./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/bench-exp2x4.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-exp2x4.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 f3514ef3a93910f9ac9453b24d3813c22e07d2a41de38e0bc0d58abd31257770 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:45:49,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:45:49,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:45:49,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:45:49,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:45:49,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:45:49,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:45:49,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:45:49,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:45:49,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:45:49,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:45:49,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:45:49,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:45:49,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:45:49,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:45:49,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:45:49,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:45:49,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:45:49,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:45:49,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:45:49,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:45:49,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:45:49,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:45:49,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:45:49,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:45:49,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:45:49,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:45:49,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:45:49,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:45:49,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:45:49,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:45:49,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:45:49,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:45:49,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:45:49,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:45:49,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:45:49,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:45:49,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:45:49,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:45:49,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:45:49,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:45:49,708 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:45:49,732 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:45:49,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:45:49,734 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:45:49,734 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:45:49,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:45:49,735 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:45:49,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:45:49,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:45:49,735 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:45:49,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:45:49,736 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:45:49,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:45:49,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:45:49,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:45:49,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:45:49,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:45:49,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:45:49,737 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:45:49,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:45:49,737 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:45:49,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:45:49,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:45:49,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:45:49,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:45:49,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:45:49,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:45:49,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:45:49,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:45:49,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:45:49,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:45:49,740 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:45:49,740 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:45:49,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:45:49,741 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:45:49,741 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3514ef3a93910f9ac9453b24d3813c22e07d2a41de38e0bc0d58abd31257770 [2021-12-14 16:45:49,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:45:49,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:45:49,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:45:49,986 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:45:49,986 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:45:49,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp2x4.wvr.c [2021-12-14 16:45:50,051 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d22c598a/3edf06072dd144e8a94799805aefe2e7/FLAGb324c7dce [2021-12-14 16:45:50,481 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:45:50,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x4.wvr.c [2021-12-14 16:45:50,491 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d22c598a/3edf06072dd144e8a94799805aefe2e7/FLAGb324c7dce [2021-12-14 16:45:50,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d22c598a/3edf06072dd144e8a94799805aefe2e7 [2021-12-14 16:45:50,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:45:50,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:45:50,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:45:50,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:45:50,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:45:50,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:45:50" (1/1) ... [2021-12-14 16:45:50,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26698cb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:50, skipping insertion in model container [2021-12-14 16:45:50,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:45:50" (1/1) ... [2021-12-14 16:45:50,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:45:50,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:45:50,720 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-exp2x4.wvr.c[2309,2322] [2021-12-14 16:45:50,727 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:45:50,733 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:45:50,765 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-exp2x4.wvr.c[2309,2322] [2021-12-14 16:45:50,767 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:45:50,776 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:45:50,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:50 WrapperNode [2021-12-14 16:45:50,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:45:50,778 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:45:50,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:45:50,779 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:45:50,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:50" (1/1) ... [2021-12-14 16:45:50,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:50" (1/1) ... [2021-12-14 16:45:50,816 INFO L137 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2021-12-14 16:45:50,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:45:50,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:45:50,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:45:50,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:45:50,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:50" (1/1) ... [2021-12-14 16:45:50,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:50" (1/1) ... [2021-12-14 16:45:50,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:50" (1/1) ... [2021-12-14 16:45:50,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:50" (1/1) ... [2021-12-14 16:45:50,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:50" (1/1) ... [2021-12-14 16:45:50,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:50" (1/1) ... [2021-12-14 16:45:50,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:50" (1/1) ... [2021-12-14 16:45:50,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:45:50,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:45:50,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:45:50,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:45:50,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:50" (1/1) ... [2021-12-14 16:45:50,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:45:50,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:45:50,891 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 16:45:50,909 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 16:45:50,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:45:50,919 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-14 16:45:50,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-14 16:45:50,919 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-14 16:45:50,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-14 16:45:50,919 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-14 16:45:50,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-14 16:45:50,920 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-12-14 16:45:50,920 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-12-14 16:45:50,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:45:50,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 16:45:50,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 16:45:50,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:45:50,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:45:50,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 16:45:50,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 16:45:50,922 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 16:45:50,994 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:45:50,995 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:45:51,209 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:45:51,217 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:45:51,219 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-14 16:45:51,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:45:51 BoogieIcfgContainer [2021-12-14 16:45:51,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:45:51,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:45:51,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:45:51,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:45:51,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:45:50" (1/3) ... [2021-12-14 16:45:51,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e65e9d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:45:51, skipping insertion in model container [2021-12-14 16:45:51,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:50" (2/3) ... [2021-12-14 16:45:51,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e65e9d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:45:51, skipping insertion in model container [2021-12-14 16:45:51,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:45:51" (3/3) ... [2021-12-14 16:45:51,230 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp2x4.wvr.c [2021-12-14 16:45:51,234 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-14 16:45:51,234 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:45:51,235 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 16:45:51,235 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-14 16:45:51,281 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,281 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,281 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,282 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,282 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,282 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,283 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,283 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,286 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,286 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,286 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,286 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,287 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,287 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,288 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,288 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,294 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,296 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,299 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,299 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,300 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,300 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,302 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,302 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:51,311 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-12-14 16:45:51,352 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:45:51,359 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 16:45:51,359 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-12-14 16:45:51,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 132 places, 129 transitions, 290 flow [2021-12-14 16:45:51,428 INFO L129 PetriNetUnfolder]: 10/125 cut-off events. [2021-12-14 16:45:51,429 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-14 16:45:51,434 INFO L84 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 125 events. 10/125 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 64 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2021-12-14 16:45:51,434 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 129 transitions, 290 flow [2021-12-14 16:45:51,441 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 112 transitions, 248 flow [2021-12-14 16:45:51,471 INFO L129 PetriNetUnfolder]: 10/111 cut-off events. [2021-12-14 16:45:51,476 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-14 16:45:51,476 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:45:51,477 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 16:45:51,478 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 16:45:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:45:51,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1320447835, now seen corresponding path program 1 times [2021-12-14 16:45:51,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:45:51,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054007812] [2021-12-14 16:45:51,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:45:51,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:45:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:45:51,708 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 16:45:51,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:45:51,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054007812] [2021-12-14 16:45:51,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054007812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:45:51,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:45:51,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:45:51,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483441030] [2021-12-14 16:45:51,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:45:51,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 16:45:51,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:45:51,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 16:45:51,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 16:45:51,751 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 129 [2021-12-14 16:45:51,756 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 112 transitions, 248 flow. Second operand has 2 states, 2 states have (on average 119.5) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states 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 16:45:51,757 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:45:51,757 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 129 [2021-12-14 16:45:51,758 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:45:51,811 INFO L129 PetriNetUnfolder]: 4/106 cut-off events. [2021-12-14 16:45:51,811 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-12-14 16:45:51,813 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 106 events. 4/106 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 18/118 useless extension candidates. Maximal degree in co-relation 86. Up to 9 conditions per place. [2021-12-14 16:45:51,815 INFO L132 encePairwiseOnDemand]: 123/129 looper letters, 8 selfloop transitions, 0 changer transitions 2/106 dead transitions. [2021-12-14 16:45:51,815 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 106 transitions, 252 flow [2021-12-14 16:45:51,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 16:45:51,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-14 16:45:51,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 242 transitions. [2021-12-14 16:45:51,825 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.937984496124031 [2021-12-14 16:45:51,826 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 242 transitions. [2021-12-14 16:45:51,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 242 transitions. [2021-12-14 16:45:51,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:45:51,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 242 transitions. [2021-12-14 16:45:51,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 121.0) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 0 states 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 16:45:51,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states 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 16:45:51,840 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states 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 16:45:51,843 INFO L186 Difference]: Start difference. First operand has 115 places, 112 transitions, 248 flow. Second operand 2 states and 242 transitions. [2021-12-14 16:45:51,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 106 transitions, 252 flow [2021-12-14 16:45:51,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 106 transitions, 236 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-12-14 16:45:51,849 INFO L242 Difference]: Finished difference. Result has 108 places, 104 transitions, 216 flow [2021-12-14 16:45:51,852 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=216, PETRI_PLACES=108, PETRI_TRANSITIONS=104} [2021-12-14 16:45:51,855 INFO L334 CegarLoopForPetriNet]: 115 programPoint places, -7 predicate places. [2021-12-14 16:45:51,855 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 104 transitions, 216 flow [2021-12-14 16:45:51,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 119.5) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states 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 16:45:51,856 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:45:51,860 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 16:45:51,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:45:51,860 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 16:45:51,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:45:51,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1027447866, now seen corresponding path program 1 times [2021-12-14 16:45:51,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:45:51,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818020169] [2021-12-14 16:45:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:45:51,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:45:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:45:52,190 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 16:45:52,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:45:52,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818020169] [2021-12-14 16:45:52,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818020169] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:45:52,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:45:52,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:45:52,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811924720] [2021-12-14 16:45:52,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:45:52,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:45:52,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:45:52,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:45:52,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:45:52,197 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 129 [2021-12-14 16:45:52,197 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 104 transitions, 216 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 16:45:52,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:45:52,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 129 [2021-12-14 16:45:52,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:45:52,654 INFO L129 PetriNetUnfolder]: 1672/2858 cut-off events. [2021-12-14 16:45:52,654 INFO L130 PetriNetUnfolder]: For 125/177 co-relation queries the response was YES. [2021-12-14 16:45:52,659 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5261 conditions, 2858 events. 1672/2858 cut-off events. For 125/177 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 15534 event pairs, 727 based on Foata normal form. 1/2129 useless extension candidates. Maximal degree in co-relation 5258. Up to 1838 conditions per place. [2021-12-14 16:45:52,671 INFO L132 encePairwiseOnDemand]: 119/129 looper letters, 51 selfloop transitions, 7 changer transitions 4/126 dead transitions. [2021-12-14 16:45:52,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 126 transitions, 391 flow [2021-12-14 16:45:52,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:45:52,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-14 16:45:52,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 623 transitions. [2021-12-14 16:45:52,674 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.689922480620155 [2021-12-14 16:45:52,674 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 623 transitions. [2021-12-14 16:45:52,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 623 transitions. [2021-12-14 16:45:52,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:45:52,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 623 transitions. [2021-12-14 16:45:52,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 16:45:52,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states 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 16:45:52,679 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states 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 16:45:52,679 INFO L186 Difference]: Start difference. First operand has 108 places, 104 transitions, 216 flow. Second operand 7 states and 623 transitions. [2021-12-14 16:45:52,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 126 transitions, 391 flow [2021-12-14 16:45:52,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 126 transitions, 391 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-14 16:45:52,682 INFO L242 Difference]: Finished difference. Result has 115 places, 108 transitions, 257 flow [2021-12-14 16:45:52,682 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=257, PETRI_PLACES=115, PETRI_TRANSITIONS=108} [2021-12-14 16:45:52,683 INFO L334 CegarLoopForPetriNet]: 115 programPoint places, 0 predicate places. [2021-12-14 16:45:52,683 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 108 transitions, 257 flow [2021-12-14 16:45:52,684 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 16:45:52,684 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:45:52,684 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] [2021-12-14 16:45:52,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:45:52,684 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 16:45:52,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:45:52,685 INFO L85 PathProgramCache]: Analyzing trace with hash 2095688119, now seen corresponding path program 1 times [2021-12-14 16:45:52,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:45:52,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630634896] [2021-12-14 16:45:52,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:45:52,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:45:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:45:52,904 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 16:45:52,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:45:52,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630634896] [2021-12-14 16:45:52,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630634896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:45:52,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:45:52,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:45:52,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009371320] [2021-12-14 16:45:52,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:45:52,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:45:52,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:45:52,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:45:52,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:45:52,907 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 129 [2021-12-14 16:45:52,908 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 108 transitions, 257 flow. Second operand has 6 states, 6 states have (on average 83.5) internal successors, (501), 6 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:45:52,908 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:45:52,908 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 129 [2021-12-14 16:45:52,908 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:45:53,255 INFO L129 PetriNetUnfolder]: 1645/2775 cut-off events. [2021-12-14 16:45:53,255 INFO L130 PetriNetUnfolder]: For 410/472 co-relation queries the response was YES. [2021-12-14 16:45:53,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5882 conditions, 2775 events. 1645/2775 cut-off events. For 410/472 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 15426 event pairs, 251 based on Foata normal form. 0/2123 useless extension candidates. Maximal degree in co-relation 5875. Up to 1840 conditions per place. [2021-12-14 16:45:53,274 INFO L132 encePairwiseOnDemand]: 118/129 looper letters, 60 selfloop transitions, 13 changer transitions 1/136 dead transitions. [2021-12-14 16:45:53,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 136 transitions, 483 flow [2021-12-14 16:45:53,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:45:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-14 16:45:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 544 transitions. [2021-12-14 16:45:53,276 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7028423772609819 [2021-12-14 16:45:53,276 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 544 transitions. [2021-12-14 16:45:53,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 544 transitions. [2021-12-14 16:45:53,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:45:53,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 544 transitions. [2021-12-14 16:45:53,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 90.66666666666667) internal successors, (544), 6 states have internal predecessors, (544), 0 states have call successors, (0), 0 states 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 16:45:53,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states 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 16:45:53,279 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states 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 16:45:53,280 INFO L186 Difference]: Start difference. First operand has 115 places, 108 transitions, 257 flow. Second operand 6 states and 544 transitions. [2021-12-14 16:45:53,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 136 transitions, 483 flow [2021-12-14 16:45:53,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 136 transitions, 466 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-12-14 16:45:53,283 INFO L242 Difference]: Finished difference. Result has 115 places, 114 transitions, 311 flow [2021-12-14 16:45:53,283 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=311, PETRI_PLACES=115, PETRI_TRANSITIONS=114} [2021-12-14 16:45:53,284 INFO L334 CegarLoopForPetriNet]: 115 programPoint places, 0 predicate places. [2021-12-14 16:45:53,284 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 114 transitions, 311 flow [2021-12-14 16:45:53,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.5) internal successors, (501), 6 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:45:53,284 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:45:53,285 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] [2021-12-14 16:45:53,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:45:53,285 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 16:45:53,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:45:53,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1439782455, now seen corresponding path program 2 times [2021-12-14 16:45:53,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:45:53,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375192627] [2021-12-14 16:45:53,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:45:53,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:45:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:45:53,474 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 16:45:53,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:45:53,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375192627] [2021-12-14 16:45:53,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375192627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:45:53,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:45:53,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:45:53,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151294148] [2021-12-14 16:45:53,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:45:53,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:45:53,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:45:53,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:45:53,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:45:53,477 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 129 [2021-12-14 16:45:53,478 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 114 transitions, 311 flow. Second operand has 6 states, 6 states have (on average 83.5) internal successors, (501), 6 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:45:53,478 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:45:53,478 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 129 [2021-12-14 16:45:53,478 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:45:53,807 INFO L129 PetriNetUnfolder]: 1568/2655 cut-off events. [2021-12-14 16:45:53,807 INFO L130 PetriNetUnfolder]: For 969/1016 co-relation queries the response was YES. [2021-12-14 16:45:53,812 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6238 conditions, 2655 events. 1568/2655 cut-off events. For 969/1016 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 14367 event pairs, 348 based on Foata normal form. 26/2273 useless extension candidates. Maximal degree in co-relation 6231. Up to 1799 conditions per place. [2021-12-14 16:45:53,828 INFO L132 encePairwiseOnDemand]: 118/129 looper letters, 61 selfloop transitions, 13 changer transitions 2/138 dead transitions. [2021-12-14 16:45:53,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 138 transitions, 533 flow [2021-12-14 16:45:53,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:45:53,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-14 16:45:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 542 transitions. [2021-12-14 16:45:53,830 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7002583979328165 [2021-12-14 16:45:53,830 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 542 transitions. [2021-12-14 16:45:53,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 542 transitions. [2021-12-14 16:45:53,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:45:53,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 542 transitions. [2021-12-14 16:45:53,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 90.33333333333333) internal successors, (542), 6 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:45:53,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states 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 16:45:53,834 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states 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 16:45:53,834 INFO L186 Difference]: Start difference. First operand has 115 places, 114 transitions, 311 flow. Second operand 6 states and 542 transitions. [2021-12-14 16:45:53,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 138 transitions, 533 flow [2021-12-14 16:45:53,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 138 transitions, 511 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-14 16:45:53,839 INFO L242 Difference]: Finished difference. Result has 118 places, 116 transitions, 344 flow [2021-12-14 16:45:53,839 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=344, PETRI_PLACES=118, PETRI_TRANSITIONS=116} [2021-12-14 16:45:53,839 INFO L334 CegarLoopForPetriNet]: 115 programPoint places, 3 predicate places. [2021-12-14 16:45:53,840 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 116 transitions, 344 flow [2021-12-14 16:45:53,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.5) internal successors, (501), 6 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:45:53,840 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:45:53,840 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] [2021-12-14 16:45:53,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:45:53,841 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 16:45:53,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:45:53,841 INFO L85 PathProgramCache]: Analyzing trace with hash -289692152, now seen corresponding path program 1 times [2021-12-14 16:45:53,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:45:53,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086862796] [2021-12-14 16:45:53,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:45:53,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:45:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:45:54,010 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 16:45:54,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:45:54,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086862796] [2021-12-14 16:45:54,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086862796] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:45:54,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117708102] [2021-12-14 16:45:54,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:45:54,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:45:54,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:45:54,013 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 16:45:54,014 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 16:45:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:45:54,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 16:45:54,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:45:54,483 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 16:45:54,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:45:55,158 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 16:45:55,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117708102] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:45:55,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:45:55,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-12-14 16:45:55,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038737708] [2021-12-14 16:45:55,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:45:55,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:45:55,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:45:55,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:45:55,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:45:55,162 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 129 [2021-12-14 16:45:55,163 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 116 transitions, 344 flow. Second operand has 14 states, 14 states have (on average 82.64285714285714) internal successors, (1157), 14 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:45:55,163 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:45:55,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 129 [2021-12-14 16:45:55,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:45:56,062 INFO L129 PetriNetUnfolder]: 2935/5102 cut-off events. [2021-12-14 16:45:56,062 INFO L130 PetriNetUnfolder]: For 2538/2572 co-relation queries the response was YES. [2021-12-14 16:45:56,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12363 conditions, 5102 events. 2935/5102 cut-off events. For 2538/2572 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 32037 event pairs, 402 based on Foata normal form. 127/4540 useless extension candidates. Maximal degree in co-relation 12354. Up to 1211 conditions per place. [2021-12-14 16:45:56,104 INFO L132 encePairwiseOnDemand]: 114/129 looper letters, 145 selfloop transitions, 28 changer transitions 2/237 dead transitions. [2021-12-14 16:45:56,104 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 237 transitions, 1062 flow [2021-12-14 16:45:56,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:45:56,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:45:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1267 transitions. [2021-12-14 16:45:56,108 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7015503875968992 [2021-12-14 16:45:56,108 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1267 transitions. [2021-12-14 16:45:56,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1267 transitions. [2021-12-14 16:45:56,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:45:56,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1267 transitions. [2021-12-14 16:45:56,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 90.5) internal successors, (1267), 14 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states 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 16:45:56,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 129.0) internal successors, (1935), 15 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states 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 16:45:56,115 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 129.0) internal successors, (1935), 15 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states 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 16:45:56,115 INFO L186 Difference]: Start difference. First operand has 118 places, 116 transitions, 344 flow. Second operand 14 states and 1267 transitions. [2021-12-14 16:45:56,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 237 transitions, 1062 flow [2021-12-14 16:45:56,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 237 transitions, 1025 flow, removed 12 selfloop flow, removed 3 redundant places. [2021-12-14 16:45:56,127 INFO L242 Difference]: Finished difference. Result has 135 places, 128 transitions, 486 flow [2021-12-14 16:45:56,128 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=486, PETRI_PLACES=135, PETRI_TRANSITIONS=128} [2021-12-14 16:45:56,130 INFO L334 CegarLoopForPetriNet]: 115 programPoint places, 20 predicate places. [2021-12-14 16:45:56,130 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 128 transitions, 486 flow [2021-12-14 16:45:56,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.64285714285714) internal successors, (1157), 14 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:45:56,131 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:45:56,131 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] [2021-12-14 16:45:56,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 16:45:56,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:45:56,345 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 16:45:56,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:45:56,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1112995835, now seen corresponding path program 3 times [2021-12-14 16:45:56,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:45:56,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519536830] [2021-12-14 16:45:56,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:45:56,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:45:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:45:56,519 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 16:45:56,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:45:56,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519536830] [2021-12-14 16:45:56,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519536830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:45:56,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:45:56,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:45:56,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348562536] [2021-12-14 16:45:56,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:45:56,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:45:56,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:45:56,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:45:56,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:45:56,521 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 129 [2021-12-14 16:45:56,521 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 128 transitions, 486 flow. Second operand has 7 states, 7 states have (on average 82.71428571428571) internal successors, (579), 7 states have internal predecessors, (579), 0 states have call successors, (0), 0 states 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 16:45:56,522 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:45:56,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 129 [2021-12-14 16:45:56,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:45:57,065 INFO L129 PetriNetUnfolder]: 3245/5392 cut-off events. [2021-12-14 16:45:57,066 INFO L130 PetriNetUnfolder]: For 7270/7305 co-relation queries the response was YES. [2021-12-14 16:45:57,084 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15794 conditions, 5392 events. 3245/5392 cut-off events. For 7270/7305 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 32477 event pairs, 835 based on Foata normal form. 84/4718 useless extension candidates. Maximal degree in co-relation 15779. Up to 2724 conditions per place. [2021-12-14 16:45:57,112 INFO L132 encePairwiseOnDemand]: 119/129 looper letters, 88 selfloop transitions, 17 changer transitions 2/169 dead transitions. [2021-12-14 16:45:57,113 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 169 transitions, 867 flow [2021-12-14 16:45:57,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:45:57,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-14 16:45:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 635 transitions. [2021-12-14 16:45:57,115 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7032115171650055 [2021-12-14 16:45:57,115 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 635 transitions. [2021-12-14 16:45:57,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 635 transitions. [2021-12-14 16:45:57,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:45:57,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 635 transitions. [2021-12-14 16:45:57,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.71428571428571) internal successors, (635), 7 states have internal predecessors, (635), 0 states have call successors, (0), 0 states 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 16:45:57,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states 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 16:45:57,118 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states 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 16:45:57,118 INFO L186 Difference]: Start difference. First operand has 135 places, 128 transitions, 486 flow. Second operand 7 states and 635 transitions. [2021-12-14 16:45:57,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 169 transitions, 867 flow [2021-12-14 16:45:57,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 169 transitions, 840 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-12-14 16:45:57,143 INFO L242 Difference]: Finished difference. Result has 138 places, 129 transitions, 522 flow [2021-12-14 16:45:57,144 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=522, PETRI_PLACES=138, PETRI_TRANSITIONS=129} [2021-12-14 16:45:57,144 INFO L334 CegarLoopForPetriNet]: 115 programPoint places, 23 predicate places. [2021-12-14 16:45:57,144 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 129 transitions, 522 flow [2021-12-14 16:45:57,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.71428571428571) internal successors, (579), 7 states have internal predecessors, (579), 0 states have call successors, (0), 0 states 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 16:45:57,145 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:45:57,145 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] [2021-12-14 16:45:57,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:45:57,145 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 16:45:57,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:45:57,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1950645235, now seen corresponding path program 1 times [2021-12-14 16:45:57,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:45:57,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556292636] [2021-12-14 16:45:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:45:57,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:45:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:45:57,273 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 16:45:57,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:45:57,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556292636] [2021-12-14 16:45:57,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556292636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:45:57,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:45:57,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:45:57,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167093076] [2021-12-14 16:45:57,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:45:57,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:45:57,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:45:57,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:45:57,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:45:57,276 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 129 [2021-12-14 16:45:57,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 129 transitions, 522 flow. Second operand has 6 states, 6 states have (on average 83.5) internal successors, (501), 6 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:45:57,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:45:57,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 129 [2021-12-14 16:45:57,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:45:57,733 INFO L129 PetriNetUnfolder]: 3216/5334 cut-off events. [2021-12-14 16:45:57,733 INFO L130 PetriNetUnfolder]: For 10161/10223 co-relation queries the response was YES. [2021-12-14 16:45:57,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16884 conditions, 5334 events. 3216/5334 cut-off events. For 10161/10223 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 32411 event pairs, 1031 based on Foata normal form. 2/4612 useless extension candidates. Maximal degree in co-relation 16867. Up to 4108 conditions per place. [2021-12-14 16:45:57,779 INFO L132 encePairwiseOnDemand]: 118/129 looper letters, 80 selfloop transitions, 21 changer transitions 2/165 dead transitions. [2021-12-14 16:45:57,779 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 165 transitions, 978 flow [2021-12-14 16:45:57,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:45:57,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-14 16:45:57,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 544 transitions. [2021-12-14 16:45:57,781 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7028423772609819 [2021-12-14 16:45:57,781 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 544 transitions. [2021-12-14 16:45:57,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 544 transitions. [2021-12-14 16:45:57,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:45:57,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 544 transitions. [2021-12-14 16:45:57,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 90.66666666666667) internal successors, (544), 6 states have internal predecessors, (544), 0 states have call successors, (0), 0 states 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 16:45:57,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states 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 16:45:57,784 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states 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 16:45:57,784 INFO L186 Difference]: Start difference. First operand has 138 places, 129 transitions, 522 flow. Second operand 6 states and 544 transitions. [2021-12-14 16:45:57,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 165 transitions, 978 flow [2021-12-14 16:45:57,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 165 transitions, 949 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-14 16:45:57,810 INFO L242 Difference]: Finished difference. Result has 141 places, 139 transitions, 668 flow [2021-12-14 16:45:57,811 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=668, PETRI_PLACES=141, PETRI_TRANSITIONS=139} [2021-12-14 16:45:57,811 INFO L334 CegarLoopForPetriNet]: 115 programPoint places, 26 predicate places. [2021-12-14 16:45:57,811 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 139 transitions, 668 flow [2021-12-14 16:45:57,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.5) internal successors, (501), 6 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:45:57,812 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:45:57,812 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] [2021-12-14 16:45:57,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:45:57,812 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 16:45:57,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:45:57,813 INFO L85 PathProgramCache]: Analyzing trace with hash 875749367, now seen corresponding path program 2 times [2021-12-14 16:45:57,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:45:57,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952177509] [2021-12-14 16:45:57,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:45:57,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:45:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:45:57,928 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 16:45:57,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:45:57,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952177509] [2021-12-14 16:45:57,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952177509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:45:57,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:45:57,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:45:57,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881867428] [2021-12-14 16:45:57,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:45:57,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:45:57,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:45:57,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:45:57,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:45:57,930 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 129 [2021-12-14 16:45:57,931 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 139 transitions, 668 flow. Second operand has 6 states, 6 states have (on average 83.5) internal successors, (501), 6 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:45:57,931 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:45:57,931 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 129 [2021-12-14 16:45:57,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:45:58,362 INFO L129 PetriNetUnfolder]: 3137/5160 cut-off events. [2021-12-14 16:45:58,363 INFO L130 PetriNetUnfolder]: For 10173/10194 co-relation queries the response was YES. [2021-12-14 16:45:58,382 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17462 conditions, 5160 events. 3137/5160 cut-off events. For 10173/10194 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 31236 event pairs, 783 based on Foata normal form. 22/5026 useless extension candidates. Maximal degree in co-relation 17442. Up to 4065 conditions per place. [2021-12-14 16:45:58,403 INFO L132 encePairwiseOnDemand]: 118/129 looper letters, 82 selfloop transitions, 17 changer transitions 2/163 dead transitions. [2021-12-14 16:45:58,404 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 163 transitions, 976 flow [2021-12-14 16:45:58,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:45:58,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-14 16:45:58,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 542 transitions. [2021-12-14 16:45:58,405 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7002583979328165 [2021-12-14 16:45:58,405 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 542 transitions. [2021-12-14 16:45:58,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 542 transitions. [2021-12-14 16:45:58,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:45:58,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 542 transitions. [2021-12-14 16:45:58,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 90.33333333333333) internal successors, (542), 6 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:45:58,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states 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 16:45:58,408 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states 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 16:45:58,408 INFO L186 Difference]: Start difference. First operand has 141 places, 139 transitions, 668 flow. Second operand 6 states and 542 transitions. [2021-12-14 16:45:58,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 163 transitions, 976 flow [2021-12-14 16:45:58,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 163 transitions, 959 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-14 16:45:58,437 INFO L242 Difference]: Finished difference. Result has 145 places, 137 transitions, 662 flow [2021-12-14 16:45:58,437 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=662, PETRI_PLACES=145, PETRI_TRANSITIONS=137} [2021-12-14 16:45:58,511 INFO L334 CegarLoopForPetriNet]: 115 programPoint places, 30 predicate places. [2021-12-14 16:45:58,511 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 137 transitions, 662 flow [2021-12-14 16:45:58,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.5) internal successors, (501), 6 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:45:58,512 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:45:58,512 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] [2021-12-14 16:45:58,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:45:58,512 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 16:45:58,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:45:58,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1833408498, now seen corresponding path program 1 times [2021-12-14 16:45:58,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:45:58,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276047293] [2021-12-14 16:45:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:45:58,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:45:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:45:58,670 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 16:45:58,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:45:58,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276047293] [2021-12-14 16:45:58,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276047293] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:45:58,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576982792] [2021-12-14 16:45:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:45:58,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:45:58,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:45:58,679 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:45:58,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:45:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:45:58,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 16:45:58,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:45:59,170 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 16:45:59,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:45:59,386 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 16:45:59,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576982792] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:45:59,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:45:59,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-12-14 16:45:59,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408636111] [2021-12-14 16:45:59,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:45:59,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:45:59,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:45:59,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:45:59,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:45:59,393 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 129 [2021-12-14 16:45:59,394 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 137 transitions, 662 flow. Second operand has 14 states, 14 states have (on average 82.07142857142857) internal successors, (1149), 14 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states 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 16:45:59,394 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:45:59,394 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 129 [2021-12-14 16:45:59,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:46:00,938 INFO L129 PetriNetUnfolder]: 6276/10416 cut-off events. [2021-12-14 16:46:00,939 INFO L130 PetriNetUnfolder]: For 26456/26511 co-relation queries the response was YES. [2021-12-14 16:46:01,001 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36261 conditions, 10416 events. 6276/10416 cut-off events. For 26456/26511 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 72818 event pairs, 1406 based on Foata normal form. 314/10464 useless extension candidates. Maximal degree in co-relation 36239. Up to 3503 conditions per place. [2021-12-14 16:46:01,057 INFO L132 encePairwiseOnDemand]: 114/129 looper letters, 224 selfloop transitions, 32 changer transitions 2/320 dead transitions. [2021-12-14 16:46:01,058 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 320 transitions, 2354 flow [2021-12-14 16:46:01,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:46:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:46:01,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1267 transitions. [2021-12-14 16:46:01,061 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7015503875968992 [2021-12-14 16:46:01,061 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1267 transitions. [2021-12-14 16:46:01,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1267 transitions. [2021-12-14 16:46:01,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:46:01,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1267 transitions. [2021-12-14 16:46:01,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 90.5) internal successors, (1267), 14 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states 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 16:46:01,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 129.0) internal successors, (1935), 15 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states 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 16:46:01,067 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 129.0) internal successors, (1935), 15 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states 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 16:46:01,068 INFO L186 Difference]: Start difference. First operand has 145 places, 137 transitions, 662 flow. Second operand 14 states and 1267 transitions. [2021-12-14 16:46:01,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 320 transitions, 2354 flow [2021-12-14 16:46:01,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 320 transitions, 2313 flow, removed 12 selfloop flow, removed 3 redundant places. [2021-12-14 16:46:01,125 INFO L242 Difference]: Finished difference. Result has 162 places, 149 transitions, 816 flow [2021-12-14 16:46:01,125 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=816, PETRI_PLACES=162, PETRI_TRANSITIONS=149} [2021-12-14 16:46:01,126 INFO L334 CegarLoopForPetriNet]: 115 programPoint places, 47 predicate places. [2021-12-14 16:46:01,126 INFO L470 AbstractCegarLoop]: Abstraction has has 162 places, 149 transitions, 816 flow [2021-12-14 16:46:01,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.07142857142857) internal successors, (1149), 14 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states 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 16:46:01,126 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:46:01,127 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] [2021-12-14 16:46:01,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:46:01,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-14 16:46:01,345 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 16:46:01,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:46:01,345 INFO L85 PathProgramCache]: Analyzing trace with hash 381671547, now seen corresponding path program 3 times [2021-12-14 16:46:01,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:46:01,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355009704] [2021-12-14 16:46:01,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:01,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:46:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:01,649 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 16:46:01,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:46:01,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355009704] [2021-12-14 16:46:01,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355009704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:46:01,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:46:01,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:46:01,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748801997] [2021-12-14 16:46:01,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:46:01,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:46:01,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:46:01,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:46:01,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:46:01,651 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 129 [2021-12-14 16:46:01,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 149 transitions, 816 flow. Second operand has 7 states, 7 states have (on average 82.71428571428571) internal successors, (579), 7 states have internal predecessors, (579), 0 states have call successors, (0), 0 states 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 16:46:01,652 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:46:01,652 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 129 [2021-12-14 16:46:01,652 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:46:03,064 INFO L129 PetriNetUnfolder]: 6954/11287 cut-off events. [2021-12-14 16:46:03,065 INFO L130 PetriNetUnfolder]: For 41762/41780 co-relation queries the response was YES. [2021-12-14 16:46:03,201 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45133 conditions, 11287 events. 6954/11287 cut-off events. For 41762/41780 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 77533 event pairs, 2720 based on Foata normal form. 204/11218 useless extension candidates. Maximal degree in co-relation 45105. Up to 6746 conditions per place. [2021-12-14 16:46:03,260 INFO L132 encePairwiseOnDemand]: 119/129 looper letters, 120 selfloop transitions, 21 changer transitions 2/205 dead transitions. [2021-12-14 16:46:03,260 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 205 transitions, 1491 flow [2021-12-14 16:46:03,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:46:03,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-14 16:46:03,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 635 transitions. [2021-12-14 16:46:03,263 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7032115171650055 [2021-12-14 16:46:03,263 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 635 transitions. [2021-12-14 16:46:03,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 635 transitions. [2021-12-14 16:46:03,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:46:03,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 635 transitions. [2021-12-14 16:46:03,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.71428571428571) internal successors, (635), 7 states have internal predecessors, (635), 0 states have call successors, (0), 0 states 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 16:46:03,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states 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 16:46:03,266 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states 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 16:46:03,267 INFO L186 Difference]: Start difference. First operand has 162 places, 149 transitions, 816 flow. Second operand 7 states and 635 transitions. [2021-12-14 16:46:03,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 205 transitions, 1491 flow [2021-12-14 16:46:03,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 205 transitions, 1458 flow, removed 5 selfloop flow, removed 5 redundant places. [2021-12-14 16:46:03,340 INFO L242 Difference]: Finished difference. Result has 165 places, 150 transitions, 858 flow [2021-12-14 16:46:03,340 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=858, PETRI_PLACES=165, PETRI_TRANSITIONS=150} [2021-12-14 16:46:03,341 INFO L334 CegarLoopForPetriNet]: 115 programPoint places, 50 predicate places. [2021-12-14 16:46:03,341 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 150 transitions, 858 flow [2021-12-14 16:46:03,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.71428571428571) internal successors, (579), 7 states have internal predecessors, (579), 0 states have call successors, (0), 0 states 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 16:46:03,341 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:46:03,342 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] [2021-12-14 16:46:03,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:46:03,342 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:46:03,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:46:03,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1676109041, now seen corresponding path program 1 times [2021-12-14 16:46:03,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:46:03,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654479996] [2021-12-14 16:46:03,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:03,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:46:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:04,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:46:04,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654479996] [2021-12-14 16:46:04,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654479996] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:46:04,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183383055] [2021-12-14 16:46:04,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:04,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:46:04,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:46:04,204 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:46:04,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:46:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:33,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-14 16:46:33,443 INFO L286 TraceCheckSpWp]: Computing forward predicates...