./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/bench-exp2x9.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/bench-exp2x9.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 d6a1dd92aa2998cfb1326128fd549d301e029b328accb048c4d2ec692e416e63 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:46:02,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:46:02,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:46:02,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:46:02,749 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:46:02,750 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:46:02,751 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:46:02,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:46:02,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:46:02,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:46:02,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:46:02,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:46:02,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:46:02,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:46:02,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:46:02,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:46:02,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:46:02,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:46:02,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:46:02,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:46:02,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:46:02,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:46:02,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:46:02,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:46:02,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:46:02,775 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:46:02,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:46:02,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:46:02,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:46:02,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:46:02,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:46:02,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:46:02,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:46:02,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:46:02,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:46:02,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:46:02,785 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:46:02,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:46:02,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:46:02,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:46:02,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:46:02,788 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:46:02,812 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:46:02,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:46:02,813 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:46:02,813 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:46:02,814 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:46:02,814 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:46:02,815 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:46:02,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:46:02,815 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:46:02,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:46:02,816 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:46:02,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:46:02,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:46:02,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:46:02,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:46:02,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:46:02,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:46:02,817 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:46:02,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:46:02,818 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:46:02,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:46:02,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:46:02,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:46:02,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:46:02,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:46:02,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:46:02,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:46:02,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:46:02,820 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:46:02,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:46:02,821 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:46:02,821 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:46:02,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:46:02,821 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:46:02,821 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6a1dd92aa2998cfb1326128fd549d301e029b328accb048c4d2ec692e416e63 [2021-12-14 16:46:03,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:46:03,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:46:03,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:46:03,082 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:46:03,082 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:46:03,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp2x9.wvr.c [2021-12-14 16:46:03,168 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df591974b/0e45a132f4bd456b9bb6bd7fdbb239d2/FLAG5779f1310 [2021-12-14 16:46:03,487 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:46:03,488 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x9.wvr.c [2021-12-14 16:46:03,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df591974b/0e45a132f4bd456b9bb6bd7fdbb239d2/FLAG5779f1310 [2021-12-14 16:46:03,915 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df591974b/0e45a132f4bd456b9bb6bd7fdbb239d2 [2021-12-14 16:46:03,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:46:03,918 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:46:03,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:46:03,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:46:03,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:46:03,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:46:03" (1/1) ... [2021-12-14 16:46:03,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d40849a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:46:03, skipping insertion in model container [2021-12-14 16:46:03,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:46:03" (1/1) ... [2021-12-14 16:46:03,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:46:03,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:46:04,081 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/bench-exp2x9.wvr.c[2669,2682] [2021-12-14 16:46:04,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:46:04,092 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:46:04,118 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/bench-exp2x9.wvr.c[2669,2682] [2021-12-14 16:46:04,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:46:04,127 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:46:04,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:46:04 WrapperNode [2021-12-14 16:46:04,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:46:04,129 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:46:04,129 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:46:04,129 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:46:04,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:46:04" (1/1) ... [2021-12-14 16:46:04,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:46:04" (1/1) ... [2021-12-14 16:46:04,167 INFO L137 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2021-12-14 16:46:04,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:46:04,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:46:04,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:46:04,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:46:04,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:46:04" (1/1) ... [2021-12-14 16:46:04,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:46:04" (1/1) ... [2021-12-14 16:46:04,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:46:04" (1/1) ... [2021-12-14 16:46:04,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:46:04" (1/1) ... [2021-12-14 16:46:04,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:46:04" (1/1) ... [2021-12-14 16:46:04,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:46:04" (1/1) ... [2021-12-14 16:46:04,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:46:04" (1/1) ... [2021-12-14 16:46:04,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:46:04,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:46:04,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:46:04,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:46:04,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:46:04" (1/1) ... [2021-12-14 16:46:04,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:46:04,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:46:04,230 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) [2021-12-14 16:46:04,245 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 [2021-12-14 16:46:04,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:46:04,258 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-14 16:46:04,258 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-14 16:46:04,259 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-14 16:46:04,259 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-14 16:46:04,259 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-14 16:46:04,259 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-14 16:46:04,259 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-12-14 16:46:04,259 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-12-14 16:46:04,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:46:04,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 16:46:04,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 16:46:04,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:46:04,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:46:04,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 16:46:04,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 16:46:04,261 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-14 16:46:04,334 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:46:04,336 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:46:04,515 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:46:04,521 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:46:04,521 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-14 16:46:04,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:46:04 BoogieIcfgContainer [2021-12-14 16:46:04,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:46:04,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:46:04,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:46:04,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:46:04,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:46:03" (1/3) ... [2021-12-14 16:46:04,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f64ff74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:46:04, skipping insertion in model container [2021-12-14 16:46:04,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:46:04" (2/3) ... [2021-12-14 16:46:04,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f64ff74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:46:04, skipping insertion in model container [2021-12-14 16:46:04,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:46:04" (3/3) ... [2021-12-14 16:46:04,535 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp2x9.wvr.c [2021-12-14 16:46:04,539 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-14 16:46:04,540 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:46:04,540 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 16:46:04,540 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-14 16:46:04,569 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,569 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,569 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,570 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,571 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,571 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,571 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,571 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,572 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,572 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,572 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,572 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,574 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,575 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,577 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,577 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,578 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,578 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,578 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,578 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:46:04,584 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-12-14 16:46:04,615 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:46:04,624 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 [2021-12-14 16:46:04,626 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-12-14 16:46:04,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 152 places, 149 transitions, 330 flow [2021-12-14 16:46:04,710 INFO L129 PetriNetUnfolder]: 10/145 cut-off events. [2021-12-14 16:46:04,711 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-14 16:46:04,716 INFO L84 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 145 events. 10/145 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 131 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2021-12-14 16:46:04,716 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 149 transitions, 330 flow [2021-12-14 16:46:04,723 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 132 transitions, 288 flow [2021-12-14 16:46:04,752 INFO L129 PetriNetUnfolder]: 10/131 cut-off events. [2021-12-14 16:46:04,755 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-14 16:46:04,755 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:46:04,756 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:46:04,756 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:46:04,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:46:04,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1414166451, now seen corresponding path program 1 times [2021-12-14 16:46:04,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:46:04,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180412082] [2021-12-14 16:46:04,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:04,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:46:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:05,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:05,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:46:05,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180412082] [2021-12-14 16:46:05,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180412082] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:46:05,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:46:05,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:46:05,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503716236] [2021-12-14 16:46:05,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:46:05,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 16:46:05,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:46:05,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 16:46:05,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 16:46:05,042 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 149 [2021-12-14 16:46:05,047 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 132 transitions, 288 flow. Second operand has 2 states, 2 states have (on average 139.0) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:05,048 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:46:05,048 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 149 [2021-12-14 16:46:05,049 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:46:05,081 INFO L129 PetriNetUnfolder]: 4/126 cut-off events. [2021-12-14 16:46:05,082 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-12-14 16:46:05,084 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 126 events. 4/126 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 117 event pairs, 0 based on Foata normal form. 18/138 useless extension candidates. Maximal degree in co-relation 101. Up to 9 conditions per place. [2021-12-14 16:46:05,086 INFO L132 encePairwiseOnDemand]: 143/149 looper letters, 8 selfloop transitions, 0 changer transitions 2/126 dead transitions. [2021-12-14 16:46:05,087 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 126 transitions, 292 flow [2021-12-14 16:46:05,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 16:46:05,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-14 16:46:05,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 282 transitions. [2021-12-14 16:46:05,097 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9463087248322147 [2021-12-14 16:46:05,098 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 282 transitions. [2021-12-14 16:46:05,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 282 transitions. [2021-12-14 16:46:05,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:46:05,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 282 transitions. [2021-12-14 16:46:05,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 141.0) internal successors, (282), 2 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:05,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:05,121 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:05,124 INFO L186 Difference]: Start difference. First operand has 135 places, 132 transitions, 288 flow. Second operand 2 states and 282 transitions. [2021-12-14 16:46:05,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 126 transitions, 292 flow [2021-12-14 16:46:05,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 126 transitions, 276 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-12-14 16:46:05,132 INFO L242 Difference]: Finished difference. Result has 128 places, 124 transitions, 256 flow [2021-12-14 16:46:05,134 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=256, PETRI_PLACES=128, PETRI_TRANSITIONS=124} [2021-12-14 16:46:05,138 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, -7 predicate places. [2021-12-14 16:46:05,139 INFO L470 AbstractCegarLoop]: Abstraction has has 128 places, 124 transitions, 256 flow [2021-12-14 16:46:05,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 139.0) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:05,139 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:46:05,143 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:46:05,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:46:05,144 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:46:05,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:46:05,144 INFO L85 PathProgramCache]: Analyzing trace with hash 735830245, now seen corresponding path program 1 times [2021-12-14 16:46:05,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:46:05,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530285383] [2021-12-14 16:46:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:05,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:46:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:05,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:05,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:46:05,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530285383] [2021-12-14 16:46:05,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530285383] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:46:05,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:46:05,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:46:05,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757249836] [2021-12-14 16:46:05,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:46:05,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:46:05,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:46:05,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:46:05,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:46:05,438 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 149 [2021-12-14 16:46:05,438 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 124 transitions, 256 flow. Second operand has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:05,438 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:46:05,438 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 149 [2021-12-14 16:46:05,438 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:46:08,335 INFO L129 PetriNetUnfolder]: 24847/33594 cut-off events. [2021-12-14 16:46:08,335 INFO L130 PetriNetUnfolder]: For 860/935 co-relation queries the response was YES. [2021-12-14 16:46:08,417 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67682 conditions, 33594 events. 24847/33594 cut-off events. For 860/935 co-relation queries the response was YES. Maximal size of possible extension queue 1124. Compared 189881 event pairs, 11708 based on Foata normal form. 1/29807 useless extension candidates. Maximal degree in co-relation 67679. Up to 32788 conditions per place. [2021-12-14 16:46:08,752 INFO L132 encePairwiseOnDemand]: 139/149 looper letters, 71 selfloop transitions, 7 changer transitions 4/146 dead transitions. [2021-12-14 16:46:08,753 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 146 transitions, 471 flow [2021-12-14 16:46:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:46:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-14 16:46:08,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 643 transitions. [2021-12-14 16:46:08,758 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6164908916586769 [2021-12-14 16:46:08,758 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 643 transitions. [2021-12-14 16:46:08,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 643 transitions. [2021-12-14 16:46:08,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:46:08,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 643 transitions. [2021-12-14 16:46:08,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 91.85714285714286) internal successors, (643), 7 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:08,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:08,763 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:08,763 INFO L186 Difference]: Start difference. First operand has 128 places, 124 transitions, 256 flow. Second operand 7 states and 643 transitions. [2021-12-14 16:46:08,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 146 transitions, 471 flow [2021-12-14 16:46:08,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 146 transitions, 471 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-14 16:46:08,782 INFO L242 Difference]: Finished difference. Result has 135 places, 128 transitions, 297 flow [2021-12-14 16:46:08,782 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=297, PETRI_PLACES=135, PETRI_TRANSITIONS=128} [2021-12-14 16:46:08,783 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 0 predicate places. [2021-12-14 16:46:08,783 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 128 transitions, 297 flow [2021-12-14 16:46:08,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:08,784 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:46:08,784 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:46:08,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:46:08,784 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:46:08,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:46:08,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1435785726, now seen corresponding path program 1 times [2021-12-14 16:46:08,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:46:08,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827462353] [2021-12-14 16:46:08,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:08,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:46:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:09,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:46:09,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827462353] [2021-12-14 16:46:09,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827462353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:46:09,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:46:09,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:46:09,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500592856] [2021-12-14 16:46:09,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:46:09,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:46:09,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:46:09,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:46:09,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:46:09,039 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 149 [2021-12-14 16:46:09,039 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 128 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:09,040 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:46:09,040 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 149 [2021-12-14 16:46:09,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:46:10,974 INFO L129 PetriNetUnfolder]: 24821/33501 cut-off events. [2021-12-14 16:46:10,975 INFO L130 PetriNetUnfolder]: For 3786/3861 co-relation queries the response was YES. [2021-12-14 16:46:11,065 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71364 conditions, 33501 events. 24821/33501 cut-off events. For 3786/3861 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 189180 event pairs, 11557 based on Foata normal form. 0/29743 useless extension candidates. Maximal degree in co-relation 71357. Up to 32790 conditions per place. [2021-12-14 16:46:11,322 INFO L132 encePairwiseOnDemand]: 138/149 looper letters, 81 selfloop transitions, 11 changer transitions 1/155 dead transitions. [2021-12-14 16:46:11,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 155 transitions, 554 flow [2021-12-14 16:46:11,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:46:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-14 16:46:11,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 563 transitions. [2021-12-14 16:46:11,325 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6297539149888143 [2021-12-14 16:46:11,325 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 563 transitions. [2021-12-14 16:46:11,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 563 transitions. [2021-12-14 16:46:11,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:46:11,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 563 transitions. [2021-12-14 16:46:11,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.83333333333333) internal successors, (563), 6 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:11,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:11,329 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:11,329 INFO L186 Difference]: Start difference. First operand has 135 places, 128 transitions, 297 flow. Second operand 6 states and 563 transitions. [2021-12-14 16:46:11,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 155 transitions, 554 flow [2021-12-14 16:46:11,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 155 transitions, 539 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-12-14 16:46:11,336 INFO L242 Difference]: Finished difference. Result has 135 places, 132 transitions, 337 flow [2021-12-14 16:46:11,337 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=135, PETRI_TRANSITIONS=132} [2021-12-14 16:46:11,338 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 0 predicate places. [2021-12-14 16:46:11,339 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 132 transitions, 337 flow [2021-12-14 16:46:11,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:11,339 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:46:11,339 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:46:11,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:46:11,340 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:46:11,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:46:11,341 INFO L85 PathProgramCache]: Analyzing trace with hash -678323914, now seen corresponding path program 2 times [2021-12-14 16:46:11,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:46:11,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676061952] [2021-12-14 16:46:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:11,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:46:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:11,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:46:11,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676061952] [2021-12-14 16:46:11,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676061952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:46:11,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:46:11,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:46:11,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625478589] [2021-12-14 16:46:11,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:46:11,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:46:11,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:46:11,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:46:11,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:46:11,588 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 149 [2021-12-14 16:46:11,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 132 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:11,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:46:11,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 149 [2021-12-14 16:46:11,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:46:13,484 INFO L129 PetriNetUnfolder]: 24709/33724 cut-off events. [2021-12-14 16:46:13,484 INFO L130 PetriNetUnfolder]: For 7516/7601 co-relation queries the response was YES. [2021-12-14 16:46:13,580 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75024 conditions, 33724 events. 24709/33724 cut-off events. For 7516/7601 co-relation queries the response was YES. Maximal size of possible extension queue 1143. Compared 194599 event pairs, 12405 based on Foata normal form. 37/31819 useless extension candidates. Maximal degree in co-relation 75017. Up to 32735 conditions per place. [2021-12-14 16:46:13,712 INFO L132 encePairwiseOnDemand]: 138/149 looper letters, 82 selfloop transitions, 13 changer transitions 1/158 dead transitions. [2021-12-14 16:46:13,713 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 158 transitions, 613 flow [2021-12-14 16:46:13,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:46:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-14 16:46:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 562 transitions. [2021-12-14 16:46:13,714 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6286353467561522 [2021-12-14 16:46:13,714 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 562 transitions. [2021-12-14 16:46:13,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 562 transitions. [2021-12-14 16:46:13,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:46:13,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 562 transitions. [2021-12-14 16:46:13,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.66666666666667) internal successors, (562), 6 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) [2021-12-14 16:46:13,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:13,719 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:13,719 INFO L186 Difference]: Start difference. First operand has 135 places, 132 transitions, 337 flow. Second operand 6 states and 562 transitions. [2021-12-14 16:46:13,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 158 transitions, 613 flow [2021-12-14 16:46:13,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 158 transitions, 591 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-14 16:46:13,725 INFO L242 Difference]: Finished difference. Result has 138 places, 136 transitions, 384 flow [2021-12-14 16:46:13,725 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=384, PETRI_PLACES=138, PETRI_TRANSITIONS=136} [2021-12-14 16:46:13,726 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 3 predicate places. [2021-12-14 16:46:13,726 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 136 transitions, 384 flow [2021-12-14 16:46:13,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:13,727 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:46:13,727 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:46:13,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:46:13,727 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:46:13,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:46:13,728 INFO L85 PathProgramCache]: Analyzing trace with hash 34940876, now seen corresponding path program 3 times [2021-12-14 16:46:13,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:46:13,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731565580] [2021-12-14 16:46:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:13,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:46:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:14,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:14,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:46:14,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731565580] [2021-12-14 16:46:14,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731565580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:46:14,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:46:14,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:46:14,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432063198] [2021-12-14 16:46:14,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:46:14,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:46:14,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:46:14,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:46:14,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:46:14,112 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 149 [2021-12-14 16:46:14,113 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 136 transitions, 384 flow. Second operand has 7 states, 7 states have (on average 83.42857142857143) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:14,113 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:46:14,113 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 149 [2021-12-14 16:46:14,113 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:46:16,409 INFO L129 PetriNetUnfolder]: 27400/37091 cut-off events. [2021-12-14 16:46:16,409 INFO L130 PetriNetUnfolder]: For 14775/14847 co-relation queries the response was YES. [2021-12-14 16:46:16,519 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85484 conditions, 37091 events. 27400/37091 cut-off events. For 14775/14847 co-relation queries the response was YES. Maximal size of possible extension queue 1301. Compared 215849 event pairs, 8744 based on Foata normal form. 902/35852 useless extension candidates. Maximal degree in co-relation 85475. Up to 29078 conditions per place. [2021-12-14 16:46:16,653 INFO L132 encePairwiseOnDemand]: 139/149 looper letters, 111 selfloop transitions, 15 changer transitions 1/189 dead transitions. [2021-12-14 16:46:16,654 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 189 transitions, 783 flow [2021-12-14 16:46:16,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:46:16,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-14 16:46:16,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 670 transitions. [2021-12-14 16:46:16,657 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6423777564717162 [2021-12-14 16:46:16,657 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 670 transitions. [2021-12-14 16:46:16,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 670 transitions. [2021-12-14 16:46:16,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:46:16,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 670 transitions. [2021-12-14 16:46:16,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 95.71428571428571) internal successors, (670), 7 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:16,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:16,662 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:16,662 INFO L186 Difference]: Start difference. First operand has 138 places, 136 transitions, 384 flow. Second operand 7 states and 670 transitions. [2021-12-14 16:46:16,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 189 transitions, 783 flow [2021-12-14 16:46:16,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 189 transitions, 760 flow, removed 5 selfloop flow, removed 3 redundant places. [2021-12-14 16:46:16,672 INFO L242 Difference]: Finished difference. Result has 143 places, 137 transitions, 418 flow [2021-12-14 16:46:16,673 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=418, PETRI_PLACES=143, PETRI_TRANSITIONS=137} [2021-12-14 16:46:16,675 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 8 predicate places. [2021-12-14 16:46:16,675 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 137 transitions, 418 flow [2021-12-14 16:46:16,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.42857142857143) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:16,676 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:46:16,676 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:46:16,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:46:16,676 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:46:16,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:46:16,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1082751602, now seen corresponding path program 1 times [2021-12-14 16:46:16,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:46:16,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857321763] [2021-12-14 16:46:16,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:16,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:46:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:16,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:16,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:46:16,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857321763] [2021-12-14 16:46:16,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857321763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:46:16,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:46:16,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:46:16,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723397867] [2021-12-14 16:46:16,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:46:16,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:46:16,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:46:16,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:46:16,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:46:17,014 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 149 [2021-12-14 16:46:17,015 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 137 transitions, 418 flow. Second operand has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:17,015 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:46:17,015 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 149 [2021-12-14 16:46:17,015 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:46:19,432 INFO L129 PetriNetUnfolder]: 27379/39351 cut-off events. [2021-12-14 16:46:19,432 INFO L130 PetriNetUnfolder]: For 21988/22051 co-relation queries the response was YES. [2021-12-14 16:46:19,543 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91342 conditions, 39351 events. 27379/39351 cut-off events. For 21988/22051 co-relation queries the response was YES. Maximal size of possible extension queue 1523. Compared 259709 event pairs, 14648 based on Foata normal form. 0/37227 useless extension candidates. Maximal degree in co-relation 91332. Up to 36326 conditions per place. [2021-12-14 16:46:19,677 INFO L132 encePairwiseOnDemand]: 138/149 looper letters, 89 selfloop transitions, 21 changer transitions 1/173 dead transitions. [2021-12-14 16:46:19,677 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 173 transitions, 838 flow [2021-12-14 16:46:19,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:46:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-14 16:46:19,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 564 transitions. [2021-12-14 16:46:19,679 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6308724832214765 [2021-12-14 16:46:19,679 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 564 transitions. [2021-12-14 16:46:19,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 564 transitions. [2021-12-14 16:46:19,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:46:19,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 564 transitions. [2021-12-14 16:46:19,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 94.0) internal successors, (564), 6 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:19,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:19,682 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:19,682 INFO L186 Difference]: Start difference. First operand has 143 places, 137 transitions, 418 flow. Second operand 6 states and 564 transitions. [2021-12-14 16:46:19,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 173 transitions, 838 flow [2021-12-14 16:46:19,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 173 transitions, 809 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-14 16:46:19,691 INFO L242 Difference]: Finished difference. Result has 146 places, 147 transitions, 548 flow [2021-12-14 16:46:19,692 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=548, PETRI_PLACES=146, PETRI_TRANSITIONS=147} [2021-12-14 16:46:19,692 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 11 predicate places. [2021-12-14 16:46:19,692 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 147 transitions, 548 flow [2021-12-14 16:46:19,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:19,693 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:46:19,693 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:46:19,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:46:19,693 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:46:19,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:46:19,693 INFO L85 PathProgramCache]: Analyzing trace with hash 267422604, now seen corresponding path program 2 times [2021-12-14 16:46:19,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:46:19,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253614916] [2021-12-14 16:46:19,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:19,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:46:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:19,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:46:19,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253614916] [2021-12-14 16:46:19,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253614916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:46:19,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:46:19,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:46:19,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276048965] [2021-12-14 16:46:19,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:46:19,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:46:19,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:46:19,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:46:19,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:46:19,841 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 149 [2021-12-14 16:46:19,841 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 147 transitions, 548 flow. Second operand has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:19,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:46:19,841 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 149 [2021-12-14 16:46:19,842 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:46:22,445 INFO L129 PetriNetUnfolder]: 27326/39130 cut-off events. [2021-12-14 16:46:22,445 INFO L130 PetriNetUnfolder]: For 24540/24603 co-relation queries the response was YES. [2021-12-14 16:46:22,581 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94991 conditions, 39130 events. 27326/39130 cut-off events. For 24540/24603 co-relation queries the response was YES. Maximal size of possible extension queue 1511. Compared 253803 event pairs, 17526 based on Foata normal form. 20/38872 useless extension candidates. Maximal degree in co-relation 94978. Up to 36297 conditions per place. [2021-12-14 16:46:22,740 INFO L132 encePairwiseOnDemand]: 138/149 looper letters, 90 selfloop transitions, 17 changer transitions 2/171 dead transitions. [2021-12-14 16:46:22,740 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 171 transitions, 844 flow [2021-12-14 16:46:22,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:46:22,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-14 16:46:22,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 562 transitions. [2021-12-14 16:46:22,742 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6286353467561522 [2021-12-14 16:46:22,742 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 562 transitions. [2021-12-14 16:46:22,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 562 transitions. [2021-12-14 16:46:22,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:46:22,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 562 transitions. [2021-12-14 16:46:22,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.66666666666667) internal successors, (562), 6 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) [2021-12-14 16:46:22,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:22,745 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:22,745 INFO L186 Difference]: Start difference. First operand has 146 places, 147 transitions, 548 flow. Second operand 6 states and 562 transitions. [2021-12-14 16:46:22,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 171 transitions, 844 flow [2021-12-14 16:46:22,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 171 transitions, 827 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-14 16:46:22,757 INFO L242 Difference]: Finished difference. Result has 150 places, 145 transitions, 550 flow [2021-12-14 16:46:22,757 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=550, PETRI_PLACES=150, PETRI_TRANSITIONS=145} [2021-12-14 16:46:22,757 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 15 predicate places. [2021-12-14 16:46:22,758 INFO L470 AbstractCegarLoop]: Abstraction has has 150 places, 145 transitions, 550 flow [2021-12-14 16:46:22,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:22,758 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:46:22,758 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:46:22,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:46:22,759 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:46:22,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:46:22,759 INFO L85 PathProgramCache]: Analyzing trace with hash 620717378, now seen corresponding path program 1 times [2021-12-14 16:46:22,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:46:22,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274773602] [2021-12-14 16:46:22,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:22,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:46:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:22,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:46:22,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274773602] [2021-12-14 16:46:22,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274773602] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:46:22,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074887008] [2021-12-14 16:46:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:22,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:46:22,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:46:22,917 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) [2021-12-14 16:46:22,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:46:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:23,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 16:46:23,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:46:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:23,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:46:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:24,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074887008] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:46:24,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:46:24,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-12-14 16:46:24,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253225689] [2021-12-14 16:46:24,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:46:24,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:46:24,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:46:24,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:46:24,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:46:24,331 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 149 [2021-12-14 16:46:24,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 145 transitions, 550 flow. Second operand has 14 states, 14 states have (on average 83.35714285714286) internal successors, (1167), 14 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:24,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:46:24,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 149 [2021-12-14 16:46:24,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:46:28,368 INFO L129 PetriNetUnfolder]: 38104/55867 cut-off events. [2021-12-14 16:46:28,368 INFO L130 PetriNetUnfolder]: For 40938/40979 co-relation queries the response was YES. [2021-12-14 16:46:28,593 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140707 conditions, 55867 events. 38104/55867 cut-off events. For 40938/40979 co-relation queries the response was YES. Maximal size of possible extension queue 1883. Compared 389838 event pairs, 2933 based on Foata normal form. 1114/56792 useless extension candidates. Maximal degree in co-relation 140692. Up to 30380 conditions per place. [2021-12-14 16:46:28,803 INFO L132 encePairwiseOnDemand]: 134/149 looper letters, 250 selfloop transitions, 32 changer transitions 2/346 dead transitions. [2021-12-14 16:46:28,803 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 346 transitions, 1826 flow [2021-12-14 16:46:28,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:46:28,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:46:28,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1357 transitions. [2021-12-14 16:46:28,805 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6505273250239694 [2021-12-14 16:46:28,806 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1357 transitions. [2021-12-14 16:46:28,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1357 transitions. [2021-12-14 16:46:28,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:46:28,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1357 transitions. [2021-12-14 16:46:28,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 96.92857142857143) internal successors, (1357), 14 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:28,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 149.0) internal successors, (2235), 15 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:28,812 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 149.0) internal successors, (2235), 15 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:28,812 INFO L186 Difference]: Start difference. First operand has 150 places, 145 transitions, 550 flow. Second operand 14 states and 1357 transitions. [2021-12-14 16:46:28,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 346 transitions, 1826 flow [2021-12-14 16:46:28,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 346 transitions, 1785 flow, removed 12 selfloop flow, removed 3 redundant places. [2021-12-14 16:46:28,848 INFO L242 Difference]: Finished difference. Result has 167 places, 157 transitions, 700 flow [2021-12-14 16:46:28,848 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=700, PETRI_PLACES=167, PETRI_TRANSITIONS=157} [2021-12-14 16:46:28,848 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 32 predicate places. [2021-12-14 16:46:28,848 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 157 transitions, 700 flow [2021-12-14 16:46:28,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 83.35714285714286) internal successors, (1167), 14 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:28,849 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:46:28,849 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:46:28,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:46:29,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:46:29,055 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:46:29,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:46:29,056 INFO L85 PathProgramCache]: Analyzing trace with hash 440214246, now seen corresponding path program 3 times [2021-12-14 16:46:29,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:46:29,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42484115] [2021-12-14 16:46:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:29,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:46:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:29,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:46:29,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42484115] [2021-12-14 16:46:29,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42484115] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:46:29,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:46:29,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:46:29,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557551801] [2021-12-14 16:46:29,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:46:29,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:46:29,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:46:29,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:46:29,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:46:29,217 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 149 [2021-12-14 16:46:29,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 157 transitions, 700 flow. Second operand has 7 states, 7 states have (on average 83.42857142857143) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:29,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:46:29,217 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 149 [2021-12-14 16:46:29,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:46:33,927 INFO L129 PetriNetUnfolder]: 41124/59664 cut-off events. [2021-12-14 16:46:33,927 INFO L130 PetriNetUnfolder]: For 79828/79903 co-relation queries the response was YES. [2021-12-14 16:46:34,234 INFO L84 FinitePrefix]: Finished finitePrefix Result has 169767 conditions, 59664 events. 41124/59664 cut-off events. For 79828/79903 co-relation queries the response was YES. Maximal size of possible extension queue 1978. Compared 410802 event pairs, 23951 based on Foata normal form. 909/60284 useless extension candidates. Maximal degree in co-relation 169746. Up to 44500 conditions per place. [2021-12-14 16:46:34,463 INFO L132 encePairwiseOnDemand]: 139/149 looper letters, 133 selfloop transitions, 21 changer transitions 2/218 dead transitions. [2021-12-14 16:46:34,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 218 transitions, 1289 flow [2021-12-14 16:46:34,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:46:34,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-14 16:46:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 670 transitions. [2021-12-14 16:46:34,465 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6423777564717162 [2021-12-14 16:46:34,465 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 670 transitions. [2021-12-14 16:46:34,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 670 transitions. [2021-12-14 16:46:34,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:46:34,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 670 transitions. [2021-12-14 16:46:34,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 95.71428571428571) internal successors, (670), 7 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:34,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:34,468 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:34,469 INFO L186 Difference]: Start difference. First operand has 167 places, 157 transitions, 700 flow. Second operand 7 states and 670 transitions. [2021-12-14 16:46:34,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 218 transitions, 1289 flow [2021-12-14 16:46:34,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 218 transitions, 1258 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-12-14 16:46:34,916 INFO L242 Difference]: Finished difference. Result has 170 places, 158 transitions, 744 flow [2021-12-14 16:46:34,916 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=744, PETRI_PLACES=170, PETRI_TRANSITIONS=158} [2021-12-14 16:46:34,916 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 35 predicate places. [2021-12-14 16:46:34,917 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 158 transitions, 744 flow [2021-12-14 16:46:34,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.42857142857143) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:34,917 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:46:34,917 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:46:34,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:46:34,917 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:46:34,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:46:34,918 INFO L85 PathProgramCache]: Analyzing trace with hash -387427532, now seen corresponding path program 1 times [2021-12-14 16:46:34,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:46:34,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731246108] [2021-12-14 16:46:34,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:34,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:46:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:35,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:46:35,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731246108] [2021-12-14 16:46:35,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731246108] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:46:35,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:46:35,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:46:35,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328733302] [2021-12-14 16:46:35,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:46:35,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:46:35,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:46:35,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:46:35,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:46:35,044 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 149 [2021-12-14 16:46:35,044 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 158 transitions, 744 flow. Second operand has 7 states, 7 states have (on average 83.42857142857143) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:35,044 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:46:35,045 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 149 [2021-12-14 16:46:35,045 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand