023-08-30 21:52:21,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 192 events. 96/192 cut-off events. For 597/607 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 643 event pairs, 31 based on Foata normal form. 13/199 useless extension candidates. Maximal degree in co-relation 800. Up to 130 conditions per place. [2023-08-30 21:52:21,542 INFO L137 encePairwiseOnDemand]: 389/393 looper letters, 28 selfloop transitions, 6 changer transitions 5/42 dead transitions. [2023-08-30 21:52:21,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 338 flow [2023-08-30 21:52:21,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:52:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:52:21,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 664 transitions. [2023-08-30 21:52:21,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223918575063613 [2023-08-30 21:52:21,544 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 664 transitions. [2023-08-30 21:52:21,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 664 transitions. [2023-08-30 21:52:21,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:52:21,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 664 transitions. [2023-08-30 21:52:21,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 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 21:52:21,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 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 21:52:21,547 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 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 21:52:21,548 INFO L175 Difference]: Start difference. First operand has 41 places, 29 transitions, 194 flow. Second operand 4 states and 664 transitions. [2023-08-30 21:52:21,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 338 flow [2023-08-30 21:52:21,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 313 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-30 21:52:21,550 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 213 flow [2023-08-30 21:52:21,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2023-08-30 21:52:21,550 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-08-30 21:52:21,551 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 213 flow [2023-08-30 21:52:21,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 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 21:52:21,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:52:21,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:52:21,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 21:52:21,551 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:52:21,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:52:21,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1118128293, now seen corresponding path program 4 times [2023-08-30 21:52:21,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:52:21,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230162355] [2023-08-30 21:52:21,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:52:21,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:52:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:52:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:52:21,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:52:21,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230162355] [2023-08-30 21:52:21,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230162355] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:52:21,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806428720] [2023-08-30 21:52:21,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:52:21,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:52:21,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:52:21,629 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 21:52:21,631 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 21:52:21,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:52:21,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:52:21,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 21:52:21,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:52:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:52:21,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:52:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:52:21,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806428720] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:52:21,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:52:21,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-08-30 21:52:21,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105806506] [2023-08-30 21:52:21,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:52:21,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 21:52:21,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:52:21,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 21:52:21,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-30 21:52:21,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 393 [2023-08-30 21:52:21,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 213 flow. Second operand has 10 states, 10 states have (on average 154.8) internal successors, (1548), 10 states have internal predecessors, (1548), 0 states have call successors, (0), 0 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 21:52:21,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:52:21,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 393 [2023-08-30 21:52:21,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:52:22,035 INFO L130 PetriNetUnfolder]: 125/231 cut-off events. [2023-08-30 21:52:22,036 INFO L131 PetriNetUnfolder]: For 749/749 co-relation queries the response was YES. [2023-08-30 21:52:22,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984 conditions, 231 events. 125/231 cut-off events. For 749/749 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 767 event pairs, 20 based on Foata normal form. 24/254 useless extension candidates. Maximal degree in co-relation 956. Up to 92 conditions per place. [2023-08-30 21:52:22,037 INFO L137 encePairwiseOnDemand]: 387/393 looper letters, 39 selfloop transitions, 25 changer transitions 9/73 dead transitions. [2023-08-30 21:52:22,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 582 flow [2023-08-30 21:52:22,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 21:52:22,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 21:52:22,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1436 transitions. [2023-08-30 21:52:22,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059937800395816 [2023-08-30 21:52:22,041 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1436 transitions. [2023-08-30 21:52:22,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1436 transitions. [2023-08-30 21:52:22,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:52:22,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1436 transitions. [2023-08-30 21:52:22,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 159.55555555555554) internal successors, (1436), 9 states have internal predecessors, (1436), 0 states have call successors, (0), 0 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 21:52:22,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 393.0) internal successors, (3930), 10 states have internal predecessors, (3930), 0 states have call successors, (0), 0 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 21:52:22,049 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 393.0) internal successors, (3930), 10 states have internal predecessors, (3930), 0 states have call successors, (0), 0 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 21:52:22,049 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 213 flow. Second operand 9 states and 1436 transitions. [2023-08-30 21:52:22,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 582 flow [2023-08-30 21:52:22,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 73 transitions, 560 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 21:52:22,052 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 373 flow [2023-08-30 21:52:22,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=373, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2023-08-30 21:52:22,052 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 32 predicate places. [2023-08-30 21:52:22,052 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 373 flow [2023-08-30 21:52:22,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 154.8) internal successors, (1548), 10 states have internal predecessors, (1548), 0 states have call successors, (0), 0 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 21:52:22,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:52:22,053 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 21:52:22,063 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 21:52:22,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-08-30 21:52:22,258 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:52:22,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:52:22,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1249714855, now seen corresponding path program 1 times [2023-08-30 21:52:22,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:52:22,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115136081] [2023-08-30 21:52:22,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:52:22,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:52:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:52:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:52:22,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:52:22,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115136081] [2023-08-30 21:52:22,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115136081] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:52:22,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591355716] [2023-08-30 21:52:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:52:22,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:52:22,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:52:22,409 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 21:52:22,425 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 21:52:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:52:22,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 21:52:22,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:52:22,539 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 15 treesize of output 11 [2023-08-30 21:52:22,565 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 6 treesize of output 5 [2023-08-30 21:52:22,582 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 6 treesize of output 5 [2023-08-30 21:52:22,714 INFO L321 Elim1Store]: treesize reduction 37, result has 64.8 percent of original size [2023-08-30 21:52:22,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 101 treesize of output 101 [2023-08-30 21:52:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:52:22,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:52:23,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:52:23,491 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 296 treesize of output 176 [2023-08-30 21:52:23,545 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:52:23,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 852 treesize of output 804 [2023-08-30 21:52:23,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:52:23,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 163 treesize of output 228 [2023-08-30 21:52:23,711 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:52:23,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 259 treesize of output 225 [2023-08-30 21:52:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:52:27,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591355716] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:52:27,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:52:27,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2023-08-30 21:52:27,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057287659] [2023-08-30 21:52:27,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:52:27,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 21:52:27,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:52:27,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 21:52:27,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=186, Unknown=4, NotChecked=0, Total=240 [2023-08-30 21:52:29,084 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 21:52:31,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:52:33,190 WARN L539 Checker$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 21:52:35,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:52:36,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:52:37,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:52:39,826 WARN L539 Checker$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 21:52:41,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:52:43,708 WARN L539 Checker$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 21:52:45,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:52:47,855 WARN L539 Checker$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 21:52:49,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:52:51,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:52:55,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:52:57,261 WARN L539 Checker$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 21:52:59,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:53:01,398 WARN L539 Checker$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 21:53:03,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:53:04,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:53:07,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:53:09,112 WARN L539 Checker$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 21:53:11,175 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 21:53:11,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 393 [2023-08-30 21:53:11,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 373 flow. Second operand has 16 states, 16 states have (on average 107.75) internal successors, (1724), 16 states have internal predecessors, (1724), 0 states have call successors, (0), 0 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 21:53:11,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:53:11,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 393 [2023-08-30 21:53:11,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:53:12,001 INFO L130 PetriNetUnfolder]: 275/487 cut-off events. [2023-08-30 21:53:12,002 INFO L131 PetriNetUnfolder]: For 1576/1596 co-relation queries the response was YES. [2023-08-30 21:53:12,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2351 conditions, 487 events. 275/487 cut-off events. For 1576/1596 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1896 event pairs, 8 based on Foata normal form. 38/517 useless extension candidates. Maximal degree in co-relation 1976. Up to 249 conditions per place. [2023-08-30 21:53:12,005 INFO L137 encePairwiseOnDemand]: 385/393 looper letters, 75 selfloop transitions, 35 changer transitions 43/157 dead transitions. [2023-08-30 21:53:12,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 157 transitions, 1394 flow [2023-08-30 21:53:12,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 21:53:12,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 21:53:12,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2540 transitions. [2023-08-30 21:53:12,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2810045358999889 [2023-08-30 21:53:12,012 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2540 transitions. [2023-08-30 21:53:12,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2540 transitions. [2023-08-30 21:53:12,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:53:12,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2540 transitions. [2023-08-30 21:53:12,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 110.43478260869566) internal successors, (2540), 23 states have internal predecessors, (2540), 0 states have call successors, (0), 0 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 21:53:12,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 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 21:53:12,027 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 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 21:53:12,027 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 373 flow. Second operand 23 states and 2540 transitions. [2023-08-30 21:53:12,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 157 transitions, 1394 flow [2023-08-30 21:53:12,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 157 transitions, 1201 flow, removed 74 selfloop flow, removed 5 redundant places. [2023-08-30 21:53:12,036 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 573 flow [2023-08-30 21:53:12,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=573, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-08-30 21:53:12,037 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2023-08-30 21:53:12,037 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 573 flow [2023-08-30 21:53:12,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 107.75) internal successors, (1724), 16 states have internal predecessors, (1724), 0 states have call successors, (0), 0 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 21:53:12,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:53:12,038 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:53:12,052 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 21:53:12,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:53:12,243 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:53:12,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:53:12,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1302241712, now seen corresponding path program 2 times [2023-08-30 21:53:12,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:53:12,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716866901] [2023-08-30 21:53:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:53:12,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:53:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:53:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:53:12,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:53:12,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716866901] [2023-08-30 21:53:12,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716866901] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:53:12,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531990932] [2023-08-30 21:53:12,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:53:12,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:53:12,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:53:12,385 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 21:53:12,387 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 21:53:12,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:53:12,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:53:12,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 21:53:12,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:53:12,511 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 15 treesize of output 11 [2023-08-30 21:53:12,537 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 6 treesize of output 5 [2023-08-30 21:53:12,553 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 6 treesize of output 5 [2023-08-30 21:53:12,684 INFO L321 Elim1Store]: treesize reduction 41, result has 61.0 percent of original size [2023-08-30 21:53:12,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 101 treesize of output 97 [2023-08-30 21:53:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:53:12,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:53:13,136 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_216 (Array Int Int)) (~x1~0 Int) (~x2~0 Int)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_216) c_~f~0.base))) (let ((.cse1 (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* ~x2~0 4))) 4))) 4))))) (or (= (select .cse0 (+ (* ~x1~0 4) c_~f~0.offset)) (select .cse0 (+ c_~f~0.offset (* .cse1 4)))) (<= c_~size~0 .cse1) (< ~x1~0 0) (<= c_~size~0 ~x1~0) (< .cse1 0))))) is different from false [2023-08-30 21:53:13,219 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:53:13,219 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 296 treesize of output 176 [2023-08-30 21:53:13,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:53:13,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 852 treesize of output 804 [2023-08-30 21:53:13,344 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:53:13,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 163 treesize of output 228 [2023-08-30 21:53:13,434 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:53:13,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 259 treesize of output 225 [2023-08-30 21:53:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:53:16,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531990932] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:53:16,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:53:16,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-30 21:53:16,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951402294] [2023-08-30 21:53:16,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:53:16,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 21:53:16,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:53:16,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 21:53:16,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=193, Unknown=1, NotChecked=28, Total=272 [2023-08-30 21:53:16,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 393 [2023-08-30 21:53:16,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 573 flow. Second operand has 17 states, 17 states have (on average 107.88235294117646) internal successors, (1834), 17 states have internal predecessors, (1834), 0 states have call successors, (0), 0 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 21:53:16,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:53:16,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 393 [2023-08-30 21:53:16,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:53:17,280 INFO L130 PetriNetUnfolder]: 225/419 cut-off events. [2023-08-30 21:53:17,281 INFO L131 PetriNetUnfolder]: For 1945/1964 co-relation queries the response was YES. [2023-08-30 21:53:17,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2236 conditions, 419 events. 225/419 cut-off events. For 1945/1964 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1645 event pairs, 4 based on Foata normal form. 43/460 useless extension candidates. Maximal degree in co-relation 2208. Up to 141 conditions per place. [2023-08-30 21:53:17,283 INFO L137 encePairwiseOnDemand]: 385/393 looper letters, 53 selfloop transitions, 24 changer transitions 55/136 dead transitions. [2023-08-30 21:53:17,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 136 transitions, 1265 flow [2023-08-30 21:53:17,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 21:53:17,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 21:53:17,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2094 transitions. [2023-08-30 21:53:17,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2804339092004821 [2023-08-30 21:53:17,296 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2094 transitions. [2023-08-30 21:53:17,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2094 transitions. [2023-08-30 21:53:17,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:53:17,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2094 transitions. [2023-08-30 21:53:17,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 110.21052631578948) internal successors, (2094), 19 states have internal predecessors, (2094), 0 states have call successors, (0), 0 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 21:53:17,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 393.0) internal successors, (7860), 20 states have internal predecessors, (7860), 0 states have call successors, (0), 0 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 21:53:17,307 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 393.0) internal successors, (7860), 20 states have internal predecessors, (7860), 0 states have call successors, (0), 0 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 21:53:17,307 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 573 flow. Second operand 19 states and 2094 transitions. [2023-08-30 21:53:17,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 136 transitions, 1265 flow [2023-08-30 21:53:17,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 136 transitions, 1158 flow, removed 39 selfloop flow, removed 7 redundant places. [2023-08-30 21:53:17,315 INFO L231 Difference]: Finished difference. Result has 84 places, 49 transitions, 471 flow [2023-08-30 21:53:17,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=471, PETRI_PLACES=84, PETRI_TRANSITIONS=49} [2023-08-30 21:53:17,316 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 63 predicate places. [2023-08-30 21:53:17,316 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 49 transitions, 471 flow [2023-08-30 21:53:17,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 107.88235294117646) internal successors, (1834), 17 states have internal predecessors, (1834), 0 states have call successors, (0), 0 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 21:53:17,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:53:17,317 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:53:17,325 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 21:53:17,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:53:17,522 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:53:17,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:53:17,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1189533459, now seen corresponding path program 3 times [2023-08-30 21:53:17,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:53:17,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781175209] [2023-08-30 21:53:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:53:17,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:53:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:53:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:53:19,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:53:19,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781175209] [2023-08-30 21:53:19,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781175209] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:53:19,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179612054] [2023-08-30 21:53:19,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:53:19,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:53:19,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:53:19,753 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 21:53:19,755 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 21:53:20,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 21:53:20,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:53:20,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 21:53:20,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:53:20,186 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 21:53:20,232 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 6 treesize of output 5 [2023-08-30 21:53:20,267 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 6 treesize of output 5 [2023-08-30 21:53:20,499 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:53:20,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 76 [2023-08-30 21:53:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:53:20,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:53:20,901 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:53:20,901 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 374 treesize of output 218 [2023-08-30 21:53:21,264 INFO L321 Elim1Store]: treesize reduction 5, result has 98.2 percent of original size [2023-08-30 21:53:21,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 488 treesize of output 691 [2023-08-30 21:53:21,735 INFO L321 Elim1Store]: treesize reduction 8, result has 97.1 percent of original size [2023-08-30 21:53:21,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 376 treesize of output 520 [2023-08-30 21:53:22,210 INFO L321 Elim1Store]: treesize reduction 8, result has 97.1 percent of original size [2023-08-30 21:53:22,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 145 treesize of output 373 [2023-08-30 21:53:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:53:43,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179612054] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:53:43,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:53:43,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-30 21:53:43,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325365504] [2023-08-30 21:53:43,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:53:43,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 21:53:43,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:53:43,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 21:53:43,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=747, Unknown=3, NotChecked=0, Total=870 [2023-08-30 21:53:45,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:53:47,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:53:50,050 WARN L539 Checker$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 21:53:50,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-08-30 21:53:50,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 49 transitions, 471 flow. Second operand has 30 states, 30 states have (on average 116.5) internal successors, (3495), 30 states have internal predecessors, (3495), 0 states have call successors, (0), 0 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 21:53:50,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:53:50,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-08-30 21:53:50,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:53:59,204 WARN L222 SmtUtils]: Spent 8.19s on a formula simplification. DAG size of input: 96 DAG size of output: 89 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:54:01,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:54:02,821 INFO L130 PetriNetUnfolder]: 501/889 cut-off events. [2023-08-30 21:54:02,821 INFO L131 PetriNetUnfolder]: For 3648/3688 co-relation queries the response was YES. [2023-08-30 21:54:02,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4649 conditions, 889 events. 501/889 cut-off events. For 3648/3688 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3794 event pairs, 30 based on Foata normal form. 40/919 useless extension candidates. Maximal degree in co-relation 4596. Up to 356 conditions per place. [2023-08-30 21:54:02,827 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 125 selfloop transitions, 75 changer transitions 13/220 dead transitions. [2023-08-30 21:54:02,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 220 transitions, 2194 flow [2023-08-30 21:54:02,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 21:54:02,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 21:54:02,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2922 transitions. [2023-08-30 21:54:02,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3097964376590331 [2023-08-30 21:54:02,834 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2922 transitions. [2023-08-30 21:54:02,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2922 transitions. [2023-08-30 21:54:02,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:54:02,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2922 transitions. [2023-08-30 21:54:02,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 121.75) internal successors, (2922), 24 states have internal predecessors, (2922), 0 states have call successors, (0), 0 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 21:54:02,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 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 21:54:02,852 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 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 21:54:02,853 INFO L175 Difference]: Start difference. First operand has 84 places, 49 transitions, 471 flow. Second operand 24 states and 2922 transitions. [2023-08-30 21:54:02,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 220 transitions, 2194 flow [2023-08-30 21:54:02,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 220 transitions, 1859 flow, removed 101 selfloop flow, removed 16 redundant places. [2023-08-30 21:54:02,883 INFO L231 Difference]: Finished difference. Result has 86 places, 120 transitions, 1292 flow [2023-08-30 21:54:02,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1292, PETRI_PLACES=86, PETRI_TRANSITIONS=120} [2023-08-30 21:54:02,884 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-08-30 21:54:02,884 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 120 transitions, 1292 flow [2023-08-30 21:54:02,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 116.5) internal successors, (3495), 30 states have internal predecessors, (3495), 0 states have call successors, (0), 0 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 21:54:02,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:54:02,885 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:54:02,891 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 21:54:03,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-30 21:54:03,090 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:54:03,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:54:03,091 INFO L85 PathProgramCache]: Analyzing trace with hash -948692765, now seen corresponding path program 4 times [2023-08-30 21:54:03,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:54:03,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180762577] [2023-08-30 21:54:03,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:54:03,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:54:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:54:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:54:05,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:54:05,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180762577] [2023-08-30 21:54:05,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180762577] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:54:05,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027984201] [2023-08-30 21:54:05,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:54:05,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:54:05,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:54:05,488 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 21:54:05,513 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 21:54:05,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:54:05,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:54:05,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 21:54:05,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:54:05,781 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:54:05,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-08-30 21:54:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:54:05,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:54:06,271 INFO L321 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-08-30 21:54:06,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-08-30 21:54:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 21:54:07,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027984201] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:54:07,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:54:07,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 21 [2023-08-30 21:54:07,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224191780] [2023-08-30 21:54:07,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:54:07,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 21:54:07,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:54:07,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 21:54:07,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-08-30 21:54:09,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 393 [2023-08-30 21:54:09,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 120 transitions, 1292 flow. Second operand has 23 states, 23 states have (on average 141.91304347826087) internal successors, (3264), 23 states have internal predecessors, (3264), 0 states have call successors, (0), 0 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 21:54:09,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:54:09,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 393 [2023-08-30 21:54:09,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:54:10,670 INFO L130 PetriNetUnfolder]: 909/1626 cut-off events. [2023-08-30 21:54:10,671 INFO L131 PetriNetUnfolder]: For 6238/6288 co-relation queries the response was YES. [2023-08-30 21:54:10,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8266 conditions, 1626 events. 909/1626 cut-off events. For 6238/6288 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8215 event pairs, 146 based on Foata normal form. 46/1658 useless extension candidates. Maximal degree in co-relation 7649. Up to 856 conditions per place. [2023-08-30 21:54:10,684 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 159 selfloop transitions, 113 changer transitions 7/286 dead transitions. [2023-08-30 21:54:10,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 286 transitions, 3146 flow [2023-08-30 21:54:10,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 21:54:10,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 21:54:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3368 transitions. [2023-08-30 21:54:10,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37260758933510346 [2023-08-30 21:54:10,688 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3368 transitions. [2023-08-30 21:54:10,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3368 transitions. [2023-08-30 21:54:10,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:54:10,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3368 transitions. [2023-08-30 21:54:10,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 146.43478260869566) internal successors, (3368), 23 states have internal predecessors, (3368), 0 states have call successors, (0), 0 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 21:54:10,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 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 21:54:10,700 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 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 21:54:10,700 INFO L175 Difference]: Start difference. First operand has 86 places, 120 transitions, 1292 flow. Second operand 23 states and 3368 transitions. [2023-08-30 21:54:10,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 286 transitions, 3146 flow [2023-08-30 21:54:10,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 286 transitions, 2902 flow, removed 120 selfloop flow, removed 2 redundant places. [2023-08-30 21:54:10,721 INFO L231 Difference]: Finished difference. Result has 111 places, 204 transitions, 2299 flow [2023-08-30 21:54:10,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2299, PETRI_PLACES=111, PETRI_TRANSITIONS=204} [2023-08-30 21:54:10,722 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 90 predicate places. [2023-08-30 21:54:10,723 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 204 transitions, 2299 flow [2023-08-30 21:54:10,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 141.91304347826087) internal successors, (3264), 23 states have internal predecessors, (3264), 0 states have call successors, (0), 0 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 21:54:10,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:54:10,724 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:54:10,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 21:54:10,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:54:10,929 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:54:10,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:54:10,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1651791961, now seen corresponding path program 5 times [2023-08-30 21:54:10,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:54:10,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244767505] [2023-08-30 21:54:10,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:54:10,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:54:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:54:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:54:12,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:54:12,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244767505] [2023-08-30 21:54:12,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244767505] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:54:12,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119064730] [2023-08-30 21:54:12,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:54:12,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:54:12,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:54:12,900 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 21:54:12,902 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 21:54:13,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 21:54:13,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:54:13,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 21:54:13,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:54:13,230 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:54:13,306 INFO L321 Elim1Store]: treesize reduction 169, result has 27.2 percent of original size [2023-08-30 21:54:13,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 99 [2023-08-30 21:54:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:54:13,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:54:13,756 INFO L321 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-08-30 21:54:13,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-08-30 21:54:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:54:14,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119064730] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:54:14,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:54:14,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 22 [2023-08-30 21:54:14,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450065984] [2023-08-30 21:54:14,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:54:14,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 21:54:14,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:54:14,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 21:54:14,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2023-08-30 21:54:16,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 393 [2023-08-30 21:54:16,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 204 transitions, 2299 flow. Second operand has 24 states, 24 states have (on average 142.91666666666666) internal successors, (3430), 24 states have internal predecessors, (3430), 0 states have call successors, (0), 0 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 21:54:16,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:54:16,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 393 [2023-08-30 21:54:16,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:54:18,404 INFO L130 PetriNetUnfolder]: 1453/2617 cut-off events. [2023-08-30 21:54:18,404 INFO L131 PetriNetUnfolder]: For 11165/11209 co-relation queries the response was YES. [2023-08-30 21:54:18,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13312 conditions, 2617 events. 1453/2617 cut-off events. For 11165/11209 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15181 event pairs, 242 based on Foata normal form. 39/2644 useless extension candidates. Maximal degree in co-relation 12505. Up to 1581 conditions per place. [2023-08-30 21:54:18,423 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 209 selfloop transitions, 137 changer transitions 5/358 dead transitions. [2023-08-30 21:54:18,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 358 transitions, 4361 flow [2023-08-30 21:54:18,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 21:54:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 21:54:18,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3528 transitions. [2023-08-30 21:54:18,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37404580152671757 [2023-08-30 21:54:18,427 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3528 transitions. [2023-08-30 21:54:18,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3528 transitions. [2023-08-30 21:54:18,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:54:18,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3528 transitions. [2023-08-30 21:54:18,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 147.0) internal successors, (3528), 24 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:18,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 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 21:54:18,439 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 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 21:54:18,439 INFO L175 Difference]: Start difference. First operand has 111 places, 204 transitions, 2299 flow. Second operand 24 states and 3528 transitions. [2023-08-30 21:54:18,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 358 transitions, 4361 flow [2023-08-30 21:54:18,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 358 transitions, 4059 flow, removed 136 selfloop flow, removed 6 redundant places. [2023-08-30 21:54:18,473 INFO L231 Difference]: Finished difference. Result has 134 places, 281 transitions, 3428 flow [2023-08-30 21:54:18,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3428, PETRI_PLACES=134, PETRI_TRANSITIONS=281} [2023-08-30 21:54:18,474 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 113 predicate places. [2023-08-30 21:54:18,474 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 281 transitions, 3428 flow [2023-08-30 21:54:18,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 142.91666666666666) internal successors, (3430), 24 states have internal predecessors, (3430), 0 states have call successors, (0), 0 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 21:54:18,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:54:18,475 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:54:18,481 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 21:54:18,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:54:18,680 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:54:18,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:54:18,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1515982353, now seen corresponding path program 6 times [2023-08-30 21:54:18,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:54:18,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072155506] [2023-08-30 21:54:18,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:54:18,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:54:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:54:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:54:20,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:54:20,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072155506] [2023-08-30 21:54:20,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072155506] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:54:20,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827033534] [2023-08-30 21:54:20,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:54:20,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:54:20,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:54:20,525 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:54:20,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 21:54:20,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:54:20,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:54:20,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 21:54:20,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:54:20,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:54:20,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-08-30 21:54:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:54:20,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:54:21,298 INFO L321 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-08-30 21:54:21,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-08-30 21:54:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 21:54:22,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827033534] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:54:22,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:54:22,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 21 [2023-08-30 21:54:22,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113200240] [2023-08-30 21:54:22,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:54:22,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 21:54:22,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:54:22,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 21:54:22,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2023-08-30 21:54:24,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 393 [2023-08-30 21:54:24,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 281 transitions, 3428 flow. Second operand has 23 states, 23 states have (on average 142.91304347826087) internal successors, (3287), 23 states have internal predecessors, (3287), 0 states have call successors, (0), 0 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 21:54:24,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:54:24,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 393 [2023-08-30 21:54:24,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:54:25,778 INFO L130 PetriNetUnfolder]: 2041/3680 cut-off events. [2023-08-30 21:54:25,778 INFO L131 PetriNetUnfolder]: For 17681/17723 co-relation queries the response was YES. [2023-08-30 21:54:25,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19305 conditions, 3680 events. 2041/3680 cut-off events. For 17681/17723 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 23391 event pairs, 440 based on Foata normal form. 40/3708 useless extension candidates. Maximal degree in co-relation 18042. Up to 2503 conditions per place. [2023-08-30 21:54:25,800 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 282 selfloop transitions, 153 changer transitions 9/451 dead transitions. [2023-08-30 21:54:25,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 451 transitions, 5965 flow [2023-08-30 21:54:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 21:54:25,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 21:54:25,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3520 transitions. [2023-08-30 21:54:25,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37319762510602206 [2023-08-30 21:54:25,804 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3520 transitions. [2023-08-30 21:54:25,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3520 transitions. [2023-08-30 21:54:25,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:54:25,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3520 transitions. [2023-08-30 21:54:25,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 146.66666666666666) internal successors, (3520), 24 states have internal predecessors, (3520), 0 states have call successors, (0), 0 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 21:54:25,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 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 21:54:25,812 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 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 21:54:25,812 INFO L175 Difference]: Start difference. First operand has 134 places, 281 transitions, 3428 flow. Second operand 24 states and 3520 transitions. [2023-08-30 21:54:25,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 451 transitions, 5965 flow [2023-08-30 21:54:25,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 451 transitions, 5756 flow, removed 67 selfloop flow, removed 11 redundant places. [2023-08-30 21:54:25,856 INFO L231 Difference]: Finished difference. Result has 157 places, 374 transitions, 5065 flow [2023-08-30 21:54:25,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=3245, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5065, PETRI_PLACES=157, PETRI_TRANSITIONS=374} [2023-08-30 21:54:25,857 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 136 predicate places. [2023-08-30 21:54:25,857 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 374 transitions, 5065 flow [2023-08-30 21:54:25,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 142.91304347826087) internal successors, (3287), 23 states have internal predecessors, (3287), 0 states have call successors, (0), 0 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 21:54:25,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:54:25,858 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:54:25,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 21:54:26,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 21:54:26,065 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:54:26,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:54:26,065 INFO L85 PathProgramCache]: Analyzing trace with hash 829672547, now seen corresponding path program 7 times [2023-08-30 21:54:26,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:54:26,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883805514] [2023-08-30 21:54:26,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:54:26,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:54:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:54:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:54:27,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:54:27,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883805514] [2023-08-30 21:54:27,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883805514] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:54:27,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852577507] [2023-08-30 21:54:27,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:54:27,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:54:27,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:54:27,582 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:54:27,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 21:54:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:54:27,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 21:54:27,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:54:27,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:54:27,772 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 21:54:27,901 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:54:27,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-08-30 21:54:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:54:27,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:54:28,287 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:54:28,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 130 treesize of output 378 [2023-08-30 21:54:28,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:54:28,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 49 treesize of output 256 [2023-08-30 21:54:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:54:31,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852577507] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:54:31,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:54:31,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2023-08-30 21:54:31,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915181940] [2023-08-30 21:54:31,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:54:31,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 21:54:31,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:54:31,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 21:54:31,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=615, Unknown=9, NotChecked=0, Total=702 [2023-08-30 21:54:33,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:54:36,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:54:39,432 WARN L539 Checker$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 21:54:41,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:54:44,059 WARN L539 Checker$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 21:54:46,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:54:48,418 WARN L539 Checker$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 21:54:50,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:54:52,764 WARN L539 Checker$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 21:54:52,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-08-30 21:54:52,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 374 transitions, 5065 flow. Second operand has 27 states, 27 states have (on average 116.70370370370371) internal successors, (3151), 27 states have internal predecessors, (3151), 0 states have call successors, (0), 0 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 21:54:52,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:54:52,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-08-30 21:54:52,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:54:54,869 INFO L130 PetriNetUnfolder]: 2281/4117 cut-off events. [2023-08-30 21:54:54,869 INFO L131 PetriNetUnfolder]: For 21921/21966 co-relation queries the response was YES. [2023-08-30 21:54:54,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22823 conditions, 4117 events. 2281/4117 cut-off events. For 21921/21966 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 26581 event pairs, 474 based on Foata normal form. 41/4148 useless extension candidates. Maximal degree in co-relation 21160. Up to 2658 conditions per place. [2023-08-30 21:54:54,891 INFO L137 encePairwiseOnDemand]: 387/393 looper letters, 357 selfloop transitions, 139 changer transitions 5/508 dead transitions. [2023-08-30 21:54:54,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 508 transitions, 7254 flow [2023-08-30 21:54:54,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 21:54:54,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 21:54:54,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3133 transitions. [2023-08-30 21:54:54,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30661577608142493 [2023-08-30 21:54:54,915 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3133 transitions. [2023-08-30 21:54:54,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3133 transitions. [2023-08-30 21:54:54,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:54:54,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3133 transitions. [2023-08-30 21:54:54,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 120.5) internal successors, (3133), 26 states have internal predecessors, (3133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:54,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 393.0) internal successors, (10611), 27 states have internal predecessors, (10611), 0 states have call successors, (0), 0 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 21:54:54,926 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 393.0) internal successors, (10611), 27 states have internal predecessors, (10611), 0 states have call successors, (0), 0 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 21:54:54,926 INFO L175 Difference]: Start difference. First operand has 157 places, 374 transitions, 5065 flow. Second operand 26 states and 3133 transitions. [2023-08-30 21:54:54,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 508 transitions, 7254 flow [2023-08-30 21:54:54,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 508 transitions, 7052 flow, removed 68 selfloop flow, removed 10 redundant places. [2023-08-30 21:54:55,001 INFO L231 Difference]: Finished difference. Result has 175 places, 419 transitions, 5881 flow [2023-08-30 21:54:55,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=4875, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5881, PETRI_PLACES=175, PETRI_TRANSITIONS=419} [2023-08-30 21:54:55,002 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 154 predicate places. [2023-08-30 21:54:55,002 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 419 transitions, 5881 flow [2023-08-30 21:54:55,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 116.70370370370371) internal successors, (3151), 27 states have internal predecessors, (3151), 0 states have call successors, (0), 0 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 21:54:55,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:54:55,003 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:54:55,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 21:54:55,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 21:54:55,208 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:54:55,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:54:55,208 INFO L85 PathProgramCache]: Analyzing trace with hash 2125766925, now seen corresponding path program 8 times [2023-08-30 21:54:55,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:54:55,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763619985] [2023-08-30 21:54:55,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:54:55,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:54:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:54:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:54:57,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:54:57,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763619985] [2023-08-30 21:54:57,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763619985] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:54:57,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507324833] [2023-08-30 21:54:57,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:54:57,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:54:57,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:54:57,015 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:54:57,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 21:54:57,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:54:57,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:54:57,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 21:54:57,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:54:57,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:54:57,243 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 21:54:57,393 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:54:57,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-08-30 21:54:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:54:57,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:54:57,570 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_426 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_426) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset))))) 4))) (select .cse0 (+ (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))) 4))) 4) c_~f~0.offset))))) is different from false [2023-08-30 21:54:57,748 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:54:57,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 130 treesize of output 378 [2023-08-30 21:54:57,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:54:57,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 49 treesize of output 256 [2023-08-30 21:55:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:55:01,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507324833] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:55:01,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:55:01,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2023-08-30 21:55:01,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49783113] [2023-08-30 21:55:01,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:55:01,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 21:55:01,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:55:01,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 21:55:01,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=570, Unknown=1, NotChecked=48, Total=702 [2023-08-30 21:55:01,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-08-30 21:55:01,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 419 transitions, 5881 flow. Second operand has 27 states, 27 states have (on average 116.70370370370371) internal successors, (3151), 27 states have internal predecessors, (3151), 0 states have call successors, (0), 0 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 21:55:01,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:55:01,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-08-30 21:55:01,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:55:03,486 INFO L130 PetriNetUnfolder]: 2836/5125 cut-off events. [2023-08-30 21:55:03,486 INFO L131 PetriNetUnfolder]: For 33480/33527 co-relation queries the response was YES. [2023-08-30 21:55:03,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29593 conditions, 5125 events. 2836/5125 cut-off events. For 33480/33527 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 34900 event pairs, 454 based on Foata normal form. 45/5160 useless extension candidates. Maximal degree in co-relation 27940. Up to 2915 conditions per place. [2023-08-30 21:55:03,548 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 318 selfloop transitions, 264 changer transitions 2/591 dead transitions. [2023-08-30 21:55:03,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 591 transitions, 9174 flow [2023-08-30 21:55:03,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 21:55:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 21:55:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2785 transitions. [2023-08-30 21:55:03,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3081093041265627 [2023-08-30 21:55:03,551 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2785 transitions. [2023-08-30 21:55:03,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2785 transitions. [2023-08-30 21:55:03,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:55:03,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2785 transitions. [2023-08-30 21:55:03,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 121.08695652173913) internal successors, (2785), 23 states have internal predecessors, (2785), 0 states have call successors, (0), 0 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 21:55:03,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 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 21:55:03,560 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 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 21:55:03,560 INFO L175 Difference]: Start difference. First operand has 175 places, 419 transitions, 5881 flow. Second operand 23 states and 2785 transitions. [2023-08-30 21:55:03,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 591 transitions, 9174 flow [2023-08-30 21:55:03,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 591 transitions, 8720 flow, removed 200 selfloop flow, removed 9 redundant places. [2023-08-30 21:55:03,696 INFO L231 Difference]: Finished difference. Result has 192 places, 516 transitions, 7872 flow [2023-08-30 21:55:03,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=5567, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7872, PETRI_PLACES=192, PETRI_TRANSITIONS=516} [2023-08-30 21:55:03,697 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 171 predicate places. [2023-08-30 21:55:03,697 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 516 transitions, 7872 flow [2023-08-30 21:55:03,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 116.70370370370371) internal successors, (3151), 27 states have internal predecessors, (3151), 0 states have call successors, (0), 0 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 21:55:03,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:55:03,698 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:55:03,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-30 21:55:03,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 21:55:03,917 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:55:03,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:55:03,917 INFO L85 PathProgramCache]: Analyzing trace with hash -816328831, now seen corresponding path program 9 times [2023-08-30 21:55:03,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:55:03,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488936962] [2023-08-30 21:55:03,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:03,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:55:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:55:05,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:55:05,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488936962] [2023-08-30 21:55:05,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488936962] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:55:05,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209855858] [2023-08-30 21:55:05,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:55:05,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:55:05,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:55:05,297 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:55:05,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 21:55:05,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 21:55:05,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:55:05,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 21:55:05,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:55:05,491 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 21:55:05,537 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 6 treesize of output 5 [2023-08-30 21:55:05,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:55:05,603 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 21:55:05,753 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:55:05,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 76 [2023-08-30 21:55:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:55:05,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:55:06,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:55:06,355 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 527 treesize of output 299 [2023-08-30 21:55:07,014 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:55:07,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 19 new quantified variables, introduced 55 case distinctions, treesize of input 1258 treesize of output 1580 [2023-08-30 21:55:07,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:55:07,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 17 new quantified variables, introduced 45 case distinctions, treesize of input 548 treesize of output 880 [2023-08-30 21:55:08,289 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:55:08,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 487 treesize of output 573 [2023-08-30 21:55:39,313 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-30 21:58:07,741 WARN L222 SmtUtils]: Spent 6.01s on a formula simplification. DAG size of input: 583 DAG size of output: 633 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 21:58:13,487 WARN L222 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 530 DAG size of output: 538 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 21:58:46,197 WARN L222 SmtUtils]: Spent 11.62s on a formula simplification. DAG size of input: 581 DAG size of output: 638 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 21:58:58,469 WARN L222 SmtUtils]: Spent 11.45s on a formula simplification. DAG size of input: 576 DAG size of output: 651 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 21:59:04,835 WARN L222 SmtUtils]: Spent 5.96s on a formula simplification. DAG size of input: 524 DAG size of output: 550 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 22:00:48,720 WARN L222 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 423 DAG size of output: 474 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 22:01:31,620 WARN L222 SmtUtils]: Spent 8.47s on a formula simplification. DAG size of input: 414 DAG size of output: 482 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 22:03:20,214 WARN L222 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 555 DAG size of output: 571 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 22:05:02,144 WARN L222 SmtUtils]: Spent 7.96s on a formula simplification. DAG size of input: 826 DAG size of output: 906 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 22:05:16,987 WARN L222 SmtUtils]: Spent 13.56s on a formula simplification. DAG size of input: 824 DAG size of output: 898 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 22:05:23,757 WARN L222 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 707 DAG size of output: 659 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15