./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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-more-nonblocking-counter-alt2.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 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:06:54,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:06:54,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:06:54,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:06:54,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:06:54,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:06:54,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:06:54,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:06:54,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:06:54,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:06:54,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:06:54,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:06:54,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:06:54,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:06:54,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:06:54,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:06:54,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:06:54,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:06:54,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:06:54,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:06:54,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:06:54,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:06:54,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:06:54,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:06:54,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:06:54,508 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:06:54,508 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:06:54,509 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:06:54,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:06:54,511 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:06:54,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:06:54,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:06:54,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:06:54,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:06:54,515 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:06:54,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:06:54,516 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:06:54,516 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:06:54,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:06:54,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:06:54,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:06:54,519 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 03:06:54,554 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:06:54,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:06:54,555 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:06:54,556 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:06:54,557 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:06:54,557 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:06:54,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:06:54,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:06:54,558 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:06:54,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:06:54,559 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 03:06:54,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:06:54,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 03:06:54,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:06:54,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:06:54,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:06:54,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:06:54,560 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 03:06:54,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:06:54,561 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:06:54,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:06:54,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:06:54,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:06:54,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:06:54,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:06:54,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:06:54,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:06:54,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:06:54,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:06:54,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:06:54,563 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:06:54,563 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:06:54,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:06:54,564 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 [2021-12-28 03:06:54,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:06:54,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:06:54,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:06:54,890 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:06:54,891 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:06:54,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2021-12-28 03:06:54,952 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce4601a05/a7c553aa1aee42789c939b095ee29868/FLAGd3811d351 [2021-12-28 03:06:55,435 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:06:55,436 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2021-12-28 03:06:55,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce4601a05/a7c553aa1aee42789c939b095ee29868/FLAGd3811d351 [2021-12-28 03:06:55,924 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce4601a05/a7c553aa1aee42789c939b095ee29868 [2021-12-28 03:06:55,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:06:55,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:06:55,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:06:55,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:06:55,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:06:55,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:06:55" (1/1) ... [2021-12-28 03:06:55,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c67b3ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:06:55, skipping insertion in model container [2021-12-28 03:06:55,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:06:55" (1/1) ... [2021-12-28 03:06:55,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:06:55,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:06:56,086 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-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2021-12-28 03:06:56,089 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:06:56,102 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:06:56,131 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-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2021-12-28 03:06:56,138 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:06:56,151 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:06:56,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:06:56 WrapperNode [2021-12-28 03:06:56,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:06:56,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:06:56,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:06:56,153 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:06:56,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:06:56" (1/1) ... [2021-12-28 03:06:56,165 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:06:56" (1/1) ... [2021-12-28 03:06:56,185 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2021-12-28 03:06:56,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:06:56,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:06:56,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:06:56,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:06:56,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:06:56" (1/1) ... [2021-12-28 03:06:56,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:06:56" (1/1) ... [2021-12-28 03:06:56,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:06:56" (1/1) ... [2021-12-28 03:06:56,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:06:56" (1/1) ... [2021-12-28 03:06:56,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:06:56" (1/1) ... [2021-12-28 03:06:56,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:06:56" (1/1) ... [2021-12-28 03:06:56,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:06:56" (1/1) ... [2021-12-28 03:06:56,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:06:56,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:06:56,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:06:56,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:06:56,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:06:56" (1/1) ... [2021-12-28 03:06:56,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:06:56,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:06:56,261 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) [2021-12-28 03:06:56,269 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 [2021-12-28 03:06:56,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:06:56,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-28 03:06:56,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-28 03:06:56,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-28 03:06:56,299 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-28 03:06:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:06:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:06:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:06:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-28 03:06:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-28 03:06:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:06:56,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:06:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:06:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:06:56,301 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-28 03:06:56,364 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:06:56,365 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:06:56,501 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:06:56,529 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:06:56,529 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-28 03:06:56,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:06:56 BoogieIcfgContainer [2021-12-28 03:06:56,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:06:56,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:06:56,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:06:56,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:06:56,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:06:55" (1/3) ... [2021-12-28 03:06:56,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542de176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:06:56, skipping insertion in model container [2021-12-28 03:06:56,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:06:56" (2/3) ... [2021-12-28 03:06:56,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542de176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:06:56, skipping insertion in model container [2021-12-28 03:06:56,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:06:56" (3/3) ... [2021-12-28 03:06:56,538 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2021-12-28 03:06:56,542 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-28 03:06:56,542 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:06:56,543 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:06:56,543 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-28 03:06:56,593 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,593 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,594 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,599 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,600 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,601 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,601 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,601 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,602 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,602 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,603 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,606 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,606 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,607 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,607 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,607 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,608 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,608 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,608 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,608 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,609 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,612 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,612 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,613 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,614 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,614 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,614 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,615 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,615 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,619 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,620 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,620 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,620 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,621 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,622 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,622 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,622 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,622 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,625 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,630 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,630 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,630 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,631 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,632 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,632 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,632 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:06:56,635 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-28 03:06:56,694 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:06:56,704 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 [2021-12-28 03:06:56,704 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-28 03:06:56,721 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2021-12-28 03:06:56,791 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2021-12-28 03:06:56,792 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-28 03:06:56,794 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2021-12-28 03:06:56,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2021-12-28 03:06:56,803 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2021-12-28 03:06:56,838 INFO L129 PetriNetUnfolder]: 6/72 cut-off events. [2021-12-28 03:06:56,839 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-28 03:06:56,839 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:06:56,841 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] [2021-12-28 03:06:56,841 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:06:56,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:06:56,849 INFO L85 PathProgramCache]: Analyzing trace with hash 752027129, now seen corresponding path program 1 times [2021-12-28 03:06:56,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:06:56,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738478084] [2021-12-28 03:06:56,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:06:56,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:06:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:06:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:06:57,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:06:57,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738478084] [2021-12-28 03:06:57,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738478084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:06:57,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:06:57,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:06:57,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031869351] [2021-12-28 03:06:57,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:06:57,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:06:57,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:06:57,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:06:57,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:06:57,351 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 84 [2021-12-28 03:06:57,355 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 6 states, 6 states have (on average 59.833333333333336) internal successors, (359), 6 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:06:57,355 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:06:57,355 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 84 [2021-12-28 03:06:57,356 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:06:57,437 INFO L129 PetriNetUnfolder]: 34/134 cut-off events. [2021-12-28 03:06:57,437 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2021-12-28 03:06:57,438 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 134 events. 34/134 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 294 event pairs, 9 based on Foata normal form. 2/113 useless extension candidates. Maximal degree in co-relation 136. Up to 49 conditions per place. [2021-12-28 03:06:57,440 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 20 selfloop transitions, 5 changer transitions 2/74 dead transitions. [2021-12-28 03:06:57,441 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 74 transitions, 217 flow [2021-12-28 03:06:57,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:06:57,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-28 03:06:57,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 376 transitions. [2021-12-28 03:06:57,454 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.746031746031746 [2021-12-28 03:06:57,455 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 376 transitions. [2021-12-28 03:06:57,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 376 transitions. [2021-12-28 03:06:57,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:06:57,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 376 transitions. [2021-12-28 03:06:57,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 62.666666666666664) internal successors, (376), 6 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:06:57,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:06:57,471 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:06:57,473 INFO L186 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 6 states and 376 transitions. [2021-12-28 03:06:57,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 74 transitions, 217 flow [2021-12-28 03:06:57,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 74 transitions, 207 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-28 03:06:57,478 INFO L242 Difference]: Finished difference. Result has 76 places, 68 transitions, 156 flow [2021-12-28 03:06:57,480 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2021-12-28 03:06:57,484 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2021-12-28 03:06:57,484 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 156 flow [2021-12-28 03:06:57,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.833333333333336) internal successors, (359), 6 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:06:57,485 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:06:57,485 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] [2021-12-28 03:06:57,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:06:57,486 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:06:57,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:06:57,486 INFO L85 PathProgramCache]: Analyzing trace with hash -676251899, now seen corresponding path program 1 times [2021-12-28 03:06:57,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:06:57,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781393596] [2021-12-28 03:06:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:06:57,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:06:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:06:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:06:57,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:06:57,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781393596] [2021-12-28 03:06:57,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781393596] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:06:57,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:06:57,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:06:57,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175587179] [2021-12-28 03:06:57,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:06:57,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:06:57,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:06:57,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:06:57,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:06:57,615 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 84 [2021-12-28 03:06:57,615 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:06:57,615 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:06:57,616 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 84 [2021-12-28 03:06:57,616 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:06:57,744 INFO L129 PetriNetUnfolder]: 61/239 cut-off events. [2021-12-28 03:06:57,744 INFO L130 PetriNetUnfolder]: For 23/37 co-relation queries the response was YES. [2021-12-28 03:06:57,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 239 events. 61/239 cut-off events. For 23/37 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 908 event pairs, 26 based on Foata normal form. 12/236 useless extension candidates. Maximal degree in co-relation 220. Up to 75 conditions per place. [2021-12-28 03:06:57,749 INFO L132 encePairwiseOnDemand]: 78/84 looper letters, 25 selfloop transitions, 5 changer transitions 1/83 dead transitions. [2021-12-28 03:06:57,749 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 83 transitions, 266 flow [2021-12-28 03:06:57,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:06:57,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-28 03:06:57,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 349 transitions. [2021-12-28 03:06:57,753 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.830952380952381 [2021-12-28 03:06:57,754 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 349 transitions. [2021-12-28 03:06:57,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 349 transitions. [2021-12-28 03:06:57,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:06:57,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 349 transitions. [2021-12-28 03:06:57,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:06:57,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:06:57,763 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:06:57,763 INFO L186 Difference]: Start difference. First operand has 76 places, 68 transitions, 156 flow. Second operand 5 states and 349 transitions. [2021-12-28 03:06:57,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 83 transitions, 266 flow [2021-12-28 03:06:57,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 83 transitions, 256 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-28 03:06:57,767 INFO L242 Difference]: Finished difference. Result has 76 places, 70 transitions, 172 flow [2021-12-28 03:06:57,768 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2021-12-28 03:06:57,769 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2021-12-28 03:06:57,770 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 172 flow [2021-12-28 03:06:57,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:06:57,770 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:06:57,771 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] [2021-12-28 03:06:57,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 03:06:57,771 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:06:57,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:06:57,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1495906757, now seen corresponding path program 2 times [2021-12-28 03:06:57,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:06:57,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249970647] [2021-12-28 03:06:57,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:06:57,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:06:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:06:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:06:57,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:06:57,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249970647] [2021-12-28 03:06:57,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249970647] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:06:57,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837850896] [2021-12-28 03:06:57,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:06:57,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:06:57,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:06:57,920 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) [2021-12-28 03:06:57,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 03:06:58,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-28 03:06:58,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:06:58,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 03:06:58,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:06:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:06:58,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:06:58,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837850896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:06:58,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:06:58,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-28 03:06:58,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616166410] [2021-12-28 03:06:58,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:06:58,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:06:58,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:06:58,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:06:58,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:06:58,334 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 84 [2021-12-28 03:06:58,335 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 172 flow. Second operand has 6 states, 6 states have (on average 58.166666666666664) internal successors, (349), 6 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:06:58,335 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:06:58,335 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 84 [2021-12-28 03:06:58,335 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:06:58,513 INFO L129 PetriNetUnfolder]: 54/189 cut-off events. [2021-12-28 03:06:58,514 INFO L130 PetriNetUnfolder]: For 59/66 co-relation queries the response was YES. [2021-12-28 03:06:58,516 INFO L84 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 189 events. 54/189 cut-off events. For 59/66 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 594 event pairs, 24 based on Foata normal form. 13/198 useless extension candidates. Maximal degree in co-relation 250. Up to 73 conditions per place. [2021-12-28 03:06:58,518 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 24 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2021-12-28 03:06:58,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 76 transitions, 251 flow [2021-12-28 03:06:58,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:06:58,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-28 03:06:58,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 470 transitions. [2021-12-28 03:06:58,523 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6994047619047619 [2021-12-28 03:06:58,523 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 470 transitions. [2021-12-28 03:06:58,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 470 transitions. [2021-12-28 03:06:58,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:06:58,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 470 transitions. [2021-12-28 03:06:58,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.75) internal successors, (470), 8 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:06:58,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:06:58,528 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:06:58,528 INFO L186 Difference]: Start difference. First operand has 76 places, 70 transitions, 172 flow. Second operand 8 states and 470 transitions. [2021-12-28 03:06:58,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 76 transitions, 251 flow [2021-12-28 03:06:58,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 76 transitions, 241 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-28 03:06:58,538 INFO L242 Difference]: Finished difference. Result has 79 places, 69 transitions, 172 flow [2021-12-28 03:06:58,538 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=79, PETRI_TRANSITIONS=69} [2021-12-28 03:06:58,540 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2021-12-28 03:06:58,541 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 69 transitions, 172 flow [2021-12-28 03:06:58,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.166666666666664) internal successors, (349), 6 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:06:58,541 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:06:58,542 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] [2021-12-28 03:06:58,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 03:06:58,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:06:58,772 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:06:58,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:06:58,772 INFO L85 PathProgramCache]: Analyzing trace with hash 352825635, now seen corresponding path program 1 times [2021-12-28 03:06:58,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:06:58,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521604343] [2021-12-28 03:06:58,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:06:58,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:06:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:06:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:06:58,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:06:58,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521604343] [2021-12-28 03:06:58,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521604343] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:06:58,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805948186] [2021-12-28 03:06:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:06:58,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:06:58,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:06:58,971 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) [2021-12-28 03:06:58,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 03:06:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:06:59,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-28 03:06:59,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:06:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:06:59,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:06:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:06:59,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805948186] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:06:59,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:06:59,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 13 [2021-12-28 03:06:59,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507091797] [2021-12-28 03:06:59,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:06:59,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-28 03:06:59,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:06:59,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-28 03:06:59,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-12-28 03:06:59,644 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2021-12-28 03:06:59,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 69 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 56.84615384615385) internal successors, (739), 13 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:06:59,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:06:59,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2021-12-28 03:06:59,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:06:59,976 INFO L129 PetriNetUnfolder]: 138/484 cut-off events. [2021-12-28 03:06:59,977 INFO L130 PetriNetUnfolder]: For 114/121 co-relation queries the response was YES. [2021-12-28 03:06:59,978 INFO L84 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 484 events. 138/484 cut-off events. For 114/121 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2579 event pairs, 21 based on Foata normal form. 13/482 useless extension candidates. Maximal degree in co-relation 445. Up to 80 conditions per place. [2021-12-28 03:06:59,980 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 56 selfloop transitions, 23 changer transitions 18/141 dead transitions. [2021-12-28 03:06:59,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 141 transitions, 580 flow [2021-12-28 03:06:59,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 03:06:59,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-28 03:06:59,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 944 transitions. [2021-12-28 03:06:59,984 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7023809523809523 [2021-12-28 03:06:59,984 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 944 transitions. [2021-12-28 03:06:59,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 944 transitions. [2021-12-28 03:06:59,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:06:59,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 944 transitions. [2021-12-28 03:07:00,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 59.0) internal successors, (944), 16 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:00,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:00,007 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:00,007 INFO L186 Difference]: Start difference. First operand has 79 places, 69 transitions, 172 flow. Second operand 16 states and 944 transitions. [2021-12-28 03:07:00,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 141 transitions, 580 flow [2021-12-28 03:07:00,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 141 transitions, 558 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-28 03:07:00,011 INFO L242 Difference]: Finished difference. Result has 102 places, 92 transitions, 354 flow [2021-12-28 03:07:00,011 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=354, PETRI_PLACES=102, PETRI_TRANSITIONS=92} [2021-12-28 03:07:00,012 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 28 predicate places. [2021-12-28 03:07:00,012 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 92 transitions, 354 flow [2021-12-28 03:07:00,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.84615384615385) internal successors, (739), 13 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:00,013 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:07:00,013 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:07:00,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 03:07:00,231 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,SelfDestructingSolverStorable3 [2021-12-28 03:07:00,232 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:07:00,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:07:00,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1408734365, now seen corresponding path program 2 times [2021-12-28 03:07:00,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:07:00,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466194995] [2021-12-28 03:07:00,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:07:00,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:07:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:00,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:07:00,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466194995] [2021-12-28 03:07:00,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466194995] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:07:00,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117401860] [2021-12-28 03:07:00,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:07:00,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:00,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:07:00,394 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) [2021-12-28 03:07:00,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 03:07:00,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:07:00,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:07:00,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 03:07:00,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:07:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:00,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:07:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:01,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117401860] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:07:01,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:07:01,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2021-12-28 03:07:01,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038388908] [2021-12-28 03:07:01,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:07:01,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-28 03:07:01,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:07:01,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-28 03:07:01,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-12-28 03:07:01,048 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-12-28 03:07:01,050 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 92 transitions, 354 flow. Second operand has 16 states, 16 states have (on average 64.25) internal successors, (1028), 16 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:01,050 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:07:01,050 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-12-28 03:07:01,050 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:07:01,876 INFO L129 PetriNetUnfolder]: 339/894 cut-off events. [2021-12-28 03:07:01,883 INFO L130 PetriNetUnfolder]: For 1635/1638 co-relation queries the response was YES. [2021-12-28 03:07:01,889 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2808 conditions, 894 events. 339/894 cut-off events. For 1635/1638 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5089 event pairs, 9 based on Foata normal form. 18/911 useless extension candidates. Maximal degree in co-relation 2779. Up to 186 conditions per place. [2021-12-28 03:07:01,895 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 78 selfloop transitions, 104 changer transitions 10/251 dead transitions. [2021-12-28 03:07:01,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 251 transitions, 1675 flow [2021-12-28 03:07:01,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-28 03:07:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-28 03:07:01,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2124 transitions. [2021-12-28 03:07:01,901 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7901785714285714 [2021-12-28 03:07:01,901 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2124 transitions. [2021-12-28 03:07:01,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2124 transitions. [2021-12-28 03:07:01,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:07:01,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2124 transitions. [2021-12-28 03:07:01,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 66.375) internal successors, (2124), 32 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:01,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:01,913 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:01,914 INFO L186 Difference]: Start difference. First operand has 102 places, 92 transitions, 354 flow. Second operand 32 states and 2124 transitions. [2021-12-28 03:07:01,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 251 transitions, 1675 flow [2021-12-28 03:07:01,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 251 transitions, 1667 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-12-28 03:07:01,926 INFO L242 Difference]: Finished difference. Result has 146 places, 179 transitions, 1339 flow [2021-12-28 03:07:01,927 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1339, PETRI_PLACES=146, PETRI_TRANSITIONS=179} [2021-12-28 03:07:01,927 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 72 predicate places. [2021-12-28 03:07:01,928 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 179 transitions, 1339 flow [2021-12-28 03:07:01,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 64.25) internal successors, (1028), 16 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:01,928 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:07:01,929 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:07:01,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 03:07:02,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:02,149 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:07:02,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:07:02,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1501259667, now seen corresponding path program 3 times [2021-12-28 03:07:02,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:07:02,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412857675] [2021-12-28 03:07:02,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:07:02,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:07:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:02,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:02,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:07:02,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412857675] [2021-12-28 03:07:02,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412857675] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:07:02,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448925291] [2021-12-28 03:07:02,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 03:07:02,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:02,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:07:02,323 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) [2021-12-28 03:07:02,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 03:07:02,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-28 03:07:02,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:07:02,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 03:07:02,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:07:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:02,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:07:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:03,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448925291] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:07:03,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:07:03,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2021-12-28 03:07:03,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47083036] [2021-12-28 03:07:03,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:07:03,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-28 03:07:03,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:07:03,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-28 03:07:03,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-12-28 03:07:03,440 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-12-28 03:07:03,441 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 179 transitions, 1339 flow. Second operand has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:03,441 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:07:03,441 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-12-28 03:07:03,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:07:04,378 INFO L129 PetriNetUnfolder]: 429/1093 cut-off events. [2021-12-28 03:07:04,379 INFO L130 PetriNetUnfolder]: For 8495/8502 co-relation queries the response was YES. [2021-12-28 03:07:04,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5644 conditions, 1093 events. 429/1093 cut-off events. For 8495/8502 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6293 event pairs, 7 based on Foata normal form. 4/1094 useless extension candidates. Maximal degree in co-relation 5448. Up to 278 conditions per place. [2021-12-28 03:07:04,409 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 132 selfloop transitions, 199 changer transitions 4/394 dead transitions. [2021-12-28 03:07:04,409 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 394 transitions, 4442 flow [2021-12-28 03:07:04,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-28 03:07:04,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-28 03:07:04,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1973 transitions. [2021-12-28 03:07:04,415 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7829365079365079 [2021-12-28 03:07:04,415 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1973 transitions. [2021-12-28 03:07:04,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1973 transitions. [2021-12-28 03:07:04,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:07:04,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1973 transitions. [2021-12-28 03:07:04,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 65.76666666666667) internal successors, (1973), 30 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:04,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 84.0) internal successors, (2604), 31 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:04,427 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 84.0) internal successors, (2604), 31 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:04,427 INFO L186 Difference]: Start difference. First operand has 146 places, 179 transitions, 1339 flow. Second operand 30 states and 1973 transitions. [2021-12-28 03:07:04,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 394 transitions, 4442 flow [2021-12-28 03:07:04,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 394 transitions, 4170 flow, removed 129 selfloop flow, removed 2 redundant places. [2021-12-28 03:07:04,472 INFO L242 Difference]: Finished difference. Result has 190 places, 328 transitions, 3650 flow [2021-12-28 03:07:04,473 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3650, PETRI_PLACES=190, PETRI_TRANSITIONS=328} [2021-12-28 03:07:04,475 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 116 predicate places. [2021-12-28 03:07:04,476 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 328 transitions, 3650 flow [2021-12-28 03:07:04,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:04,476 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:07:04,477 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:07:04,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 03:07:04,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:04,702 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:07:04,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:07:04,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1484681127, now seen corresponding path program 4 times [2021-12-28 03:07:04,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:07:04,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815570045] [2021-12-28 03:07:04,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:07:04,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:07:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:04,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:04,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:07:04,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815570045] [2021-12-28 03:07:04,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815570045] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:07:04,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672830438] [2021-12-28 03:07:04,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 03:07:04,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:04,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:07:04,905 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) [2021-12-28 03:07:04,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 03:07:04,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 03:07:04,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:07:04,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 03:07:04,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:07:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:05,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:07:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:05,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672830438] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:07:05,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:07:05,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2021-12-28 03:07:05,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840557587] [2021-12-28 03:07:05,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:07:05,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-28 03:07:05,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:07:05,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-28 03:07:05,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-12-28 03:07:05,899 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-12-28 03:07:05,900 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 328 transitions, 3650 flow. Second operand has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:05,900 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:07:05,900 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-12-28 03:07:05,901 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:07:06,734 INFO L129 PetriNetUnfolder]: 565/1466 cut-off events. [2021-12-28 03:07:06,734 INFO L130 PetriNetUnfolder]: For 16785/16799 co-relation queries the response was YES. [2021-12-28 03:07:06,745 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8985 conditions, 1466 events. 565/1466 cut-off events. For 16785/16799 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9358 event pairs, 14 based on Foata normal form. 8/1471 useless extension candidates. Maximal degree in co-relation 8675. Up to 356 conditions per place. [2021-12-28 03:07:06,757 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 145 selfloop transitions, 272 changer transitions 6/482 dead transitions. [2021-12-28 03:07:06,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 482 transitions, 6693 flow [2021-12-28 03:07:06,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-28 03:07:06,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-28 03:07:06,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1451 transitions. [2021-12-28 03:07:06,762 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7851731601731602 [2021-12-28 03:07:06,762 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1451 transitions. [2021-12-28 03:07:06,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1451 transitions. [2021-12-28 03:07:06,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:07:06,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1451 transitions. [2021-12-28 03:07:06,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.95454545454545) internal successors, (1451), 22 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:06,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 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) [2021-12-28 03:07:06,773 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 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) [2021-12-28 03:07:06,773 INFO L186 Difference]: Start difference. First operand has 190 places, 328 transitions, 3650 flow. Second operand 22 states and 1451 transitions. [2021-12-28 03:07:06,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 482 transitions, 6693 flow [2021-12-28 03:07:06,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 482 transitions, 5998 flow, removed 232 selfloop flow, removed 11 redundant places. [2021-12-28 03:07:06,884 INFO L242 Difference]: Finished difference. Result has 209 places, 433 transitions, 5722 flow [2021-12-28 03:07:06,885 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=3218, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5722, PETRI_PLACES=209, PETRI_TRANSITIONS=433} [2021-12-28 03:07:06,886 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 135 predicate places. [2021-12-28 03:07:06,886 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 433 transitions, 5722 flow [2021-12-28 03:07:06,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:06,888 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:07:06,888 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:07:06,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 03:07:07,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:07,111 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:07:07,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:07:07,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1139541701, now seen corresponding path program 5 times [2021-12-28 03:07:07,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:07:07,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615222405] [2021-12-28 03:07:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:07:07,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:07:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:07,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:07:07,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615222405] [2021-12-28 03:07:07,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615222405] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:07:07,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96813703] [2021-12-28 03:07:07,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-28 03:07:07,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:07,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:07:07,360 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) [2021-12-28 03:07:07,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 03:07:07,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:07:07,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:07:07,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-28 03:07:07,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:07:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:07,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:07:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:08,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96813703] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:07:08,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:07:08,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 22 [2021-12-28 03:07:08,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526924765] [2021-12-28 03:07:08,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:07:08,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-28 03:07:08,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:07:08,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-28 03:07:08,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-12-28 03:07:08,210 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-12-28 03:07:08,211 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 433 transitions, 5722 flow. Second operand has 22 states, 22 states have (on average 64.13636363636364) internal successors, (1411), 22 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:08,211 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:07:08,212 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-12-28 03:07:08,212 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:07:12,988 INFO L129 PetriNetUnfolder]: 744/2072 cut-off events. [2021-12-28 03:07:12,988 INFO L130 PetriNetUnfolder]: For 22908/22916 co-relation queries the response was YES. [2021-12-28 03:07:13,011 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11960 conditions, 2072 events. 744/2072 cut-off events. For 22908/22916 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15157 event pairs, 13 based on Foata normal form. 26/2087 useless extension candidates. Maximal degree in co-relation 11614. Up to 464 conditions per place. [2021-12-28 03:07:13,029 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 125 selfloop transitions, 575 changer transitions 4/763 dead transitions. [2021-12-28 03:07:13,030 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 763 transitions, 12180 flow [2021-12-28 03:07:13,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-28 03:07:13,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-12-28 03:07:13,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 5211 transitions. [2021-12-28 03:07:13,038 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7754464285714285 [2021-12-28 03:07:13,038 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 5211 transitions. [2021-12-28 03:07:13,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 5211 transitions. [2021-12-28 03:07:13,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:07:13,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 5211 transitions. [2021-12-28 03:07:13,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 65.1375) internal successors, (5211), 80 states have internal predecessors, (5211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:13,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 84.0) internal successors, (6804), 81 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:13,078 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 84.0) internal successors, (6804), 81 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:13,078 INFO L186 Difference]: Start difference. First operand has 209 places, 433 transitions, 5722 flow. Second operand 80 states and 5211 transitions. [2021-12-28 03:07:13,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 763 transitions, 12180 flow [2021-12-28 03:07:13,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 763 transitions, 11762 flow, removed 201 selfloop flow, removed 3 redundant places. [2021-12-28 03:07:13,231 INFO L242 Difference]: Finished difference. Result has 295 places, 683 transitions, 10861 flow [2021-12-28 03:07:13,232 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=5548, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=10861, PETRI_PLACES=295, PETRI_TRANSITIONS=683} [2021-12-28 03:07:13,233 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 221 predicate places. [2021-12-28 03:07:13,233 INFO L470 AbstractCegarLoop]: Abstraction has has 295 places, 683 transitions, 10861 flow [2021-12-28 03:07:13,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 64.13636363636364) internal successors, (1411), 22 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:13,234 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:07:13,234 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:07:13,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 03:07:13,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:13,447 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:07:13,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:07:13,448 INFO L85 PathProgramCache]: Analyzing trace with hash 115301975, now seen corresponding path program 6 times [2021-12-28 03:07:13,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:07:13,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979653107] [2021-12-28 03:07:13,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:07:13,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:07:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:13,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:07:13,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979653107] [2021-12-28 03:07:13,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979653107] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:07:13,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417101971] [2021-12-28 03:07:13,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-28 03:07:13,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:13,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:07:13,597 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) [2021-12-28 03:07:13,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 03:07:13,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-28 03:07:13,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:07:13,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 03:07:13,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:07:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:13,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:07:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:14,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417101971] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:07:14,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:07:14,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2021-12-28 03:07:14,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144536239] [2021-12-28 03:07:14,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:07:14,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-28 03:07:14,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:07:14,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-28 03:07:14,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-12-28 03:07:14,621 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-12-28 03:07:14,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 683 transitions, 10861 flow. Second operand has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:14,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:07:14,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-12-28 03:07:14,622 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:07:16,270 INFO L129 PetriNetUnfolder]: 893/2411 cut-off events. [2021-12-28 03:07:16,271 INFO L130 PetriNetUnfolder]: For 28464/28474 co-relation queries the response was YES. [2021-12-28 03:07:16,291 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15655 conditions, 2411 events. 893/2411 cut-off events. For 28464/28474 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 18368 event pairs, 18 based on Foata normal form. 11/2409 useless extension candidates. Maximal degree in co-relation 15504. Up to 573 conditions per place. [2021-12-28 03:07:16,314 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 258 selfloop transitions, 535 changer transitions 3/855 dead transitions. [2021-12-28 03:07:16,314 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 855 transitions, 15612 flow [2021-12-28 03:07:16,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-28 03:07:16,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-28 03:07:16,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2315 transitions. [2021-12-28 03:07:16,318 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7874149659863946 [2021-12-28 03:07:16,318 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2315 transitions. [2021-12-28 03:07:16,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2315 transitions. [2021-12-28 03:07:16,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:07:16,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2315 transitions. [2021-12-28 03:07:16,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 66.14285714285714) internal successors, (2315), 35 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:16,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:16,327 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:16,327 INFO L186 Difference]: Start difference. First operand has 295 places, 683 transitions, 10861 flow. Second operand 35 states and 2315 transitions. [2021-12-28 03:07:16,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 855 transitions, 15612 flow [2021-12-28 03:07:16,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 855 transitions, 13786 flow, removed 797 selfloop flow, removed 13 redundant places. [2021-12-28 03:07:16,540 INFO L242 Difference]: Finished difference. Result has 324 places, 791 transitions, 13091 flow [2021-12-28 03:07:16,540 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=9443, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=416, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=13091, PETRI_PLACES=324, PETRI_TRANSITIONS=791} [2021-12-28 03:07:16,541 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 250 predicate places. [2021-12-28 03:07:16,541 INFO L470 AbstractCegarLoop]: Abstraction has has 324 places, 791 transitions, 13091 flow [2021-12-28 03:07:16,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:16,542 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:07:16,542 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:07:16,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 03:07:16,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:16,747 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:07:16,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:07:16,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1392148443, now seen corresponding path program 7 times [2021-12-28 03:07:16,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:07:16,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535936454] [2021-12-28 03:07:16,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:07:16,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:07:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:16,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:07:16,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535936454] [2021-12-28 03:07:16,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535936454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:07:16,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559061522] [2021-12-28 03:07:16,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-28 03:07:16,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:16,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:07:16,989 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) [2021-12-28 03:07:16,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 03:07:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:17,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 03:07:17,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:07:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:17,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:07:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:17,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559061522] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:07:17,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:07:17,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2021-12-28 03:07:17,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088309679] [2021-12-28 03:07:17,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:07:17,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-28 03:07:17,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:07:17,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-28 03:07:17,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-12-28 03:07:17,893 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-12-28 03:07:17,894 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 791 transitions, 13091 flow. Second operand has 19 states, 19 states have (on average 64.47368421052632) internal successors, (1225), 19 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:17,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:07:17,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-12-28 03:07:17,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:07:20,210 INFO L129 PetriNetUnfolder]: 1325/3751 cut-off events. [2021-12-28 03:07:20,211 INFO L130 PetriNetUnfolder]: For 38022/38032 co-relation queries the response was YES. [2021-12-28 03:07:20,248 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24373 conditions, 3751 events. 1325/3751 cut-off events. For 38022/38032 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 32178 event pairs, 26 based on Foata normal form. 42/3772 useless extension candidates. Maximal degree in co-relation 23940. Up to 842 conditions per place. [2021-12-28 03:07:20,283 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 307 selfloop transitions, 965 changer transitions 1/1332 dead transitions. [2021-12-28 03:07:20,284 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1332 transitions, 24881 flow [2021-12-28 03:07:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-28 03:07:20,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-12-28 03:07:20,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2724 transitions. [2021-12-28 03:07:20,297 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7909407665505227 [2021-12-28 03:07:20,297 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2724 transitions. [2021-12-28 03:07:20,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2724 transitions. [2021-12-28 03:07:20,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:07:20,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2724 transitions. [2021-12-28 03:07:20,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 66.4390243902439) internal successors, (2724), 41 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:20,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:20,313 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:20,314 INFO L186 Difference]: Start difference. First operand has 324 places, 791 transitions, 13091 flow. Second operand 41 states and 2724 transitions. [2021-12-28 03:07:20,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1332 transitions, 24881 flow [2021-12-28 03:07:20,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1332 transitions, 24531 flow, removed 76 selfloop flow, removed 13 redundant places. [2021-12-28 03:07:20,700 INFO L242 Difference]: Finished difference. Result has 366 places, 1202 transitions, 24247 flow [2021-12-28 03:07:20,701 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=12841, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=589, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=24247, PETRI_PLACES=366, PETRI_TRANSITIONS=1202} [2021-12-28 03:07:20,702 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 292 predicate places. [2021-12-28 03:07:20,702 INFO L470 AbstractCegarLoop]: Abstraction has has 366 places, 1202 transitions, 24247 flow [2021-12-28 03:07:20,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.47368421052632) internal successors, (1225), 19 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:20,703 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:07:20,703 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:07:20,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 03:07:20,909 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,SelfDestructingSolverStorable9 [2021-12-28 03:07:20,910 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:07:20,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:07:20,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1798251347, now seen corresponding path program 8 times [2021-12-28 03:07:20,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:07:20,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106722085] [2021-12-28 03:07:20,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:07:20,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:07:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:21,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:07:21,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106722085] [2021-12-28 03:07:21,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106722085] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:07:21,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319406460] [2021-12-28 03:07:21,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:07:21,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:21,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:07:21,084 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) [2021-12-28 03:07:21,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 03:07:21,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:07:21,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:07:21,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 03:07:21,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:07:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:21,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:07:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:22,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319406460] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:07:22,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:07:22,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2021-12-28 03:07:22,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309515425] [2021-12-28 03:07:22,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:07:22,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-28 03:07:22,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:07:22,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-28 03:07:22,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-12-28 03:07:22,117 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-12-28 03:07:22,117 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 1202 transitions, 24247 flow. Second operand has 18 states, 18 states have (on average 64.61111111111111) internal successors, (1163), 18 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:22,118 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:07:22,118 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-12-28 03:07:22,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:07:26,852 INFO L129 PetriNetUnfolder]: 1730/5158 cut-off events. [2021-12-28 03:07:26,852 INFO L130 PetriNetUnfolder]: For 67516/67527 co-relation queries the response was YES. [2021-12-28 03:07:26,903 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36918 conditions, 5158 events. 1730/5158 cut-off events. For 67516/67527 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 48799 event pairs, 32 based on Foata normal form. 50/5185 useless extension candidates. Maximal degree in co-relation 36457. Up to 1021 conditions per place. [2021-12-28 03:07:26,950 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 290 selfloop transitions, 1430 changer transitions 1/1780 dead transitions. [2021-12-28 03:07:26,951 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 1780 transitions, 38888 flow [2021-12-28 03:07:26,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-28 03:07:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-12-28 03:07:26,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4884 transitions. [2021-12-28 03:07:26,957 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2021-12-28 03:07:26,957 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4884 transitions. [2021-12-28 03:07:26,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4884 transitions. [2021-12-28 03:07:26,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:07:26,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4884 transitions. [2021-12-28 03:07:26,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 66.0) internal successors, (4884), 74 states have internal predecessors, (4884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:26,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 84.0) internal successors, (6300), 75 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:26,976 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 84.0) internal successors, (6300), 75 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:26,976 INFO L186 Difference]: Start difference. First operand has 366 places, 1202 transitions, 24247 flow. Second operand 74 states and 4884 transitions. [2021-12-28 03:07:26,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 1780 transitions, 38888 flow [2021-12-28 03:07:27,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1780 transitions, 38263 flow, removed 281 selfloop flow, removed 6 redundant places. [2021-12-28 03:07:27,898 INFO L242 Difference]: Finished difference. Result has 456 places, 1692 transitions, 38936 flow [2021-12-28 03:07:27,899 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=23841, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=996, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=38936, PETRI_PLACES=456, PETRI_TRANSITIONS=1692} [2021-12-28 03:07:27,899 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 382 predicate places. [2021-12-28 03:07:27,900 INFO L470 AbstractCegarLoop]: Abstraction has has 456 places, 1692 transitions, 38936 flow [2021-12-28 03:07:27,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.61111111111111) internal successors, (1163), 18 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:27,900 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:07:27,901 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:07:27,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-28 03:07:28,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:28,102 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:07:28,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:07:28,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1780276453, now seen corresponding path program 9 times [2021-12-28 03:07:28,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:07:28,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659059651] [2021-12-28 03:07:28,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:07:28,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:07:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:28,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:07:28,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659059651] [2021-12-28 03:07:28,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659059651] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:07:28,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041889451] [2021-12-28 03:07:28,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 03:07:28,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:28,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:07:28,237 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) [2021-12-28 03:07:28,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 03:07:28,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-28 03:07:28,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:07:28,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 03:07:28,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:07:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:28,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:07:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:29,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041889451] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:07:29,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:07:29,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2021-12-28 03:07:29,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779919779] [2021-12-28 03:07:29,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:07:29,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-28 03:07:29,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:07:29,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-28 03:07:29,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-12-28 03:07:29,002 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-12-28 03:07:29,003 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 1692 transitions, 38936 flow. Second operand has 17 states, 17 states have (on average 64.3529411764706) internal successors, (1094), 17 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:29,004 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:07:29,004 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-12-28 03:07:29,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:07:35,656 INFO L129 PetriNetUnfolder]: 2165/6901 cut-off events. [2021-12-28 03:07:35,656 INFO L130 PetriNetUnfolder]: For 109212/109246 co-relation queries the response was YES. [2021-12-28 03:07:35,715 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53927 conditions, 6901 events. 2165/6901 cut-off events. For 109212/109246 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 71029 event pairs, 51 based on Foata normal form. 48/6919 useless extension candidates. Maximal degree in co-relation 53539. Up to 1270 conditions per place. [2021-12-28 03:07:35,767 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 341 selfloop transitions, 1813 changer transitions 6/2219 dead transitions. [2021-12-28 03:07:35,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 2219 transitions, 55344 flow [2021-12-28 03:07:35,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-28 03:07:35,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-12-28 03:07:35,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4529 transitions. [2021-12-28 03:07:35,772 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7814009661835749 [2021-12-28 03:07:35,772 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4529 transitions. [2021-12-28 03:07:35,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4529 transitions. [2021-12-28 03:07:35,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:07:35,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4529 transitions. [2021-12-28 03:07:35,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 65.6376811594203) internal successors, (4529), 69 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:35,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 84.0) internal successors, (5880), 70 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:35,787 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 84.0) internal successors, (5880), 70 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:35,788 INFO L186 Difference]: Start difference. First operand has 456 places, 1692 transitions, 38936 flow. Second operand 69 states and 4529 transitions. [2021-12-28 03:07:35,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 2219 transitions, 55344 flow [2021-12-28 03:07:37,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 2219 transitions, 54174 flow, removed 373 selfloop flow, removed 12 redundant places. [2021-12-28 03:07:37,776 INFO L242 Difference]: Finished difference. Result has 534 places, 2128 transitions, 55517 flow [2021-12-28 03:07:37,778 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=38095, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=55517, PETRI_PLACES=534, PETRI_TRANSITIONS=2128} [2021-12-28 03:07:37,778 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 460 predicate places. [2021-12-28 03:07:37,778 INFO L470 AbstractCegarLoop]: Abstraction has has 534 places, 2128 transitions, 55517 flow [2021-12-28 03:07:37,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.3529411764706) internal successors, (1094), 17 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:37,779 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:07:37,779 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:07:37,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 03:07:37,979 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,SelfDestructingSolverStorable11 [2021-12-28 03:07:37,980 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:07:37,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:07:37,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1526211693, now seen corresponding path program 10 times [2021-12-28 03:07:37,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:07:37,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161614978] [2021-12-28 03:07:37,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:07:37,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:07:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:38,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:07:38,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161614978] [2021-12-28 03:07:38,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161614978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:07:38,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551637629] [2021-12-28 03:07:38,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 03:07:38,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:38,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:07:38,095 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) [2021-12-28 03:07:38,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 03:07:38,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 03:07:38,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:07:38,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 03:07:38,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:07:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:38,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:07:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:39,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551637629] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:07:39,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:07:39,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2021-12-28 03:07:39,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265192682] [2021-12-28 03:07:39,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:07:39,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-28 03:07:39,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:07:39,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-28 03:07:39,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-12-28 03:07:39,079 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-12-28 03:07:39,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 2128 transitions, 55517 flow. Second operand has 20 states, 20 states have (on average 64.4) internal successors, (1288), 20 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:39,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:07:39,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-12-28 03:07:39,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:07:45,788 INFO L129 PetriNetUnfolder]: 2673/8808 cut-off events. [2021-12-28 03:07:45,788 INFO L130 PetriNetUnfolder]: For 160773/160807 co-relation queries the response was YES. [2021-12-28 03:07:45,880 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73863 conditions, 8808 events. 2673/8808 cut-off events. For 160773/160807 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 96294 event pairs, 49 based on Foata normal form. 47/8823 useless extension candidates. Maximal degree in co-relation 73549. Up to 1515 conditions per place. [2021-12-28 03:07:45,944 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 465 selfloop transitions, 2275 changer transitions 4/2803 dead transitions. [2021-12-28 03:07:45,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 2803 transitions, 78161 flow [2021-12-28 03:07:45,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-28 03:07:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-12-28 03:07:45,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3050 transitions. [2021-12-28 03:07:45,949 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7893374741200828 [2021-12-28 03:07:45,949 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3050 transitions. [2021-12-28 03:07:45,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3050 transitions. [2021-12-28 03:07:45,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:07:45,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3050 transitions. [2021-12-28 03:07:45,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 66.30434782608695) internal successors, (3050), 46 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:45,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:45,959 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:45,959 INFO L186 Difference]: Start difference. First operand has 534 places, 2128 transitions, 55517 flow. Second operand 46 states and 3050 transitions. [2021-12-28 03:07:45,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 2803 transitions, 78161 flow [2021-12-28 03:07:49,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 2803 transitions, 77665 flow, removed 93 selfloop flow, removed 27 redundant places. [2021-12-28 03:07:49,595 INFO L242 Difference]: Finished difference. Result has 563 places, 2696 transitions, 78965 flow [2021-12-28 03:07:49,598 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=55027, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1733, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=78965, PETRI_PLACES=563, PETRI_TRANSITIONS=2696} [2021-12-28 03:07:49,598 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 489 predicate places. [2021-12-28 03:07:49,598 INFO L470 AbstractCegarLoop]: Abstraction has has 563 places, 2696 transitions, 78965 flow [2021-12-28 03:07:49,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.4) internal successors, (1288), 20 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:49,599 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:07:49,599 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:07:49,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 03:07:49,815 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,SelfDestructingSolverStorable12 [2021-12-28 03:07:49,815 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:07:49,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:07:49,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1865017427, now seen corresponding path program 11 times [2021-12-28 03:07:49,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:07:49,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258306898] [2021-12-28 03:07:49,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:07:49,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:07:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:49,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:07:49,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258306898] [2021-12-28 03:07:49,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258306898] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:07:49,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273020554] [2021-12-28 03:07:49,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-28 03:07:49,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:49,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:07:49,941 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) [2021-12-28 03:07:49,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 03:07:49,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-28 03:07:49,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:07:49,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-28 03:07:49,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:07:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:50,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:07:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:07:50,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273020554] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:07:50,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:07:50,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2021-12-28 03:07:50,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776962426] [2021-12-28 03:07:50,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:07:50,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-28 03:07:50,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:07:50,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-28 03:07:50,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-12-28 03:07:50,636 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-12-28 03:07:50,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 2696 transitions, 78965 flow. Second operand has 20 states, 20 states have (on average 64.05) internal successors, (1281), 20 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:50,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:07:50,638 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-12-28 03:07:50,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand