./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/goblint-regression/28-race_reach_27-funptr_racing.i -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 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:51:06,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:51:06,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:51:06,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:51:06,691 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:51:06,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:51:06,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:51:06,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:51:06,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:51:06,707 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:51:06,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:51:06,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:51:06,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:51:06,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:51:06,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:51:06,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:51:06,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:51:06,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:51:06,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:51:06,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:51:06,729 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:51:06,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:51:06,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:51:06,733 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:51:06,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:51:06,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:51:06,742 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:51:06,742 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:51:06,743 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:51:06,743 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:51:06,744 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:51:06,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:51:06,746 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:51:06,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:51:06,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:51:06,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:51:06,749 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:51:06,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:51:06,750 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:51:06,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:51:06,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:51:06,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:51:06,759 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:51:06,803 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:51:06,803 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:51:06,804 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:51:06,804 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:51:06,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:51:06,805 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:51:06,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:51:06,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:51:06,806 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:51:06,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:51:06,807 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:51:06,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:51:06,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:51:06,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:51:06,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:51:06,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:51:06,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:51:06,809 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:51:06,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:51:06,809 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:51:06,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:51:06,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:51:06,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:51:06,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:51:06,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:51:06,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:51:06,811 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:51:06,811 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:51:06,811 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:51:06,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:51:06,812 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:51:06,812 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:51:06,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:51:06,813 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d [2022-07-21 08:51:07,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:51:07,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:51:07,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:51:07,142 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:51:07,143 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:51:07,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i [2022-07-21 08:51:07,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/686fe28cf/e765bdeb717b4d04a24db983f965c77c/FLAGa87d40bdc [2022-07-21 08:51:07,755 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:51:07,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i [2022-07-21 08:51:07,779 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/686fe28cf/e765bdeb717b4d04a24db983f965c77c/FLAGa87d40bdc [2022-07-21 08:51:08,075 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/686fe28cf/e765bdeb717b4d04a24db983f965c77c [2022-07-21 08:51:08,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:51:08,079 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:51:08,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:51:08,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:51:08,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:51:08,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:51:08" (1/1) ... [2022-07-21 08:51:08,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b2617e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:08, skipping insertion in model container [2022-07-21 08:51:08,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:51:08" (1/1) ... [2022-07-21 08:51:08,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:51:08,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:51:08,486 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/goblint-regression/28-race_reach_27-funptr_racing.i[41323,41336] [2022-07-21 08:51:08,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:51:08,535 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:51:08,578 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/goblint-regression/28-race_reach_27-funptr_racing.i[41323,41336] [2022-07-21 08:51:08,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:51:08,656 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:51:08,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:08 WrapperNode [2022-07-21 08:51:08,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:51:08,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:51:08,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:51:08,658 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:51:08,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:08" (1/1) ... [2022-07-21 08:51:08,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:08" (1/1) ... [2022-07-21 08:51:08,724 INFO L137 Inliner]: procedures = 273, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 148 [2022-07-21 08:51:08,724 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:51:08,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:51:08,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:51:08,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:51:08,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:08" (1/1) ... [2022-07-21 08:51:08,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:08" (1/1) ... [2022-07-21 08:51:08,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:08" (1/1) ... [2022-07-21 08:51:08,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:08" (1/1) ... [2022-07-21 08:51:08,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:08" (1/1) ... [2022-07-21 08:51:08,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:08" (1/1) ... [2022-07-21 08:51:08,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:08" (1/1) ... [2022-07-21 08:51:08,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:51:08,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:51:08,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:51:08,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:51:08,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:08" (1/1) ... [2022-07-21 08:51:08,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:51:08,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:08,806 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) [2022-07-21 08:51:08,812 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 [2022-07-21 08:51:08,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:51:08,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:51:08,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:51:08,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:51:08,841 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-21 08:51:08,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:51:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-21 08:51:08,842 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-21 08:51:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:51:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:51:08,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:51:08,844 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:51:08,940 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:51:08,942 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:51:09,246 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:51:09,254 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:51:09,263 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2022-07-21 08:51:09,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:51:09 BoogieIcfgContainer [2022-07-21 08:51:09,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:51:09,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:51:09,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:51:09,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:51:09,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:51:08" (1/3) ... [2022-07-21 08:51:09,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c724b58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:51:09, skipping insertion in model container [2022-07-21 08:51:09,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:08" (2/3) ... [2022-07-21 08:51:09,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c724b58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:51:09, skipping insertion in model container [2022-07-21 08:51:09,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:51:09" (3/3) ... [2022-07-21 08:51:09,283 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_27-funptr_racing.i [2022-07-21 08:51:09,288 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:51:09,297 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:51:09,297 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:51:09,297 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:51:09,389 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-21 08:51:09,445 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 139 places, 155 transitions, 318 flow [2022-07-21 08:51:09,537 INFO L129 PetriNetUnfolder]: 24/195 cut-off events. [2022-07-21 08:51:09,541 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:51:09,549 INFO L84 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 195 events. 24/195 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 547 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 111. Up to 4 conditions per place. [2022-07-21 08:51:09,550 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 155 transitions, 318 flow [2022-07-21 08:51:09,555 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 150 transitions, 305 flow [2022-07-21 08:51:09,563 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:09,569 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1cd1eb57, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@57047864 [2022-07-21 08:51:09,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:09,583 INFO L129 PetriNetUnfolder]: 3/93 cut-off events. [2022-07-21 08:51:09,584 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:09,584 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:09,585 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:09,585 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:09,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:09,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1262661263, now seen corresponding path program 1 times [2022-07-21 08:51:09,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:09,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58061065] [2022-07-21 08:51:09,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:09,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:09,792 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:09,860 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:09,861 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:09,863 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:09,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:09,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:51:09,865 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-21 08:51:09,868 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:09,869 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-21 08:51:09,895 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 08:51:09,899 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 195 places, 223 transitions, 464 flow [2022-07-21 08:51:09,975 INFO L129 PetriNetUnfolder]: 45/328 cut-off events. [2022-07-21 08:51:09,975 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-21 08:51:09,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 328 events. 45/328 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1176 event pairs, 0 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 197. Up to 8 conditions per place. [2022-07-21 08:51:09,982 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 223 transitions, 464 flow [2022-07-21 08:51:09,989 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 223 transitions, 464 flow [2022-07-21 08:51:09,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:10,000 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1cd1eb57, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@57047864 [2022-07-21 08:51:10,000 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:10,017 INFO L129 PetriNetUnfolder]: 3/93 cut-off events. [2022-07-21 08:51:10,017 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:51:10,017 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:10,017 INFO L200 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] [2022-07-21 08:51:10,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:10,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:10,019 INFO L85 PathProgramCache]: Analyzing trace with hash 205301018, now seen corresponding path program 1 times [2022-07-21 08:51:10,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:10,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499931003] [2022-07-21 08:51:10,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:10,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:10,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:10,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499931003] [2022-07-21 08:51:10,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499931003] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:10,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:10,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:10,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456699030] [2022-07-21 08:51:10,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:10,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:10,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:10,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:10,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:10,234 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 223 [2022-07-21 08:51:10,240 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 223 transitions, 464 flow. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:10,241 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:10,241 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 223 [2022-07-21 08:51:10,242 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:10,366 INFO L129 PetriNetUnfolder]: 4/264 cut-off events. [2022-07-21 08:51:10,367 INFO L130 PetriNetUnfolder]: For 14/33 co-relation queries the response was YES. [2022-07-21 08:51:10,370 INFO L84 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 264 events. 4/264 cut-off events. For 14/33 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 784 event pairs, 0 based on Foata normal form. 89/343 useless extension candidates. Maximal degree in co-relation 168. Up to 16 conditions per place. [2022-07-21 08:51:10,372 INFO L132 encePairwiseOnDemand]: 191/223 looper letters, 13 selfloop transitions, 2 changer transitions 0/197 dead transitions. [2022-07-21 08:51:10,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 197 transitions, 442 flow [2022-07-21 08:51:10,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:10,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:10,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2022-07-21 08:51:10,394 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9028400597907325 [2022-07-21 08:51:10,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2022-07-21 08:51:10,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2022-07-21 08:51:10,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:10,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2022-07-21 08:51:10,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:10,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:10,419 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:10,422 INFO L186 Difference]: Start difference. First operand has 195 places, 223 transitions, 464 flow. Second operand 3 states and 604 transitions. [2022-07-21 08:51:10,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 197 transitions, 442 flow [2022-07-21 08:51:10,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 197 transitions, 442 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:10,434 INFO L242 Difference]: Finished difference. Result has 197 places, 194 transitions, 416 flow [2022-07-21 08:51:10,436 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=416, PETRI_PLACES=197, PETRI_TRANSITIONS=194} [2022-07-21 08:51:10,440 INFO L279 CegarLoopForPetriNet]: 195 programPoint places, 2 predicate places. [2022-07-21 08:51:10,446 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 194 transitions, 416 flow [2022-07-21 08:51:10,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:10,447 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:10,447 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:10,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:51:10,448 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:10,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:10,449 INFO L85 PathProgramCache]: Analyzing trace with hash 229803728, now seen corresponding path program 1 times [2022-07-21 08:51:10,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:10,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007253900] [2022-07-21 08:51:10,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:10,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:10,497 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:10,543 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:10,543 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:10,544 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:10,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:10,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:51:10,545 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-21 08:51:10,546 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:10,546 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-21 08:51:10,603 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 08:51:10,610 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 251 places, 291 transitions, 612 flow [2022-07-21 08:51:10,710 INFO L129 PetriNetUnfolder]: 71/494 cut-off events. [2022-07-21 08:51:10,710 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-21 08:51:10,721 INFO L84 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 494 events. 71/494 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1986 event pairs, 1 based on Foata normal form. 0/415 useless extension candidates. Maximal degree in co-relation 336. Up to 16 conditions per place. [2022-07-21 08:51:10,721 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 291 transitions, 612 flow [2022-07-21 08:51:10,731 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 251 places, 291 transitions, 612 flow [2022-07-21 08:51:10,732 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:10,736 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1cd1eb57, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@57047864 [2022-07-21 08:51:10,737 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:10,748 INFO L129 PetriNetUnfolder]: 4/98 cut-off events. [2022-07-21 08:51:10,749 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:51:10,749 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:10,749 INFO L200 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] [2022-07-21 08:51:10,749 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:10,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:10,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1082067815, now seen corresponding path program 1 times [2022-07-21 08:51:10,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:10,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458853861] [2022-07-21 08:51:10,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:10,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:10,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:10,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458853861] [2022-07-21 08:51:10,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458853861] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:10,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:10,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:51:10,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663569052] [2022-07-21 08:51:10,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:10,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:51:10,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:10,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:51:10,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:51:10,828 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 291 [2022-07-21 08:51:10,829 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 291 transitions, 612 flow. Second operand has 2 states, 2 states have (on average 243.5) internal successors, (487), 2 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:10,829 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:10,829 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 291 [2022-07-21 08:51:10,829 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:10,944 INFO L129 PetriNetUnfolder]: 11/430 cut-off events. [2022-07-21 08:51:10,944 INFO L130 PetriNetUnfolder]: For 53/64 co-relation queries the response was YES. [2022-07-21 08:51:10,948 INFO L84 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 430 events. 11/430 cut-off events. For 53/64 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1666 event pairs, 1 based on Foata normal form. 174/585 useless extension candidates. Maximal degree in co-relation 299. Up to 16 conditions per place. [2022-07-21 08:51:10,950 INFO L132 encePairwiseOnDemand]: 250/291 looper letters, 6 selfloop transitions, 0 changer transitions 0/249 dead transitions. [2022-07-21 08:51:10,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 249 transitions, 540 flow [2022-07-21 08:51:10,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:51:10,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:51:10,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 533 transitions. [2022-07-21 08:51:10,952 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.915807560137457 [2022-07-21 08:51:10,952 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 533 transitions. [2022-07-21 08:51:10,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 533 transitions. [2022-07-21 08:51:10,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:10,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 533 transitions. [2022-07-21 08:51:10,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 266.5) internal successors, (533), 2 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:10,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:10,957 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:10,957 INFO L186 Difference]: Start difference. First operand has 251 places, 291 transitions, 612 flow. Second operand 2 states and 533 transitions. [2022-07-21 08:51:10,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 249 transitions, 540 flow [2022-07-21 08:51:10,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 249 transitions, 540 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:10,963 INFO L242 Difference]: Finished difference. Result has 251 places, 249 transitions, 528 flow [2022-07-21 08:51:10,963 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=528, PETRI_PLACES=251, PETRI_TRANSITIONS=249} [2022-07-21 08:51:10,964 INFO L279 CegarLoopForPetriNet]: 251 programPoint places, 0 predicate places. [2022-07-21 08:51:10,964 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 249 transitions, 528 flow [2022-07-21 08:51:10,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 243.5) internal successors, (487), 2 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:10,965 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:10,965 INFO L200 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] [2022-07-21 08:51:10,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:51:10,965 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:10,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:10,966 INFO L85 PathProgramCache]: Analyzing trace with hash 425483994, now seen corresponding path program 1 times [2022-07-21 08:51:10,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:10,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158069101] [2022-07-21 08:51:10,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:10,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:11,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:11,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158069101] [2022-07-21 08:51:11,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158069101] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:11,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:11,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:11,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254356855] [2022-07-21 08:51:11,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:11,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:11,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:11,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:11,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:11,043 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 291 [2022-07-21 08:51:11,045 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 249 transitions, 528 flow. Second operand has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:11,045 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:11,045 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 291 [2022-07-21 08:51:11,045 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:11,160 INFO L129 PetriNetUnfolder]: 10/409 cut-off events. [2022-07-21 08:51:11,161 INFO L130 PetriNetUnfolder]: For 61/127 co-relation queries the response was YES. [2022-07-21 08:51:11,166 INFO L84 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 409 events. 10/409 cut-off events. For 61/127 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1537 event pairs, 1 based on Foata normal form. 1/393 useless extension candidates. Maximal degree in co-relation 467. Up to 30 conditions per place. [2022-07-21 08:51:11,168 INFO L132 encePairwiseOnDemand]: 288/291 looper letters, 15 selfloop transitions, 2 changer transitions 0/253 dead transitions. [2022-07-21 08:51:11,171 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 253 transitions, 570 flow [2022-07-21 08:51:11,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:11,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:11,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 726 transitions. [2022-07-21 08:51:11,174 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8316151202749141 [2022-07-21 08:51:11,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 726 transitions. [2022-07-21 08:51:11,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 726 transitions. [2022-07-21 08:51:11,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:11,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 726 transitions. [2022-07-21 08:51:11,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:11,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:11,181 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:11,181 INFO L186 Difference]: Start difference. First operand has 251 places, 249 transitions, 528 flow. Second operand 3 states and 726 transitions. [2022-07-21 08:51:11,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 253 transitions, 570 flow [2022-07-21 08:51:11,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 253 transitions, 570 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:11,191 INFO L242 Difference]: Finished difference. Result has 254 places, 250 transitions, 540 flow [2022-07-21 08:51:11,192 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=540, PETRI_PLACES=254, PETRI_TRANSITIONS=250} [2022-07-21 08:51:11,194 INFO L279 CegarLoopForPetriNet]: 251 programPoint places, 3 predicate places. [2022-07-21 08:51:11,194 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 250 transitions, 540 flow [2022-07-21 08:51:11,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:11,195 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:11,195 INFO L200 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] [2022-07-21 08:51:11,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:51:11,195 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:11,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:11,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1300377558, now seen corresponding path program 1 times [2022-07-21 08:51:11,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:11,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920153048] [2022-07-21 08:51:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:11,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:11,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:11,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920153048] [2022-07-21 08:51:11,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920153048] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:11,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425637249] [2022-07-21 08:51:11,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:11,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:11,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:11,279 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) [2022-07-21 08:51:11,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:51:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:11,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:11,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:11,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:11,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425637249] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:11,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:11,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:11,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198600797] [2022-07-21 08:51:11,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:11,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:11,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:11,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:11,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:11,534 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 291 [2022-07-21 08:51:11,545 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 250 transitions, 540 flow. Second operand has 10 states, 10 states have (on average 237.3) internal successors, (2373), 10 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:11,546 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:11,546 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 291 [2022-07-21 08:51:11,546 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:11,708 INFO L129 PetriNetUnfolder]: 8/367 cut-off events. [2022-07-21 08:51:11,708 INFO L130 PetriNetUnfolder]: For 53/66 co-relation queries the response was YES. [2022-07-21 08:51:11,713 INFO L84 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 367 events. 8/367 cut-off events. For 53/66 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1071 event pairs, 5 based on Foata normal form. 3/358 useless extension candidates. Maximal degree in co-relation 432. Up to 17 conditions per place. [2022-07-21 08:51:11,715 INFO L132 encePairwiseOnDemand]: 285/291 looper letters, 16 selfloop transitions, 9 changer transitions 0/260 dead transitions. [2022-07-21 08:51:11,715 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 260 transitions, 612 flow [2022-07-21 08:51:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:11,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2142 transitions. [2022-07-21 08:51:11,720 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8178694158075601 [2022-07-21 08:51:11,720 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2142 transitions. [2022-07-21 08:51:11,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2142 transitions. [2022-07-21 08:51:11,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:11,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2142 transitions. [2022-07-21 08:51:11,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 238.0) internal successors, (2142), 9 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:11,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:11,733 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:11,733 INFO L186 Difference]: Start difference. First operand has 254 places, 250 transitions, 540 flow. Second operand 9 states and 2142 transitions. [2022-07-21 08:51:11,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 260 transitions, 612 flow [2022-07-21 08:51:11,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 260 transitions, 610 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:11,740 INFO L242 Difference]: Finished difference. Result has 264 places, 256 transitions, 588 flow [2022-07-21 08:51:11,741 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=588, PETRI_PLACES=264, PETRI_TRANSITIONS=256} [2022-07-21 08:51:11,744 INFO L279 CegarLoopForPetriNet]: 251 programPoint places, 13 predicate places. [2022-07-21 08:51:11,744 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 256 transitions, 588 flow [2022-07-21 08:51:11,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 237.3) internal successors, (2373), 10 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:11,746 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:11,746 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:11,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 08:51:11,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-21 08:51:11,974 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:11,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:11,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1845844492, now seen corresponding path program 1 times [2022-07-21 08:51:11,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:11,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193349324] [2022-07-21 08:51:11,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:11,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:12,005 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:12,046 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:12,047 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:12,047 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:12,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:12,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:51:12,047 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-21 08:51:12,048 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:12,048 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-21 08:51:12,101 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-21 08:51:12,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 307 places, 359 transitions, 762 flow [2022-07-21 08:51:12,269 INFO L129 PetriNetUnfolder]: 109/728 cut-off events. [2022-07-21 08:51:12,270 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-21 08:51:12,282 INFO L84 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 728 events. 109/728 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3198 event pairs, 6 based on Foata normal form. 0/614 useless extension candidates. Maximal degree in co-relation 514. Up to 32 conditions per place. [2022-07-21 08:51:12,283 INFO L82 GeneralOperation]: Start removeDead. Operand has 307 places, 359 transitions, 762 flow [2022-07-21 08:51:12,294 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 307 places, 359 transitions, 762 flow [2022-07-21 08:51:12,296 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:12,303 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1cd1eb57, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@57047864 [2022-07-21 08:51:12,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:12,312 INFO L129 PetriNetUnfolder]: 4/99 cut-off events. [2022-07-21 08:51:12,312 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:51:12,312 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:12,313 INFO L200 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] [2022-07-21 08:51:12,313 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:12,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:12,313 INFO L85 PathProgramCache]: Analyzing trace with hash 3429786, now seen corresponding path program 1 times [2022-07-21 08:51:12,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:12,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859941685] [2022-07-21 08:51:12,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:12,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:12,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:12,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859941685] [2022-07-21 08:51:12,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859941685] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:12,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:12,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:12,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032335722] [2022-07-21 08:51:12,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:12,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:12,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:12,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:12,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:12,374 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 359 [2022-07-21 08:51:12,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 359 transitions, 762 flow. Second operand has 3 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:12,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 359 [2022-07-21 08:51:12,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:12,553 INFO L129 PetriNetUnfolder]: 24/618 cut-off events. [2022-07-21 08:51:12,554 INFO L130 PetriNetUnfolder]: For 166/358 co-relation queries the response was YES. [2022-07-21 08:51:12,565 INFO L84 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 618 events. 24/618 cut-off events. For 166/358 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2756 event pairs, 6 based on Foata normal form. 655/1245 useless extension candidates. Maximal degree in co-relation 463. Up to 56 conditions per place. [2022-07-21 08:51:12,568 INFO L132 encePairwiseOnDemand]: 303/359 looper letters, 17 selfloop transitions, 2 changer transitions 0/309 dead transitions. [2022-07-21 08:51:12,568 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 309 transitions, 700 flow [2022-07-21 08:51:12,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:12,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:12,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 956 transitions. [2022-07-21 08:51:12,570 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8876508820798514 [2022-07-21 08:51:12,570 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 956 transitions. [2022-07-21 08:51:12,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 956 transitions. [2022-07-21 08:51:12,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:12,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 956 transitions. [2022-07-21 08:51:12,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 318.6666666666667) internal successors, (956), 3 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,575 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,575 INFO L186 Difference]: Start difference. First operand has 307 places, 359 transitions, 762 flow. Second operand 3 states and 956 transitions. [2022-07-21 08:51:12,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 309 transitions, 700 flow [2022-07-21 08:51:12,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 309 transitions, 700 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:12,581 INFO L242 Difference]: Finished difference. Result has 309 places, 306 transitions, 666 flow [2022-07-21 08:51:12,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=666, PETRI_PLACES=309, PETRI_TRANSITIONS=306} [2022-07-21 08:51:12,582 INFO L279 CegarLoopForPetriNet]: 307 programPoint places, 2 predicate places. [2022-07-21 08:51:12,583 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 306 transitions, 666 flow [2022-07-21 08:51:12,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,583 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:12,583 INFO L200 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] [2022-07-21 08:51:12,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 08:51:12,584 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:12,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1442034232, now seen corresponding path program 1 times [2022-07-21 08:51:12,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:12,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039214518] [2022-07-21 08:51:12,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:12,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:12,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:12,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:12,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039214518] [2022-07-21 08:51:12,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039214518] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:12,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440011802] [2022-07-21 08:51:12,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:12,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:12,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:12,642 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) [2022-07-21 08:51:12,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 08:51:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:12,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:12,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:12,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:12,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440011802] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:12,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:12,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:12,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313060418] [2022-07-21 08:51:12,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:12,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:12,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:12,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:12,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:12,847 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 359 [2022-07-21 08:51:12,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 306 transitions, 666 flow. Second operand has 10 states, 10 states have (on average 291.3) internal successors, (2913), 10 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:12,850 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 359 [2022-07-21 08:51:12,850 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:13,064 INFO L129 PetriNetUnfolder]: 22/576 cut-off events. [2022-07-21 08:51:13,065 INFO L130 PetriNetUnfolder]: For 136/190 co-relation queries the response was YES. [2022-07-21 08:51:13,074 INFO L84 FinitePrefix]: Finished finitePrefix Result has 704 conditions, 576 events. 22/576 cut-off events. For 136/190 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2290 event pairs, 10 based on Foata normal form. 4/558 useless extension candidates. Maximal degree in co-relation 638. Up to 40 conditions per place. [2022-07-21 08:51:13,079 INFO L132 encePairwiseOnDemand]: 353/359 looper letters, 18 selfloop transitions, 9 changer transitions 0/316 dead transitions. [2022-07-21 08:51:13,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 316 transitions, 742 flow [2022-07-21 08:51:13,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:13,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:13,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2630 transitions. [2022-07-21 08:51:13,085 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8139894769421232 [2022-07-21 08:51:13,085 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2630 transitions. [2022-07-21 08:51:13,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2630 transitions. [2022-07-21 08:51:13,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:13,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2630 transitions. [2022-07-21 08:51:13,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 292.22222222222223) internal successors, (2630), 9 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:13,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:13,099 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:13,099 INFO L186 Difference]: Start difference. First operand has 309 places, 306 transitions, 666 flow. Second operand 9 states and 2630 transitions. [2022-07-21 08:51:13,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 316 transitions, 742 flow [2022-07-21 08:51:13,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 316 transitions, 740 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:13,110 INFO L242 Difference]: Finished difference. Result has 319 places, 312 transitions, 714 flow [2022-07-21 08:51:13,111 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=714, PETRI_PLACES=319, PETRI_TRANSITIONS=312} [2022-07-21 08:51:13,112 INFO L279 CegarLoopForPetriNet]: 307 programPoint places, 12 predicate places. [2022-07-21 08:51:13,113 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 312 transitions, 714 flow [2022-07-21 08:51:13,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 291.3) internal successors, (2913), 10 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:13,114 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:13,114 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:13,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:13,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-21 08:51:13,340 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:13,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:13,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1899333219, now seen corresponding path program 1 times [2022-07-21 08:51:13,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:13,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367762333] [2022-07-21 08:51:13,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:13,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:13,371 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:13,406 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:13,406 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:13,407 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:13,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:13,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 08:51:13,408 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 08:51:13,409 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:13,409 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-21 08:51:13,442 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-21 08:51:13,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 363 places, 427 transitions, 914 flow [2022-07-21 08:51:13,718 INFO L129 PetriNetUnfolder]: 175/1102 cut-off events. [2022-07-21 08:51:13,718 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-21 08:51:13,747 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1213 conditions, 1102 events. 175/1102 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 5413 event pairs, 23 based on Foata normal form. 0/937 useless extension candidates. Maximal degree in co-relation 773. Up to 80 conditions per place. [2022-07-21 08:51:13,748 INFO L82 GeneralOperation]: Start removeDead. Operand has 363 places, 427 transitions, 914 flow [2022-07-21 08:51:13,766 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 363 places, 427 transitions, 914 flow [2022-07-21 08:51:13,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:13,768 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1cd1eb57, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@57047864 [2022-07-21 08:51:13,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:13,776 INFO L129 PetriNetUnfolder]: 3/95 cut-off events. [2022-07-21 08:51:13,777 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:51:13,777 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:13,777 INFO L200 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] [2022-07-21 08:51:13,777 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:13,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:13,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1060861606, now seen corresponding path program 1 times [2022-07-21 08:51:13,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:13,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50206870] [2022-07-21 08:51:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:13,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:13,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:13,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50206870] [2022-07-21 08:51:13,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50206870] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:13,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:13,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:13,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145404892] [2022-07-21 08:51:13,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:13,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:13,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:13,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:13,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:13,811 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 427 [2022-07-21 08:51:13,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 427 transitions, 914 flow. Second operand has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:13,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:13,813 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 427 [2022-07-21 08:51:13,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:14,170 INFO L129 PetriNetUnfolder]: 58/959 cut-off events. [2022-07-21 08:51:14,170 INFO L130 PetriNetUnfolder]: For 342/609 co-relation queries the response was YES. [2022-07-21 08:51:14,190 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1185 conditions, 959 events. 58/959 cut-off events. For 342/609 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4917 event pairs, 23 based on Foata normal form. 1464/2376 useless extension candidates. Maximal degree in co-relation 723. Up to 110 conditions per place. [2022-07-21 08:51:14,195 INFO L132 encePairwiseOnDemand]: 359/427 looper letters, 19 selfloop transitions, 2 changer transitions 0/365 dead transitions. [2022-07-21 08:51:14,195 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 365 transitions, 832 flow [2022-07-21 08:51:14,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:14,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:14,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1132 transitions. [2022-07-21 08:51:14,199 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8836846213895394 [2022-07-21 08:51:14,199 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1132 transitions. [2022-07-21 08:51:14,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1132 transitions. [2022-07-21 08:51:14,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:14,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1132 transitions. [2022-07-21 08:51:14,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 377.3333333333333) internal successors, (1132), 3 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,205 INFO L186 Difference]: Start difference. First operand has 363 places, 427 transitions, 914 flow. Second operand 3 states and 1132 transitions. [2022-07-21 08:51:14,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 365 transitions, 832 flow [2022-07-21 08:51:14,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 365 transitions, 832 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:14,213 INFO L242 Difference]: Finished difference. Result has 365 places, 362 transitions, 794 flow [2022-07-21 08:51:14,214 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=794, PETRI_PLACES=365, PETRI_TRANSITIONS=362} [2022-07-21 08:51:14,215 INFO L279 CegarLoopForPetriNet]: 363 programPoint places, 2 predicate places. [2022-07-21 08:51:14,215 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 362 transitions, 794 flow [2022-07-21 08:51:14,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,216 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:14,216 INFO L200 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] [2022-07-21 08:51:14,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 08:51:14,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:14,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:14,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1396972570, now seen corresponding path program 1 times [2022-07-21 08:51:14,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:14,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41316484] [2022-07-21 08:51:14,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:14,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:14,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:14,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41316484] [2022-07-21 08:51:14,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41316484] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:14,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947022499] [2022-07-21 08:51:14,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:14,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:14,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:14,274 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) [2022-07-21 08:51:14,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 08:51:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:14,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:14,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:14,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:14,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947022499] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:14,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:14,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:14,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978944465] [2022-07-21 08:51:14,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:14,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:14,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:14,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:14,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:14,475 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 427 [2022-07-21 08:51:14,478 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 362 transitions, 794 flow. Second operand has 10 states, 10 states have (on average 345.3) internal successors, (3453), 10 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,479 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:14,479 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 427 [2022-07-21 08:51:14,479 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:14,808 INFO L129 PetriNetUnfolder]: 56/917 cut-off events. [2022-07-21 08:51:14,808 INFO L130 PetriNetUnfolder]: For 315/452 co-relation queries the response was YES. [2022-07-21 08:51:14,825 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1158 conditions, 917 events. 56/917 cut-off events. For 315/452 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4457 event pairs, 27 based on Foata normal form. 5/882 useless extension candidates. Maximal degree in co-relation 1091. Up to 91 conditions per place. [2022-07-21 08:51:14,829 INFO L132 encePairwiseOnDemand]: 421/427 looper letters, 20 selfloop transitions, 9 changer transitions 0/372 dead transitions. [2022-07-21 08:51:14,830 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 372 transitions, 874 flow [2022-07-21 08:51:14,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:14,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:14,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3118 transitions. [2022-07-21 08:51:14,837 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8113453031485819 [2022-07-21 08:51:14,837 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3118 transitions. [2022-07-21 08:51:14,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3118 transitions. [2022-07-21 08:51:14,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:14,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3118 transitions. [2022-07-21 08:51:14,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 346.44444444444446) internal successors, (3118), 9 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 427.0) internal successors, (4270), 10 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,864 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 427.0) internal successors, (4270), 10 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,865 INFO L186 Difference]: Start difference. First operand has 365 places, 362 transitions, 794 flow. Second operand 9 states and 3118 transitions. [2022-07-21 08:51:14,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 372 transitions, 874 flow [2022-07-21 08:51:14,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 372 transitions, 872 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:14,872 INFO L242 Difference]: Finished difference. Result has 375 places, 368 transitions, 842 flow [2022-07-21 08:51:14,873 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=842, PETRI_PLACES=375, PETRI_TRANSITIONS=368} [2022-07-21 08:51:14,874 INFO L279 CegarLoopForPetriNet]: 363 programPoint places, 12 predicate places. [2022-07-21 08:51:14,875 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 368 transitions, 842 flow [2022-07-21 08:51:14,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 345.3) internal successors, (3453), 10 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,876 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:14,877 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:14,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:15,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:15,092 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:15,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:15,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1716561117, now seen corresponding path program 1 times [2022-07-21 08:51:15,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:15,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192910692] [2022-07-21 08:51:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:15,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:15,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-21 08:51:15,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:15,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192910692] [2022-07-21 08:51:15,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192910692] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:15,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:15,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:51:15,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126800288] [2022-07-21 08:51:15,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:15,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:51:15,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:15,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:51:15,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:51:15,166 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 427 [2022-07-21 08:51:15,167 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 368 transitions, 842 flow. Second operand has 5 states, 5 states have (on average 306.6) internal successors, (1533), 5 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:15,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:15,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 427 [2022-07-21 08:51:15,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand