./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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 ../sv-benchmarks/c/weaver/parallel-misc-2.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 c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:18:23,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:18:23,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:18:23,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:18:23,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:18:23,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:18:23,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:18:23,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:18:23,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:18:23,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:18:23,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:18:23,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:18:23,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:18:23,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:18:23,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:18:23,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:18:23,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:18:23,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:18:23,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:18:23,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:18:23,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:18:23,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:18:23,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:18:23,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:18:23,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:18:23,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:18:23,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:18:23,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:18:23,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:18:23,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:18:23,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:18:23,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:18:23,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:18:23,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:18:23,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:18:23,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:18:23,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:18:23,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:18:23,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:18:23,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:18:23,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:18:23,187 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 15:18:23,211 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:18:23,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:18:23,212 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:18:23,212 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:18:23,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:18:23,213 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:18:23,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:18:23,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:18:23,213 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:18:23,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:18:23,214 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 15:18:23,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:18:23,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 15:18:23,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:18:23,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:18:23,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:18:23,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:18:23,215 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 15:18:23,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:18:23,215 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:18:23,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:18:23,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:18:23,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:18:23,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:18:23,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:18:23,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:18:23,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:18:23,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:18:23,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:18:23,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:18:23,217 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:18:23,217 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:18:23,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:18:23,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:18:23,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 [2021-12-21 15:18:23,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:18:23,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:18:23,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:18:23,412 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:18:23,413 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:18:23,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2021-12-21 15:18:23,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27152fd6f/dbc9196a7120484ab72e98a2186736a1/FLAGe4051fbf0 [2021-12-21 15:18:23,809 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:18:23,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2021-12-21 15:18:23,815 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27152fd6f/dbc9196a7120484ab72e98a2186736a1/FLAGe4051fbf0 [2021-12-21 15:18:24,269 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27152fd6f/dbc9196a7120484ab72e98a2186736a1 [2021-12-21 15:18:24,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:18:24,272 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:18:24,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:18:24,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:18:24,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:18:24,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:18:24" (1/1) ... [2021-12-21 15:18:24,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@294156f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:18:24, skipping insertion in model container [2021-12-21 15:18:24,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:18:24" (1/1) ... [2021-12-21 15:18:24,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:18:24,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:18:24,459 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c[2554,2567] [2021-12-21 15:18:24,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:18:24,466 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:18:24,480 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c[2554,2567] [2021-12-21 15:18:24,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:18:24,490 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:18:24,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:18:24 WrapperNode [2021-12-21 15:18:24,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:18:24,491 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:18:24,492 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:18:24,492 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:18:24,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:18:24" (1/1) ... [2021-12-21 15:18:24,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:18:24" (1/1) ... [2021-12-21 15:18:24,515 INFO L137 Inliner]: procedures = 21, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2021-12-21 15:18:24,516 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:18:24,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:18:24,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:18:24,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:18:24,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:18:24" (1/1) ... [2021-12-21 15:18:24,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:18:24" (1/1) ... [2021-12-21 15:18:24,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:18:24" (1/1) ... [2021-12-21 15:18:24,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:18:24" (1/1) ... [2021-12-21 15:18:24,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:18:24" (1/1) ... [2021-12-21 15:18:24,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:18:24" (1/1) ... [2021-12-21 15:18:24,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:18:24" (1/1) ... [2021-12-21 15:18:24,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:18:24,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:18:24,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:18:24,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:18:24,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:18:24" (1/1) ... [2021-12-21 15:18:24,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:18:24,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:18:24,555 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) [2021-12-21 15:18:24,557 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 [2021-12-21 15:18:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:18:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-21 15:18:24,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-21 15:18:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-21 15:18:24,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-21 15:18:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:18:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:18:24,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:18:24,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-21 15:18:24,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-21 15:18:24,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:18:24,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:18:24,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:18:24,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:18:24,587 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-21 15:18:24,650 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:18:24,651 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:18:24,807 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:18:24,822 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:18:24,822 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 15:18:24,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:18:24 BoogieIcfgContainer [2021-12-21 15:18:24,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:18:24,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:18:24,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:18:24,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:18:24,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:18:24" (1/3) ... [2021-12-21 15:18:24,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@102645e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:18:24, skipping insertion in model container [2021-12-21 15:18:24,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:18:24" (2/3) ... [2021-12-21 15:18:24,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@102645e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:18:24, skipping insertion in model container [2021-12-21 15:18:24,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:18:24" (3/3) ... [2021-12-21 15:18:24,832 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2021-12-21 15:18:24,836 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-21 15:18:24,836 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:18:24,836 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:18:24,836 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-21 15:18:24,874 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,875 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,875 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,875 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,875 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,876 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,876 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,876 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,876 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,876 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,876 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,877 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,877 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,877 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,878 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,878 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,878 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,878 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,879 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,879 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,879 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,879 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,880 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,880 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,882 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,882 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,882 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,882 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,882 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,883 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,883 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,883 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:18:24,886 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-21 15:18:24,918 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:18:24,923 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 15:18:24,923 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-21 15:18:24,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 103 places, 104 transitions, 224 flow [2021-12-21 15:18:24,966 INFO L129 PetriNetUnfolder]: 8/102 cut-off events. [2021-12-21 15:18:24,967 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-21 15:18:24,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 102 events. 8/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2021-12-21 15:18:24,969 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 104 transitions, 224 flow [2021-12-21 15:18:24,973 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 93 transitions, 198 flow [2021-12-21 15:18:24,989 INFO L129 PetriNetUnfolder]: 8/92 cut-off events. [2021-12-21 15:18:24,989 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-21 15:18:24,989 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:24,990 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:24,990 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:18:24,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:24,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1147510984, now seen corresponding path program 1 times [2021-12-21 15:18:25,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:25,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434922253] [2021-12-21 15:18:25,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:25,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:25,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:25,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434922253] [2021-12-21 15:18:25,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434922253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:18:25,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:18:25,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:18:25,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652433486] [2021-12-21 15:18:25,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:18:25,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:18:25,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:25,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:18:25,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:18:25,471 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-12-21 15:18:25,477 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 93 transitions, 198 flow. Second operand has 8 states, 8 states have (on average 69.5) internal successors, (556), 8 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:25,477 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:25,477 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-12-21 15:18:25,478 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:25,776 INFO L129 PetriNetUnfolder]: 83/278 cut-off events. [2021-12-21 15:18:25,777 INFO L130 PetriNetUnfolder]: For 46/53 co-relation queries the response was YES. [2021-12-21 15:18:25,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 278 events. 83/278 cut-off events. For 46/53 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1032 event pairs, 23 based on Foata normal form. 4/238 useless extension candidates. Maximal degree in co-relation 320. Up to 121 conditions per place. [2021-12-21 15:18:25,783 INFO L132 encePairwiseOnDemand]: 86/104 looper letters, 31 selfloop transitions, 9 changer transitions 7/104 dead transitions. [2021-12-21 15:18:25,784 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 104 transitions, 323 flow [2021-12-21 15:18:25,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 15:18:25,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-21 15:18:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 725 transitions. [2021-12-21 15:18:25,803 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6971153846153846 [2021-12-21 15:18:25,804 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 725 transitions. [2021-12-21 15:18:25,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 725 transitions. [2021-12-21 15:18:25,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:25,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 725 transitions. [2021-12-21 15:18:25,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 72.5) internal successors, (725), 10 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:25,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:25,826 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:25,827 INFO L186 Difference]: Start difference. First operand has 92 places, 93 transitions, 198 flow. Second operand 10 states and 725 transitions. [2021-12-21 15:18:25,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 104 transitions, 323 flow [2021-12-21 15:18:25,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 104 transitions, 309 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-21 15:18:25,836 INFO L242 Difference]: Finished difference. Result has 100 places, 91 transitions, 223 flow [2021-12-21 15:18:25,838 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=223, PETRI_PLACES=100, PETRI_TRANSITIONS=91} [2021-12-21 15:18:25,842 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 8 predicate places. [2021-12-21 15:18:25,843 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 91 transitions, 223 flow [2021-12-21 15:18:25,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 69.5) internal successors, (556), 8 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:25,843 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:25,844 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:25,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:18:25,845 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:18:25,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:25,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1612472794, now seen corresponding path program 1 times [2021-12-21 15:18:25,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:25,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585375393] [2021-12-21 15:18:25,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:25,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:26,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:26,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585375393] [2021-12-21 15:18:26,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585375393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:18:26,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:18:26,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:18:26,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292410694] [2021-12-21 15:18:26,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:18:26,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:18:26,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:26,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:18:26,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:18:26,043 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2021-12-21 15:18:26,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 91 transitions, 223 flow. Second operand has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:26,043 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:26,044 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2021-12-21 15:18:26,044 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:26,221 INFO L129 PetriNetUnfolder]: 87/304 cut-off events. [2021-12-21 15:18:26,222 INFO L130 PetriNetUnfolder]: For 40/48 co-relation queries the response was YES. [2021-12-21 15:18:26,223 INFO L84 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 304 events. 87/304 cut-off events. For 40/48 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1233 event pairs, 10 based on Foata normal form. 1/263 useless extension candidates. Maximal degree in co-relation 527. Up to 74 conditions per place. [2021-12-21 15:18:26,224 INFO L132 encePairwiseOnDemand]: 91/104 looper letters, 43 selfloop transitions, 15 changer transitions 4/123 dead transitions. [2021-12-21 15:18:26,224 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 123 transitions, 434 flow [2021-12-21 15:18:26,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:18:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:18:26,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 542 transitions. [2021-12-21 15:18:26,226 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7445054945054945 [2021-12-21 15:18:26,226 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 542 transitions. [2021-12-21 15:18:26,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 542 transitions. [2021-12-21 15:18:26,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:26,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 542 transitions. [2021-12-21 15:18:26,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.42857142857143) internal successors, (542), 7 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:26,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:26,229 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:26,230 INFO L186 Difference]: Start difference. First operand has 100 places, 91 transitions, 223 flow. Second operand 7 states and 542 transitions. [2021-12-21 15:18:26,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 123 transitions, 434 flow [2021-12-21 15:18:26,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 123 transitions, 415 flow, removed 2 selfloop flow, removed 6 redundant places. [2021-12-21 15:18:26,238 INFO L242 Difference]: Finished difference. Result has 97 places, 98 transitions, 279 flow [2021-12-21 15:18:26,238 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=279, PETRI_PLACES=97, PETRI_TRANSITIONS=98} [2021-12-21 15:18:26,238 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 5 predicate places. [2021-12-21 15:18:26,239 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 98 transitions, 279 flow [2021-12-21 15:18:26,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:26,239 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:26,239 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:26,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 15:18:26,240 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:18:26,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:26,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1489782240, now seen corresponding path program 2 times [2021-12-21 15:18:26,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:26,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228336719] [2021-12-21 15:18:26,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:26,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:26,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:26,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228336719] [2021-12-21 15:18:26,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228336719] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:18:26,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:18:26,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:18:26,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989026043] [2021-12-21 15:18:26,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:18:26,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:18:26,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:26,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:18:26,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:18:26,378 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2021-12-21 15:18:26,378 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 98 transitions, 279 flow. Second operand has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:26,378 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:26,378 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2021-12-21 15:18:26,379 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:26,514 INFO L129 PetriNetUnfolder]: 84/308 cut-off events. [2021-12-21 15:18:26,514 INFO L130 PetriNetUnfolder]: For 126/130 co-relation queries the response was YES. [2021-12-21 15:18:26,515 INFO L84 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 308 events. 84/308 cut-off events. For 126/130 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1269 event pairs, 13 based on Foata normal form. 7/295 useless extension candidates. Maximal degree in co-relation 326. Up to 48 conditions per place. [2021-12-21 15:18:26,517 INFO L132 encePairwiseOnDemand]: 93/104 looper letters, 39 selfloop transitions, 16 changer transitions 4/120 dead transitions. [2021-12-21 15:18:26,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 120 transitions, 482 flow [2021-12-21 15:18:26,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:18:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:18:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 536 transitions. [2021-12-21 15:18:26,519 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7362637362637363 [2021-12-21 15:18:26,519 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 536 transitions. [2021-12-21 15:18:26,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 536 transitions. [2021-12-21 15:18:26,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:26,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 536 transitions. [2021-12-21 15:18:26,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:26,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:26,523 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:26,523 INFO L186 Difference]: Start difference. First operand has 97 places, 98 transitions, 279 flow. Second operand 7 states and 536 transitions. [2021-12-21 15:18:26,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 120 transitions, 482 flow [2021-12-21 15:18:26,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 120 transitions, 478 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-21 15:18:26,528 INFO L242 Difference]: Finished difference. Result has 105 places, 103 transitions, 373 flow [2021-12-21 15:18:26,529 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=373, PETRI_PLACES=105, PETRI_TRANSITIONS=103} [2021-12-21 15:18:26,530 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 13 predicate places. [2021-12-21 15:18:26,530 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 103 transitions, 373 flow [2021-12-21 15:18:26,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:26,531 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:26,531 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:26,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 15:18:26,531 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:18:26,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:26,532 INFO L85 PathProgramCache]: Analyzing trace with hash 256466347, now seen corresponding path program 1 times [2021-12-21 15:18:26,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:26,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802449926] [2021-12-21 15:18:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:26,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:26,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:26,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802449926] [2021-12-21 15:18:26,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802449926] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:18:26,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614156861] [2021-12-21 15:18:26,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:26,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:18:26,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:18:26,689 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) [2021-12-21 15:18:26,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 15:18:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:26,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 15:18:26,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:18:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:27,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:18:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:27,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614156861] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:18:27,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:18:27,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2021-12-21 15:18:27,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143855077] [2021-12-21 15:18:27,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:18:27,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 15:18:27,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:27,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 15:18:27,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-21 15:18:27,608 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2021-12-21 15:18:27,609 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 103 transitions, 373 flow. Second operand has 13 states, 13 states have (on average 72.3076923076923) internal successors, (940), 13 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:27,609 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:27,609 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2021-12-21 15:18:27,609 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:27,838 INFO L129 PetriNetUnfolder]: 105/399 cut-off events. [2021-12-21 15:18:27,839 INFO L130 PetriNetUnfolder]: For 482/482 co-relation queries the response was YES. [2021-12-21 15:18:27,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 399 events. 105/399 cut-off events. For 482/482 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1805 event pairs, 6 based on Foata normal form. 9/382 useless extension candidates. Maximal degree in co-relation 501. Up to 65 conditions per place. [2021-12-21 15:18:27,842 INFO L132 encePairwiseOnDemand]: 95/104 looper letters, 66 selfloop transitions, 13 changer transitions 3/143 dead transitions. [2021-12-21 15:18:27,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 143 transitions, 733 flow [2021-12-21 15:18:27,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 15:18:27,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-21 15:18:27,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 692 transitions. [2021-12-21 15:18:27,844 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7393162393162394 [2021-12-21 15:18:27,844 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 692 transitions. [2021-12-21 15:18:27,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 692 transitions. [2021-12-21 15:18:27,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:27,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 692 transitions. [2021-12-21 15:18:27,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 76.88888888888889) internal successors, (692), 9 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:27,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:27,848 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:27,848 INFO L186 Difference]: Start difference. First operand has 105 places, 103 transitions, 373 flow. Second operand 9 states and 692 transitions. [2021-12-21 15:18:27,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 143 transitions, 733 flow [2021-12-21 15:18:27,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 143 transitions, 721 flow, removed 4 selfloop flow, removed 2 redundant places. [2021-12-21 15:18:27,853 INFO L242 Difference]: Finished difference. Result has 115 places, 108 transitions, 452 flow [2021-12-21 15:18:27,853 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=452, PETRI_PLACES=115, PETRI_TRANSITIONS=108} [2021-12-21 15:18:27,853 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 23 predicate places. [2021-12-21 15:18:27,854 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 108 transitions, 452 flow [2021-12-21 15:18:27,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 72.3076923076923) internal successors, (940), 13 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:27,854 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:27,854 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:27,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 15:18:28,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:18:28,070 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:18:28,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:28,070 INFO L85 PathProgramCache]: Analyzing trace with hash -995906079, now seen corresponding path program 2 times [2021-12-21 15:18:28,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:28,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436710039] [2021-12-21 15:18:28,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:28,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:28,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:28,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436710039] [2021-12-21 15:18:28,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436710039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:18:28,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:18:28,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:18:28,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408868044] [2021-12-21 15:18:28,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:18:28,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:18:28,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:28,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:18:28,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:18:28,144 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2021-12-21 15:18:28,144 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 108 transitions, 452 flow. Second operand has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:28,144 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:28,144 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2021-12-21 15:18:28,144 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:28,289 INFO L129 PetriNetUnfolder]: 104/382 cut-off events. [2021-12-21 15:18:28,290 INFO L130 PetriNetUnfolder]: For 666/666 co-relation queries the response was YES. [2021-12-21 15:18:28,291 INFO L84 FinitePrefix]: Finished finitePrefix Result has 981 conditions, 382 events. 104/382 cut-off events. For 666/666 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1676 event pairs, 9 based on Foata normal form. 1/358 useless extension candidates. Maximal degree in co-relation 695. Up to 105 conditions per place. [2021-12-21 15:18:28,293 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 48 selfloop transitions, 14 changer transitions 3/126 dead transitions. [2021-12-21 15:18:28,293 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 126 transitions, 673 flow [2021-12-21 15:18:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:18:28,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:18:28,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 532 transitions. [2021-12-21 15:18:28,294 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7307692307692307 [2021-12-21 15:18:28,294 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 532 transitions. [2021-12-21 15:18:28,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 532 transitions. [2021-12-21 15:18:28,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:28,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 532 transitions. [2021-12-21 15:18:28,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:28,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:28,297 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:28,297 INFO L186 Difference]: Start difference. First operand has 115 places, 108 transitions, 452 flow. Second operand 7 states and 532 transitions. [2021-12-21 15:18:28,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 126 transitions, 673 flow [2021-12-21 15:18:28,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 126 transitions, 646 flow, removed 9 selfloop flow, removed 3 redundant places. [2021-12-21 15:18:28,301 INFO L242 Difference]: Finished difference. Result has 120 places, 110 transitions, 489 flow [2021-12-21 15:18:28,301 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=489, PETRI_PLACES=120, PETRI_TRANSITIONS=110} [2021-12-21 15:18:28,302 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 28 predicate places. [2021-12-21 15:18:28,302 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 110 transitions, 489 flow [2021-12-21 15:18:28,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:28,302 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:28,302 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:28,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 15:18:28,303 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:18:28,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:28,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1643762059, now seen corresponding path program 1 times [2021-12-21 15:18:28,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:28,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141989426] [2021-12-21 15:18:28,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:28,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:28,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:28,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:28,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141989426] [2021-12-21 15:18:28,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141989426] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:18:28,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478941353] [2021-12-21 15:18:28,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:28,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:18:28,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:18:28,487 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) [2021-12-21 15:18:28,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 15:18:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:28,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 15:18:28,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:18:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:28,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:18:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:29,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478941353] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:18:29,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:18:29,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2021-12-21 15:18:29,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171258821] [2021-12-21 15:18:29,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:18:29,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 15:18:29,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:29,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 15:18:29,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-12-21 15:18:29,362 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-12-21 15:18:29,363 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 110 transitions, 489 flow. Second operand has 20 states, 20 states have (on average 70.15) internal successors, (1403), 20 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:29,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:29,364 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-12-21 15:18:29,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:31,043 INFO L129 PetriNetUnfolder]: 313/843 cut-off events. [2021-12-21 15:18:31,043 INFO L130 PetriNetUnfolder]: For 1964/1964 co-relation queries the response was YES. [2021-12-21 15:18:31,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2390 conditions, 843 events. 313/843 cut-off events. For 1964/1964 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4233 event pairs, 5 based on Foata normal form. 29/817 useless extension candidates. Maximal degree in co-relation 1847. Up to 182 conditions per place. [2021-12-21 15:18:31,050 INFO L132 encePairwiseOnDemand]: 87/104 looper letters, 139 selfloop transitions, 83 changer transitions 0/281 dead transitions. [2021-12-21 15:18:31,050 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 281 transitions, 1913 flow [2021-12-21 15:18:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-21 15:18:31,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-12-21 15:18:31,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3031 transitions. [2021-12-21 15:18:31,056 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6939102564102564 [2021-12-21 15:18:31,056 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3031 transitions. [2021-12-21 15:18:31,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3031 transitions. [2021-12-21 15:18:31,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:31,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3031 transitions. [2021-12-21 15:18:31,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 72.16666666666667) internal successors, (3031), 42 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:31,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 104.0) internal successors, (4472), 43 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:31,069 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 104.0) internal successors, (4472), 43 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:31,070 INFO L186 Difference]: Start difference. First operand has 120 places, 110 transitions, 489 flow. Second operand 42 states and 3031 transitions. [2021-12-21 15:18:31,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 281 transitions, 1913 flow [2021-12-21 15:18:31,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 281 transitions, 1871 flow, removed 9 selfloop flow, removed 5 redundant places. [2021-12-21 15:18:31,077 INFO L242 Difference]: Finished difference. Result has 183 places, 174 transitions, 1237 flow [2021-12-21 15:18:31,078 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1237, PETRI_PLACES=183, PETRI_TRANSITIONS=174} [2021-12-21 15:18:31,078 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 91 predicate places. [2021-12-21 15:18:31,078 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 174 transitions, 1237 flow [2021-12-21 15:18:31,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 70.15) internal successors, (1403), 20 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:31,079 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:31,079 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:31,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 15:18:31,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-21 15:18:31,296 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:18:31,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:31,296 INFO L85 PathProgramCache]: Analyzing trace with hash 627040508, now seen corresponding path program 2 times [2021-12-21 15:18:31,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:31,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323413367] [2021-12-21 15:18:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:31,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:31,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 15:18:31,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:31,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323413367] [2021-12-21 15:18:31,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323413367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:18:31,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:18:31,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:18:31,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844856389] [2021-12-21 15:18:31,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:18:31,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:18:31,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:31,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:18:31,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:18:31,340 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2021-12-21 15:18:31,340 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 174 transitions, 1237 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:31,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:31,341 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2021-12-21 15:18:31,341 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:31,521 INFO L129 PetriNetUnfolder]: 392/1476 cut-off events. [2021-12-21 15:18:31,521 INFO L130 PetriNetUnfolder]: For 9574/9655 co-relation queries the response was YES. [2021-12-21 15:18:31,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5660 conditions, 1476 events. 392/1476 cut-off events. For 9574/9655 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 10580 event pairs, 89 based on Foata normal form. 34/1370 useless extension candidates. Maximal degree in co-relation 4950. Up to 222 conditions per place. [2021-12-21 15:18:31,536 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 19 selfloop transitions, 5 changer transitions 0/185 dead transitions. [2021-12-21 15:18:31,536 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 185 transitions, 1315 flow [2021-12-21 15:18:31,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 15:18:31,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-21 15:18:31,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 376 transitions. [2021-12-21 15:18:31,538 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9038461538461539 [2021-12-21 15:18:31,538 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 376 transitions. [2021-12-21 15:18:31,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 376 transitions. [2021-12-21 15:18:31,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:31,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 376 transitions. [2021-12-21 15:18:31,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:31,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:31,540 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:31,540 INFO L186 Difference]: Start difference. First operand has 183 places, 174 transitions, 1237 flow. Second operand 4 states and 376 transitions. [2021-12-21 15:18:31,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 185 transitions, 1315 flow [2021-12-21 15:18:31,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 185 transitions, 1176 flow, removed 40 selfloop flow, removed 11 redundant places. [2021-12-21 15:18:31,567 INFO L242 Difference]: Finished difference. Result has 178 places, 177 transitions, 1132 flow [2021-12-21 15:18:31,567 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1132, PETRI_PLACES=178, PETRI_TRANSITIONS=177} [2021-12-21 15:18:31,568 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 86 predicate places. [2021-12-21 15:18:31,568 INFO L470 AbstractCegarLoop]: Abstraction has has 178 places, 177 transitions, 1132 flow [2021-12-21 15:18:31,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:31,568 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:31,569 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:31,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 15:18:31,569 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:18:31,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:31,569 INFO L85 PathProgramCache]: Analyzing trace with hash -913504088, now seen corresponding path program 1 times [2021-12-21 15:18:31,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:31,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405848212] [2021-12-21 15:18:31,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:31,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 15:18:31,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:31,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405848212] [2021-12-21 15:18:31,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405848212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:18:31,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:18:31,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:18:31,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403536585] [2021-12-21 15:18:31,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:18:31,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:18:31,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:31,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:18:31,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:18:31,626 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2021-12-21 15:18:31,626 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 177 transitions, 1132 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:31,626 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:31,626 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2021-12-21 15:18:31,626 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:31,993 INFO L129 PetriNetUnfolder]: 744/2581 cut-off events. [2021-12-21 15:18:31,993 INFO L130 PetriNetUnfolder]: For 15966/16070 co-relation queries the response was YES. [2021-12-21 15:18:32,010 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10355 conditions, 2581 events. 744/2581 cut-off events. For 15966/16070 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 22277 event pairs, 113 based on Foata normal form. 30/2482 useless extension candidates. Maximal degree in co-relation 8938. Up to 360 conditions per place. [2021-12-21 15:18:32,021 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 21 selfloop transitions, 6 changer transitions 0/191 dead transitions. [2021-12-21 15:18:32,021 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 191 transitions, 1233 flow [2021-12-21 15:18:32,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 15:18:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-21 15:18:32,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2021-12-21 15:18:32,023 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9014423076923077 [2021-12-21 15:18:32,023 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 375 transitions. [2021-12-21 15:18:32,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 375 transitions. [2021-12-21 15:18:32,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:32,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 375 transitions. [2021-12-21 15:18:32,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:32,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:32,025 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:32,025 INFO L186 Difference]: Start difference. First operand has 178 places, 177 transitions, 1132 flow. Second operand 4 states and 375 transitions. [2021-12-21 15:18:32,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 191 transitions, 1233 flow [2021-12-21 15:18:32,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 191 transitions, 1233 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-21 15:18:32,104 INFO L242 Difference]: Finished difference. Result has 184 places, 180 transitions, 1170 flow [2021-12-21 15:18:32,104 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1170, PETRI_PLACES=184, PETRI_TRANSITIONS=180} [2021-12-21 15:18:32,106 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 92 predicate places. [2021-12-21 15:18:32,107 INFO L470 AbstractCegarLoop]: Abstraction has has 184 places, 180 transitions, 1170 flow [2021-12-21 15:18:32,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:32,107 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:32,107 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:32,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 15:18:32,108 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:18:32,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:32,108 INFO L85 PathProgramCache]: Analyzing trace with hash -990376246, now seen corresponding path program 1 times [2021-12-21 15:18:32,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:32,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664543379] [2021-12-21 15:18:32,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:32,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 15:18:32,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:32,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664543379] [2021-12-21 15:18:32,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664543379] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:18:32,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:18:32,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:18:32,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378715313] [2021-12-21 15:18:32,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:18:32,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:18:32,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:32,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:18:32,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:18:32,172 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2021-12-21 15:18:32,172 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 180 transitions, 1170 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:32,173 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:32,173 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2021-12-21 15:18:32,173 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:32,405 INFO L129 PetriNetUnfolder]: 415/1673 cut-off events. [2021-12-21 15:18:32,405 INFO L130 PetriNetUnfolder]: For 11732/11836 co-relation queries the response was YES. [2021-12-21 15:18:32,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7315 conditions, 1673 events. 415/1673 cut-off events. For 11732/11836 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 12896 event pairs, 98 based on Foata normal form. 58/1663 useless extension candidates. Maximal degree in co-relation 6829. Up to 193 conditions per place. [2021-12-21 15:18:32,424 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 15 selfloop transitions, 7 changer transitions 0/186 dead transitions. [2021-12-21 15:18:32,424 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 186 transitions, 1236 flow [2021-12-21 15:18:32,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 15:18:32,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-21 15:18:32,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 371 transitions. [2021-12-21 15:18:32,426 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8918269230769231 [2021-12-21 15:18:32,426 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 371 transitions. [2021-12-21 15:18:32,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 371 transitions. [2021-12-21 15:18:32,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:32,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 371 transitions. [2021-12-21 15:18:32,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:32,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:32,428 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:32,428 INFO L186 Difference]: Start difference. First operand has 184 places, 180 transitions, 1170 flow. Second operand 4 states and 371 transitions. [2021-12-21 15:18:32,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 186 transitions, 1236 flow [2021-12-21 15:18:32,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 186 transitions, 1236 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-21 15:18:32,457 INFO L242 Difference]: Finished difference. Result has 189 places, 182 transitions, 1210 flow [2021-12-21 15:18:32,457 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1210, PETRI_PLACES=189, PETRI_TRANSITIONS=182} [2021-12-21 15:18:32,458 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 97 predicate places. [2021-12-21 15:18:32,458 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 182 transitions, 1210 flow [2021-12-21 15:18:32,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:32,459 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:32,459 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:32,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 15:18:32,459 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:18:32,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:32,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1464456534, now seen corresponding path program 1 times [2021-12-21 15:18:32,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:32,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780389592] [2021-12-21 15:18:32,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:32,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:18:32,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:32,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780389592] [2021-12-21 15:18:32,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780389592] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:18:32,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004940000] [2021-12-21 15:18:32,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:32,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:18:32,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:18:32,621 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) [2021-12-21 15:18:32,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 15:18:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:32,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 15:18:32,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:18:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:18:32,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:18:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:18:33,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004940000] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:18:33,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:18:33,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2021-12-21 15:18:33,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247911846] [2021-12-21 15:18:33,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:18:33,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:18:33,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:33,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:18:33,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:18:33,107 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2021-12-21 15:18:33,107 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 182 transitions, 1210 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:33,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:33,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2021-12-21 15:18:33,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:33,773 INFO L129 PetriNetUnfolder]: 761/3083 cut-off events. [2021-12-21 15:18:33,773 INFO L130 PetriNetUnfolder]: For 22061/22238 co-relation queries the response was YES. [2021-12-21 15:18:33,791 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13471 conditions, 3083 events. 761/3083 cut-off events. For 22061/22238 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 27583 event pairs, 192 based on Foata normal form. 63/3038 useless extension candidates. Maximal degree in co-relation 12013. Up to 354 conditions per place. [2021-12-21 15:18:33,805 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 29 selfloop transitions, 20 changer transitions 4/213 dead transitions. [2021-12-21 15:18:33,805 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 213 transitions, 1409 flow [2021-12-21 15:18:33,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 15:18:33,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-21 15:18:33,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 844 transitions. [2021-12-21 15:18:33,807 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8115384615384615 [2021-12-21 15:18:33,807 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 844 transitions. [2021-12-21 15:18:33,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 844 transitions. [2021-12-21 15:18:33,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:33,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 844 transitions. [2021-12-21 15:18:33,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.4) internal successors, (844), 10 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:33,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:33,811 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:33,811 INFO L186 Difference]: Start difference. First operand has 189 places, 182 transitions, 1210 flow. Second operand 10 states and 844 transitions. [2021-12-21 15:18:33,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 213 transitions, 1409 flow [2021-12-21 15:18:33,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 213 transitions, 1401 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-12-21 15:18:33,851 INFO L242 Difference]: Finished difference. Result has 200 places, 193 transitions, 1308 flow [2021-12-21 15:18:33,852 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1308, PETRI_PLACES=200, PETRI_TRANSITIONS=193} [2021-12-21 15:18:33,853 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 108 predicate places. [2021-12-21 15:18:33,853 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 193 transitions, 1308 flow [2021-12-21 15:18:33,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:33,853 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:33,853 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:33,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 15:18:34,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:18:34,067 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:18:34,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:34,068 INFO L85 PathProgramCache]: Analyzing trace with hash 419087372, now seen corresponding path program 2 times [2021-12-21 15:18:34,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:34,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530563548] [2021-12-21 15:18:34,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:34,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:34,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:34,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530563548] [2021-12-21 15:18:34,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530563548] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:18:34,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287889129] [2021-12-21 15:18:34,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:18:34,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:18:34,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:18:34,238 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) [2021-12-21 15:18:34,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 15:18:34,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:18:34,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:18:34,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 15:18:34,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:18:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:18:34,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:18:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:18:34,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287889129] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:18:34,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:18:34,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2021-12-21 15:18:34,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935057466] [2021-12-21 15:18:34,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:18:34,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 15:18:34,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:34,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 15:18:34,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-21 15:18:34,790 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-12-21 15:18:34,791 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 193 transitions, 1308 flow. Second operand has 15 states, 15 states have (on average 70.2) internal successors, (1053), 15 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:34,791 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:34,791 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-12-21 15:18:34,791 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:36,030 INFO L129 PetriNetUnfolder]: 1735/5296 cut-off events. [2021-12-21 15:18:36,030 INFO L130 PetriNetUnfolder]: For 46143/46172 co-relation queries the response was YES. [2021-12-21 15:18:36,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26284 conditions, 5296 events. 1735/5296 cut-off events. For 46143/46172 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 49050 event pairs, 470 based on Foata normal form. 15/5267 useless extension candidates. Maximal degree in co-relation 26176. Up to 1521 conditions per place. [2021-12-21 15:18:36,093 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 331 selfloop transitions, 28 changer transitions 4/440 dead transitions. [2021-12-21 15:18:36,093 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 440 transitions, 4362 flow [2021-12-21 15:18:36,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 15:18:36,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-21 15:18:36,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 845 transitions. [2021-12-21 15:18:36,096 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7386363636363636 [2021-12-21 15:18:36,097 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 845 transitions. [2021-12-21 15:18:36,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 845 transitions. [2021-12-21 15:18:36,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:36,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 845 transitions. [2021-12-21 15:18:36,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 76.81818181818181) internal successors, (845), 11 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:36,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:36,103 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:36,103 INFO L186 Difference]: Start difference. First operand has 200 places, 193 transitions, 1308 flow. Second operand 11 states and 845 transitions. [2021-12-21 15:18:36,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 440 transitions, 4362 flow [2021-12-21 15:18:36,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 440 transitions, 4276 flow, removed 33 selfloop flow, removed 7 redundant places. [2021-12-21 15:18:36,237 INFO L242 Difference]: Finished difference. Result has 204 places, 201 transitions, 1366 flow [2021-12-21 15:18:36,238 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1366, PETRI_PLACES=204, PETRI_TRANSITIONS=201} [2021-12-21 15:18:36,239 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 112 predicate places. [2021-12-21 15:18:36,239 INFO L470 AbstractCegarLoop]: Abstraction has has 204 places, 201 transitions, 1366 flow [2021-12-21 15:18:36,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.2) internal successors, (1053), 15 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:36,239 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:36,239 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:36,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 15:18:36,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:18:36,455 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:18:36,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:36,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1103714706, now seen corresponding path program 3 times [2021-12-21 15:18:36,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:36,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560608026] [2021-12-21 15:18:36,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:36,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:18:36,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:36,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560608026] [2021-12-21 15:18:36,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560608026] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:18:36,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058239717] [2021-12-21 15:18:36,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 15:18:36,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:18:36,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:18:36,585 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) [2021-12-21 15:18:36,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 15:18:36,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 15:18:36,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:18:36,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 15:18:36,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:18:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:18:36,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:18:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:18:37,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058239717] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:18:37,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:18:37,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2021-12-21 15:18:37,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996127562] [2021-12-21 15:18:37,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:18:37,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:18:37,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:37,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:18:37,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:18:37,081 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2021-12-21 15:18:37,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 201 transitions, 1366 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:37,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:37,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2021-12-21 15:18:37,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:37,847 INFO L129 PetriNetUnfolder]: 1059/4424 cut-off events. [2021-12-21 15:18:37,847 INFO L130 PetriNetUnfolder]: For 33809/34109 co-relation queries the response was YES. [2021-12-21 15:18:37,929 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19931 conditions, 4424 events. 1059/4424 cut-off events. For 33809/34109 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 43400 event pairs, 314 based on Foata normal form. 110/4379 useless extension candidates. Maximal degree in co-relation 19813. Up to 599 conditions per place. [2021-12-21 15:18:37,947 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 47 selfloop transitions, 23 changer transitions 4/234 dead transitions. [2021-12-21 15:18:37,947 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 234 transitions, 1669 flow [2021-12-21 15:18:37,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 15:18:37,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-21 15:18:37,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 843 transitions. [2021-12-21 15:18:37,948 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8105769230769231 [2021-12-21 15:18:37,948 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 843 transitions. [2021-12-21 15:18:37,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 843 transitions. [2021-12-21 15:18:37,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:37,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 843 transitions. [2021-12-21 15:18:37,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.3) internal successors, (843), 10 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:37,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:37,953 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:37,953 INFO L186 Difference]: Start difference. First operand has 204 places, 201 transitions, 1366 flow. Second operand 10 states and 843 transitions. [2021-12-21 15:18:37,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 234 transitions, 1669 flow [2021-12-21 15:18:38,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 234 transitions, 1599 flow, removed 25 selfloop flow, removed 6 redundant places. [2021-12-21 15:18:38,004 INFO L242 Difference]: Finished difference. Result has 210 places, 214 transitions, 1491 flow [2021-12-21 15:18:38,004 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1491, PETRI_PLACES=210, PETRI_TRANSITIONS=214} [2021-12-21 15:18:38,005 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 118 predicate places. [2021-12-21 15:18:38,005 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 214 transitions, 1491 flow [2021-12-21 15:18:38,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:38,006 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:38,006 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:38,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 15:18:38,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-21 15:18:38,220 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:18:38,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:38,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1223366174, now seen corresponding path program 4 times [2021-12-21 15:18:38,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:38,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392638882] [2021-12-21 15:18:38,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:38,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:18:38,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:38,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392638882] [2021-12-21 15:18:38,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392638882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:18:38,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200311794] [2021-12-21 15:18:38,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 15:18:38,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:18:38,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:18:38,320 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) [2021-12-21 15:18:38,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 15:18:38,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 15:18:38,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:18:38,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 15:18:38,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:18:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:18:38,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:18:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:18:38,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200311794] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:18:38,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:18:38,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2021-12-21 15:18:38,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182281810] [2021-12-21 15:18:38,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:18:38,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:18:38,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:38,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:18:38,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:18:38,767 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2021-12-21 15:18:38,767 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 214 transitions, 1491 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:38,767 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:38,768 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2021-12-21 15:18:38,768 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:39,534 INFO L129 PetriNetUnfolder]: 1185/4954 cut-off events. [2021-12-21 15:18:39,534 INFO L130 PetriNetUnfolder]: For 38316/38644 co-relation queries the response was YES. [2021-12-21 15:18:39,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22466 conditions, 4954 events. 1185/4954 cut-off events. For 38316/38644 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 50265 event pairs, 338 based on Foata normal form. 126/4910 useless extension candidates. Maximal degree in co-relation 22335. Up to 675 conditions per place. [2021-12-21 15:18:39,583 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 61 selfloop transitions, 23 changer transitions 4/248 dead transitions. [2021-12-21 15:18:39,583 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 248 transitions, 1830 flow [2021-12-21 15:18:39,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 15:18:39,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-21 15:18:39,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 843 transitions. [2021-12-21 15:18:39,584 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8105769230769231 [2021-12-21 15:18:39,585 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 843 transitions. [2021-12-21 15:18:39,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 843 transitions. [2021-12-21 15:18:39,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:39,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 843 transitions. [2021-12-21 15:18:39,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.3) internal successors, (843), 10 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:39,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:39,587 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:39,587 INFO L186 Difference]: Start difference. First operand has 210 places, 214 transitions, 1491 flow. Second operand 10 states and 843 transitions. [2021-12-21 15:18:39,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 248 transitions, 1830 flow [2021-12-21 15:18:39,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 248 transitions, 1801 flow, removed 10 selfloop flow, removed 5 redundant places. [2021-12-21 15:18:39,647 INFO L242 Difference]: Finished difference. Result has 217 places, 228 transitions, 1661 flow [2021-12-21 15:18:39,648 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1661, PETRI_PLACES=217, PETRI_TRANSITIONS=228} [2021-12-21 15:18:39,648 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 125 predicate places. [2021-12-21 15:18:39,648 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 228 transitions, 1661 flow [2021-12-21 15:18:39,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:39,648 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:39,649 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:39,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 15:18:39,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:18:39,863 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:18:39,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:39,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1902387016, now seen corresponding path program 5 times [2021-12-21 15:18:39,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:39,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853942088] [2021-12-21 15:18:39,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:39,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:18:39,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:39,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853942088] [2021-12-21 15:18:39,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853942088] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:18:39,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435654010] [2021-12-21 15:18:39,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 15:18:39,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:18:39,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:18:39,987 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) [2021-12-21 15:18:39,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 15:18:40,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-21 15:18:40,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:18:40,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 15:18:40,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:18:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:18:40,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:18:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:18:40,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435654010] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:18:40,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:18:40,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2021-12-21 15:18:40,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528866815] [2021-12-21 15:18:40,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:18:40,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 15:18:40,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:40,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 15:18:40,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-21 15:18:40,408 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2021-12-21 15:18:40,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 228 transitions, 1661 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:40,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:40,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2021-12-21 15:18:40,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:41,370 INFO L129 PetriNetUnfolder]: 1429/6168 cut-off events. [2021-12-21 15:18:41,370 INFO L130 PetriNetUnfolder]: For 50401/50842 co-relation queries the response was YES. [2021-12-21 15:18:41,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28610 conditions, 6168 events. 1429/6168 cut-off events. For 50401/50842 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 65914 event pairs, 394 based on Foata normal form. 233/6227 useless extension candidates. Maximal degree in co-relation 28450. Up to 717 conditions per place. [2021-12-21 15:18:41,444 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 51 selfloop transitions, 51 changer transitions 4/266 dead transitions. [2021-12-21 15:18:41,444 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 266 transitions, 2070 flow [2021-12-21 15:18:41,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 15:18:41,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-21 15:18:41,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 933 transitions. [2021-12-21 15:18:41,446 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8155594405594405 [2021-12-21 15:18:41,446 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 933 transitions. [2021-12-21 15:18:41,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 933 transitions. [2021-12-21 15:18:41,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:41,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 933 transitions. [2021-12-21 15:18:41,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.81818181818181) internal successors, (933), 11 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:41,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:41,448 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:41,449 INFO L186 Difference]: Start difference. First operand has 217 places, 228 transitions, 1661 flow. Second operand 11 states and 933 transitions. [2021-12-21 15:18:41,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 266 transitions, 2070 flow [2021-12-21 15:18:41,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 266 transitions, 2025 flow, removed 18 selfloop flow, removed 5 redundant places. [2021-12-21 15:18:41,640 INFO L242 Difference]: Finished difference. Result has 223 places, 240 transitions, 1869 flow [2021-12-21 15:18:41,640 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1630, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1869, PETRI_PLACES=223, PETRI_TRANSITIONS=240} [2021-12-21 15:18:41,641 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 131 predicate places. [2021-12-21 15:18:41,641 INFO L470 AbstractCegarLoop]: Abstraction has has 223 places, 240 transitions, 1869 flow [2021-12-21 15:18:41,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:41,642 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:41,642 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:41,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-21 15:18:41,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:18:41,855 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:18:41,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:41,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1115209364, now seen corresponding path program 6 times [2021-12-21 15:18:41,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:41,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818946356] [2021-12-21 15:18:41,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:41,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:42,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:18:42,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:42,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818946356] [2021-12-21 15:18:42,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818946356] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:18:42,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855404169] [2021-12-21 15:18:42,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 15:18:42,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:18:42,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:18:42,033 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) [2021-12-21 15:18:42,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 15:18:42,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-21 15:18:42,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:18:42,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 15:18:42,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:18:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:18:42,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:18:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:18:42,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855404169] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:18:42,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:18:42,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2021-12-21 15:18:42,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218625915] [2021-12-21 15:18:42,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:18:42,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 15:18:42,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:42,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 15:18:42,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-21 15:18:42,540 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2021-12-21 15:18:42,541 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 240 transitions, 1869 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:42,541 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:42,541 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2021-12-21 15:18:42,541 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:43,903 INFO L129 PetriNetUnfolder]: 1708/7358 cut-off events. [2021-12-21 15:18:43,903 INFO L130 PetriNetUnfolder]: For 62548/63055 co-relation queries the response was YES. [2021-12-21 15:18:43,949 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34571 conditions, 7358 events. 1708/7358 cut-off events. For 62548/63055 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 81641 event pairs, 517 based on Foata normal form. 166/7302 useless extension candidates. Maximal degree in co-relation 34384. Up to 905 conditions per place. [2021-12-21 15:18:43,973 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 89 selfloop transitions, 33 changer transitions 4/286 dead transitions. [2021-12-21 15:18:43,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 286 transitions, 2417 flow [2021-12-21 15:18:43,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 15:18:43,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-21 15:18:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 931 transitions. [2021-12-21 15:18:43,975 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8138111888111889 [2021-12-21 15:18:43,975 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 931 transitions. [2021-12-21 15:18:43,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 931 transitions. [2021-12-21 15:18:43,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:43,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 931 transitions. [2021-12-21 15:18:43,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.63636363636364) internal successors, (931), 11 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:43,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:43,977 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:43,978 INFO L186 Difference]: Start difference. First operand has 223 places, 240 transitions, 1869 flow. Second operand 11 states and 931 transitions. [2021-12-21 15:18:43,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 286 transitions, 2417 flow [2021-12-21 15:18:44,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 286 transitions, 2322 flow, removed 43 selfloop flow, removed 5 redundant places. [2021-12-21 15:18:44,085 INFO L242 Difference]: Finished difference. Result has 231 places, 260 transitions, 2120 flow [2021-12-21 15:18:44,085 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2120, PETRI_PLACES=231, PETRI_TRANSITIONS=260} [2021-12-21 15:18:44,086 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 139 predicate places. [2021-12-21 15:18:44,086 INFO L470 AbstractCegarLoop]: Abstraction has has 231 places, 260 transitions, 2120 flow [2021-12-21 15:18:44,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:44,086 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:44,086 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:44,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 15:18:44,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 15:18:44,299 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:18:44,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:44,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1068784864, now seen corresponding path program 7 times [2021-12-21 15:18:44,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:44,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265561256] [2021-12-21 15:18:44,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:44,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:18:44,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:44,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265561256] [2021-12-21 15:18:44,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265561256] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:18:44,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421840994] [2021-12-21 15:18:44,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 15:18:44,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:18:44,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:18:44,419 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) [2021-12-21 15:18:44,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 15:18:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:44,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 15:18:44,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:18:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:18:44,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:18:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:18:44,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421840994] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:18:44,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:18:44,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2021-12-21 15:18:44,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349505579] [2021-12-21 15:18:44,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:18:44,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 15:18:44,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:44,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 15:18:44,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-21 15:18:44,893 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2021-12-21 15:18:44,894 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 260 transitions, 2120 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:44,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:44,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2021-12-21 15:18:44,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:46,310 INFO L129 PetriNetUnfolder]: 1971/8435 cut-off events. [2021-12-21 15:18:46,310 INFO L130 PetriNetUnfolder]: For 72811/73612 co-relation queries the response was YES. [2021-12-21 15:18:46,367 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39859 conditions, 8435 events. 1971/8435 cut-off events. For 72811/73612 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 96510 event pairs, 561 based on Foata normal form. 370/8561 useless extension candidates. Maximal degree in co-relation 39653. Up to 999 conditions per place. [2021-12-21 15:18:46,397 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 77 selfloop transitions, 61 changer transitions 4/302 dead transitions. [2021-12-21 15:18:46,397 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 302 transitions, 2672 flow [2021-12-21 15:18:46,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 15:18:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-21 15:18:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 933 transitions. [2021-12-21 15:18:46,400 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8155594405594405 [2021-12-21 15:18:46,400 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 933 transitions. [2021-12-21 15:18:46,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 933 transitions. [2021-12-21 15:18:46,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:46,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 933 transitions. [2021-12-21 15:18:46,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.81818181818181) internal successors, (933), 11 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:46,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:46,403 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:46,403 INFO L186 Difference]: Start difference. First operand has 231 places, 260 transitions, 2120 flow. Second operand 11 states and 933 transitions. [2021-12-21 15:18:46,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 302 transitions, 2672 flow [2021-12-21 15:18:46,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 302 transitions, 2589 flow, removed 37 selfloop flow, removed 5 redundant places. [2021-12-21 15:18:46,537 INFO L242 Difference]: Finished difference. Result has 240 places, 276 transitions, 2462 flow [2021-12-21 15:18:46,537 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2067, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2462, PETRI_PLACES=240, PETRI_TRANSITIONS=276} [2021-12-21 15:18:46,537 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 148 predicate places. [2021-12-21 15:18:46,537 INFO L470 AbstractCegarLoop]: Abstraction has has 240 places, 276 transitions, 2462 flow [2021-12-21 15:18:46,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:46,538 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:46,538 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:46,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 15:18:46,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-21 15:18:46,745 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:18:46,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:46,746 INFO L85 PathProgramCache]: Analyzing trace with hash -264766159, now seen corresponding path program 8 times [2021-12-21 15:18:46,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:46,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829679754] [2021-12-21 15:18:46,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:46,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:46,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:47,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:47,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829679754] [2021-12-21 15:18:47,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829679754] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:18:47,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657608476] [2021-12-21 15:18:47,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:18:47,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:18:47,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:18:47,179 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) [2021-12-21 15:18:47,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 15:18:47,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:18:47,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:18:47,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-21 15:18:47,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:18:49,088 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:49,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:18:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:18:55,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657608476] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:18:55,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:18:55,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 40 [2021-12-21 15:18:55,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973511853] [2021-12-21 15:18:55,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:18:55,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-21 15:18:55,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:55,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-21 15:18:55,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1319, Unknown=1, NotChecked=0, Total=1560 [2021-12-21 15:18:55,571 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2021-12-21 15:18:55,572 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 276 transitions, 2462 flow. Second operand has 40 states, 40 states have (on average 65.725) internal successors, (2629), 40 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:55,572 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:55,572 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2021-12-21 15:18:55,573 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand