./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-figure1-alt.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/popl20-figure1-alt.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 fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:20:24,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:20:24,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:20:24,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:20:24,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:20:24,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:20:24,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:20:24,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:20:24,306 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:20:24,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:20:24,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:20:24,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:20:24,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:20:24,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:20:24,315 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:20:24,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:20:24,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:20:24,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:20:24,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:20:24,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:20:24,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:20:24,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:20:24,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:20:24,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:20:24,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:20:24,331 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:20:24,332 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:20:24,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:20:24,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:20:24,334 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:20:24,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:20:24,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:20:24,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:20:24,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:20:24,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:20:24,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:20:24,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:20:24,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:20:24,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:20:24,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:20:24,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:20:24,340 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 15:20:24,363 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:20:24,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:20:24,368 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:20:24,368 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:20:24,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:20:24,369 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:20:24,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:20:24,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:20:24,369 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:20:24,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:20:24,370 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 15:20:24,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:20:24,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 15:20:24,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:20:24,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:20:24,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:20:24,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:20:24,371 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 15:20:24,371 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:20:24,371 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:20:24,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:20:24,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:20:24,372 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:20:24,372 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:20:24,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:20:24,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:20:24,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:20:24,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:20:24,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:20:24,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:20:24,373 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:20:24,373 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:20:24,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:20:24,374 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:20:24,374 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 [2021-12-21 15:20:24,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:20:24,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:20:24,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:20:24,568 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:20:24,569 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:20:24,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2021-12-21 15:20:24,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33b50dd65/8c2533957b0e4e1ba1893e091c9e4caa/FLAG5f3329f85 [2021-12-21 15:20:24,975 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:20:24,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2021-12-21 15:20:24,983 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33b50dd65/8c2533957b0e4e1ba1893e091c9e4caa/FLAG5f3329f85 [2021-12-21 15:20:24,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33b50dd65/8c2533957b0e4e1ba1893e091c9e4caa [2021-12-21 15:20:24,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:20:24,998 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:20:24,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:20:24,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:20:25,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:20:25,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:20:24" (1/1) ... [2021-12-21 15:20:25,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@216a207d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:20:25, skipping insertion in model container [2021-12-21 15:20:25,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:20:24" (1/1) ... [2021-12-21 15:20:25,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:20:25,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:20:25,169 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/popl20-figure1-alt.wvr.c[2087,2100] [2021-12-21 15:20:25,171 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:20:25,176 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:20:25,187 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/popl20-figure1-alt.wvr.c[2087,2100] [2021-12-21 15:20:25,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:20:25,197 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:20:25,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:20:25 WrapperNode [2021-12-21 15:20:25,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:20:25,198 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:20:25,198 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:20:25,198 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:20:25,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:20:25" (1/1) ... [2021-12-21 15:20:25,208 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:20:25" (1/1) ... [2021-12-21 15:20:25,220 INFO L137 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2021-12-21 15:20:25,221 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:20:25,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:20:25,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:20:25,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:20:25,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:20:25" (1/1) ... [2021-12-21 15:20:25,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:20:25" (1/1) ... [2021-12-21 15:20:25,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:20:25" (1/1) ... [2021-12-21 15:20:25,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:20:25" (1/1) ... [2021-12-21 15:20:25,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:20:25" (1/1) ... [2021-12-21 15:20:25,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:20:25" (1/1) ... [2021-12-21 15:20:25,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:20:25" (1/1) ... [2021-12-21 15:20:25,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:20:25,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:20:25,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:20:25,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:20:25,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:20:25" (1/1) ... [2021-12-21 15:20:25,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:20:25,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:20:25,261 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 15:20:25,268 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 15:20:25,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:20:25,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-21 15:20:25,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-21 15:20:25,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-21 15:20:25,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-21 15:20:25,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:20:25,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:20:25,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:20:25,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-21 15:20:25,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-21 15:20:25,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:20:25,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:20:25,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:20:25,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:20:25,300 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 15:20:25,348 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:20:25,349 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:20:25,455 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:20:25,480 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:20:25,480 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 15:20:25,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:20:25 BoogieIcfgContainer [2021-12-21 15:20:25,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:20:25,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:20:25,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:20:25,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:20:25,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:20:24" (1/3) ... [2021-12-21 15:20:25,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194545bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:20:25, skipping insertion in model container [2021-12-21 15:20:25,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:20:25" (2/3) ... [2021-12-21 15:20:25,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194545bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:20:25, skipping insertion in model container [2021-12-21 15:20:25,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:20:25" (3/3) ... [2021-12-21 15:20:25,499 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2021-12-21 15:20:25,502 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-21 15:20:25,502 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:20:25,503 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:20:25,503 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-21 15:20:25,533 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,533 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,538 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,538 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,542 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,543 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,543 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,544 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,544 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,544 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,555 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,555 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,555 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,555 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,556 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,556 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,556 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,556 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,556 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,556 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,556 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,556 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,557 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,557 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,557 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,557 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,557 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,558 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,558 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,558 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,558 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,558 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,558 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,558 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,559 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,559 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,559 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,559 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,566 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,567 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,567 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,567 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,567 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,567 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,567 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,567 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,571 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,571 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,571 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,571 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,571 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:20:25,574 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-21 15:20:25,626 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:20:25,631 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 15:20:25,631 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-21 15:20:25,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 194 flow [2021-12-21 15:20:25,672 INFO L129 PetriNetUnfolder]: 6/87 cut-off events. [2021-12-21 15:20:25,672 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-21 15:20:25,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2021-12-21 15:20:25,675 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 194 flow [2021-12-21 15:20:25,678 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 78 transitions, 168 flow [2021-12-21 15:20:25,691 INFO L129 PetriNetUnfolder]: 6/77 cut-off events. [2021-12-21 15:20:25,691 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-21 15:20:25,692 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:25,692 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] [2021-12-21 15:20:25,693 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:20:25,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:25,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1515800342, now seen corresponding path program 1 times [2021-12-21 15:20:25,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:25,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796562986] [2021-12-21 15:20:25,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:25,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:25,891 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 15:20:25,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:25,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796562986] [2021-12-21 15:20:25,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796562986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:20:25,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:20:25,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 15:20:25,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536938264] [2021-12-21 15:20:25,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:20:25,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 15:20:25,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:25,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 15:20:25,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 15:20:25,936 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 89 [2021-12-21 15:20:25,940 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 168 flow. Second operand has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 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 15:20:25,940 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:25,940 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 89 [2021-12-21 15:20:25,941 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:26,001 INFO L129 PetriNetUnfolder]: 11/107 cut-off events. [2021-12-21 15:20:26,002 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2021-12-21 15:20:26,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 107 events. 11/107 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 146 event pairs, 3 based on Foata normal form. 11/109 useless extension candidates. Maximal degree in co-relation 67. Up to 19 conditions per place. [2021-12-21 15:20:26,006 INFO L132 encePairwiseOnDemand]: 85/89 looper letters, 6 selfloop transitions, 0 changer transitions 2/74 dead transitions. [2021-12-21 15:20:26,006 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 172 flow [2021-12-21 15:20:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 15:20:26,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-21 15:20:26,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 166 transitions. [2021-12-21 15:20:26,016 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9325842696629213 [2021-12-21 15:20:26,017 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 166 transitions. [2021-12-21 15:20:26,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 166 transitions. [2021-12-21 15:20:26,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:26,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 166 transitions. [2021-12-21 15:20:26,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 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 15:20:26,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 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 15:20:26,028 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 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 15:20:26,030 INFO L186 Difference]: Start difference. First operand has 79 places, 78 transitions, 168 flow. Second operand 2 states and 166 transitions. [2021-12-21 15:20:26,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 172 flow [2021-12-21 15:20:26,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-21 15:20:26,037 INFO L242 Difference]: Finished difference. Result has 76 places, 72 transitions, 148 flow [2021-12-21 15:20:26,038 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=148, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2021-12-21 15:20:26,042 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2021-12-21 15:20:26,043 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 148 flow [2021-12-21 15:20:26,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 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 15:20:26,043 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:26,043 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] [2021-12-21 15:20:26,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:20:26,044 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:20:26,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:26,045 INFO L85 PathProgramCache]: Analyzing trace with hash -79113043, now seen corresponding path program 1 times [2021-12-21 15:20:26,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:26,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640334102] [2021-12-21 15:20:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:26,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:26,634 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 15:20:26,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:26,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640334102] [2021-12-21 15:20:26,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640334102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:20:26,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:20:26,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-21 15:20:26,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832801078] [2021-12-21 15:20:26,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:20:26,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 15:20:26,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:26,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 15:20:26,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-21 15:20:26,638 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-21 15:20:26,639 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 148 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 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 15:20:26,639 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:26,639 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-21 15:20:26,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:26,991 INFO L129 PetriNetUnfolder]: 67/248 cut-off events. [2021-12-21 15:20:26,992 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-12-21 15:20:26,993 INFO L84 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 248 events. 67/248 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 955 event pairs, 34 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 417. Up to 102 conditions per place. [2021-12-21 15:20:26,995 INFO L132 encePairwiseOnDemand]: 76/89 looper letters, 43 selfloop transitions, 11 changer transitions 6/103 dead transitions. [2021-12-21 15:20:26,995 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 337 flow [2021-12-21 15:20:26,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 15:20:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-21 15:20:27,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 698 transitions. [2021-12-21 15:20:27,018 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.653558052434457 [2021-12-21 15:20:27,018 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 698 transitions. [2021-12-21 15:20:27,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 698 transitions. [2021-12-21 15:20:27,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:27,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 698 transitions. [2021-12-21 15:20:27,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.166666666666664) internal successors, (698), 12 states have internal predecessors, (698), 0 states have call successors, (0), 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 15:20:27,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 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 15:20:27,024 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 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 15:20:27,024 INFO L186 Difference]: Start difference. First operand has 76 places, 72 transitions, 148 flow. Second operand 12 states and 698 transitions. [2021-12-21 15:20:27,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 337 flow [2021-12-21 15:20:27,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 103 transitions, 337 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-21 15:20:27,026 INFO L242 Difference]: Finished difference. Result has 92 places, 79 transitions, 213 flow [2021-12-21 15:20:27,026 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=213, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2021-12-21 15:20:27,027 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 13 predicate places. [2021-12-21 15:20:27,027 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 213 flow [2021-12-21 15:20:27,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 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 15:20:27,028 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:27,028 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] [2021-12-21 15:20:27,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 15:20:27,028 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:20:27,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:27,029 INFO L85 PathProgramCache]: Analyzing trace with hash -42932599, now seen corresponding path program 2 times [2021-12-21 15:20:27,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:27,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534348793] [2021-12-21 15:20:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:27,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:27,333 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 15:20:27,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:27,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534348793] [2021-12-21 15:20:27,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534348793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:20:27,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:20:27,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-21 15:20:27,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268310795] [2021-12-21 15:20:27,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:20:27,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 15:20:27,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:27,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 15:20:27,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-21 15:20:27,339 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-21 15:20:27,340 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 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 15:20:27,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:27,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-21 15:20:27,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:27,622 INFO L129 PetriNetUnfolder]: 68/264 cut-off events. [2021-12-21 15:20:27,622 INFO L130 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2021-12-21 15:20:27,623 INFO L84 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 264 events. 68/264 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1119 event pairs, 36 based on Foata normal form. 1/262 useless extension candidates. Maximal degree in co-relation 531. Up to 102 conditions per place. [2021-12-21 15:20:27,624 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 40 selfloop transitions, 11 changer transitions 11/105 dead transitions. [2021-12-21 15:20:27,624 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 105 transitions, 429 flow [2021-12-21 15:20:27,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 15:20:27,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-21 15:20:27,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 695 transitions. [2021-12-21 15:20:27,626 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.650749063670412 [2021-12-21 15:20:27,626 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 695 transitions. [2021-12-21 15:20:27,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 695 transitions. [2021-12-21 15:20:27,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:27,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 695 transitions. [2021-12-21 15:20:27,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 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 15:20:27,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 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 15:20:27,630 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 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 15:20:27,630 INFO L186 Difference]: Start difference. First operand has 92 places, 79 transitions, 213 flow. Second operand 12 states and 695 transitions. [2021-12-21 15:20:27,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 105 transitions, 429 flow [2021-12-21 15:20:27,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 105 transitions, 407 flow, removed 8 selfloop flow, removed 6 redundant places. [2021-12-21 15:20:27,634 INFO L242 Difference]: Finished difference. Result has 100 places, 80 transitions, 247 flow [2021-12-21 15:20:27,634 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=247, PETRI_PLACES=100, PETRI_TRANSITIONS=80} [2021-12-21 15:20:27,634 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 21 predicate places. [2021-12-21 15:20:27,635 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 80 transitions, 247 flow [2021-12-21 15:20:27,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 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 15:20:27,635 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:27,635 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] [2021-12-21 15:20:27,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 15:20:27,636 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:20:27,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:27,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1623942775, now seen corresponding path program 3 times [2021-12-21 15:20:27,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:27,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369855121] [2021-12-21 15:20:27,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:27,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:27,890 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 15:20:27,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:27,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369855121] [2021-12-21 15:20:27,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369855121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:20:27,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:20:27,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-21 15:20:27,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330951011] [2021-12-21 15:20:27,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:20:27,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 15:20:27,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:27,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 15:20:27,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-12-21 15:20:27,893 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-21 15:20:27,893 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 80 transitions, 247 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 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 15:20:27,893 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:27,893 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-21 15:20:27,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:28,201 INFO L129 PetriNetUnfolder]: 72/299 cut-off events. [2021-12-21 15:20:28,201 INFO L130 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2021-12-21 15:20:28,202 INFO L84 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 299 events. 72/299 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1369 event pairs, 41 based on Foata normal form. 1/295 useless extension candidates. Maximal degree in co-relation 655. Up to 105 conditions per place. [2021-12-21 15:20:28,203 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 48 selfloop transitions, 14 changer transitions 8/113 dead transitions. [2021-12-21 15:20:28,203 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 519 flow [2021-12-21 15:20:28,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 15:20:28,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-21 15:20:28,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 704 transitions. [2021-12-21 15:20:28,205 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6591760299625468 [2021-12-21 15:20:28,205 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 704 transitions. [2021-12-21 15:20:28,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 704 transitions. [2021-12-21 15:20:28,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:28,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 704 transitions. [2021-12-21 15:20:28,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.666666666666664) internal successors, (704), 12 states have internal predecessors, (704), 0 states have call successors, (0), 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 15:20:28,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 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 15:20:28,208 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 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 15:20:28,208 INFO L186 Difference]: Start difference. First operand has 100 places, 80 transitions, 247 flow. Second operand 12 states and 704 transitions. [2021-12-21 15:20:28,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 519 flow [2021-12-21 15:20:28,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 113 transitions, 474 flow, removed 14 selfloop flow, removed 9 redundant places. [2021-12-21 15:20:28,211 INFO L242 Difference]: Finished difference. Result has 104 places, 84 transitions, 301 flow [2021-12-21 15:20:28,211 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=301, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2021-12-21 15:20:28,212 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 25 predicate places. [2021-12-21 15:20:28,212 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 301 flow [2021-12-21 15:20:28,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 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 15:20:28,212 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:28,212 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] [2021-12-21 15:20:28,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 15:20:28,213 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:20:28,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:28,213 INFO L85 PathProgramCache]: Analyzing trace with hash -211036747, now seen corresponding path program 4 times [2021-12-21 15:20:28,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:28,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082919043] [2021-12-21 15:20:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:28,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:28,488 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 15:20:28,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:28,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082919043] [2021-12-21 15:20:28,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082919043] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:20:28,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:20:28,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-21 15:20:28,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728010040] [2021-12-21 15:20:28,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:20:28,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 15:20:28,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:28,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 15:20:28,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-12-21 15:20:28,491 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-21 15:20:28,492 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 301 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 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 15:20:28,492 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:28,492 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-21 15:20:28,492 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:28,799 INFO L129 PetriNetUnfolder]: 71/291 cut-off events. [2021-12-21 15:20:28,799 INFO L130 PetriNetUnfolder]: For 218/218 co-relation queries the response was YES. [2021-12-21 15:20:28,800 INFO L84 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 291 events. 71/291 cut-off events. For 218/218 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1313 event pairs, 34 based on Foata normal form. 1/286 useless extension candidates. Maximal degree in co-relation 664. Up to 105 conditions per place. [2021-12-21 15:20:28,801 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 50 selfloop transitions, 15 changer transitions 6/114 dead transitions. [2021-12-21 15:20:28,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 114 transitions, 559 flow [2021-12-21 15:20:28,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 15:20:28,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-21 15:20:28,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 703 transitions. [2021-12-21 15:20:28,803 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6582397003745318 [2021-12-21 15:20:28,803 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 703 transitions. [2021-12-21 15:20:28,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 703 transitions. [2021-12-21 15:20:28,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:28,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 703 transitions. [2021-12-21 15:20:28,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.583333333333336) internal successors, (703), 12 states have internal predecessors, (703), 0 states have call successors, (0), 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 15:20:28,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 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 15:20:28,806 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 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 15:20:28,806 INFO L186 Difference]: Start difference. First operand has 104 places, 84 transitions, 301 flow. Second operand 12 states and 703 transitions. [2021-12-21 15:20:28,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 114 transitions, 559 flow [2021-12-21 15:20:28,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 114 transitions, 520 flow, removed 11 selfloop flow, removed 8 redundant places. [2021-12-21 15:20:28,810 INFO L242 Difference]: Finished difference. Result has 110 places, 86 transitions, 352 flow [2021-12-21 15:20:28,810 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=352, PETRI_PLACES=110, PETRI_TRANSITIONS=86} [2021-12-21 15:20:28,810 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 31 predicate places. [2021-12-21 15:20:28,811 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 86 transitions, 352 flow [2021-12-21 15:20:28,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 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 15:20:28,811 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:28,811 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] [2021-12-21 15:20:28,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 15:20:28,812 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:20:28,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:28,812 INFO L85 PathProgramCache]: Analyzing trace with hash -773440099, now seen corresponding path program 5 times [2021-12-21 15:20:28,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:28,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469754284] [2021-12-21 15:20:28,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:28,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:29,060 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 15:20:29,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:29,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469754284] [2021-12-21 15:20:29,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469754284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:20:29,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:20:29,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-21 15:20:29,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058052926] [2021-12-21 15:20:29,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:20:29,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 15:20:29,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:29,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 15:20:29,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-21 15:20:29,063 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-21 15:20:29,063 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 86 transitions, 352 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 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 15:20:29,063 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:29,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-21 15:20:29,064 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:29,344 INFO L129 PetriNetUnfolder]: 71/283 cut-off events. [2021-12-21 15:20:29,344 INFO L130 PetriNetUnfolder]: For 320/332 co-relation queries the response was YES. [2021-12-21 15:20:29,345 INFO L84 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 283 events. 71/283 cut-off events. For 320/332 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1260 event pairs, 34 based on Foata normal form. 4/282 useless extension candidates. Maximal degree in co-relation 676. Up to 105 conditions per place. [2021-12-21 15:20:29,346 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 42 selfloop transitions, 14 changer transitions 9/108 dead transitions. [2021-12-21 15:20:29,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 563 flow [2021-12-21 15:20:29,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 15:20:29,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-21 15:20:29,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 696 transitions. [2021-12-21 15:20:29,348 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.651685393258427 [2021-12-21 15:20:29,348 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 696 transitions. [2021-12-21 15:20:29,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 696 transitions. [2021-12-21 15:20:29,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:29,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 696 transitions. [2021-12-21 15:20:29,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 0 states have call successors, (0), 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 15:20:29,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 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 15:20:29,351 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 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 15:20:29,351 INFO L186 Difference]: Start difference. First operand has 110 places, 86 transitions, 352 flow. Second operand 12 states and 696 transitions. [2021-12-21 15:20:29,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 563 flow [2021-12-21 15:20:29,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 526 flow, removed 10 selfloop flow, removed 8 redundant places. [2021-12-21 15:20:29,354 INFO L242 Difference]: Finished difference. Result has 115 places, 86 transitions, 368 flow [2021-12-21 15:20:29,354 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=368, PETRI_PLACES=115, PETRI_TRANSITIONS=86} [2021-12-21 15:20:29,354 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 36 predicate places. [2021-12-21 15:20:29,355 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 86 transitions, 368 flow [2021-12-21 15:20:29,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 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 15:20:29,355 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:29,355 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] [2021-12-21 15:20:29,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 15:20:29,355 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:20:29,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:29,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1009642839, now seen corresponding path program 6 times [2021-12-21 15:20:29,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:29,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638576545] [2021-12-21 15:20:29,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:29,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:29,643 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 15:20:29,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:29,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638576545] [2021-12-21 15:20:29,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638576545] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:20:29,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:20:29,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-21 15:20:29,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363769691] [2021-12-21 15:20:29,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:20:29,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 15:20:29,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:29,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 15:20:29,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-21 15:20:29,645 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-21 15:20:29,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 86 transitions, 368 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 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 15:20:29,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:29,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-21 15:20:29,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:29,937 INFO L129 PetriNetUnfolder]: 68/248 cut-off events. [2021-12-21 15:20:29,938 INFO L130 PetriNetUnfolder]: For 320/320 co-relation queries the response was YES. [2021-12-21 15:20:29,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 248 events. 68/248 cut-off events. For 320/320 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 972 event pairs, 34 based on Foata normal form. 1/244 useless extension candidates. Maximal degree in co-relation 618. Up to 105 conditions per place. [2021-12-21 15:20:29,940 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 34 selfloop transitions, 14 changer transitions 11/102 dead transitions. [2021-12-21 15:20:29,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 102 transitions, 547 flow [2021-12-21 15:20:29,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 15:20:29,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-21 15:20:29,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 690 transitions. [2021-12-21 15:20:29,942 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6460674157303371 [2021-12-21 15:20:29,942 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 690 transitions. [2021-12-21 15:20:29,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 690 transitions. [2021-12-21 15:20:29,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:29,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 690 transitions. [2021-12-21 15:20:29,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.5) internal successors, (690), 12 states have internal predecessors, (690), 0 states have call successors, (0), 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 15:20:29,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 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 15:20:29,946 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 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 15:20:29,946 INFO L186 Difference]: Start difference. First operand has 115 places, 86 transitions, 368 flow. Second operand 12 states and 690 transitions. [2021-12-21 15:20:29,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 102 transitions, 547 flow [2021-12-21 15:20:29,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 102 transitions, 499 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-12-21 15:20:29,949 INFO L242 Difference]: Finished difference. Result has 114 places, 85 transitions, 350 flow [2021-12-21 15:20:29,949 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=350, PETRI_PLACES=114, PETRI_TRANSITIONS=85} [2021-12-21 15:20:29,950 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 35 predicate places. [2021-12-21 15:20:29,950 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 85 transitions, 350 flow [2021-12-21 15:20:29,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 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 15:20:29,950 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:29,951 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] [2021-12-21 15:20:29,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 15:20:29,951 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:20:29,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:29,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1492579821, now seen corresponding path program 1 times [2021-12-21 15:20:29,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:29,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386517698] [2021-12-21 15:20:29,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:29,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:30,148 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 15:20:30,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:30,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386517698] [2021-12-21 15:20:30,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386517698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:20:30,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790941540] [2021-12-21 15:20:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:30,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:20:30,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:20:30,150 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 15:20:30,191 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 15:20:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:30,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 15:20:30,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:20:30,787 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 15:20:30,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:20:31,320 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 15:20:31,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790941540] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:20:31,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:20:31,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-21 15:20:31,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623223013] [2021-12-21 15:20:31,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:20:31,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-21 15:20:31,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:31,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-21 15:20:31,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-12-21 15:20:31,324 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-21 15:20:31,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 85 transitions, 350 flow. Second operand has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 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 15:20:31,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:31,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-21 15:20:31,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:32,925 INFO L129 PetriNetUnfolder]: 168/592 cut-off events. [2021-12-21 15:20:32,925 INFO L130 PetriNetUnfolder]: For 377/377 co-relation queries the response was YES. [2021-12-21 15:20:32,927 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1318 conditions, 592 events. 168/592 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3253 event pairs, 9 based on Foata normal form. 13/605 useless extension candidates. Maximal degree in co-relation 1297. Up to 111 conditions per place. [2021-12-21 15:20:32,928 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 114 selfloop transitions, 82 changer transitions 13/251 dead transitions. [2021-12-21 15:20:32,929 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 251 transitions, 1334 flow [2021-12-21 15:20:32,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-21 15:20:32,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-12-21 15:20:32,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2702 transitions. [2021-12-21 15:20:32,934 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6324906367041199 [2021-12-21 15:20:32,934 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2702 transitions. [2021-12-21 15:20:32,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2702 transitions. [2021-12-21 15:20:32,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:32,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2702 transitions. [2021-12-21 15:20:32,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 56.291666666666664) internal successors, (2702), 48 states have internal predecessors, (2702), 0 states have call successors, (0), 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 15:20:32,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 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 15:20:32,945 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 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 15:20:32,945 INFO L186 Difference]: Start difference. First operand has 114 places, 85 transitions, 350 flow. Second operand 48 states and 2702 transitions. [2021-12-21 15:20:32,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 251 transitions, 1334 flow [2021-12-21 15:20:32,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 251 transitions, 1228 flow, removed 24 selfloop flow, removed 16 redundant places. [2021-12-21 15:20:32,950 INFO L242 Difference]: Finished difference. Result has 152 places, 152 transitions, 752 flow [2021-12-21 15:20:32,950 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=752, PETRI_PLACES=152, PETRI_TRANSITIONS=152} [2021-12-21 15:20:32,950 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 73 predicate places. [2021-12-21 15:20:32,951 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 152 transitions, 752 flow [2021-12-21 15:20:32,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 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 15:20:32,951 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:32,952 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] [2021-12-21 15:20:32,988 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 15:20:33,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:20:33,171 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:20:33,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:33,172 INFO L85 PathProgramCache]: Analyzing trace with hash 330352477, now seen corresponding path program 2 times [2021-12-21 15:20:33,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:33,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407926963] [2021-12-21 15:20:33,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:33,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:33,380 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 15:20:33,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:33,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407926963] [2021-12-21 15:20:33,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407926963] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:20:33,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046511902] [2021-12-21 15:20:33,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:20:33,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:20:33,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:20:33,382 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 15:20:33,383 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 15:20:33,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:20:33,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:20:33,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 15:20:33,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:20:33,916 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 15:20:33,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:20:34,416 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 15:20:34,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046511902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:20:34,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:20:34,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-21 15:20:34,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112575125] [2021-12-21 15:20:34,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:20:34,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-21 15:20:34,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:34,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-21 15:20:34,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-12-21 15:20:34,419 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-21 15:20:34,421 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 152 transitions, 752 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 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 15:20:34,421 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:34,421 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-21 15:20:34,421 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:35,568 INFO L129 PetriNetUnfolder]: 210/752 cut-off events. [2021-12-21 15:20:35,568 INFO L130 PetriNetUnfolder]: For 677/677 co-relation queries the response was YES. [2021-12-21 15:20:35,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2086 conditions, 752 events. 210/752 cut-off events. For 677/677 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4583 event pairs, 22 based on Foata normal form. 1/751 useless extension candidates. Maximal degree in co-relation 2061. Up to 213 conditions per place. [2021-12-21 15:20:35,572 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 100 selfloop transitions, 122 changer transitions 6/270 dead transitions. [2021-12-21 15:20:35,572 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 270 transitions, 1798 flow [2021-12-21 15:20:35,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-21 15:20:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-21 15:20:35,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2186 transitions. [2021-12-21 15:20:35,576 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6297896859694613 [2021-12-21 15:20:35,576 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2186 transitions. [2021-12-21 15:20:35,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2186 transitions. [2021-12-21 15:20:35,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:35,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2186 transitions. [2021-12-21 15:20:35,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.05128205128205) internal successors, (2186), 39 states have internal predecessors, (2186), 0 states have call successors, (0), 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 15:20:35,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 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 15:20:35,587 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 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 15:20:35,587 INFO L186 Difference]: Start difference. First operand has 152 places, 152 transitions, 752 flow. Second operand 39 states and 2186 transitions. [2021-12-21 15:20:35,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 270 transitions, 1798 flow [2021-12-21 15:20:35,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 270 transitions, 1645 flow, removed 61 selfloop flow, removed 9 redundant places. [2021-12-21 15:20:35,601 INFO L242 Difference]: Finished difference. Result has 186 places, 205 transitions, 1291 flow [2021-12-21 15:20:35,601 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1291, PETRI_PLACES=186, PETRI_TRANSITIONS=205} [2021-12-21 15:20:35,602 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 107 predicate places. [2021-12-21 15:20:35,603 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 205 transitions, 1291 flow [2021-12-21 15:20:35,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 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 15:20:35,604 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:35,604 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] [2021-12-21 15:20:35,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 15:20:35,820 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,SelfDestructingSolverStorable8 [2021-12-21 15:20:35,821 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:20:35,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:35,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1508892007, now seen corresponding path program 3 times [2021-12-21 15:20:35,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:35,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886595583] [2021-12-21 15:20:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:35,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:36,003 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 15:20:36,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:36,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886595583] [2021-12-21 15:20:36,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886595583] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:20:36,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473249460] [2021-12-21 15:20:36,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 15:20:36,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:20:36,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:20:36,005 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 15:20:36,005 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 15:20:36,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-21 15:20:36,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:20:36,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 15:20:36,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:20:36,606 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 15:20:36,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:20:37,152 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 15:20:37,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473249460] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:20:37,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:20:37,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-21 15:20:37,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774883042] [2021-12-21 15:20:37,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:20:37,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-21 15:20:37,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:37,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-21 15:20:37,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2021-12-21 15:20:37,155 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-21 15:20:37,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 205 transitions, 1291 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 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 15:20:37,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:37,156 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-21 15:20:37,156 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:40,787 INFO L129 PetriNetUnfolder]: 280/1042 cut-off events. [2021-12-21 15:20:40,787 INFO L130 PetriNetUnfolder]: For 1438/1440 co-relation queries the response was YES. [2021-12-21 15:20:40,789 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3193 conditions, 1042 events. 280/1042 cut-off events. For 1438/1440 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7246 event pairs, 21 based on Foata normal form. 3/1033 useless extension candidates. Maximal degree in co-relation 3162. Up to 147 conditions per place. [2021-12-21 15:20:40,793 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 158 selfloop transitions, 208 changer transitions 6/414 dead transitions. [2021-12-21 15:20:40,793 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 414 transitions, 3181 flow [2021-12-21 15:20:40,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-21 15:20:40,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-12-21 15:20:40,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4518 transitions. [2021-12-21 15:20:40,807 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6267166042446941 [2021-12-21 15:20:40,807 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4518 transitions. [2021-12-21 15:20:40,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4518 transitions. [2021-12-21 15:20:40,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:40,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4518 transitions. [2021-12-21 15:20:40,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.77777777777778) internal successors, (4518), 81 states have internal predecessors, (4518), 0 states have call successors, (0), 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 15:20:40,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 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 15:20:40,828 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 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 15:20:40,828 INFO L186 Difference]: Start difference. First operand has 186 places, 205 transitions, 1291 flow. Second operand 81 states and 4518 transitions. [2021-12-21 15:20:40,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 414 transitions, 3181 flow [2021-12-21 15:20:40,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 414 transitions, 3132 flow, removed 18 selfloop flow, removed 8 redundant places. [2021-12-21 15:20:40,840 INFO L242 Difference]: Finished difference. Result has 271 places, 286 transitions, 2375 flow [2021-12-21 15:20:40,840 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=2375, PETRI_PLACES=271, PETRI_TRANSITIONS=286} [2021-12-21 15:20:40,840 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 192 predicate places. [2021-12-21 15:20:40,840 INFO L470 AbstractCegarLoop]: Abstraction has has 271 places, 286 transitions, 2375 flow [2021-12-21 15:20:40,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 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 15:20:40,841 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:40,842 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] [2021-12-21 15:20:40,859 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 15:20:41,044 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 15:20:41,044 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:20:41,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:41,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1951911381, now seen corresponding path program 4 times [2021-12-21 15:20:41,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:41,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422226420] [2021-12-21 15:20:41,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:41,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:41,256 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 15:20:41,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:41,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422226420] [2021-12-21 15:20:41,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422226420] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:20:41,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010036929] [2021-12-21 15:20:41,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 15:20:41,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:20:41,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:20:41,258 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 15:20:41,258 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 15:20:41,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 15:20:41,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:20:41,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 15:20:41,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:20:41,826 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 15:20:41,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:20:42,318 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 15:20:42,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010036929] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:20:42,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:20:42,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-21 15:20:42,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85708270] [2021-12-21 15:20:42,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:20:42,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-21 15:20:42,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:42,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-21 15:20:42,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2021-12-21 15:20:42,320 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-21 15:20:42,321 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 286 transitions, 2375 flow. Second operand has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 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 15:20:42,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:42,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-21 15:20:42,322 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:45,458 INFO L129 PetriNetUnfolder]: 299/1078 cut-off events. [2021-12-21 15:20:45,458 INFO L130 PetriNetUnfolder]: For 4304/4306 co-relation queries the response was YES. [2021-12-21 15:20:45,462 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4343 conditions, 1078 events. 299/1078 cut-off events. For 4304/4306 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7557 event pairs, 19 based on Foata normal form. 3/1070 useless extension candidates. Maximal degree in co-relation 4298. Up to 157 conditions per place. [2021-12-21 15:20:45,480 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 165 selfloop transitions, 232 changer transitions 6/445 dead transitions. [2021-12-21 15:20:45,480 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 445 transitions, 4361 flow [2021-12-21 15:20:45,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-21 15:20:45,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-12-21 15:20:45,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4528 transitions. [2021-12-21 15:20:45,484 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6281037591899015 [2021-12-21 15:20:45,484 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4528 transitions. [2021-12-21 15:20:45,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4528 transitions. [2021-12-21 15:20:45,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:45,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4528 transitions. [2021-12-21 15:20:45,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.901234567901234) internal successors, (4528), 81 states have internal predecessors, (4528), 0 states have call successors, (0), 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 15:20:45,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 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 15:20:45,496 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 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 15:20:45,496 INFO L186 Difference]: Start difference. First operand has 271 places, 286 transitions, 2375 flow. Second operand 81 states and 4528 transitions. [2021-12-21 15:20:45,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 445 transitions, 4361 flow [2021-12-21 15:20:45,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 445 transitions, 4098 flow, removed 74 selfloop flow, removed 19 redundant places. [2021-12-21 15:20:45,517 INFO L242 Difference]: Finished difference. Result has 337 places, 319 transitions, 3031 flow [2021-12-21 15:20:45,518 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2132, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=3031, PETRI_PLACES=337, PETRI_TRANSITIONS=319} [2021-12-21 15:20:45,518 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 258 predicate places. [2021-12-21 15:20:45,518 INFO L470 AbstractCegarLoop]: Abstraction has has 337 places, 319 transitions, 3031 flow [2021-12-21 15:20:45,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 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 15:20:45,519 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:45,519 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] [2021-12-21 15:20:45,538 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 15:20:45,728 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 15:20:45,728 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:20:45,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:45,729 INFO L85 PathProgramCache]: Analyzing trace with hash 692524227, now seen corresponding path program 5 times [2021-12-21 15:20:45,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:45,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235983249] [2021-12-21 15:20:45,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:45,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:45,972 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 15:20:45,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:45,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235983249] [2021-12-21 15:20:45,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235983249] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:20:45,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151832063] [2021-12-21 15:20:45,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 15:20:45,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:20:45,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:20:45,980 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 15:20:45,981 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 15:20:46,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:20:46,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:20:46,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 15:20:46,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:20:46,474 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 15:20:46,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:20:46,895 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 15:20:46,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151832063] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:20:46,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:20:46,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2021-12-21 15:20:46,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510124588] [2021-12-21 15:20:46,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:20:46,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-21 15:20:46,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:46,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-21 15:20:46,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-12-21 15:20:46,897 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-21 15:20:46,898 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 319 transitions, 3031 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 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 15:20:46,898 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:46,898 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-21 15:20:46,898 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:48,292 INFO L129 PetriNetUnfolder]: 406/1402 cut-off events. [2021-12-21 15:20:48,294 INFO L130 PetriNetUnfolder]: For 8752/8752 co-relation queries the response was YES. [2021-12-21 15:20:48,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6431 conditions, 1402 events. 406/1402 cut-off events. For 8752/8752 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10528 event pairs, 22 based on Foata normal form. 1/1397 useless extension candidates. Maximal degree in co-relation 6377. Up to 392 conditions per place. [2021-12-21 15:20:48,306 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 170 selfloop transitions, 249 changer transitions 6/467 dead transitions. [2021-12-21 15:20:48,306 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 467 transitions, 5413 flow [2021-12-21 15:20:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-21 15:20:48,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-21 15:20:48,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2185 transitions. [2021-12-21 15:20:48,309 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6295015845577643 [2021-12-21 15:20:48,309 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2185 transitions. [2021-12-21 15:20:48,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2185 transitions. [2021-12-21 15:20:48,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:48,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2185 transitions. [2021-12-21 15:20:48,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.02564102564103) internal successors, (2185), 39 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:20:48,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 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 15:20:48,315 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 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 15:20:48,315 INFO L186 Difference]: Start difference. First operand has 337 places, 319 transitions, 3031 flow. Second operand 39 states and 2185 transitions. [2021-12-21 15:20:48,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 467 transitions, 5413 flow [2021-12-21 15:20:48,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 467 transitions, 4816 flow, removed 97 selfloop flow, removed 56 redundant places. [2021-12-21 15:20:48,350 INFO L242 Difference]: Finished difference. Result has 326 places, 396 transitions, 4281 flow [2021-12-21 15:20:48,351 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2620, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4281, PETRI_PLACES=326, PETRI_TRANSITIONS=396} [2021-12-21 15:20:48,352 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 247 predicate places. [2021-12-21 15:20:48,352 INFO L470 AbstractCegarLoop]: Abstraction has has 326 places, 396 transitions, 4281 flow [2021-12-21 15:20:48,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 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 15:20:48,353 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:48,353 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] [2021-12-21 15:20:48,369 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 15:20:48,565 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 15:20:48,566 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:20:48,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:48,566 INFO L85 PathProgramCache]: Analyzing trace with hash -229897099, now seen corresponding path program 6 times [2021-12-21 15:20:48,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:48,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385875059] [2021-12-21 15:20:48,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:48,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:48,746 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 15:20:48,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:48,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385875059] [2021-12-21 15:20:48,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385875059] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:20:48,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553911492] [2021-12-21 15:20:48,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 15:20:48,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:20:48,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:20:48,748 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 15:20:48,763 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 15:20:48,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-21 15:20:48,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:20:48,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 15:20:48,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:20:49,337 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 15:20:49,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:20:49,818 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 15:20:49,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553911492] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:20:49,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:20:49,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-21 15:20:49,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740625679] [2021-12-21 15:20:49,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:20:49,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-21 15:20:49,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:49,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-21 15:20:49,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2021-12-21 15:20:49,821 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-21 15:20:49,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 396 transitions, 4281 flow. Second operand has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 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 15:20:49,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:49,822 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-21 15:20:49,822 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:50,950 INFO L129 PetriNetUnfolder]: 406/1417 cut-off events. [2021-12-21 15:20:50,950 INFO L130 PetriNetUnfolder]: For 10316/10316 co-relation queries the response was YES. [2021-12-21 15:20:50,956 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6866 conditions, 1417 events. 406/1417 cut-off events. For 10316/10316 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10763 event pairs, 36 based on Foata normal form. 2/1413 useless extension candidates. Maximal degree in co-relation 6802. Up to 535 conditions per place. [2021-12-21 15:20:50,962 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 151 selfloop transitions, 238 changer transitions 12/443 dead transitions. [2021-12-21 15:20:50,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 443 transitions, 5489 flow [2021-12-21 15:20:50,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-21 15:20:50,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-21 15:20:50,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1827 transitions. [2021-12-21 15:20:50,963 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6220633299284984 [2021-12-21 15:20:50,964 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1827 transitions. [2021-12-21 15:20:50,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1827 transitions. [2021-12-21 15:20:50,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:50,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1827 transitions. [2021-12-21 15:20:50,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.36363636363637) internal successors, (1827), 33 states have internal predecessors, (1827), 0 states have call successors, (0), 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 15:20:50,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 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 15:20:50,968 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 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 15:20:50,969 INFO L186 Difference]: Start difference. First operand has 326 places, 396 transitions, 4281 flow. Second operand 33 states and 1827 transitions. [2021-12-21 15:20:50,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 443 transitions, 5489 flow [2021-12-21 15:20:51,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 443 transitions, 5352 flow, removed 43 selfloop flow, removed 12 redundant places. [2021-12-21 15:20:51,019 INFO L242 Difference]: Finished difference. Result has 355 places, 405 transitions, 4946 flow [2021-12-21 15:20:51,019 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4946, PETRI_PLACES=355, PETRI_TRANSITIONS=405} [2021-12-21 15:20:51,020 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 276 predicate places. [2021-12-21 15:20:51,020 INFO L470 AbstractCegarLoop]: Abstraction has has 355 places, 405 transitions, 4946 flow [2021-12-21 15:20:51,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 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 15:20:51,020 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:51,021 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] [2021-12-21 15:20:51,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-21 15:20:51,236 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 15:20:51,236 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:20:51,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:51,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1819115727, now seen corresponding path program 7 times [2021-12-21 15:20:51,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:51,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936116942] [2021-12-21 15:20:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:51,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:51,425 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 15:20:51,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:51,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936116942] [2021-12-21 15:20:51,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936116942] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:20:51,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880675162] [2021-12-21 15:20:51,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 15:20:51,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:20:51,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:20:51,426 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 15:20:51,427 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 15:20:51,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:51,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 15:20:51,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:20:51,944 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 15:20:51,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:20:52,427 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 15:20:52,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880675162] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:20:52,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:20:52,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-21 15:20:52,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626469349] [2021-12-21 15:20:52,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:20:52,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-21 15:20:52,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:52,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-21 15:20:52,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-12-21 15:20:52,429 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-21 15:20:52,430 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 405 transitions, 4946 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 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 15:20:52,430 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:52,431 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-21 15:20:52,431 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:55,388 INFO L129 PetriNetUnfolder]: 494/1679 cut-off events. [2021-12-21 15:20:55,388 INFO L130 PetriNetUnfolder]: For 13126/13126 co-relation queries the response was YES. [2021-12-21 15:20:55,398 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8926 conditions, 1679 events. 494/1679 cut-off events. For 13126/13126 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13161 event pairs, 26 based on Foata normal form. 1/1673 useless extension candidates. Maximal degree in co-relation 8853. Up to 414 conditions per place. [2021-12-21 15:20:55,407 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 173 selfloop transitions, 385 changer transitions 6/606 dead transitions. [2021-12-21 15:20:55,408 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 606 transitions, 8475 flow [2021-12-21 15:20:55,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-21 15:20:55,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-12-21 15:20:55,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3882 transitions. [2021-12-21 15:20:55,411 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6231139646869984 [2021-12-21 15:20:55,411 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3882 transitions. [2021-12-21 15:20:55,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3882 transitions. [2021-12-21 15:20:55,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:55,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3882 transitions. [2021-12-21 15:20:55,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 55.457142857142856) internal successors, (3882), 70 states have internal predecessors, (3882), 0 states have call successors, (0), 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 15:20:55,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 89.0) internal successors, (6319), 71 states have internal predecessors, (6319), 0 states have call successors, (0), 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 15:20:55,421 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 89.0) internal successors, (6319), 71 states have internal predecessors, (6319), 0 states have call successors, (0), 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 15:20:55,421 INFO L186 Difference]: Start difference. First operand has 355 places, 405 transitions, 4946 flow. Second operand 70 states and 3882 transitions. [2021-12-21 15:20:55,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 606 transitions, 8475 flow [2021-12-21 15:20:55,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 606 transitions, 8137 flow, removed 39 selfloop flow, removed 22 redundant places. [2021-12-21 15:20:55,494 INFO L242 Difference]: Finished difference. Result has 410 places, 528 transitions, 7637 flow [2021-12-21 15:20:55,494 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=4718, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=7637, PETRI_PLACES=410, PETRI_TRANSITIONS=528} [2021-12-21 15:20:55,495 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 331 predicate places. [2021-12-21 15:20:55,495 INFO L470 AbstractCegarLoop]: Abstraction has has 410 places, 528 transitions, 7637 flow [2021-12-21 15:20:55,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 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 15:20:55,495 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:55,495 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] [2021-12-21 15:20:55,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 15:20:55,696 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 15:20:55,696 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:20:55,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:55,697 INFO L85 PathProgramCache]: Analyzing trace with hash -433616245, now seen corresponding path program 8 times [2021-12-21 15:20:55,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:55,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684579962] [2021-12-21 15:20:55,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:55,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:55,937 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 15:20:55,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:55,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684579962] [2021-12-21 15:20:55,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684579962] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:20:55,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077881297] [2021-12-21 15:20:55,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:20:55,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:20:55,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:20:55,939 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 15:20:55,940 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 15:20:55,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:20:55,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:20:55,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 15:20:55,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:20:56,492 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 15:20:56,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:20:56,979 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 15:20:56,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077881297] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:20:56,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:20:56,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-21 15:20:56,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968991473] [2021-12-21 15:20:56,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:20:56,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-21 15:20:56,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:56,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-21 15:20:56,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-12-21 15:20:56,982 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-21 15:20:56,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 528 transitions, 7637 flow. Second operand has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 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 15:20:56,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:56,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-21 15:20:56,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:21:01,248 INFO L129 PetriNetUnfolder]: 590/2044 cut-off events. [2021-12-21 15:21:01,248 INFO L130 PetriNetUnfolder]: For 21449/21449 co-relation queries the response was YES. [2021-12-21 15:21:01,260 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11819 conditions, 2044 events. 590/2044 cut-off events. For 21449/21449 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17350 event pairs, 22 based on Foata normal form. 2/2036 useless extension candidates. Maximal degree in co-relation 11738. Up to 409 conditions per place. [2021-12-21 15:21:01,270 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 190 selfloop transitions, 484 changer transitions 12/728 dead transitions. [2021-12-21 15:21:01,270 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 728 transitions, 11426 flow [2021-12-21 15:21:01,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-21 15:21:01,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-12-21 15:21:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 5044 transitions. [2021-12-21 15:21:01,274 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.622792937399679 [2021-12-21 15:21:01,274 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 5044 transitions. [2021-12-21 15:21:01,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 5044 transitions. [2021-12-21 15:21:01,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:21:01,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 5044 transitions. [2021-12-21 15:21:01,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 55.42857142857143) internal successors, (5044), 91 states have internal predecessors, (5044), 0 states have call successors, (0), 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 15:21:01,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 89.0) internal successors, (8188), 92 states have internal predecessors, (8188), 0 states have call successors, (0), 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 15:21:01,287 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 89.0) internal successors, (8188), 92 states have internal predecessors, (8188), 0 states have call successors, (0), 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 15:21:01,287 INFO L186 Difference]: Start difference. First operand has 410 places, 528 transitions, 7637 flow. Second operand 91 states and 5044 transitions. [2021-12-21 15:21:01,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 728 transitions, 11426 flow [2021-12-21 15:21:01,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 728 transitions, 10858 flow, removed 182 selfloop flow, removed 26 redundant places. [2021-12-21 15:21:01,449 INFO L242 Difference]: Finished difference. Result has 487 places, 626 transitions, 9983 flow [2021-12-21 15:21:01,450 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=7151, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=9983, PETRI_PLACES=487, PETRI_TRANSITIONS=626} [2021-12-21 15:21:01,450 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 408 predicate places. [2021-12-21 15:21:01,450 INFO L470 AbstractCegarLoop]: Abstraction has has 487 places, 626 transitions, 9983 flow [2021-12-21 15:21:01,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 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 15:21:01,451 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:21:01,451 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] [2021-12-21 15:21:01,473 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 15:21:01,676 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 15:21:01,676 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:21:01,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:21:01,676 INFO L85 PathProgramCache]: Analyzing trace with hash -466440371, now seen corresponding path program 9 times [2021-12-21 15:21:01,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:21:01,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474200476] [2021-12-21 15:21:01,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:21:01,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:21:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:21:01,892 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 15:21:01,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:21:01,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474200476] [2021-12-21 15:21:01,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474200476] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:21:01,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617658790] [2021-12-21 15:21:01,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 15:21:01,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:21:01,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:21:01,897 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 15:21:01,899 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 15:21:01,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-21 15:21:01,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:21:01,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 15:21:01,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:21:02,413 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 15:21:02,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:21:02,935 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 15:21:02,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617658790] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:21:02,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:21:02,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-21 15:21:02,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852730345] [2021-12-21 15:21:02,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:21:02,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-21 15:21:02,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:21:02,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-21 15:21:02,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-12-21 15:21:02,940 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-21 15:21:02,941 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 626 transitions, 9983 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 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 15:21:02,941 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:21:02,941 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-21 15:21:02,941 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:21:05,518 INFO L129 PetriNetUnfolder]: 638/2144 cut-off events. [2021-12-21 15:21:05,518 INFO L130 PetriNetUnfolder]: For 30839/30841 co-relation queries the response was YES. [2021-12-21 15:21:05,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13566 conditions, 2144 events. 638/2144 cut-off events. For 30839/30841 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18076 event pairs, 34 based on Foata normal form. 2/2136 useless extension candidates. Maximal degree in co-relation 13472. Up to 427 conditions per place. [2021-12-21 15:21:05,540 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 254 selfloop transitions, 451 changer transitions 12/759 dead transitions. [2021-12-21 15:21:05,540 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 759 transitions, 12990 flow [2021-12-21 15:21:05,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-21 15:21:05,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-12-21 15:21:05,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3584 transitions. [2021-12-21 15:21:05,544 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6292134831460674 [2021-12-21 15:21:05,544 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3584 transitions. [2021-12-21 15:21:05,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3584 transitions. [2021-12-21 15:21:05,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:21:05,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3584 transitions. [2021-12-21 15:21:05,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 56.0) internal successors, (3584), 64 states have internal predecessors, (3584), 0 states have call successors, (0), 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 15:21:05,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 89.0) internal successors, (5785), 65 states have internal predecessors, (5785), 0 states have call successors, (0), 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 15:21:05,553 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 89.0) internal successors, (5785), 65 states have internal predecessors, (5785), 0 states have call successors, (0), 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 15:21:05,553 INFO L186 Difference]: Start difference. First operand has 487 places, 626 transitions, 9983 flow. Second operand 64 states and 3584 transitions. [2021-12-21 15:21:05,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 759 transitions, 12990 flow [2021-12-21 15:21:05,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 759 transitions, 11785 flow, removed 313 selfloop flow, removed 60 redundant places. [2021-12-21 15:21:05,739 INFO L242 Difference]: Finished difference. Result has 491 places, 671 transitions, 10859 flow [2021-12-21 15:21:05,740 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=8973, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=10859, PETRI_PLACES=491, PETRI_TRANSITIONS=671} [2021-12-21 15:21:05,740 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 412 predicate places. [2021-12-21 15:21:05,740 INFO L470 AbstractCegarLoop]: Abstraction has has 491 places, 671 transitions, 10859 flow [2021-12-21 15:21:05,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 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 15:21:05,741 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:21:05,741 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] [2021-12-21 15:21:05,758 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 15:21:05,953 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 15:21:05,953 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:21:05,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:21:05,954 INFO L85 PathProgramCache]: Analyzing trace with hash 315383393, now seen corresponding path program 10 times [2021-12-21 15:21:05,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:21:05,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241471326] [2021-12-21 15:21:05,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:21:05,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:21:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:21:06,153 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 15:21:06,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:21:06,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241471326] [2021-12-21 15:21:06,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241471326] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:21:06,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649587356] [2021-12-21 15:21:06,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 15:21:06,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:21:06,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:21:06,155 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 15:21:06,156 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 15:21:06,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 15:21:06,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:21:06,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 15:21:06,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:21:06,734 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 15:21:06,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:21:07,208 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 15:21:07,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649587356] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:21:07,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:21:07,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-21 15:21:07,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125899430] [2021-12-21 15:21:07,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:21:07,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-21 15:21:07,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:21:07,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-21 15:21:07,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 15:21:07,210 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-21 15:21:07,211 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 671 transitions, 10859 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 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 15:21:07,211 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:21:07,211 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-21 15:21:07,211 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:21:08,407 INFO L129 PetriNetUnfolder]: 636/2124 cut-off events. [2021-12-21 15:21:08,408 INFO L130 PetriNetUnfolder]: For 26755/26760 co-relation queries the response was YES. [2021-12-21 15:21:08,419 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13414 conditions, 2124 events. 636/2124 cut-off events. For 26755/26760 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17820 event pairs, 65 based on Foata normal form. 5/2113 useless extension candidates. Maximal degree in co-relation 13323. Up to 864 conditions per place. [2021-12-21 15:21:08,429 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 304 selfloop transitions, 350 changer transitions 6/702 dead transitions. [2021-12-21 15:21:08,430 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 702 transitions, 12545 flow [2021-12-21 15:21:08,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 15:21:08,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-21 15:21:08,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1503 transitions. [2021-12-21 15:21:08,431 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6254681647940075 [2021-12-21 15:21:08,431 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1503 transitions. [2021-12-21 15:21:08,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1503 transitions. [2021-12-21 15:21:08,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:21:08,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1503 transitions. [2021-12-21 15:21:08,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.666666666666664) internal successors, (1503), 27 states have internal predecessors, (1503), 0 states have call successors, (0), 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 15:21:08,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 89.0) internal successors, (2492), 28 states have internal predecessors, (2492), 0 states have call successors, (0), 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 15:21:08,435 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 89.0) internal successors, (2492), 28 states have internal predecessors, (2492), 0 states have call successors, (0), 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 15:21:08,435 INFO L186 Difference]: Start difference. First operand has 491 places, 671 transitions, 10859 flow. Second operand 27 states and 1503 transitions. [2021-12-21 15:21:08,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 702 transitions, 12545 flow [2021-12-21 15:21:08,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 702 transitions, 12136 flow, removed 92 selfloop flow, removed 43 redundant places. [2021-12-21 15:21:08,621 INFO L242 Difference]: Finished difference. Result has 471 places, 677 transitions, 11585 flow [2021-12-21 15:21:08,622 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=10459, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11585, PETRI_PLACES=471, PETRI_TRANSITIONS=677} [2021-12-21 15:21:08,623 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 392 predicate places. [2021-12-21 15:21:08,623 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 677 transitions, 11585 flow [2021-12-21 15:21:08,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 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 15:21:08,624 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:21:08,624 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] [2021-12-21 15:21:08,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 15:21:08,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 15:21:08,845 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:21:08,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:21:08,846 INFO L85 PathProgramCache]: Analyzing trace with hash -998248241, now seen corresponding path program 11 times [2021-12-21 15:21:08,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:21:08,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540044666] [2021-12-21 15:21:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:21:08,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:21:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:21:09,029 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 15:21:09,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:21:09,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540044666] [2021-12-21 15:21:09,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540044666] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:21:09,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561376228] [2021-12-21 15:21:09,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 15:21:09,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:21:09,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:21:09,031 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:21:09,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 15:21:09,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:21:09,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:21:09,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 15:21:09,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:21:09,596 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 15:21:09,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:21:10,078 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 15:21:10,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561376228] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:21:10,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:21:10,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-21 15:21:10,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398938536] [2021-12-21 15:21:10,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:21:10,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-21 15:21:10,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:21:10,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-21 15:21:10,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 15:21:10,080 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-21 15:21:10,081 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 677 transitions, 11585 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 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 15:21:10,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:21:10,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-21 15:21:10,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:21:11,637 INFO L129 PetriNetUnfolder]: 642/2363 cut-off events. [2021-12-21 15:21:11,637 INFO L130 PetriNetUnfolder]: For 32188/32193 co-relation queries the response was YES. [2021-12-21 15:21:11,653 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14630 conditions, 2363 events. 642/2363 cut-off events. For 32188/32193 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21032 event pairs, 57 based on Foata normal form. 5/2362 useless extension candidates. Maximal degree in co-relation 14540. Up to 860 conditions per place. [2021-12-21 15:21:11,677 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 287 selfloop transitions, 387 changer transitions 6/722 dead transitions. [2021-12-21 15:21:11,677 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 722 transitions, 13476 flow [2021-12-21 15:21:11,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-21 15:21:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-21 15:21:11,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1783 transitions. [2021-12-21 15:21:11,680 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6260533707865169 [2021-12-21 15:21:11,680 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1783 transitions. [2021-12-21 15:21:11,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1783 transitions. [2021-12-21 15:21:11,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:21:11,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1783 transitions. [2021-12-21 15:21:11,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.71875) internal successors, (1783), 32 states have internal predecessors, (1783), 0 states have call successors, (0), 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 15:21:11,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 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 15:21:11,684 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 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 15:21:11,685 INFO L186 Difference]: Start difference. First operand has 471 places, 677 transitions, 11585 flow. Second operand 32 states and 1783 transitions. [2021-12-21 15:21:11,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 722 transitions, 13476 flow [2021-12-21 15:21:11,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 722 transitions, 13180 flow, removed 6 selfloop flow, removed 18 redundant places. [2021-12-21 15:21:11,873 INFO L242 Difference]: Finished difference. Result has 489 places, 689 transitions, 12706 flow [2021-12-21 15:21:11,874 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=11297, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=12706, PETRI_PLACES=489, PETRI_TRANSITIONS=689} [2021-12-21 15:21:11,874 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 410 predicate places. [2021-12-21 15:21:11,874 INFO L470 AbstractCegarLoop]: Abstraction has has 489 places, 689 transitions, 12706 flow [2021-12-21 15:21:11,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 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 15:21:11,875 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:21:11,875 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] [2021-12-21 15:21:11,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-21 15:21:12,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 15:21:12,076 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:21:12,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:21:12,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1655604447, now seen corresponding path program 12 times [2021-12-21 15:21:12,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:21:12,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280879533] [2021-12-21 15:21:12,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:21:12,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:21:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:21:12,277 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 15:21:12,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:21:12,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280879533] [2021-12-21 15:21:12,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280879533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:21:12,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651343954] [2021-12-21 15:21:12,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 15:21:12,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:21:12,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:21:12,279 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:21:12,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 15:21:12,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-21 15:21:12,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:21:12,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 15:21:12,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:21:12,869 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 15:21:12,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:21:13,353 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 15:21:13,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651343954] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:21:13,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:21:13,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-21 15:21:13,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951606515] [2021-12-21 15:21:13,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:21:13,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-21 15:21:13,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:21:13,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-21 15:21:13,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 15:21:13,355 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-21 15:21:13,356 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 689 transitions, 12706 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 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 15:21:13,356 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:21:13,356 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-21 15:21:13,356 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:21:15,484 INFO L129 PetriNetUnfolder]: 708/2630 cut-off events. [2021-12-21 15:21:15,484 INFO L130 PetriNetUnfolder]: For 41222/41227 co-relation queries the response was YES. [2021-12-21 15:21:15,503 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17207 conditions, 2630 events. 708/2630 cut-off events. For 41222/41227 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 24176 event pairs, 41 based on Foata normal form. 5/2629 useless extension candidates. Maximal degree in co-relation 17112. Up to 693 conditions per place. [2021-12-21 15:21:15,513 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 315 selfloop transitions, 457 changer transitions 6/820 dead transitions. [2021-12-21 15:21:15,514 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 820 transitions, 16270 flow [2021-12-21 15:21:15,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-21 15:21:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-12-21 15:21:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2573 transitions. [2021-12-21 15:21:15,516 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6284807034684905 [2021-12-21 15:21:15,516 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2573 transitions. [2021-12-21 15:21:15,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2573 transitions. [2021-12-21 15:21:15,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:21:15,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2573 transitions. [2021-12-21 15:21:15,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 55.93478260869565) internal successors, (2573), 46 states have internal predecessors, (2573), 0 states have call successors, (0), 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 15:21:15,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 89.0) internal successors, (4183), 47 states have internal predecessors, (4183), 0 states have call successors, (0), 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 15:21:15,522 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 89.0) internal successors, (4183), 47 states have internal predecessors, (4183), 0 states have call successors, (0), 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 15:21:15,522 INFO L186 Difference]: Start difference. First operand has 489 places, 689 transitions, 12706 flow. Second operand 46 states and 2573 transitions. [2021-12-21 15:21:15,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 820 transitions, 16270 flow [2021-12-21 15:21:15,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 820 transitions, 16139 flow, removed 20 selfloop flow, removed 22 redundant places. [2021-12-21 15:21:15,781 INFO L242 Difference]: Finished difference. Result has 517 places, 742 transitions, 15025 flow [2021-12-21 15:21:15,782 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=12581, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=15025, PETRI_PLACES=517, PETRI_TRANSITIONS=742} [2021-12-21 15:21:15,782 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 438 predicate places. [2021-12-21 15:21:15,782 INFO L470 AbstractCegarLoop]: Abstraction has has 517 places, 742 transitions, 15025 flow [2021-12-21 15:21:15,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 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 15:21:15,783 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:21:15,783 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] [2021-12-21 15:21:15,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 15:21:15,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:21:15,994 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:21:15,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:21:15,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1198139793, now seen corresponding path program 13 times [2021-12-21 15:21:15,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:21:15,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427352073] [2021-12-21 15:21:15,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:21:15,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:21:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:21:16,216 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 15:21:16,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:21:16,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427352073] [2021-12-21 15:21:16,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427352073] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:21:16,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59641405] [2021-12-21 15:21:16,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 15:21:16,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:21:16,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:21:16,228 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:21:16,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 15:21:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:21:16,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 15:21:16,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:21:16,784 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 15:21:16,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:21:17,270 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 15:21:17,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59641405] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:21:17,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:21:17,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-21 15:21:17,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174903132] [2021-12-21 15:21:17,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:21:17,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-21 15:21:17,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:21:17,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-21 15:21:17,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 15:21:17,272 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-21 15:21:17,273 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 742 transitions, 15025 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 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 15:21:17,273 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:21:17,273 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-21 15:21:17,273 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:21:20,763 INFO L129 PetriNetUnfolder]: 796/2952 cut-off events. [2021-12-21 15:21:20,764 INFO L130 PetriNetUnfolder]: For 56034/56059 co-relation queries the response was YES. [2021-12-21 15:21:20,782 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20425 conditions, 2952 events. 796/2952 cut-off events. For 56034/56059 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27940 event pairs, 39 based on Foata normal form. 8/2954 useless extension candidates. Maximal degree in co-relation 20325. Up to 699 conditions per place. [2021-12-21 15:21:20,794 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 263 selfloop transitions, 615 changer transitions 6/926 dead transitions. [2021-12-21 15:21:20,794 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 926 transitions, 19721 flow [2021-12-21 15:21:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-21 15:21:20,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-12-21 15:21:20,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 3995 transitions. [2021-12-21 15:21:20,797 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6234394506866417 [2021-12-21 15:21:20,797 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 3995 transitions. [2021-12-21 15:21:20,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 3995 transitions. [2021-12-21 15:21:20,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:21:20,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 3995 transitions. [2021-12-21 15:21:20,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 55.486111111111114) internal successors, (3995), 72 states have internal predecessors, (3995), 0 states have call successors, (0), 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 15:21:20,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 89.0) internal successors, (6497), 73 states have internal predecessors, (6497), 0 states have call successors, (0), 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 15:21:20,805 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 89.0) internal successors, (6497), 73 states have internal predecessors, (6497), 0 states have call successors, (0), 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 15:21:20,806 INFO L186 Difference]: Start difference. First operand has 517 places, 742 transitions, 15025 flow. Second operand 72 states and 3995 transitions. [2021-12-21 15:21:20,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 926 transitions, 19721 flow [2021-12-21 15:21:21,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 926 transitions, 19300 flow, removed 49 selfloop flow, removed 25 redundant places. [2021-12-21 15:21:21,156 INFO L242 Difference]: Finished difference. Result has 572 places, 840 transitions, 18614 flow [2021-12-21 15:21:21,157 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=14664, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=18614, PETRI_PLACES=572, PETRI_TRANSITIONS=840} [2021-12-21 15:21:21,157 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 493 predicate places. [2021-12-21 15:21:21,158 INFO L470 AbstractCegarLoop]: Abstraction has has 572 places, 840 transitions, 18614 flow [2021-12-21 15:21:21,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 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 15:21:21,158 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:21:21,158 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] [2021-12-21 15:21:21,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 15:21:21,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-12-21 15:21:21,359 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:21:21,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:21:21,359 INFO L85 PathProgramCache]: Analyzing trace with hash -54177703, now seen corresponding path program 14 times [2021-12-21 15:21:21,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:21:21,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268421772] [2021-12-21 15:21:21,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:21:21,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:21:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:21:21,550 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 15:21:21,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:21:21,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268421772] [2021-12-21 15:21:21,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268421772] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:21:21,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591491929] [2021-12-21 15:21:21,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:21:21,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:21:21,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:21:21,552 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:21:21,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 15:21:21,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:21:21,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:21:21,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 15:21:21,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:21:22,065 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 15:21:22,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:21:22,551 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 15:21:22,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591491929] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:21:22,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:21:22,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-21 15:21:22,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754062193] [2021-12-21 15:21:22,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:21:22,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-21 15:21:22,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:21:22,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-21 15:21:22,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 15:21:22,553 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-21 15:21:22,554 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 840 transitions, 18614 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 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 15:21:22,555 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:21:22,555 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-21 15:21:22,555 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:21:24,194 INFO L129 PetriNetUnfolder]: 796/2931 cut-off events. [2021-12-21 15:21:24,195 INFO L130 PetriNetUnfolder]: For 63100/63116 co-relation queries the response was YES. [2021-12-21 15:21:24,218 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21820 conditions, 2931 events. 796/2931 cut-off events. For 63100/63116 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27601 event pairs, 100 based on Foata normal form. 3/2908 useless extension candidates. Maximal degree in co-relation 21712. Up to 1045 conditions per place. [2021-12-21 15:21:24,231 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 361 selfloop transitions, 464 changer transitions 6/873 dead transitions. [2021-12-21 15:21:24,231 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 873 transitions, 20686 flow [2021-12-21 15:21:24,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-21 15:21:24,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-21 15:21:24,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1666 transitions. [2021-12-21 15:21:24,232 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6239700374531835 [2021-12-21 15:21:24,232 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1666 transitions. [2021-12-21 15:21:24,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1666 transitions. [2021-12-21 15:21:24,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:21:24,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1666 transitions. [2021-12-21 15:21:24,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.53333333333333) internal successors, (1666), 30 states have internal predecessors, (1666), 0 states have call successors, (0), 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 15:21:24,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 89.0) internal successors, (2759), 31 states have internal predecessors, (2759), 0 states have call successors, (0), 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 15:21:24,236 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 89.0) internal successors, (2759), 31 states have internal predecessors, (2759), 0 states have call successors, (0), 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 15:21:24,236 INFO L186 Difference]: Start difference. First operand has 572 places, 840 transitions, 18614 flow. Second operand 30 states and 1666 transitions. [2021-12-21 15:21:24,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 873 transitions, 20686 flow [2021-12-21 15:21:24,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 873 transitions, 19949 flow, removed 80 selfloop flow, removed 40 redundant places. [2021-12-21 15:21:24,611 INFO L242 Difference]: Finished difference. Result has 565 places, 849 transitions, 19336 flow [2021-12-21 15:21:24,612 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=17892, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=19336, PETRI_PLACES=565, PETRI_TRANSITIONS=849} [2021-12-21 15:21:24,612 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 486 predicate places. [2021-12-21 15:21:24,612 INFO L470 AbstractCegarLoop]: Abstraction has has 565 places, 849 transitions, 19336 flow [2021-12-21 15:21:24,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 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 15:21:24,613 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:21:24,613 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] [2021-12-21 15:21:24,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-21 15:21:24,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:21:24,813 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:21:24,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:21:24,814 INFO L85 PathProgramCache]: Analyzing trace with hash 2075614249, now seen corresponding path program 15 times [2021-12-21 15:21:24,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:21:24,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318364982] [2021-12-21 15:21:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:21:24,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:21:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:21:25,008 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 15:21:25,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:21:25,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318364982] [2021-12-21 15:21:25,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318364982] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:21:25,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031308857] [2021-12-21 15:21:25,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 15:21:25,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:21:25,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:21:25,010 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:21:25,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 15:21:25,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-21 15:21:25,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:21:25,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 15:21:25,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:21:25,570 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 15:21:25,570 INFO L328 TraceCheckSpWp]: Computing backward predicates...