./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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-mult-equiv.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 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:07:57,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:07:57,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:07:57,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:07:57,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:07:57,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:07:57,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:07:57,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:07:57,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:07:57,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:07:57,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:07:57,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:07:57,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:07:57,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:07:57,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:07:57,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:07:57,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:07:57,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:07:57,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:07:57,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:07:57,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:07:57,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:07:57,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:07:57,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:07:57,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:07:57,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:07:57,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:07:57,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:07:57,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:07:57,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:07:57,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:07:57,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:07:57,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:07:57,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:07:57,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:07:57,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:07:57,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:07:57,310 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:07:57,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:07:57,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:07:57,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:07:57,313 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 03:07:57,326 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:07:57,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:07:57,331 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:07:57,331 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:07:57,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:07:57,332 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:07:57,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:07:57,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:07:57,333 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:07:57,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:07:57,334 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 03:07:57,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:07:57,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 03:07:57,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:07:57,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:07:57,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:07:57,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:07:57,335 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 03:07:57,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:07:57,335 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:07:57,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:07:57,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:07:57,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:07:57,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:07:57,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:07:57,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:07:57,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:07:57,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:07:57,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:07:57,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:07:57,337 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:07:57,337 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:07:57,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:07:57,337 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:07:57,337 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf [2021-12-16 03:07:57,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:07:57,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:07:57,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:07:57,555 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:07:57,555 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:07:57,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2021-12-16 03:07:57,600 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/946d31753/dcee8f20c021479299d0625268b11a39/FLAG3eb1e32c2 [2021-12-16 03:07:57,933 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:07:57,934 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2021-12-16 03:07:57,942 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/946d31753/dcee8f20c021479299d0625268b11a39/FLAG3eb1e32c2 [2021-12-16 03:07:58,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/946d31753/dcee8f20c021479299d0625268b11a39 [2021-12-16 03:07:58,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:07:58,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:07:58,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:07:58,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:07:58,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:07:58,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:07:58" (1/1) ... [2021-12-16 03:07:58,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10dfbd00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:58, skipping insertion in model container [2021-12-16 03:07:58,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:07:58" (1/1) ... [2021-12-16 03:07:58,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:07:58,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:07:58,587 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-mult-equiv.wvr.c[2591,2604] [2021-12-16 03:07:58,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:07:58,600 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:07:58,635 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-mult-equiv.wvr.c[2591,2604] [2021-12-16 03:07:58,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:07:58,649 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:07:58,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:58 WrapperNode [2021-12-16 03:07:58,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:07:58,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:07:58,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:07:58,651 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:07:58,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:58" (1/1) ... [2021-12-16 03:07:58,666 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:58" (1/1) ... [2021-12-16 03:07:58,684 INFO L137 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2021-12-16 03:07:58,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:07:58,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:07:58,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:07:58,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:07:58,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:58" (1/1) ... [2021-12-16 03:07:58,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:58" (1/1) ... [2021-12-16 03:07:58,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:58" (1/1) ... [2021-12-16 03:07:58,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:58" (1/1) ... [2021-12-16 03:07:58,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:58" (1/1) ... [2021-12-16 03:07:58,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:58" (1/1) ... [2021-12-16 03:07:58,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:58" (1/1) ... [2021-12-16 03:07:58,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:07:58,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:07:58,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:07:58,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:07:58,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:58" (1/1) ... [2021-12-16 03:07:58,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:07:58,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:07:58,750 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) [2021-12-16 03:07:58,768 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 [2021-12-16 03:07:58,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:07:58,785 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-16 03:07:58,785 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-16 03:07:58,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-16 03:07:58,786 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-16 03:07:58,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-16 03:07:58,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-16 03:07:58,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:07:58,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:07:58,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:07:58,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-16 03:07:58,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-16 03:07:58,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:07:58,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:07:58,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:07:58,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:07:58,789 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-16 03:07:58,858 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:07:58,859 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:07:59,076 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:07:59,129 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:07:59,130 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-16 03:07:59,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:07:59 BoogieIcfgContainer [2021-12-16 03:07:59,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:07:59,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:07:59,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:07:59,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:07:59,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:07:58" (1/3) ... [2021-12-16 03:07:59,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af05ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:07:59, skipping insertion in model container [2021-12-16 03:07:59,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:58" (2/3) ... [2021-12-16 03:07:59,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af05ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:07:59, skipping insertion in model container [2021-12-16 03:07:59,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:07:59" (3/3) ... [2021-12-16 03:07:59,140 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2021-12-16 03:07:59,144 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-16 03:07:59,145 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:07:59,145 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:07:59,145 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-16 03:07:59,178 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,179 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,183 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,183 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,183 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,183 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,183 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,183 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,184 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,184 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,184 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,184 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,184 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,184 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,184 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,185 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,185 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,185 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,185 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,186 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,186 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,186 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,186 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,186 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,186 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,191 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,192 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,192 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,193 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,193 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,193 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,193 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,193 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,194 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,197 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,198 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,198 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,198 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,200 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,200 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,200 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,202 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,203 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,203 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:59,210 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-16 03:07:59,250 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:07:59,256 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 [2021-12-16 03:07:59,256 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-16 03:07:59,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 97 transitions, 218 flow [2021-12-16 03:07:59,315 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2021-12-16 03:07:59,319 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-16 03:07:59,322 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 7/94 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2021-12-16 03:07:59,323 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 97 transitions, 218 flow [2021-12-16 03:07:59,326 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 83 transitions, 184 flow [2021-12-16 03:07:59,340 INFO L129 PetriNetUnfolder]: 7/82 cut-off events. [2021-12-16 03:07:59,341 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-16 03:07:59,341 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:07:59,341 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:07:59,342 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:07:59,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:07:59,345 INFO L85 PathProgramCache]: Analyzing trace with hash 64157928, now seen corresponding path program 1 times [2021-12-16 03:07:59,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:07:59,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035462186] [2021-12-16 03:07:59,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:07:59,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:07:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:07:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:59,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:07:59,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035462186] [2021-12-16 03:07:59,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035462186] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:07:59,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:07:59,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 03:07:59,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960825152] [2021-12-16 03:07:59,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:07:59,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 03:07:59,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:07:59,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 03:07:59,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 03:07:59,576 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 97 [2021-12-16 03:07:59,581 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 184 flow. Second operand has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:59,581 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:07:59,581 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 97 [2021-12-16 03:07:59,582 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:07:59,630 INFO L129 PetriNetUnfolder]: 26/138 cut-off events. [2021-12-16 03:07:59,630 INFO L130 PetriNetUnfolder]: For 28/29 co-relation queries the response was YES. [2021-12-16 03:07:59,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 138 events. 26/138 cut-off events. For 28/29 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 246 event pairs, 7 based on Foata normal form. 25/148 useless extension candidates. Maximal degree in co-relation 127. Up to 39 conditions per place. [2021-12-16 03:07:59,632 INFO L132 encePairwiseOnDemand]: 93/97 looper letters, 9 selfloop transitions, 0 changer transitions 1/79 dead transitions. [2021-12-16 03:07:59,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 194 flow [2021-12-16 03:07:59,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 03:07:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-16 03:07:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 179 transitions. [2021-12-16 03:07:59,645 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9226804123711341 [2021-12-16 03:07:59,646 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 179 transitions. [2021-12-16 03:07:59,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 179 transitions. [2021-12-16 03:07:59,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:07:59,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 179 transitions. [2021-12-16 03:07:59,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:59,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:59,658 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:59,660 INFO L186 Difference]: Start difference. First operand has 86 places, 83 transitions, 184 flow. Second operand 2 states and 179 transitions. [2021-12-16 03:07:59,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 194 flow [2021-12-16 03:07:59,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 182 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-16 03:07:59,667 INFO L242 Difference]: Finished difference. Result has 81 places, 78 transitions, 162 flow [2021-12-16 03:07:59,668 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=162, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2021-12-16 03:07:59,671 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2021-12-16 03:07:59,671 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 162 flow [2021-12-16 03:07:59,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:59,672 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:07:59,672 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:07:59,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:07:59,672 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:07:59,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:07:59,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1292779301, now seen corresponding path program 1 times [2021-12-16 03:07:59,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:07:59,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509135445] [2021-12-16 03:07:59,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:07:59,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:07:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:07:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:59,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:07:59,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509135445] [2021-12-16 03:07:59,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509135445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:07:59,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:07:59,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:07:59,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144818455] [2021-12-16 03:07:59,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:07:59,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:07:59,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:07:59,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:07:59,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:07:59,847 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 97 [2021-12-16 03:07:59,847 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:59,847 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:07:59,847 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 97 [2021-12-16 03:07:59,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:07:59,924 INFO L129 PetriNetUnfolder]: 34/192 cut-off events. [2021-12-16 03:07:59,926 INFO L130 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2021-12-16 03:07:59,927 INFO L84 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 192 events. 34/192 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 479 event pairs, 1 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 266. Up to 44 conditions per place. [2021-12-16 03:07:59,929 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 25 selfloop transitions, 7 changer transitions 4/99 dead transitions. [2021-12-16 03:07:59,929 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 284 flow [2021-12-16 03:07:59,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:07:59,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:07:59,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2021-12-16 03:07:59,934 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2021-12-16 03:07:59,936 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2021-12-16 03:07:59,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2021-12-16 03:07:59,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:07:59,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2021-12-16 03:07:59,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:59,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:59,941 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:59,942 INFO L186 Difference]: Start difference. First operand has 81 places, 78 transitions, 162 flow. Second operand 6 states and 493 transitions. [2021-12-16 03:07:59,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 284 flow [2021-12-16 03:07:59,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-16 03:07:59,944 INFO L242 Difference]: Finished difference. Result has 88 places, 83 transitions, 202 flow [2021-12-16 03:07:59,944 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2021-12-16 03:07:59,945 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2021-12-16 03:07:59,945 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 202 flow [2021-12-16 03:07:59,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:59,945 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:07:59,945 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:07:59,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 03:07:59,946 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:07:59,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:07:59,946 INFO L85 PathProgramCache]: Analyzing trace with hash -187386445, now seen corresponding path program 1 times [2021-12-16 03:07:59,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:07:59,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971626889] [2021-12-16 03:07:59,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:07:59,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:07:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:00,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:00,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971626889] [2021-12-16 03:08:00,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971626889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:00,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:00,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:08:00,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694316938] [2021-12-16 03:08:00,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:00,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:08:00,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:00,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:08:00,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:08:00,155 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-16 03:08:00,155 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:00,155 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:00,155 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-16 03:08:00,155 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:00,455 INFO L129 PetriNetUnfolder]: 297/760 cut-off events. [2021-12-16 03:08:00,455 INFO L130 PetriNetUnfolder]: For 129/134 co-relation queries the response was YES. [2021-12-16 03:08:00,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 760 events. 297/760 cut-off events. For 129/134 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4079 event pairs, 54 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 1452. Up to 254 conditions per place. [2021-12-16 03:08:00,463 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 53 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2021-12-16 03:08:00,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 486 flow [2021-12-16 03:08:00,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:08:00,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-16 03:08:00,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 636 transitions. [2021-12-16 03:08:00,466 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8195876288659794 [2021-12-16 03:08:00,466 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 636 transitions. [2021-12-16 03:08:00,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 636 transitions. [2021-12-16 03:08:00,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:00,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 636 transitions. [2021-12-16 03:08:00,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.5) internal successors, (636), 8 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:00,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:00,470 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:00,470 INFO L186 Difference]: Start difference. First operand has 88 places, 83 transitions, 202 flow. Second operand 8 states and 636 transitions. [2021-12-16 03:08:00,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 486 flow [2021-12-16 03:08:00,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 482 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-12-16 03:08:00,480 INFO L242 Difference]: Finished difference. Result has 96 places, 98 transitions, 330 flow [2021-12-16 03:08:00,480 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=330, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2021-12-16 03:08:00,482 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 10 predicate places. [2021-12-16 03:08:00,482 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 330 flow [2021-12-16 03:08:00,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:00,482 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:00,483 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:00,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 03:08:00,483 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:08:00,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:00,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1540254679, now seen corresponding path program 2 times [2021-12-16 03:08:00,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:00,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353536716] [2021-12-16 03:08:00,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:00,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:00,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:00,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353536716] [2021-12-16 03:08:00,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353536716] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:00,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:00,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:08:00,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762711736] [2021-12-16 03:08:00,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:00,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:08:00,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:00,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:08:00,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:08:00,642 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-16 03:08:00,643 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:00,643 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:00,643 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-16 03:08:00,643 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:00,797 INFO L129 PetriNetUnfolder]: 371/880 cut-off events. [2021-12-16 03:08:00,798 INFO L130 PetriNetUnfolder]: For 438/442 co-relation queries the response was YES. [2021-12-16 03:08:00,801 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2092 conditions, 880 events. 371/880 cut-off events. For 438/442 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4695 event pairs, 69 based on Foata normal form. 18/834 useless extension candidates. Maximal degree in co-relation 2081. Up to 308 conditions per place. [2021-12-16 03:08:00,805 INFO L132 encePairwiseOnDemand]: 90/97 looper letters, 61 selfloop transitions, 22 changer transitions 2/142 dead transitions. [2021-12-16 03:08:00,805 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 142 transitions, 689 flow [2021-12-16 03:08:00,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:08:00,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:08:00,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 490 transitions. [2021-12-16 03:08:00,807 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8419243986254296 [2021-12-16 03:08:00,807 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 490 transitions. [2021-12-16 03:08:00,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 490 transitions. [2021-12-16 03:08:00,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:00,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 490 transitions. [2021-12-16 03:08:00,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.66666666666667) internal successors, (490), 6 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:00,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:00,810 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:00,811 INFO L186 Difference]: Start difference. First operand has 96 places, 98 transitions, 330 flow. Second operand 6 states and 490 transitions. [2021-12-16 03:08:00,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 142 transitions, 689 flow [2021-12-16 03:08:00,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 142 transitions, 680 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-16 03:08:00,817 INFO L242 Difference]: Finished difference. Result has 104 places, 110 transitions, 484 flow [2021-12-16 03:08:00,818 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=484, PETRI_PLACES=104, PETRI_TRANSITIONS=110} [2021-12-16 03:08:00,819 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2021-12-16 03:08:00,819 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 110 transitions, 484 flow [2021-12-16 03:08:00,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:00,819 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:00,819 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:00,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 03:08:00,820 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:08:00,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:00,820 INFO L85 PathProgramCache]: Analyzing trace with hash 954321473, now seen corresponding path program 3 times [2021-12-16 03:08:00,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:00,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429741649] [2021-12-16 03:08:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:00,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:00,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:00,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429741649] [2021-12-16 03:08:00,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429741649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:00,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:00,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:08:00,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155165024] [2021-12-16 03:08:00,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:00,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:08:00,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:00,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:08:00,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:08:00,975 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-16 03:08:00,976 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 110 transitions, 484 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:00,976 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:00,976 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-16 03:08:00,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:01,171 INFO L129 PetriNetUnfolder]: 528/1210 cut-off events. [2021-12-16 03:08:01,172 INFO L130 PetriNetUnfolder]: For 1156/1197 co-relation queries the response was YES. [2021-12-16 03:08:01,175 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3106 conditions, 1210 events. 528/1210 cut-off events. For 1156/1197 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7074 event pairs, 79 based on Foata normal form. 24/1170 useless extension candidates. Maximal degree in co-relation 3090. Up to 341 conditions per place. [2021-12-16 03:08:01,180 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 72 selfloop transitions, 36 changer transitions 2/167 dead transitions. [2021-12-16 03:08:01,181 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 167 transitions, 956 flow [2021-12-16 03:08:01,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:08:01,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-16 03:08:01,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 652 transitions. [2021-12-16 03:08:01,183 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8402061855670103 [2021-12-16 03:08:01,183 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 652 transitions. [2021-12-16 03:08:01,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 652 transitions. [2021-12-16 03:08:01,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:01,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 652 transitions. [2021-12-16 03:08:01,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 81.5) internal successors, (652), 8 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:01,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:01,186 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:01,186 INFO L186 Difference]: Start difference. First operand has 104 places, 110 transitions, 484 flow. Second operand 8 states and 652 transitions. [2021-12-16 03:08:01,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 167 transitions, 956 flow [2021-12-16 03:08:01,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 167 transitions, 907 flow, removed 5 selfloop flow, removed 2 redundant places. [2021-12-16 03:08:01,192 INFO L242 Difference]: Finished difference. Result has 114 places, 122 transitions, 674 flow [2021-12-16 03:08:01,192 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=674, PETRI_PLACES=114, PETRI_TRANSITIONS=122} [2021-12-16 03:08:01,192 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 28 predicate places. [2021-12-16 03:08:01,193 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 122 transitions, 674 flow [2021-12-16 03:08:01,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:01,193 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:01,193 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:01,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 03:08:01,194 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:08:01,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:01,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1254726104, now seen corresponding path program 1 times [2021-12-16 03:08:01,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:01,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304156600] [2021-12-16 03:08:01,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:01,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:01,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:01,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304156600] [2021-12-16 03:08:01,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304156600] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:01,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736140601] [2021-12-16 03:08:01,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:01,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:01,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:01,313 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) [2021-12-16 03:08:01,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 03:08:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:01,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 03:08:01,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:01,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:01,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736140601] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:01,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:08:01,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 7] total 12 [2021-12-16 03:08:01,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738847368] [2021-12-16 03:08:01,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:01,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:08:01,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:01,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:08:01,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-16 03:08:01,978 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2021-12-16 03:08:01,978 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 122 transitions, 674 flow. Second operand has 7 states, 7 states have (on average 71.57142857142857) internal successors, (501), 7 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:01,978 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:01,978 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2021-12-16 03:08:01,978 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:02,387 INFO L129 PetriNetUnfolder]: 1298/2750 cut-off events. [2021-12-16 03:08:02,387 INFO L130 PetriNetUnfolder]: For 4376/4422 co-relation queries the response was YES. [2021-12-16 03:08:02,393 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8036 conditions, 2750 events. 1298/2750 cut-off events. For 4376/4422 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19155 event pairs, 128 based on Foata normal form. 13/2550 useless extension candidates. Maximal degree in co-relation 8016. Up to 820 conditions per place. [2021-12-16 03:08:02,405 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 131 selfloop transitions, 54 changer transitions 2/242 dead transitions. [2021-12-16 03:08:02,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 242 transitions, 1716 flow [2021-12-16 03:08:02,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 03:08:02,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-16 03:08:02,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 945 transitions. [2021-12-16 03:08:02,408 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8118556701030928 [2021-12-16 03:08:02,408 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 945 transitions. [2021-12-16 03:08:02,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 945 transitions. [2021-12-16 03:08:02,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:02,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 945 transitions. [2021-12-16 03:08:02,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 78.75) internal successors, (945), 12 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:02,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:02,411 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:02,411 INFO L186 Difference]: Start difference. First operand has 114 places, 122 transitions, 674 flow. Second operand 12 states and 945 transitions. [2021-12-16 03:08:02,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 242 transitions, 1716 flow [2021-12-16 03:08:02,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 242 transitions, 1682 flow, removed 10 selfloop flow, removed 2 redundant places. [2021-12-16 03:08:02,424 INFO L242 Difference]: Finished difference. Result has 129 places, 160 transitions, 1118 flow [2021-12-16 03:08:02,424 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1118, PETRI_PLACES=129, PETRI_TRANSITIONS=160} [2021-12-16 03:08:02,425 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 43 predicate places. [2021-12-16 03:08:02,425 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 160 transitions, 1118 flow [2021-12-16 03:08:02,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 71.57142857142857) internal successors, (501), 7 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:02,425 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:02,425 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:02,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 03:08:02,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-16 03:08:02,639 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:08:02,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:02,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1683261096, now seen corresponding path program 2 times [2021-12-16 03:08:02,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:02,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16113341] [2021-12-16 03:08:02,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:02,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:02,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:02,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16113341] [2021-12-16 03:08:02,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16113341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:02,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:02,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:08:02,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982269506] [2021-12-16 03:08:02,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:02,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:08:02,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:02,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:08:02,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:08:02,743 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-16 03:08:02,743 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 160 transitions, 1118 flow. Second operand has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:02,744 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:02,744 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-16 03:08:02,744 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:03,052 INFO L129 PetriNetUnfolder]: 1015/2405 cut-off events. [2021-12-16 03:08:03,052 INFO L130 PetriNetUnfolder]: For 7256/7379 co-relation queries the response was YES. [2021-12-16 03:08:03,059 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8656 conditions, 2405 events. 1015/2405 cut-off events. For 7256/7379 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 17228 event pairs, 190 based on Foata normal form. 55/2395 useless extension candidates. Maximal degree in co-relation 8629. Up to 887 conditions per place. [2021-12-16 03:08:03,070 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 90 selfloop transitions, 44 changer transitions 2/204 dead transitions. [2021-12-16 03:08:03,070 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 204 transitions, 1660 flow [2021-12-16 03:08:03,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:08:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:08:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 562 transitions. [2021-12-16 03:08:03,072 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8276877761413843 [2021-12-16 03:08:03,072 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 562 transitions. [2021-12-16 03:08:03,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 562 transitions. [2021-12-16 03:08:03,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:03,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 562 transitions. [2021-12-16 03:08:03,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.28571428571429) internal successors, (562), 7 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:03,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:03,074 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:03,075 INFO L186 Difference]: Start difference. First operand has 129 places, 160 transitions, 1118 flow. Second operand 7 states and 562 transitions. [2021-12-16 03:08:03,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 204 transitions, 1660 flow [2021-12-16 03:08:03,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 204 transitions, 1586 flow, removed 37 selfloop flow, removed 0 redundant places. [2021-12-16 03:08:03,102 INFO L242 Difference]: Finished difference. Result has 137 places, 164 transitions, 1244 flow [2021-12-16 03:08:03,102 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1244, PETRI_PLACES=137, PETRI_TRANSITIONS=164} [2021-12-16 03:08:03,103 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 51 predicate places. [2021-12-16 03:08:03,103 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 164 transitions, 1244 flow [2021-12-16 03:08:03,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:03,104 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:03,104 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:03,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 03:08:03,105 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:08:03,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:03,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1549084656, now seen corresponding path program 1 times [2021-12-16 03:08:03,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:03,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170529406] [2021-12-16 03:08:03,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:03,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:03,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:03,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170529406] [2021-12-16 03:08:03,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170529406] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:03,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:03,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:08:03,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686690306] [2021-12-16 03:08:03,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:03,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:08:03,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:03,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:08:03,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:08:03,198 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-12-16 03:08:03,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 164 transitions, 1244 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:03,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:03,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-12-16 03:08:03,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:03,632 INFO L129 PetriNetUnfolder]: 1244/3054 cut-off events. [2021-12-16 03:08:03,632 INFO L130 PetriNetUnfolder]: For 9223/9626 co-relation queries the response was YES. [2021-12-16 03:08:03,644 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11185 conditions, 3054 events. 1244/3054 cut-off events. For 9223/9626 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 24198 event pairs, 223 based on Foata normal form. 104/3050 useless extension candidates. Maximal degree in co-relation 11156. Up to 1056 conditions per place. [2021-12-16 03:08:03,660 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 77 selfloop transitions, 47 changer transitions 0/206 dead transitions. [2021-12-16 03:08:03,661 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 206 transitions, 1740 flow [2021-12-16 03:08:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:08:03,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:08:03,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2021-12-16 03:08:03,663 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2021-12-16 03:08:03,663 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2021-12-16 03:08:03,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2021-12-16 03:08:03,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:03,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2021-12-16 03:08:03,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:03,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:03,666 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:03,666 INFO L186 Difference]: Start difference. First operand has 137 places, 164 transitions, 1244 flow. Second operand 6 states and 486 transitions. [2021-12-16 03:08:03,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 206 transitions, 1740 flow [2021-12-16 03:08:03,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 206 transitions, 1729 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-16 03:08:03,693 INFO L242 Difference]: Finished difference. Result has 144 places, 174 transitions, 1485 flow [2021-12-16 03:08:03,694 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1485, PETRI_PLACES=144, PETRI_TRANSITIONS=174} [2021-12-16 03:08:03,696 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 58 predicate places. [2021-12-16 03:08:03,696 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 174 transitions, 1485 flow [2021-12-16 03:08:03,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:03,697 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:03,697 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:03,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 03:08:03,697 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:08:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:03,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1932626054, now seen corresponding path program 3 times [2021-12-16 03:08:03,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:03,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149231357] [2021-12-16 03:08:03,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:03,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:03,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:03,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149231357] [2021-12-16 03:08:03,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149231357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:03,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:03,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:08:03,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265335221] [2021-12-16 03:08:03,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:03,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:08:03,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:03,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:08:03,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:08:03,798 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-16 03:08:03,799 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 174 transitions, 1485 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:03,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:03,799 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-16 03:08:03,799 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:04,191 INFO L129 PetriNetUnfolder]: 1237/3174 cut-off events. [2021-12-16 03:08:04,192 INFO L130 PetriNetUnfolder]: For 12836/13018 co-relation queries the response was YES. [2021-12-16 03:08:04,203 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12662 conditions, 3174 events. 1237/3174 cut-off events. For 12836/13018 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 25457 event pairs, 343 based on Foata normal form. 51/3131 useless extension candidates. Maximal degree in co-relation 12629. Up to 1822 conditions per place. [2021-12-16 03:08:04,223 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 97 selfloop transitions, 30 changer transitions 2/197 dead transitions. [2021-12-16 03:08:04,224 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 197 transitions, 1897 flow [2021-12-16 03:08:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:08:04,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-16 03:08:04,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 405 transitions. [2021-12-16 03:08:04,225 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2021-12-16 03:08:04,225 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 405 transitions. [2021-12-16 03:08:04,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 405 transitions. [2021-12-16 03:08:04,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:04,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 405 transitions. [2021-12-16 03:08:04,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:04,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:04,227 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:04,228 INFO L186 Difference]: Start difference. First operand has 144 places, 174 transitions, 1485 flow. Second operand 5 states and 405 transitions. [2021-12-16 03:08:04,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 197 transitions, 1897 flow [2021-12-16 03:08:04,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 197 transitions, 1830 flow, removed 13 selfloop flow, removed 2 redundant places. [2021-12-16 03:08:04,267 INFO L242 Difference]: Finished difference. Result has 148 places, 176 transitions, 1552 flow [2021-12-16 03:08:04,267 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1552, PETRI_PLACES=148, PETRI_TRANSITIONS=176} [2021-12-16 03:08:04,268 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 62 predicate places. [2021-12-16 03:08:04,268 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 176 transitions, 1552 flow [2021-12-16 03:08:04,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:04,269 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:04,269 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:04,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 03:08:04,269 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:08:04,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:04,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1062314258, now seen corresponding path program 2 times [2021-12-16 03:08:04,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:04,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844330936] [2021-12-16 03:08:04,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:04,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:04,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:04,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844330936] [2021-12-16 03:08:04,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844330936] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:04,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:04,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:08:04,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744237965] [2021-12-16 03:08:04,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:04,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:08:04,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:04,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:08:04,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:08:04,410 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-12-16 03:08:04,410 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 176 transitions, 1552 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:04,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:04,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-12-16 03:08:04,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:04,932 INFO L129 PetriNetUnfolder]: 1548/4060 cut-off events. [2021-12-16 03:08:04,933 INFO L130 PetriNetUnfolder]: For 16845/17478 co-relation queries the response was YES. [2021-12-16 03:08:04,954 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16223 conditions, 4060 events. 1548/4060 cut-off events. For 16845/17478 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 35358 event pairs, 223 based on Foata normal form. 133/4045 useless extension candidates. Maximal degree in co-relation 16188. Up to 1290 conditions per place. [2021-12-16 03:08:04,973 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 94 selfloop transitions, 74 changer transitions 0/250 dead transitions. [2021-12-16 03:08:04,974 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 250 transitions, 2698 flow [2021-12-16 03:08:04,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:08:04,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-16 03:08:04,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 418 transitions. [2021-12-16 03:08:04,975 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8618556701030928 [2021-12-16 03:08:04,975 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 418 transitions. [2021-12-16 03:08:04,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 418 transitions. [2021-12-16 03:08:04,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:04,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 418 transitions. [2021-12-16 03:08:04,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.6) internal successors, (418), 5 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:04,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:04,978 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:04,978 INFO L186 Difference]: Start difference. First operand has 148 places, 176 transitions, 1552 flow. Second operand 5 states and 418 transitions. [2021-12-16 03:08:04,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 250 transitions, 2698 flow [2021-12-16 03:08:05,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 250 transitions, 2651 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-16 03:08:05,033 INFO L242 Difference]: Finished difference. Result has 153 places, 210 transitions, 2306 flow [2021-12-16 03:08:05,034 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2306, PETRI_PLACES=153, PETRI_TRANSITIONS=210} [2021-12-16 03:08:05,034 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 67 predicate places. [2021-12-16 03:08:05,035 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 210 transitions, 2306 flow [2021-12-16 03:08:05,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:05,035 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:05,035 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:05,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 03:08:05,036 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:08:05,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:05,036 INFO L85 PathProgramCache]: Analyzing trace with hash 496869252, now seen corresponding path program 3 times [2021-12-16 03:08:05,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:05,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987146646] [2021-12-16 03:08:05,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:05,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:05,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:05,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987146646] [2021-12-16 03:08:05,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987146646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:05,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:05,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:08:05,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155034426] [2021-12-16 03:08:05,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:05,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:08:05,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:05,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:08:05,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:08:05,141 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-12-16 03:08:05,142 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 210 transitions, 2306 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:05,142 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:05,142 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-12-16 03:08:05,142 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:05,803 INFO L129 PetriNetUnfolder]: 1827/4755 cut-off events. [2021-12-16 03:08:05,803 INFO L130 PetriNetUnfolder]: For 24401/25097 co-relation queries the response was YES. [2021-12-16 03:08:05,824 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20532 conditions, 4755 events. 1827/4755 cut-off events. For 24401/25097 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 42786 event pairs, 192 based on Foata normal form. 157/4770 useless extension candidates. Maximal degree in co-relation 20494. Up to 1260 conditions per place. [2021-12-16 03:08:05,845 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 112 selfloop transitions, 85 changer transitions 3/282 dead transitions. [2021-12-16 03:08:05,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 282 transitions, 3557 flow [2021-12-16 03:08:05,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:08:05,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-16 03:08:05,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 414 transitions. [2021-12-16 03:08:05,847 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8536082474226804 [2021-12-16 03:08:05,847 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 414 transitions. [2021-12-16 03:08:05,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 414 transitions. [2021-12-16 03:08:05,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:05,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 414 transitions. [2021-12-16 03:08:05,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:05,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:05,849 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:05,850 INFO L186 Difference]: Start difference. First operand has 153 places, 210 transitions, 2306 flow. Second operand 5 states and 414 transitions. [2021-12-16 03:08:05,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 282 transitions, 3557 flow [2021-12-16 03:08:05,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 282 transitions, 3472 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-16 03:08:05,917 INFO L242 Difference]: Finished difference. Result has 160 places, 238 transitions, 3048 flow [2021-12-16 03:08:05,918 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2245, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3048, PETRI_PLACES=160, PETRI_TRANSITIONS=238} [2021-12-16 03:08:05,918 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 74 predicate places. [2021-12-16 03:08:05,918 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 238 transitions, 3048 flow [2021-12-16 03:08:05,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:05,918 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:05,919 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:05,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 03:08:05,919 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:08:05,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:05,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1930595810, now seen corresponding path program 4 times [2021-12-16 03:08:05,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:05,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383857231] [2021-12-16 03:08:05,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:05,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:05,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:05,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383857231] [2021-12-16 03:08:05,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383857231] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:05,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:05,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:08:05,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60401118] [2021-12-16 03:08:05,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:05,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:08:05,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:05,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:08:05,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:08:05,983 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-12-16 03:08:05,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 238 transitions, 3048 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:05,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:05,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-12-16 03:08:05,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:06,296 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([270] L80-->L83: Formula: (and (= (+ v_~L~0_14 1) v_~L~0_15) (= v_~q~0_13 (+ v_~M~0_20 v_~q~0_14))) InVars {~q~0=v_~q~0_14, ~M~0=v_~M~0_20, ~L~0=v_~L~0_15} OutVars{~q~0=v_~q~0_13, ~M~0=v_~M~0_20, ~L~0=v_~L~0_14, thread3Thread1of1ForFork2_#t~post2=|v_thread3Thread1of1ForFork2_#t~post2_1|} AuxVars[] AssignedVars[~L~0, ~q~0, thread3Thread1of1ForFork2_#t~post2][190], [Black: 122#(or (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0)), Black: 123#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (or (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))), Black: 131#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))), Black: 129#(and (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))), Black: 640#(or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))), Black: 127#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= ~N~0 ~L~0) (= 0 thread1Thread1of1ForFork0_~cond~0)), Black: 644#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)), Black: 646#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread2Thread1of1ForFork1_~cond~1) (= 0 thread1Thread1of1ForFork0_~cond~0)), 166#true, Black: 140#(or (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0)), 106#true, Black: 141#(< (* 4294967296 (div ~N~0 4294967296)) ~N~0), 627#true, Black: 144#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0)), Black: 142#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 657#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (= ~N~0 ~L~0)), Black: 659#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= ~N~0 ~L~0) (= 0 thread1Thread1of1ForFork0_~cond~0)), 7#L46-1true, 103#true, 68#L99-4true, Black: 666#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (or (and (= 0 thread2Thread1of1ForFork1_~cond~1) (<= ~N~0 (+ (* 4294967296 (div ~N~0 4294967296)) 1))) (and (< (+ (* 4294967296 (div ~N~0 4294967296)) 1) ~N~0) (= 1 thread2Thread1of1ForFork1_~cond~1)))), Black: 669#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread2Thread1of1ForFork1_~cond~1) (= 0 thread1Thread1of1ForFork0_~cond~0)), 120#true, Black: 154#(or (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0))), Black: 665#(or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))), 8#L83true, Black: 157#(and (= 1 thread1Thread1of1ForFork0_~cond~0) (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0)), Black: 153#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (= ~N~0 ~L~0)), Black: 155#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 686#true, Black: 677#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (or (and (= 0 thread2Thread1of1ForFork1_~cond~1) (<= ~N~0 (+ (* 4294967296 (div ~N~0 4294967296)) 1))) (and (< (+ (* 4294967296 (div ~N~0 4294967296)) 1) ~N~0) (= 1 thread2Thread1of1ForFork1_~cond~1)))), Black: 680#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread2Thread1of1ForFork1_~cond~1) (= 0 thread1Thread1of1ForFork0_~cond~0)), Black: 171#(<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0), Black: 676#(or (and (= 0 thread2Thread1of1ForFork1_~cond~1) (<= ~N~0 (+ (* 4294967296 (div ~N~0 4294967296)) 1))) (and (< (+ (* 4294967296 (div ~N~0 4294967296)) 1) ~N~0) (= 1 thread2Thread1of1ForFork1_~cond~1))), Black: 506#(or (< 1 (mod ~N~0 4294967296)) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0) (= 0 (mod thread1Thread1of1ForFork0_~cond~0 256))), Black: 495#(or (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0) (< 0 (mod thread2Thread1of1ForFork1_~cond~1 256))), 10#L72true, 150#true, Black: 615#(and (or (< 1 (mod ~N~0 4294967296)) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0)) (or (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0) (< 0 (mod thread2Thread1of1ForFork1_~cond~1 256)))), Black: 619#(and (or (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0) (< 0 (mod thread2Thread1of1ForFork1_~cond~1 256))) (or (< 1 (mod ~N~0 4294967296)) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0) (= 0 (mod thread1Thread1of1ForFork0_~cond~0 256)))), Black: 499#(or (< 1 (mod ~N~0 4294967296)) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0)), 674#true, Black: 109#(and (= ~p~0 0) (= ~q~0 0)), Black: 632#(<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0)]) [2021-12-16 03:08:06,296 INFO L384 tUnfolder$Statistics]: this new event has 50 ancestors and is cut-off event [2021-12-16 03:08:06,297 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2021-12-16 03:08:06,297 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2021-12-16 03:08:06,297 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2021-12-16 03:08:06,297 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([261] L72-->L64: Formula: (not (= 0 (mod v_thread2Thread1of1ForFork1_~cond~1_5 256))) InVars {thread2Thread1of1ForFork1_~cond~1=v_thread2Thread1of1ForFork1_~cond~1_5} OutVars{thread2Thread1of1ForFork1_~cond~1=v_thread2Thread1of1ForFork1_~cond~1_5} AuxVars[] AssignedVars[][151], [Black: 122#(or (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0)), Black: 123#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (or (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))), Black: 131#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))), Black: 129#(and (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))), Black: 640#(or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))), Black: 127#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= ~N~0 ~L~0) (= 0 thread1Thread1of1ForFork0_~cond~0)), Black: 644#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)), Black: 646#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread2Thread1of1ForFork1_~cond~1) (= 0 thread1Thread1of1ForFork0_~cond~0)), 106#true, Black: 140#(or (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0)), Black: 141#(< (* 4294967296 (div ~N~0 4294967296)) ~N~0), Black: 144#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0)), Black: 142#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 657#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (= ~N~0 ~L~0)), Black: 659#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= ~N~0 ~L~0) (= 0 thread1Thread1of1ForFork0_~cond~0)), 7#L46-1true, 22#L80true, 103#true, 68#L99-4true, Black: 666#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (or (and (= 0 thread2Thread1of1ForFork1_~cond~1) (<= ~N~0 (+ (* 4294967296 (div ~N~0 4294967296)) 1))) (and (< (+ (* 4294967296 (div ~N~0 4294967296)) 1) ~N~0) (= 1 thread2Thread1of1ForFork1_~cond~1)))), Black: 669#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread2Thread1of1ForFork1_~cond~1) (= 0 thread1Thread1of1ForFork0_~cond~0)), 632#(<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0), 120#true, Black: 154#(or (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0))), Black: 665#(or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))), Black: 157#(and (= 1 thread1Thread1of1ForFork0_~cond~0) (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0)), Black: 153#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (= ~N~0 ~L~0)), 83#L64true, Black: 155#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 686#true, Black: 677#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (or (and (= 0 thread2Thread1of1ForFork1_~cond~1) (<= ~N~0 (+ (* 4294967296 (div ~N~0 4294967296)) 1))) (and (< (+ (* 4294967296 (div ~N~0 4294967296)) 1) ~N~0) (= 1 thread2Thread1of1ForFork1_~cond~1)))), Black: 680#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread2Thread1of1ForFork1_~cond~1) (= 0 thread1Thread1of1ForFork0_~cond~0)), Black: 676#(or (and (= 0 thread2Thread1of1ForFork1_~cond~1) (<= ~N~0 (+ (* 4294967296 (div ~N~0 4294967296)) 1))) (and (< (+ (* 4294967296 (div ~N~0 4294967296)) 1) ~N~0) (= 1 thread2Thread1of1ForFork1_~cond~1))), Black: 506#(or (< 1 (mod ~N~0 4294967296)) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0) (= 0 (mod thread1Thread1of1ForFork0_~cond~0 256))), Black: 495#(or (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0) (< 0 (mod thread2Thread1of1ForFork1_~cond~1 256))), 150#true, Black: 615#(and (or (< 1 (mod ~N~0 4294967296)) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0)) (or (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0) (< 0 (mod thread2Thread1of1ForFork1_~cond~1 256)))), 171#(<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0), Black: 619#(and (or (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0) (< 0 (mod thread2Thread1of1ForFork1_~cond~1 256))) (or (< 1 (mod ~N~0 4294967296)) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0) (= 0 (mod thread1Thread1of1ForFork0_~cond~0 256)))), Black: 499#(or (< 1 (mod ~N~0 4294967296)) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0)), 674#true, Black: 109#(and (= ~p~0 0) (= ~q~0 0)), Black: 627#true]) [2021-12-16 03:08:06,297 INFO L384 tUnfolder$Statistics]: this new event has 50 ancestors and is cut-off event [2021-12-16 03:08:06,297 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2021-12-16 03:08:06,297 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2021-12-16 03:08:06,297 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2021-12-16 03:08:06,484 INFO L129 PetriNetUnfolder]: 1751/4524 cut-off events. [2021-12-16 03:08:06,484 INFO L130 PetriNetUnfolder]: For 31369/31990 co-relation queries the response was YES. [2021-12-16 03:08:06,506 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21488 conditions, 4524 events. 1751/4524 cut-off events. For 31369/31990 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 40029 event pairs, 176 based on Foata normal form. 139/4512 useless extension candidates. Maximal degree in co-relation 21447. Up to 1500 conditions per place. [2021-12-16 03:08:06,526 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 96 selfloop transitions, 103 changer transitions 3/284 dead transitions. [2021-12-16 03:08:06,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 284 transitions, 3873 flow [2021-12-16 03:08:06,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:08:06,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-16 03:08:06,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 417 transitions. [2021-12-16 03:08:06,528 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8597938144329897 [2021-12-16 03:08:06,528 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 417 transitions. [2021-12-16 03:08:06,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 417 transitions. [2021-12-16 03:08:06,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:06,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 417 transitions. [2021-12-16 03:08:06,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:06,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:06,530 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:06,530 INFO L186 Difference]: Start difference. First operand has 160 places, 238 transitions, 3048 flow. Second operand 5 states and 417 transitions. [2021-12-16 03:08:06,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 284 transitions, 3873 flow [2021-12-16 03:08:06,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 284 transitions, 3851 flow, removed 11 selfloop flow, removed 0 redundant places. [2021-12-16 03:08:06,680 INFO L242 Difference]: Finished difference. Result has 167 places, 250 transitions, 3488 flow [2021-12-16 03:08:06,681 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2987, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3488, PETRI_PLACES=167, PETRI_TRANSITIONS=250} [2021-12-16 03:08:06,681 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 81 predicate places. [2021-12-16 03:08:06,681 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 250 transitions, 3488 flow [2021-12-16 03:08:06,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:06,682 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:06,682 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:06,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 03:08:06,682 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:08:06,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:06,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1743527430, now seen corresponding path program 5 times [2021-12-16 03:08:06,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:06,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508915650] [2021-12-16 03:08:06,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:06,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:06,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:06,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508915650] [2021-12-16 03:08:06,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508915650] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:06,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013035043] [2021-12-16 03:08:06,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 03:08:06,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:06,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:06,776 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) [2021-12-16 03:08:06,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 03:08:06,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:08:06,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:08:06,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 03:08:06,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:07,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:07,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013035043] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:07,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:08:07,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2021-12-16 03:08:07,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130415733] [2021-12-16 03:08:07,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:07,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:08:07,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:07,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:08:07,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:08:07,184 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2021-12-16 03:08:07,185 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 250 transitions, 3488 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:07,185 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:07,185 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2021-12-16 03:08:07,185 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:08,282 INFO L129 PetriNetUnfolder]: 3535/8816 cut-off events. [2021-12-16 03:08:08,282 INFO L130 PetriNetUnfolder]: For 69999/70060 co-relation queries the response was YES. [2021-12-16 03:08:08,336 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42344 conditions, 8816 events. 3535/8816 cut-off events. For 69999/70060 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 85821 event pairs, 439 based on Foata normal form. 43/8696 useless extension candidates. Maximal degree in co-relation 42299. Up to 1519 conditions per place. [2021-12-16 03:08:08,390 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 296 selfloop transitions, 145 changer transitions 3/499 dead transitions. [2021-12-16 03:08:08,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 499 transitions, 7767 flow [2021-12-16 03:08:08,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:08:08,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:08:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 573 transitions. [2021-12-16 03:08:08,393 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8438880706921944 [2021-12-16 03:08:08,393 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 573 transitions. [2021-12-16 03:08:08,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 573 transitions. [2021-12-16 03:08:08,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:08,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 573 transitions. [2021-12-16 03:08:08,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.85714285714286) internal successors, (573), 7 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:08,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:08,396 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:08,396 INFO L186 Difference]: Start difference. First operand has 167 places, 250 transitions, 3488 flow. Second operand 7 states and 573 transitions. [2021-12-16 03:08:08,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 499 transitions, 7767 flow [2021-12-16 03:08:08,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 499 transitions, 7571 flow, removed 9 selfloop flow, removed 1 redundant places. [2021-12-16 03:08:08,608 INFO L242 Difference]: Finished difference. Result has 177 places, 360 transitions, 5605 flow [2021-12-16 03:08:08,608 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3389, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5605, PETRI_PLACES=177, PETRI_TRANSITIONS=360} [2021-12-16 03:08:08,609 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 91 predicate places. [2021-12-16 03:08:08,609 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 360 transitions, 5605 flow [2021-12-16 03:08:08,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:08,609 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:08,609 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:08,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 03:08:08,810 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,SelfDestructingSolverStorable12 [2021-12-16 03:08:08,810 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:08:08,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:08,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1264518246, now seen corresponding path program 6 times [2021-12-16 03:08:08,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:08,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990669636] [2021-12-16 03:08:08,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:08,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:08,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:08,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:08,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990669636] [2021-12-16 03:08:08,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990669636] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:08,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019733062] [2021-12-16 03:08:08,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 03:08:08,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:08,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:08,924 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) [2021-12-16 03:08:08,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 03:08:09,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-16 03:08:09,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:08:09,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 03:08:09,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:09,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:09,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019733062] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:09,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:08:09,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2021-12-16 03:08:09,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839454637] [2021-12-16 03:08:09,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:09,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:08:09,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:09,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:08:09,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:08:09,725 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2021-12-16 03:08:09,726 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 360 transitions, 5605 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:09,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:09,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2021-12-16 03:08:09,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:10,943 INFO L129 PetriNetUnfolder]: 3683/8975 cut-off events. [2021-12-16 03:08:10,943 INFO L130 PetriNetUnfolder]: For 92696/92696 co-relation queries the response was YES. [2021-12-16 03:08:11,007 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49538 conditions, 8975 events. 3683/8975 cut-off events. For 92696/92696 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 87243 event pairs, 415 based on Foata normal form. 8/8868 useless extension candidates. Maximal degree in co-relation 49489. Up to 2419 conditions per place. [2021-12-16 03:08:11,062 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 266 selfloop transitions, 177 changer transitions 5/503 dead transitions. [2021-12-16 03:08:11,062 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 503 transitions, 8445 flow [2021-12-16 03:08:11,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:08:11,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:08:11,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 570 transitions. [2021-12-16 03:08:11,064 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8394698085419735 [2021-12-16 03:08:11,064 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 570 transitions. [2021-12-16 03:08:11,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 570 transitions. [2021-12-16 03:08:11,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:11,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 570 transitions. [2021-12-16 03:08:11,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:11,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:11,067 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:11,067 INFO L186 Difference]: Start difference. First operand has 177 places, 360 transitions, 5605 flow. Second operand 7 states and 570 transitions. [2021-12-16 03:08:11,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 503 transitions, 8445 flow [2021-12-16 03:08:11,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 503 transitions, 8365 flow, removed 40 selfloop flow, removed 0 redundant places. [2021-12-16 03:08:11,612 INFO L242 Difference]: Finished difference. Result has 189 places, 392 transitions, 6808 flow [2021-12-16 03:08:11,613 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=5545, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6808, PETRI_PLACES=189, PETRI_TRANSITIONS=392} [2021-12-16 03:08:11,613 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 103 predicate places. [2021-12-16 03:08:11,614 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 392 transitions, 6808 flow [2021-12-16 03:08:11,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:11,614 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:11,614 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:11,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 03:08:11,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:11,839 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:08:11,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:11,840 INFO L85 PathProgramCache]: Analyzing trace with hash 160410386, now seen corresponding path program 7 times [2021-12-16 03:08:11,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:11,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786372833] [2021-12-16 03:08:11,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:11,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:11,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:11,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786372833] [2021-12-16 03:08:11,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786372833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:11,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:11,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:08:11,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134734323] [2021-12-16 03:08:11,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:11,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:08:11,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:11,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:08:11,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:08:11,922 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-12-16 03:08:11,923 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 392 transitions, 6808 flow. Second operand has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:11,923 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:11,923 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-12-16 03:08:11,923 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:13,235 INFO L129 PetriNetUnfolder]: 3257/8308 cut-off events. [2021-12-16 03:08:13,235 INFO L130 PetriNetUnfolder]: For 115256/117594 co-relation queries the response was YES. [2021-12-16 03:08:13,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51458 conditions, 8308 events. 3257/8308 cut-off events. For 115256/117594 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 81654 event pairs, 411 based on Foata normal form. 362/8444 useless extension candidates. Maximal degree in co-relation 51403. Up to 1802 conditions per place. [2021-12-16 03:08:13,324 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 164 selfloop transitions, 204 changer transitions 1/492 dead transitions. [2021-12-16 03:08:13,324 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 492 transitions, 9245 flow [2021-12-16 03:08:13,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:08:13,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:08:13,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 501 transitions. [2021-12-16 03:08:13,325 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8608247422680413 [2021-12-16 03:08:13,326 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 501 transitions. [2021-12-16 03:08:13,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 501 transitions. [2021-12-16 03:08:13,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:13,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 501 transitions. [2021-12-16 03:08:13,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.5) internal successors, (501), 6 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:13,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:13,328 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:13,328 INFO L186 Difference]: Start difference. First operand has 189 places, 392 transitions, 6808 flow. Second operand 6 states and 501 transitions. [2021-12-16 03:08:13,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 492 transitions, 9245 flow [2021-12-16 03:08:13,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 492 transitions, 9237 flow, removed 4 selfloop flow, removed 0 redundant places. [2021-12-16 03:08:13,557 INFO L242 Difference]: Finished difference. Result has 195 places, 429 transitions, 8170 flow [2021-12-16 03:08:13,557 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=6800, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8170, PETRI_PLACES=195, PETRI_TRANSITIONS=429} [2021-12-16 03:08:13,558 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 109 predicate places. [2021-12-16 03:08:13,558 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 429 transitions, 8170 flow [2021-12-16 03:08:13,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:13,558 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:13,558 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:13,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 03:08:13,559 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:08:13,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:13,559 INFO L85 PathProgramCache]: Analyzing trace with hash -313546284, now seen corresponding path program 4 times [2021-12-16 03:08:13,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:13,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10060587] [2021-12-16 03:08:13,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:13,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:13,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:13,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10060587] [2021-12-16 03:08:13,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10060587] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:13,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:13,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:08:13,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004395860] [2021-12-16 03:08:13,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:13,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:08:13,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:13,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:08:13,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:08:13,606 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-16 03:08:13,607 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 429 transitions, 8170 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:13,607 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:13,607 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-16 03:08:13,607 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:15,108 INFO L129 PetriNetUnfolder]: 3480/8909 cut-off events. [2021-12-16 03:08:15,108 INFO L130 PetriNetUnfolder]: For 130700/131320 co-relation queries the response was YES. [2021-12-16 03:08:15,153 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55838 conditions, 8909 events. 3480/8909 cut-off events. For 130700/131320 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 87595 event pairs, 609 based on Foata normal form. 157/8818 useless extension candidates. Maximal degree in co-relation 55781. Up to 5106 conditions per place. [2021-12-16 03:08:15,196 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 349 selfloop transitions, 42 changer transitions 7/479 dead transitions. [2021-12-16 03:08:15,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 479 transitions, 9626 flow [2021-12-16 03:08:15,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:08:15,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:08:15,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 476 transitions. [2021-12-16 03:08:15,199 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8178694158075601 [2021-12-16 03:08:15,199 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 476 transitions. [2021-12-16 03:08:15,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 476 transitions. [2021-12-16 03:08:15,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:15,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 476 transitions. [2021-12-16 03:08:15,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:15,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:15,201 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:15,201 INFO L186 Difference]: Start difference. First operand has 195 places, 429 transitions, 8170 flow. Second operand 6 states and 476 transitions. [2021-12-16 03:08:15,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 479 transitions, 9626 flow [2021-12-16 03:08:15,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 479 transitions, 9368 flow, removed 11 selfloop flow, removed 3 redundant places. [2021-12-16 03:08:15,474 INFO L242 Difference]: Finished difference. Result has 200 places, 423 transitions, 7845 flow [2021-12-16 03:08:15,474 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=7665, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7845, PETRI_PLACES=200, PETRI_TRANSITIONS=423} [2021-12-16 03:08:15,475 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 114 predicate places. [2021-12-16 03:08:15,475 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 423 transitions, 7845 flow [2021-12-16 03:08:15,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:15,475 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:15,475 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:15,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 03:08:15,475 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:08:15,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:15,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1856250638, now seen corresponding path program 8 times [2021-12-16 03:08:15,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:15,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286186195] [2021-12-16 03:08:15,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:15,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:15,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:15,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286186195] [2021-12-16 03:08:15,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286186195] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:15,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170925087] [2021-12-16 03:08:15,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:08:15,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:15,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:15,549 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) [2021-12-16 03:08:15,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 03:08:15,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:08:15,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:08:15,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 03:08:15,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:15,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:16,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170925087] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:16,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:16,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2021-12-16 03:08:16,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138989046] [2021-12-16 03:08:16,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:16,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 03:08:16,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:16,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 03:08:16,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-12-16 03:08:16,434 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2021-12-16 03:08:16,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 423 transitions, 7845 flow. Second operand has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:16,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:16,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2021-12-16 03:08:16,435 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:20,078 INFO L129 PetriNetUnfolder]: 7939/19589 cut-off events. [2021-12-16 03:08:20,078 INFO L130 PetriNetUnfolder]: For 271615/272374 co-relation queries the response was YES. [2021-12-16 03:08:20,193 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117804 conditions, 19589 events. 7939/19589 cut-off events. For 271615/272374 co-relation queries the response was YES. Maximal size of possible extension queue 1500. Compared 220099 event pairs, 1036 based on Foata normal form. 509/19654 useless extension candidates. Maximal degree in co-relation 117744. Up to 4666 conditions per place. [2021-12-16 03:08:20,285 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 663 selfloop transitions, 204 changer transitions 22/984 dead transitions. [2021-12-16 03:08:20,285 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 984 transitions, 20052 flow [2021-12-16 03:08:20,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 03:08:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-16 03:08:20,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1097 transitions. [2021-12-16 03:08:20,287 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7539518900343642 [2021-12-16 03:08:20,287 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1097 transitions. [2021-12-16 03:08:20,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1097 transitions. [2021-12-16 03:08:20,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:20,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1097 transitions. [2021-12-16 03:08:20,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 73.13333333333334) internal successors, (1097), 15 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:20,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:20,292 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:20,292 INFO L186 Difference]: Start difference. First operand has 200 places, 423 transitions, 7845 flow. Second operand 15 states and 1097 transitions. [2021-12-16 03:08:20,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 984 transitions, 20052 flow [2021-12-16 03:08:20,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 984 transitions, 19998 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-12-16 03:08:20,973 INFO L242 Difference]: Finished difference. Result has 224 places, 567 transitions, 11362 flow [2021-12-16 03:08:20,973 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=7783, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=11362, PETRI_PLACES=224, PETRI_TRANSITIONS=567} [2021-12-16 03:08:20,974 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 138 predicate places. [2021-12-16 03:08:20,974 INFO L470 AbstractCegarLoop]: Abstraction has has 224 places, 567 transitions, 11362 flow [2021-12-16 03:08:20,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:20,974 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:20,974 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:20,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 03:08:21,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 03:08:21,175 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:08:21,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:21,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1264114124, now seen corresponding path program 9 times [2021-12-16 03:08:21,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:21,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112151234] [2021-12-16 03:08:21,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:21,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:21,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:21,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112151234] [2021-12-16 03:08:21,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112151234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:21,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:21,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:08:21,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123912222] [2021-12-16 03:08:21,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:21,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:08:21,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:21,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:08:21,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:08:21,271 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-12-16 03:08:21,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 567 transitions, 11362 flow. Second operand has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:21,272 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:21,272 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-12-16 03:08:21,272 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:25,616 INFO L129 PetriNetUnfolder]: 9117/21755 cut-off events. [2021-12-16 03:08:25,616 INFO L130 PetriNetUnfolder]: For 404301/410756 co-relation queries the response was YES. [2021-12-16 03:08:26,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151697 conditions, 21755 events. 9117/21755 cut-off events. For 404301/410756 co-relation queries the response was YES. Maximal size of possible extension queue 1697. Compared 244483 event pairs, 588 based on Foata normal form. 1046/22375 useless extension candidates. Maximal degree in co-relation 151626. Up to 4546 conditions per place. [2021-12-16 03:08:26,158 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 350 selfloop transitions, 312 changer transitions 5/842 dead transitions. [2021-12-16 03:08:26,159 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 842 transitions, 18339 flow [2021-12-16 03:08:26,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:08:26,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:08:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 580 transitions. [2021-12-16 03:08:26,160 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8541973490427098 [2021-12-16 03:08:26,160 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 580 transitions. [2021-12-16 03:08:26,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 580 transitions. [2021-12-16 03:08:26,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:26,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 580 transitions. [2021-12-16 03:08:26,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.85714285714286) internal successors, (580), 7 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:26,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:26,163 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:26,163 INFO L186 Difference]: Start difference. First operand has 224 places, 567 transitions, 11362 flow. Second operand 7 states and 580 transitions. [2021-12-16 03:08:26,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 842 transitions, 18339 flow [2021-12-16 03:08:27,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 842 transitions, 18076 flow, removed 69 selfloop flow, removed 5 redundant places. [2021-12-16 03:08:27,230 INFO L242 Difference]: Finished difference. Result has 227 places, 683 transitions, 14893 flow [2021-12-16 03:08:27,231 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=11149, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14893, PETRI_PLACES=227, PETRI_TRANSITIONS=683} [2021-12-16 03:08:27,231 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 141 predicate places. [2021-12-16 03:08:27,231 INFO L470 AbstractCegarLoop]: Abstraction has has 227 places, 683 transitions, 14893 flow [2021-12-16 03:08:27,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:27,232 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:27,232 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:27,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-16 03:08:27,232 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:08:27,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:27,232 INFO L85 PathProgramCache]: Analyzing trace with hash 414098696, now seen corresponding path program 10 times [2021-12-16 03:08:27,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:27,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445070604] [2021-12-16 03:08:27,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:27,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:27,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:27,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445070604] [2021-12-16 03:08:27,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445070604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:27,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:27,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:08:27,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600189260] [2021-12-16 03:08:27,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:27,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:08:27,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:27,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:08:27,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:08:27,292 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-16 03:08:27,293 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 683 transitions, 14893 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:27,293 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:27,293 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-16 03:08:27,293 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:32,878 INFO L129 PetriNetUnfolder]: 10838/25209 cut-off events. [2021-12-16 03:08:32,878 INFO L130 PetriNetUnfolder]: For 524599/525885 co-relation queries the response was YES. [2021-12-16 03:08:33,120 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185475 conditions, 25209 events. 10838/25209 cut-off events. For 524599/525885 co-relation queries the response was YES. Maximal size of possible extension queue 1985. Compared 284449 event pairs, 2008 based on Foata normal form. 224/24903 useless extension candidates. Maximal degree in co-relation 185401. Up to 16445 conditions per place. [2021-12-16 03:08:33,275 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 599 selfloop transitions, 73 changer transitions 8/789 dead transitions. [2021-12-16 03:08:33,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 789 transitions, 18596 flow [2021-12-16 03:08:33,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:08:33,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:08:33,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 483 transitions. [2021-12-16 03:08:33,277 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8298969072164949 [2021-12-16 03:08:33,277 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 483 transitions. [2021-12-16 03:08:33,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 483 transitions. [2021-12-16 03:08:33,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:33,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 483 transitions. [2021-12-16 03:08:33,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.5) internal successors, (483), 6 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:33,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:33,279 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:33,279 INFO L186 Difference]: Start difference. First operand has 227 places, 683 transitions, 14893 flow. Second operand 6 states and 483 transitions. [2021-12-16 03:08:33,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 789 transitions, 18596 flow [2021-12-16 03:08:35,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 789 transitions, 18301 flow, removed 51 selfloop flow, removed 4 redundant places. [2021-12-16 03:08:35,184 INFO L242 Difference]: Finished difference. Result has 230 places, 697 transitions, 15269 flow [2021-12-16 03:08:35,184 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=14645, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=15269, PETRI_PLACES=230, PETRI_TRANSITIONS=697} [2021-12-16 03:08:35,185 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 144 predicate places. [2021-12-16 03:08:35,185 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 697 transitions, 15269 flow [2021-12-16 03:08:35,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:35,185 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:35,185 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:35,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-16 03:08:35,186 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:08:35,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:35,186 INFO L85 PathProgramCache]: Analyzing trace with hash -543696476, now seen corresponding path program 11 times [2021-12-16 03:08:35,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:35,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993005849] [2021-12-16 03:08:35,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:35,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:35,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:35,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993005849] [2021-12-16 03:08:35,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993005849] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:35,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:35,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:08:35,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28578184] [2021-12-16 03:08:35,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:35,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:08:35,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:35,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:08:35,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:08:35,236 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-16 03:08:35,237 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 697 transitions, 15269 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:35,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:35,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-16 03:08:35,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:40,661 INFO L129 PetriNetUnfolder]: 10774/24919 cut-off events. [2021-12-16 03:08:40,661 INFO L130 PetriNetUnfolder]: For 517020/518480 co-relation queries the response was YES. [2021-12-16 03:08:40,875 INFO L84 FinitePrefix]: Finished finitePrefix Result has 182208 conditions, 24919 events. 10774/24919 cut-off events. For 517020/518480 co-relation queries the response was YES. Maximal size of possible extension queue 1964. Compared 279741 event pairs, 2490 based on Foata normal form. 254/24575 useless extension candidates. Maximal degree in co-relation 182135. Up to 16537 conditions per place. [2021-12-16 03:08:41,063 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 522 selfloop transitions, 60 changer transitions 3/693 dead transitions. [2021-12-16 03:08:41,063 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 693 transitions, 16243 flow [2021-12-16 03:08:41,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:08:41,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:08:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 461 transitions. [2021-12-16 03:08:41,065 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7920962199312714 [2021-12-16 03:08:41,065 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 461 transitions. [2021-12-16 03:08:41,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 461 transitions. [2021-12-16 03:08:41,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:41,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 461 transitions. [2021-12-16 03:08:41,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 76.83333333333333) internal successors, (461), 6 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:41,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:41,067 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:41,067 INFO L186 Difference]: Start difference. First operand has 230 places, 697 transitions, 15269 flow. Second operand 6 states and 461 transitions. [2021-12-16 03:08:41,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 693 transitions, 16243 flow [2021-12-16 03:08:42,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 693 transitions, 15865 flow, removed 45 selfloop flow, removed 10 redundant places. [2021-12-16 03:08:42,646 INFO L242 Difference]: Finished difference. Result has 223 places, 688 transitions, 14774 flow [2021-12-16 03:08:42,647 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=14659, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14774, PETRI_PLACES=223, PETRI_TRANSITIONS=688} [2021-12-16 03:08:42,647 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 137 predicate places. [2021-12-16 03:08:42,648 INFO L470 AbstractCegarLoop]: Abstraction has has 223 places, 688 transitions, 14774 flow [2021-12-16 03:08:42,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:42,648 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:42,648 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:42,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-16 03:08:42,648 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:08:42,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:42,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1290791200, now seen corresponding path program 1 times [2021-12-16 03:08:42,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:42,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721511001] [2021-12-16 03:08:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:42,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:42,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:42,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721511001] [2021-12-16 03:08:42,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721511001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:42,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448085738] [2021-12-16 03:08:42,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:42,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:42,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:42,771 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) [2021-12-16 03:08:42,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 03:08:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:42,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 03:08:42,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:43,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:47,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448085738] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:47,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:47,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 19 [2021-12-16 03:08:47,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963374162] [2021-12-16 03:08:47,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:47,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:08:47,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:47,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:08:47,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=274, Unknown=2, NotChecked=0, Total=342 [2021-12-16 03:08:47,941 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2021-12-16 03:08:47,942 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 688 transitions, 14774 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:47,942 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:47,942 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2021-12-16 03:08:47,942 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:51,604 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-16 03:08:57,926 INFO L129 PetriNetUnfolder]: 11345/30207 cut-off events. [2021-12-16 03:08:57,926 INFO L130 PetriNetUnfolder]: For 599831/602712 co-relation queries the response was YES. [2021-12-16 03:08:58,379 INFO L84 FinitePrefix]: Finished finitePrefix Result has 215576 conditions, 30207 events. 11345/30207 cut-off events. For 599831/602712 co-relation queries the response was YES. Maximal size of possible extension queue 2068. Compared 369136 event pairs, 491 based on Foata normal form. 895/30452 useless extension candidates. Maximal degree in co-relation 215507. Up to 9761 conditions per place. [2021-12-16 03:08:58,563 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 884 selfloop transitions, 317 changer transitions 7/1344 dead transitions. [2021-12-16 03:08:58,563 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 1344 transitions, 32592 flow [2021-12-16 03:08:58,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 03:08:58,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-16 03:08:58,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1081 transitions. [2021-12-16 03:08:58,567 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7429553264604811 [2021-12-16 03:08:58,567 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1081 transitions. [2021-12-16 03:08:58,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1081 transitions. [2021-12-16 03:08:58,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:58,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1081 transitions. [2021-12-16 03:08:58,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 72.06666666666666) internal successors, (1081), 15 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:58,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:58,577 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:58,577 INFO L186 Difference]: Start difference. First operand has 223 places, 688 transitions, 14774 flow. Second operand 15 states and 1081 transitions. [2021-12-16 03:08:58,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 1344 transitions, 32592 flow [2021-12-16 03:09:00,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 1344 transitions, 32375 flow, removed 5 selfloop flow, removed 8 redundant places. [2021-12-16 03:09:00,365 INFO L242 Difference]: Finished difference. Result has 232 places, 871 transitions, 19097 flow [2021-12-16 03:09:00,366 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=14600, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=19097, PETRI_PLACES=232, PETRI_TRANSITIONS=871} [2021-12-16 03:09:00,366 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 146 predicate places. [2021-12-16 03:09:00,366 INFO L470 AbstractCegarLoop]: Abstraction has has 232 places, 871 transitions, 19097 flow [2021-12-16 03:09:00,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:00,367 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:00,367 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:09:00,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-16 03:09:00,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:09:00,568 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:09:00,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:00,570 INFO L85 PathProgramCache]: Analyzing trace with hash 44821908, now seen corresponding path program 2 times [2021-12-16 03:09:00,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:00,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177766767] [2021-12-16 03:09:00,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:00,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:00,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:00,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177766767] [2021-12-16 03:09:00,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177766767] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:09:00,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903556055] [2021-12-16 03:09:00,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:09:00,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:09:00,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:09:00,748 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:09:00,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 03:09:00,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:09:00,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:09:00,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-16 03:09:00,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:09:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:01,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:09:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:01,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903556055] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:09:01,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:09:01,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2021-12-16 03:09:01,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314801097] [2021-12-16 03:09:01,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:09:01,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 03:09:01,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:01,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 03:09:01,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-12-16 03:09:01,765 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2021-12-16 03:09:01,766 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 871 transitions, 19097 flow. Second operand has 17 states, 17 states have (on average 65.70588235294117) internal successors, (1117), 17 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:01,766 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:01,766 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2021-12-16 03:09:01,766 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand