./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/stack-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/pthread/stack-1.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 a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 09:58:50,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 09:58:50,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 09:58:50,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 09:58:50,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 09:58:50,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 09:58:50,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 09:58:50,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 09:58:50,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 09:58:50,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 09:58:50,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 09:58:50,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 09:58:50,744 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 09:58:50,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 09:58:50,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 09:58:50,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 09:58:50,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 09:58:50,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 09:58:50,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 09:58:50,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 09:58:50,762 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 09:58:50,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 09:58:50,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 09:58:50,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 09:58:50,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 09:58:50,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 09:58:50,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 09:58:50,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 09:58:50,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 09:58:50,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 09:58:50,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 09:58:50,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 09:58:50,777 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 09:58:50,777 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 09:58:50,778 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 09:58:50,780 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 09:58:50,780 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 09:58:50,780 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 09:58:50,781 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 09:58:50,781 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 09:58:50,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 09:58:50,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 09:58:50,784 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 09:58:50,813 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 09:58:50,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 09:58:50,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 09:58:50,815 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 09:58:50,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 09:58:50,815 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 09:58:50,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 09:58:50,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 09:58:50,816 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 09:58:50,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 09:58:50,817 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 09:58:50,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 09:58:50,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 09:58:50,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 09:58:50,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 09:58:50,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 09:58:50,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 09:58:50,819 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 09:58:50,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 09:58:50,820 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 09:58:50,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 09:58:50,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 09:58:50,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 09:58:50,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 09:58:50,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 09:58:50,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 09:58:50,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 09:58:50,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 09:58:50,822 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 09:58:50,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 09:58:50,822 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 09:58:50,823 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 09:58:50,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 09:58:50,823 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 [2022-07-12 09:58:51,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 09:58:51,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 09:58:51,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 09:58:51,071 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 09:58:51,075 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 09:58:51,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack-1.i [2022-07-12 09:58:51,139 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3caf8e8ce/da78e19e564c47f7b77ac6c7e4af9238/FLAGfe444594f [2022-07-12 09:58:51,657 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 09:58:51,657 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack-1.i [2022-07-12 09:58:51,684 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3caf8e8ce/da78e19e564c47f7b77ac6c7e4af9238/FLAGfe444594f [2022-07-12 09:58:52,116 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3caf8e8ce/da78e19e564c47f7b77ac6c7e4af9238 [2022-07-12 09:58:52,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 09:58:52,119 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 09:58:52,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 09:58:52,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 09:58:52,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 09:58:52,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 09:58:52" (1/1) ... [2022-07-12 09:58:52,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4be4e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:58:52, skipping insertion in model container [2022-07-12 09:58:52,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 09:58:52" (1/1) ... [2022-07-12 09:58:52,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 09:58:52,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 09:58:52,481 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/pthread/stack-1.i[41520,41533] [2022-07-12 09:58:52,511 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 09:58:52,523 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 09:58:52,551 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/pthread/stack-1.i[41520,41533] [2022-07-12 09:58:52,559 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 09:58:52,602 INFO L208 MainTranslator]: Completed translation [2022-07-12 09:58:52,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:58:52 WrapperNode [2022-07-12 09:58:52,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 09:58:52,603 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 09:58:52,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 09:58:52,604 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 09:58:52,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:58:52" (1/1) ... [2022-07-12 09:58:52,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:58:52" (1/1) ... [2022-07-12 09:58:52,651 INFO L137 Inliner]: procedures = 277, calls = 45, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 154 [2022-07-12 09:58:52,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 09:58:52,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 09:58:52,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 09:58:52,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 09:58:52,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:58:52" (1/1) ... [2022-07-12 09:58:52,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:58:52" (1/1) ... [2022-07-12 09:58:52,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:58:52" (1/1) ... [2022-07-12 09:58:52,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:58:52" (1/1) ... [2022-07-12 09:58:52,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:58:52" (1/1) ... [2022-07-12 09:58:52,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:58:52" (1/1) ... [2022-07-12 09:58:52,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:58:52" (1/1) ... [2022-07-12 09:58:52,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 09:58:52,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 09:58:52,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 09:58:52,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 09:58:52,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:58:52" (1/1) ... [2022-07-12 09:58:52,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 09:58:52,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:58:52,733 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) [2022-07-12 09:58:52,744 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 [2022-07-12 09:58:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-07-12 09:58:52,781 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-07-12 09:58:52,781 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-07-12 09:58:52,781 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-07-12 09:58:52,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 09:58:52,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 09:58:52,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 09:58:52,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 09:58:52,782 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-12 09:58:52,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 09:58:52,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 09:58:52,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 09:58:52,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 09:58:52,784 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 09:58:52,949 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 09:58:52,950 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 09:58:53,247 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 09:58:53,255 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 09:58:53,258 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 09:58:53,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:58:53 BoogieIcfgContainer [2022-07-12 09:58:53,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 09:58:53,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 09:58:53,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 09:58:53,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 09:58:53,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 09:58:52" (1/3) ... [2022-07-12 09:58:53,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd5e1b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 09:58:53, skipping insertion in model container [2022-07-12 09:58:53,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:58:52" (2/3) ... [2022-07-12 09:58:53,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd5e1b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 09:58:53, skipping insertion in model container [2022-07-12 09:58:53,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:58:53" (3/3) ... [2022-07-12 09:58:53,269 INFO L111 eAbstractionObserver]: Analyzing ICFG stack-1.i [2022-07-12 09:58:53,274 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 09:58:53,282 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 09:58:53,282 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-12 09:58:53,283 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 09:58:53,374 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 09:58:53,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 173 places, 176 transitions, 368 flow [2022-07-12 09:58:53,503 INFO L129 PetriNetUnfolder]: 10/174 cut-off events. [2022-07-12 09:58:53,504 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 09:58:53,510 INFO L84 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 174 events. 10/174 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 418 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-07-12 09:58:53,510 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 176 transitions, 368 flow [2022-07-12 09:58:53,519 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 164 transitions, 337 flow [2022-07-12 09:58:53,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 09:58:53,544 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@3628df83, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@59cf809d [2022-07-12 09:58:53,545 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-12 09:58:53,587 INFO L129 PetriNetUnfolder]: 5/130 cut-off events. [2022-07-12 09:58:53,588 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 09:58:53,588 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:58:53,589 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, 1, 1, 1] [2022-07-12 09:58:53,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:58:53,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:58:53,595 INFO L85 PathProgramCache]: Analyzing trace with hash -211887483, now seen corresponding path program 1 times [2022-07-12 09:58:53,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:58:53,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879673435] [2022-07-12 09:58:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:58:53,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:58:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:58:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:58:53,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:58:53,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879673435] [2022-07-12 09:58:53,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879673435] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:58:53,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:58:53,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:58:53,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606971903] [2022-07-12 09:58:53,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:58:53,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:58:53,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:58:53,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:58:53,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:58:53,992 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 176 [2022-07-12 09:58:53,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 164 transitions, 337 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:53,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:58:53,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 176 [2022-07-12 09:58:53,998 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:58:54,166 INFO L129 PetriNetUnfolder]: 88/703 cut-off events. [2022-07-12 09:58:54,167 INFO L130 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-07-12 09:58:54,172 INFO L84 FinitePrefix]: Finished finitePrefix Result has 886 conditions, 703 events. 88/703 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3110 event pairs, 32 based on Foata normal form. 69/706 useless extension candidates. Maximal degree in co-relation 747. Up to 111 conditions per place. [2022-07-12 09:58:54,177 INFO L132 encePairwiseOnDemand]: 166/176 looper letters, 20 selfloop transitions, 3 changer transitions 0/162 dead transitions. [2022-07-12 09:58:54,177 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 162 transitions, 385 flow [2022-07-12 09:58:54,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:58:54,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 09:58:54,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2022-07-12 09:58:54,199 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9299242424242424 [2022-07-12 09:58:54,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2022-07-12 09:58:54,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2022-07-12 09:58:54,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:58:54,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2022-07-12 09:58:54,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:54,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:54,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:54,227 INFO L186 Difference]: Start difference. First operand has 161 places, 164 transitions, 337 flow. Second operand 3 states and 491 transitions. [2022-07-12 09:58:54,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 162 transitions, 385 flow [2022-07-12 09:58:54,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 162 transitions, 377 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-12 09:58:54,237 INFO L242 Difference]: Finished difference. Result has 157 places, 156 transitions, 331 flow [2022-07-12 09:58:54,239 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=331, PETRI_PLACES=157, PETRI_TRANSITIONS=156} [2022-07-12 09:58:54,243 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, -4 predicate places. [2022-07-12 09:58:54,243 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 156 transitions, 331 flow [2022-07-12 09:58:54,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:54,245 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:58:54,245 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:58:54,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 09:58:54,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:58:54,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:58:54,246 INFO L85 PathProgramCache]: Analyzing trace with hash 2060462298, now seen corresponding path program 1 times [2022-07-12 09:58:54,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:58:54,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468377196] [2022-07-12 09:58:54,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:58:54,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:58:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:58:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:58:54,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:58:54,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468377196] [2022-07-12 09:58:54,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468377196] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:58:54,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:58:54,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 09:58:54,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740774378] [2022-07-12 09:58:54,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:58:54,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 09:58:54,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:58:54,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 09:58:54,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 09:58:54,385 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 176 [2022-07-12 09:58:54,385 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 156 transitions, 331 flow. Second operand has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:54,386 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:58:54,386 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 176 [2022-07-12 09:58:54,386 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:58:54,518 INFO L129 PetriNetUnfolder]: 34/594 cut-off events. [2022-07-12 09:58:54,519 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-12 09:58:54,522 INFO L84 FinitePrefix]: Finished finitePrefix Result has 715 conditions, 594 events. 34/594 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2037 event pairs, 11 based on Foata normal form. 0/557 useless extension candidates. Maximal degree in co-relation 411. Up to 45 conditions per place. [2022-07-12 09:58:54,525 INFO L132 encePairwiseOnDemand]: 171/176 looper letters, 16 selfloop transitions, 4 changer transitions 0/164 dead transitions. [2022-07-12 09:58:54,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 164 transitions, 392 flow [2022-07-12 09:58:54,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 09:58:54,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 09:58:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 645 transitions. [2022-07-12 09:58:54,528 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9161931818181818 [2022-07-12 09:58:54,528 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 645 transitions. [2022-07-12 09:58:54,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 645 transitions. [2022-07-12 09:58:54,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:58:54,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 645 transitions. [2022-07-12 09:58:54,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:54,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:54,533 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:54,533 INFO L186 Difference]: Start difference. First operand has 157 places, 156 transitions, 331 flow. Second operand 4 states and 645 transitions. [2022-07-12 09:58:54,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 164 transitions, 392 flow [2022-07-12 09:58:54,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 164 transitions, 389 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 09:58:54,540 INFO L242 Difference]: Finished difference. Result has 161 places, 159 transitions, 356 flow [2022-07-12 09:58:54,541 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=356, PETRI_PLACES=161, PETRI_TRANSITIONS=159} [2022-07-12 09:58:54,541 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 0 predicate places. [2022-07-12 09:58:54,541 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 159 transitions, 356 flow [2022-07-12 09:58:54,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:54,542 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:58:54,543 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:58:54,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 09:58:54,544 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:58:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:58:54,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1664854431, now seen corresponding path program 1 times [2022-07-12 09:58:54,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:58:54,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69391319] [2022-07-12 09:58:54,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:58:54,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:58:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:58:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:58:54,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:58:54,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69391319] [2022-07-12 09:58:54,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69391319] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:58:54,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:58:54,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:58:54,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599908044] [2022-07-12 09:58:54,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:58:54,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:58:54,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:58:54,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:58:54,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:58:54,652 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 176 [2022-07-12 09:58:54,654 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 159 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:54,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:58:54,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 176 [2022-07-12 09:58:54,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:58:54,890 INFO L129 PetriNetUnfolder]: 127/1271 cut-off events. [2022-07-12 09:58:54,890 INFO L130 PetriNetUnfolder]: For 90/100 co-relation queries the response was YES. [2022-07-12 09:58:54,896 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1676 conditions, 1271 events. 127/1271 cut-off events. For 90/100 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6938 event pairs, 33 based on Foata normal form. 12/1209 useless extension candidates. Maximal degree in co-relation 1334. Up to 135 conditions per place. [2022-07-12 09:58:54,902 INFO L132 encePairwiseOnDemand]: 170/176 looper letters, 25 selfloop transitions, 4 changer transitions 0/171 dead transitions. [2022-07-12 09:58:54,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 171 transitions, 447 flow [2022-07-12 09:58:54,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:58:54,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 09:58:54,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2022-07-12 09:58:54,904 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9204545454545454 [2022-07-12 09:58:54,905 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2022-07-12 09:58:54,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2022-07-12 09:58:54,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:58:54,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2022-07-12 09:58:54,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:54,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:54,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:54,908 INFO L186 Difference]: Start difference. First operand has 161 places, 159 transitions, 356 flow. Second operand 3 states and 486 transitions. [2022-07-12 09:58:54,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 171 transitions, 447 flow [2022-07-12 09:58:54,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 171 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 09:58:54,916 INFO L242 Difference]: Finished difference. Result has 164 places, 163 transitions, 396 flow [2022-07-12 09:58:54,917 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=396, PETRI_PLACES=164, PETRI_TRANSITIONS=163} [2022-07-12 09:58:54,918 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 3 predicate places. [2022-07-12 09:58:54,919 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 163 transitions, 396 flow [2022-07-12 09:58:54,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:54,919 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:58:54,920 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:58:54,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 09:58:54,920 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:58:54,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:58:54,921 INFO L85 PathProgramCache]: Analyzing trace with hash 172146190, now seen corresponding path program 1 times [2022-07-12 09:58:54,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:58:54,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970442709] [2022-07-12 09:58:54,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:58:54,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:58:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:58:55,054 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:58:55,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:58:55,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970442709] [2022-07-12 09:58:55,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970442709] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:58:55,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815957003] [2022-07-12 09:58:55,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:58:55,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:58:55,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:58:55,062 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) [2022-07-12 09:58:55,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 09:58:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:58:55,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 09:58:55,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:58:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:58:55,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:58:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:58:55,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815957003] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:58:55,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:58:55,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 09:58:55,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513175234] [2022-07-12 09:58:55,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:58:55,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 09:58:55,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:58:55,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 09:58:55,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 09:58:55,481 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 176 [2022-07-12 09:58:55,483 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 163 transitions, 396 flow. Second operand has 10 states, 10 states have (on average 152.5) internal successors, (1525), 10 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:55,483 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:58:55,483 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 176 [2022-07-12 09:58:55,484 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:58:56,002 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([473] L1009-->L1009-1: Formula: (not (< 0 v_~top~0_13)) InVars {~top~0=v_~top~0_13} OutVars{~top~0=v_~top~0_13} AuxVars[] AssignedVars[][182], [Black: 192#(<= 1 ~top~0), Black: 178#(= ~top~0 0), 33#L946-2true, 190#true, 86#L1009-1true, 31#L1023-4true, 234#(<= ~top~0 0), Black: 183#(= |t1Thread1of1ForFork0_push_#res#1| 0), Black: 186#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret42#1| 0)), t2Thread1of1ForFork1InUse]) [2022-07-12 09:58:56,003 INFO L384 tUnfolder$Statistics]: this new event has 189 ancestors and is cut-off event [2022-07-12 09:58:56,005 INFO L387 tUnfolder$Statistics]: existing Event has 161 ancestors and is cut-off event [2022-07-12 09:58:56,005 INFO L387 tUnfolder$Statistics]: existing Event has 168 ancestors and is cut-off event [2022-07-12 09:58:56,006 INFO L387 tUnfolder$Statistics]: existing Event has 169 ancestors and is cut-off event [2022-07-12 09:58:56,006 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([472] L1009-->L1011: Formula: (< 0 v_~top~0_7) InVars {~top~0=v_~top~0_7} OutVars{~top~0=v_~top~0_7} AuxVars[] AssignedVars[][183], [116#L1011true, Black: 190#true, Black: 178#(= ~top~0 0), 33#L946-2true, 192#(<= 1 ~top~0), 31#L1023-4true, Black: 183#(= |t1Thread1of1ForFork0_push_#res#1| 0), Black: 186#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret42#1| 0)), 196#true, t2Thread1of1ForFork1InUse]) [2022-07-12 09:58:56,006 INFO L384 tUnfolder$Statistics]: this new event has 189 ancestors and is cut-off event [2022-07-12 09:58:56,006 INFO L387 tUnfolder$Statistics]: existing Event has 161 ancestors and is cut-off event [2022-07-12 09:58:56,007 INFO L387 tUnfolder$Statistics]: existing Event has 168 ancestors and is cut-off event [2022-07-12 09:58:56,007 INFO L387 tUnfolder$Statistics]: existing Event has 169 ancestors and is cut-off event [2022-07-12 09:58:56,104 INFO L129 PetriNetUnfolder]: 387/3002 cut-off events. [2022-07-12 09:58:56,104 INFO L130 PetriNetUnfolder]: For 1007/1065 co-relation queries the response was YES. [2022-07-12 09:58:56,118 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4482 conditions, 3002 events. 387/3002 cut-off events. For 1007/1065 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 21717 event pairs, 43 based on Foata normal form. 40/2882 useless extension candidates. Maximal degree in co-relation 3942. Up to 300 conditions per place. [2022-07-12 09:58:56,128 INFO L132 encePairwiseOnDemand]: 167/176 looper letters, 86 selfloop transitions, 46 changer transitions 1/273 dead transitions. [2022-07-12 09:58:56,128 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 273 transitions, 1078 flow [2022-07-12 09:58:56,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 09:58:56,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-12 09:58:56,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2831 transitions. [2022-07-12 09:58:56,134 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8936237373737373 [2022-07-12 09:58:56,135 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2831 transitions. [2022-07-12 09:58:56,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2831 transitions. [2022-07-12 09:58:56,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:58:56,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2831 transitions. [2022-07-12 09:58:56,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 157.27777777777777) internal successors, (2831), 18 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:56,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:56,150 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:56,150 INFO L186 Difference]: Start difference. First operand has 164 places, 163 transitions, 396 flow. Second operand 18 states and 2831 transitions. [2022-07-12 09:58:56,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 273 transitions, 1078 flow [2022-07-12 09:58:56,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 273 transitions, 1016 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-07-12 09:58:56,158 INFO L242 Difference]: Finished difference. Result has 185 places, 218 transitions, 767 flow [2022-07-12 09:58:56,159 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=767, PETRI_PLACES=185, PETRI_TRANSITIONS=218} [2022-07-12 09:58:56,159 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 24 predicate places. [2022-07-12 09:58:56,160 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 218 transitions, 767 flow [2022-07-12 09:58:56,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 152.5) internal successors, (1525), 10 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:56,160 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:58:56,161 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:58:56,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 09:58:56,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:58:56,384 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:58:56,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:58:56,384 INFO L85 PathProgramCache]: Analyzing trace with hash 754166100, now seen corresponding path program 1 times [2022-07-12 09:58:56,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:58:56,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333325500] [2022-07-12 09:58:56,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:58:56,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:58:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:58:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:58:56,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:58:56,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333325500] [2022-07-12 09:58:56,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333325500] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:58:56,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:58:56,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:58:56,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392259962] [2022-07-12 09:58:56,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:58:56,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:58:56,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:58:56,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:58:56,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:58:56,462 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 176 [2022-07-12 09:58:56,462 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 218 transitions, 767 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:56,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:58:56,463 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 176 [2022-07-12 09:58:56,463 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:58:56,600 INFO L129 PetriNetUnfolder]: 54/1111 cut-off events. [2022-07-12 09:58:56,600 INFO L130 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2022-07-12 09:58:56,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 1111 events. 54/1111 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4843 event pairs, 9 based on Foata normal form. 18/1086 useless extension candidates. Maximal degree in co-relation 1132. Up to 51 conditions per place. [2022-07-12 09:58:56,608 INFO L132 encePairwiseOnDemand]: 172/176 looper letters, 12 selfloop transitions, 4 changer transitions 0/177 dead transitions. [2022-07-12 09:58:56,608 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 177 transitions, 544 flow [2022-07-12 09:58:56,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:58:56,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 09:58:56,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2022-07-12 09:58:56,610 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9090909090909091 [2022-07-12 09:58:56,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2022-07-12 09:58:56,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2022-07-12 09:58:56,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:58:56,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2022-07-12 09:58:56,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:56,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:56,637 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:56,638 INFO L186 Difference]: Start difference. First operand has 185 places, 218 transitions, 767 flow. Second operand 3 states and 480 transitions. [2022-07-12 09:58:56,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 177 transitions, 544 flow [2022-07-12 09:58:56,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 177 transitions, 522 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-07-12 09:58:56,644 INFO L242 Difference]: Finished difference. Result has 175 places, 175 transitions, 491 flow [2022-07-12 09:58:56,645 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=491, PETRI_PLACES=175, PETRI_TRANSITIONS=175} [2022-07-12 09:58:56,647 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 14 predicate places. [2022-07-12 09:58:56,647 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 175 transitions, 491 flow [2022-07-12 09:58:56,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:56,648 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:58:56,648 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:58:56,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 09:58:56,649 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:58:56,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:58:56,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2063782862, now seen corresponding path program 1 times [2022-07-12 09:58:56,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:58:56,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538908797] [2022-07-12 09:58:56,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:58:56,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:58:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:58:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:58:57,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:58:57,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538908797] [2022-07-12 09:58:57,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538908797] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:58:57,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:58:57,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-07-12 09:58:57,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270234209] [2022-07-12 09:58:57,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:58:57,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 09:58:57,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:58:57,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 09:58:57,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-07-12 09:58:57,416 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 176 [2022-07-12 09:58:57,418 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 175 transitions, 491 flow. Second operand has 24 states, 24 states have (on average 99.54166666666667) internal successors, (2389), 24 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:58:57,418 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:58:57,418 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 176 [2022-07-12 09:58:57,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:00,765 INFO L129 PetriNetUnfolder]: 1122/4498 cut-off events. [2022-07-12 09:59:00,765 INFO L130 PetriNetUnfolder]: For 906/906 co-relation queries the response was YES. [2022-07-12 09:59:00,782 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8480 conditions, 4498 events. 1122/4498 cut-off events. For 906/906 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 31947 event pairs, 173 based on Foata normal form. 20/4368 useless extension candidates. Maximal degree in co-relation 5128. Up to 1458 conditions per place. [2022-07-12 09:59:00,798 INFO L132 encePairwiseOnDemand]: 139/176 looper letters, 249 selfloop transitions, 59 changer transitions 33/427 dead transitions. [2022-07-12 09:59:00,798 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 427 transitions, 1859 flow [2022-07-12 09:59:00,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-12 09:59:00,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-07-12 09:59:00,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4579 transitions. [2022-07-12 09:59:00,809 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5912964876033058 [2022-07-12 09:59:00,809 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4579 transitions. [2022-07-12 09:59:00,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4579 transitions. [2022-07-12 09:59:00,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:00,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4579 transitions. [2022-07-12 09:59:00,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 104.06818181818181) internal successors, (4579), 44 states have internal predecessors, (4579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:00,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 176.0) internal successors, (7920), 45 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:00,838 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 176.0) internal successors, (7920), 45 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:00,839 INFO L186 Difference]: Start difference. First operand has 175 places, 175 transitions, 491 flow. Second operand 44 states and 4579 transitions. [2022-07-12 09:59:00,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 427 transitions, 1859 flow [2022-07-12 09:59:00,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 427 transitions, 1855 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 09:59:00,852 INFO L242 Difference]: Finished difference. Result has 256 places, 230 transitions, 974 flow [2022-07-12 09:59:00,852 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=974, PETRI_PLACES=256, PETRI_TRANSITIONS=230} [2022-07-12 09:59:00,855 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 95 predicate places. [2022-07-12 09:59:00,855 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 230 transitions, 974 flow [2022-07-12 09:59:00,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 99.54166666666667) internal successors, (2389), 24 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:00,859 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:00,859 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:00,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 09:59:00,860 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:59:00,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:00,861 INFO L85 PathProgramCache]: Analyzing trace with hash -373448104, now seen corresponding path program 2 times [2022-07-12 09:59:00,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:00,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864916606] [2022-07-12 09:59:00,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:00,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:01,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:01,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864916606] [2022-07-12 09:59:01,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864916606] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:59:01,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:59:01,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-07-12 09:59:01,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395993497] [2022-07-12 09:59:01,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:59:01,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 09:59:01,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:01,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 09:59:01,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-07-12 09:59:01,891 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 176 [2022-07-12 09:59:01,893 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 230 transitions, 974 flow. Second operand has 28 states, 28 states have (on average 85.53571428571429) internal successors, (2395), 28 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:01,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:01,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 176 [2022-07-12 09:59:01,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:05,685 INFO L129 PetriNetUnfolder]: 1758/7110 cut-off events. [2022-07-12 09:59:05,686 INFO L130 PetriNetUnfolder]: For 5414/5417 co-relation queries the response was YES. [2022-07-12 09:59:05,751 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16637 conditions, 7110 events. 1758/7110 cut-off events. For 5414/5417 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 54476 event pairs, 448 based on Foata normal form. 15/6993 useless extension candidates. Maximal degree in co-relation 11020. Up to 2353 conditions per place. [2022-07-12 09:59:05,779 INFO L132 encePairwiseOnDemand]: 138/176 looper letters, 291 selfloop transitions, 61 changer transitions 26/454 dead transitions. [2022-07-12 09:59:05,779 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 454 transitions, 2771 flow [2022-07-12 09:59:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 09:59:05,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-12 09:59:05,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3181 transitions. [2022-07-12 09:59:05,858 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5163961038961039 [2022-07-12 09:59:05,858 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3181 transitions. [2022-07-12 09:59:05,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3181 transitions. [2022-07-12 09:59:05,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:05,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3181 transitions. [2022-07-12 09:59:05,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 90.88571428571429) internal successors, (3181), 35 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:05,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 176.0) internal successors, (6336), 36 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:05,878 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 176.0) internal successors, (6336), 36 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:05,878 INFO L186 Difference]: Start difference. First operand has 256 places, 230 transitions, 974 flow. Second operand 35 states and 3181 transitions. [2022-07-12 09:59:05,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 454 transitions, 2771 flow [2022-07-12 09:59:05,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 454 transitions, 2759 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-07-12 09:59:05,907 INFO L242 Difference]: Finished difference. Result has 304 places, 265 transitions, 1449 flow [2022-07-12 09:59:05,908 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1449, PETRI_PLACES=304, PETRI_TRANSITIONS=265} [2022-07-12 09:59:05,908 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 143 predicate places. [2022-07-12 09:59:05,909 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 265 transitions, 1449 flow [2022-07-12 09:59:05,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 85.53571428571429) internal successors, (2395), 28 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:05,910 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:05,910 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:05,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 09:59:05,911 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:59:05,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:05,912 INFO L85 PathProgramCache]: Analyzing trace with hash 763029134, now seen corresponding path program 3 times [2022-07-12 09:59:05,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:05,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97633716] [2022-07-12 09:59:05,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:05,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:06,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:06,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97633716] [2022-07-12 09:59:06,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97633716] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:59:06,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:59:06,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-07-12 09:59:06,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527339912] [2022-07-12 09:59:06,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:59:06,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 09:59:06,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:06,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 09:59:06,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-07-12 09:59:06,742 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 176 [2022-07-12 09:59:06,744 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 265 transitions, 1449 flow. Second operand has 29 states, 29 states have (on average 85.44827586206897) internal successors, (2478), 29 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:06,744 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:06,744 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 176 [2022-07-12 09:59:06,744 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:10,536 INFO L129 PetriNetUnfolder]: 2029/8293 cut-off events. [2022-07-12 09:59:10,536 INFO L130 PetriNetUnfolder]: For 8659/8662 co-relation queries the response was YES. [2022-07-12 09:59:10,603 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20371 conditions, 8293 events. 2029/8293 cut-off events. For 8659/8662 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 67672 event pairs, 336 based on Foata normal form. 13/8152 useless extension candidates. Maximal degree in co-relation 12386. Up to 2262 conditions per place. [2022-07-12 09:59:10,629 INFO L132 encePairwiseOnDemand]: 140/176 looper letters, 293 selfloop transitions, 77 changer transitions 26/472 dead transitions. [2022-07-12 09:59:10,629 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 472 transitions, 3227 flow [2022-07-12 09:59:10,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-12 09:59:10,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-12 09:59:10,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3098 transitions. [2022-07-12 09:59:10,638 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5177139037433155 [2022-07-12 09:59:10,639 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3098 transitions. [2022-07-12 09:59:10,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3098 transitions. [2022-07-12 09:59:10,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:10,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3098 transitions. [2022-07-12 09:59:10,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 91.11764705882354) internal successors, (3098), 34 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:10,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 176.0) internal successors, (6160), 35 states have internal predecessors, (6160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:10,680 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 176.0) internal successors, (6160), 35 states have internal predecessors, (6160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:10,681 INFO L186 Difference]: Start difference. First operand has 304 places, 265 transitions, 1449 flow. Second operand 34 states and 3098 transitions. [2022-07-12 09:59:10,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 472 transitions, 3227 flow [2022-07-12 09:59:10,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 472 transitions, 3175 flow, removed 7 selfloop flow, removed 14 redundant places. [2022-07-12 09:59:10,731 INFO L242 Difference]: Finished difference. Result has 338 places, 283 transitions, 1836 flow [2022-07-12 09:59:10,732 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1836, PETRI_PLACES=338, PETRI_TRANSITIONS=283} [2022-07-12 09:59:10,733 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 177 predicate places. [2022-07-12 09:59:10,734 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 283 transitions, 1836 flow [2022-07-12 09:59:10,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 85.44827586206897) internal successors, (2478), 29 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:10,735 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:10,735 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:10,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 09:59:10,736 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:59:10,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:10,736 INFO L85 PathProgramCache]: Analyzing trace with hash -870596139, now seen corresponding path program 1 times [2022-07-12 09:59:10,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:10,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202312084] [2022-07-12 09:59:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:10,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:11,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:11,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202312084] [2022-07-12 09:59:11,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202312084] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:59:11,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25791944] [2022-07-12 09:59:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:11,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:59:11,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:59:11,475 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) [2022-07-12 09:59:11,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 09:59:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:11,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-12 09:59:11,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:59:12,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-07-12 09:59:13,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2022-07-12 09:59:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:14,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:59:14,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-07-12 09:59:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 09:59:15,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25791944] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 09:59:15,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 09:59:15,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [26, 26] total 68 [2022-07-12 09:59:15,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897238398] [2022-07-12 09:59:15,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:59:15,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 09:59:15,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:15,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 09:59:15,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4315, Unknown=0, NotChecked=0, Total=4556 [2022-07-12 09:59:15,226 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 176 [2022-07-12 09:59:15,228 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 283 transitions, 1836 flow. Second operand has 22 states, 22 states have (on average 100.63636363636364) internal successors, (2214), 22 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:15,228 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:15,228 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 176 [2022-07-12 09:59:15,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:22,606 INFO L129 PetriNetUnfolder]: 2737/11264 cut-off events. [2022-07-12 09:59:22,606 INFO L130 PetriNetUnfolder]: For 15461/15461 co-relation queries the response was YES. [2022-07-12 09:59:22,698 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28492 conditions, 11264 events. 2737/11264 cut-off events. For 15461/15461 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 100525 event pairs, 405 based on Foata normal form. 8/11055 useless extension candidates. Maximal degree in co-relation 15448. Up to 1518 conditions per place. [2022-07-12 09:59:22,734 INFO L132 encePairwiseOnDemand]: 143/176 looper letters, 281 selfloop transitions, 210 changer transitions 3/580 dead transitions. [2022-07-12 09:59:22,735 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 580 transitions, 4357 flow [2022-07-12 09:59:22,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-12 09:59:22,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-07-12 09:59:22,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 6634 transitions. [2022-07-12 09:59:22,746 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5798951048951049 [2022-07-12 09:59:22,746 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 6634 transitions. [2022-07-12 09:59:22,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 6634 transitions. [2022-07-12 09:59:22,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:22,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 6634 transitions. [2022-07-12 09:59:22,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 102.06153846153846) internal successors, (6634), 65 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:22,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 176.0) internal successors, (11616), 66 states have internal predecessors, (11616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:22,780 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 176.0) internal successors, (11616), 66 states have internal predecessors, (11616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:22,781 INFO L186 Difference]: Start difference. First operand has 338 places, 283 transitions, 1836 flow. Second operand 65 states and 6634 transitions. [2022-07-12 09:59:22,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 580 transitions, 4357 flow [2022-07-12 09:59:22,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 580 transitions, 4291 flow, removed 8 selfloop flow, removed 18 redundant places. [2022-07-12 09:59:22,854 INFO L242 Difference]: Finished difference. Result has 401 places, 402 transitions, 3325 flow [2022-07-12 09:59:22,855 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=3325, PETRI_PLACES=401, PETRI_TRANSITIONS=402} [2022-07-12 09:59:22,856 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 240 predicate places. [2022-07-12 09:59:22,856 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 402 transitions, 3325 flow [2022-07-12 09:59:22,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 100.63636363636364) internal successors, (2214), 22 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:22,857 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:22,857 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:22,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 09:59:23,081 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 [2022-07-12 09:59:23,081 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:59:23,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:23,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1544280769, now seen corresponding path program 2 times [2022-07-12 09:59:23,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:23,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111963812] [2022-07-12 09:59:23,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:23,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:24,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:24,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111963812] [2022-07-12 09:59:24,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111963812] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:59:24,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248117329] [2022-07-12 09:59:24,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 09:59:24,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:59:24,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:59:24,258 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) [2022-07-12 09:59:24,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 09:59:24,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 09:59:24,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 09:59:24,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-12 09:59:24,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:59:24,500 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 09:59:24,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-12 09:59:24,516 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 09:59:24,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 09:59:25,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-07-12 09:59:25,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2022-07-12 09:59:26,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2022-07-12 09:59:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 09:59:26,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:59:26,997 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_244 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_244) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-07-12 09:59:27,027 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 09:59:27,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-07-12 09:59:27,036 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 09:59:27,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-07-12 09:59:27,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-07-12 09:59:28,011 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 09:59:28,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-07-12 09:59:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 1 not checked. [2022-07-12 09:59:28,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248117329] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:59:28,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:59:28,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 26] total 76 [2022-07-12 09:59:28,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193622802] [2022-07-12 09:59:28,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:59:28,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-12 09:59:28,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:28,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-12 09:59:28,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=5275, Unknown=1, NotChecked=146, Total=5700 [2022-07-12 09:59:28,021 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 176 [2022-07-12 09:59:28,025 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 402 transitions, 3325 flow. Second operand has 76 states, 76 states have (on average 86.32894736842105) internal successors, (6561), 76 states have internal predecessors, (6561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:28,025 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:28,025 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 176 [2022-07-12 09:59:28,025 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:00:32,382 INFO L129 PetriNetUnfolder]: 4492/19958 cut-off events. [2022-07-12 10:00:32,382 INFO L130 PetriNetUnfolder]: For 43776/43783 co-relation queries the response was YES. [2022-07-12 10:00:32,635 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57271 conditions, 19958 events. 4492/19958 cut-off events. For 43776/43783 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 202079 event pairs, 457 based on Foata normal form. 44/19639 useless extension candidates. Maximal degree in co-relation 32292. Up to 2318 conditions per place. [2022-07-12 10:00:32,705 INFO L132 encePairwiseOnDemand]: 131/176 looper letters, 736 selfloop transitions, 825 changer transitions 39/1676 dead transitions. [2022-07-12 10:00:32,706 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 656 places, 1676 transitions, 14780 flow [2022-07-12 10:00:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2022-07-12 10:00:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2022-07-12 10:00:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 22286 transitions. [2022-07-12 10:00:32,743 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.49462890625 [2022-07-12 10:00:32,743 INFO L72 ComplementDD]: Start complementDD. Operand 256 states and 22286 transitions. [2022-07-12 10:00:32,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 256 states and 22286 transitions. [2022-07-12 10:00:32,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:00:32,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 256 states and 22286 transitions. [2022-07-12 10:00:32,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 257 states, 256 states have (on average 87.0546875) internal successors, (22286), 256 states have internal predecessors, (22286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:32,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 257 states, 257 states have (on average 176.0) internal successors, (45232), 257 states have internal predecessors, (45232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:32,880 INFO L81 ComplementDD]: Finished complementDD. Result has 257 states, 257 states have (on average 176.0) internal successors, (45232), 257 states have internal predecessors, (45232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:32,880 INFO L186 Difference]: Start difference. First operand has 401 places, 402 transitions, 3325 flow. Second operand 256 states and 22286 transitions. [2022-07-12 10:00:32,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 656 places, 1676 transitions, 14780 flow [2022-07-12 10:00:33,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 1676 transitions, 12911 flow, removed 899 selfloop flow, removed 9 redundant places. [2022-07-12 10:00:33,239 INFO L242 Difference]: Finished difference. Result has 690 places, 1071 transitions, 9996 flow [2022-07-12 10:00:33,240 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=256, PETRI_FLOW=9996, PETRI_PLACES=690, PETRI_TRANSITIONS=1071} [2022-07-12 10:00:33,241 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 529 predicate places. [2022-07-12 10:00:33,241 INFO L495 AbstractCegarLoop]: Abstraction has has 690 places, 1071 transitions, 9996 flow [2022-07-12 10:00:33,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 86.32894736842105) internal successors, (6561), 76 states have internal predecessors, (6561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:33,243 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:00:33,243 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:00:33,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:00:33,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:00:33,458 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:00:33,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:00:33,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1608662003, now seen corresponding path program 1 times [2022-07-12 10:00:33,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:00:33,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636656101] [2022-07-12 10:00:33,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:33,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:00:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:00:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 69 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:00:33,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:00:33,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636656101] [2022-07-12 10:00:33,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636656101] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:00:33,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064878294] [2022-07-12 10:00:33,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:33,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:00:33,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:00:33,559 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:00:33,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:00:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:00:33,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:00:33,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:00:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-12 10:00:33,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:00:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-12 10:00:34,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064878294] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:00:34,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:00:34,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-07-12 10:00:34,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378029904] [2022-07-12 10:00:34,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:00:34,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 10:00:34,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:00:34,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 10:00:34,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-12 10:00:34,061 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 176 [2022-07-12 10:00:34,062 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 1071 transitions, 9996 flow. Second operand has 12 states, 12 states have (on average 151.5) internal successors, (1818), 12 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:34,062 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:00:34,062 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 176 [2022-07-12 10:00:34,062 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:00:39,397 INFO L129 PetriNetUnfolder]: 1397/14428 cut-off events. [2022-07-12 10:00:39,397 INFO L130 PetriNetUnfolder]: For 68989/69094 co-relation queries the response was YES. [2022-07-12 10:00:39,600 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45650 conditions, 14428 events. 1397/14428 cut-off events. For 68989/69094 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 145511 event pairs, 297 based on Foata normal form. 29/14070 useless extension candidates. Maximal degree in co-relation 44938. Up to 1037 conditions per place. [2022-07-12 10:00:39,640 INFO L132 encePairwiseOnDemand]: 166/176 looper letters, 270 selfloop transitions, 200 changer transitions 3/1226 dead transitions. [2022-07-12 10:00:39,640 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 694 places, 1226 transitions, 12472 flow [2022-07-12 10:00:39,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 10:00:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-12 10:00:39,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2756 transitions. [2022-07-12 10:00:39,644 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8699494949494949 [2022-07-12 10:00:39,644 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2756 transitions. [2022-07-12 10:00:39,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2756 transitions. [2022-07-12 10:00:39,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:00:39,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2756 transitions. [2022-07-12 10:00:39,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.11111111111111) internal successors, (2756), 18 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:39,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:39,651 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:39,652 INFO L186 Difference]: Start difference. First operand has 690 places, 1071 transitions, 9996 flow. Second operand 18 states and 2756 transitions. [2022-07-12 10:00:39,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 694 places, 1226 transitions, 12472 flow [2022-07-12 10:00:40,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 664 places, 1226 transitions, 10636 flow, removed 657 selfloop flow, removed 30 redundant places. [2022-07-12 10:00:40,111 INFO L242 Difference]: Finished difference. Result has 672 places, 1126 transitions, 9524 flow [2022-07-12 10:00:40,113 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=8304, PETRI_DIFFERENCE_MINUEND_PLACES=647, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9524, PETRI_PLACES=672, PETRI_TRANSITIONS=1126} [2022-07-12 10:00:40,113 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 511 predicate places. [2022-07-12 10:00:40,114 INFO L495 AbstractCegarLoop]: Abstraction has has 672 places, 1126 transitions, 9524 flow [2022-07-12 10:00:40,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 151.5) internal successors, (1818), 12 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:40,114 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:00:40,114 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-12 10:00:40,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:00:40,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:00:40,315 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:00:40,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:00:40,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1324549368, now seen corresponding path program 2 times [2022-07-12 10:00:40,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:00:40,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944632954] [2022-07-12 10:00:40,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:40,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:00:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:00:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:00:40,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:00:40,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944632954] [2022-07-12 10:00:40,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944632954] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:00:40,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366446367] [2022-07-12 10:00:40,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:00:40,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:00:40,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:00:40,406 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:00:40,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:00:40,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:00:40,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:00:40,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:00:40,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:00:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:00:40,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:00:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:00:40,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366446367] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:00:40,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:00:40,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-07-12 10:00:40,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485975666] [2022-07-12 10:00:40,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:00:40,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 10:00:40,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:00:40,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 10:00:40,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-07-12 10:00:40,958 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 176 [2022-07-12 10:00:40,960 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 1126 transitions, 9524 flow. Second operand has 13 states, 13 states have (on average 152.84615384615384) internal successors, (1987), 13 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:40,960 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:00:40,960 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 176 [2022-07-12 10:00:40,960 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:00:47,727 INFO L129 PetriNetUnfolder]: 1720/18693 cut-off events. [2022-07-12 10:00:47,727 INFO L130 PetriNetUnfolder]: For 93925/94028 co-relation queries the response was YES. [2022-07-12 10:00:48,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56615 conditions, 18693 events. 1720/18693 cut-off events. For 93925/94028 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 196293 event pairs, 367 based on Foata normal form. 56/18266 useless extension candidates. Maximal degree in co-relation 55918. Up to 1525 conditions per place. [2022-07-12 10:00:48,087 INFO L132 encePairwiseOnDemand]: 169/176 looper letters, 356 selfloop transitions, 197 changer transitions 1/1327 dead transitions. [2022-07-12 10:00:48,087 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 1327 transitions, 12592 flow [2022-07-12 10:00:48,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 10:00:48,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-12 10:00:48,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2795 transitions. [2022-07-12 10:00:48,090 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.882260101010101 [2022-07-12 10:00:48,090 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2795 transitions. [2022-07-12 10:00:48,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2795 transitions. [2022-07-12 10:00:48,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:00:48,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2795 transitions. [2022-07-12 10:00:48,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 155.27777777777777) internal successors, (2795), 18 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:48,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:48,097 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:48,097 INFO L186 Difference]: Start difference. First operand has 672 places, 1126 transitions, 9524 flow. Second operand 18 states and 2795 transitions. [2022-07-12 10:00:48,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 1327 transitions, 12592 flow [2022-07-12 10:00:48,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 684 places, 1327 transitions, 12418 flow, removed 77 selfloop flow, removed 5 redundant places. [2022-07-12 10:00:48,656 INFO L242 Difference]: Finished difference. Result has 686 places, 1188 transitions, 10510 flow [2022-07-12 10:00:48,657 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=9382, PETRI_DIFFERENCE_MINUEND_PLACES=667, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=955, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10510, PETRI_PLACES=686, PETRI_TRANSITIONS=1188} [2022-07-12 10:00:48,657 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 525 predicate places. [2022-07-12 10:00:48,657 INFO L495 AbstractCegarLoop]: Abstraction has has 686 places, 1188 transitions, 10510 flow [2022-07-12 10:00:48,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 152.84615384615384) internal successors, (1987), 13 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:48,658 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:00:48,658 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:00:48,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:00:48,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-12 10:00:48,859 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:00:48,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:00:48,859 INFO L85 PathProgramCache]: Analyzing trace with hash 2046476772, now seen corresponding path program 1 times [2022-07-12 10:00:48,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:00:48,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431466423] [2022-07-12 10:00:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:48,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:00:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:00:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:00:49,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:00:49,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431466423] [2022-07-12 10:00:49,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431466423] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:00:49,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160021773] [2022-07-12 10:00:49,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:49,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:00:49,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:00:49,900 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:00:49,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:00:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:00:50,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-12 10:00:50,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:00:50,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-07-12 10:00:51,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:00:51,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 38 [2022-07-12 10:00:53,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2022-07-12 10:00:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:00:53,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:01:19,313 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:01:19,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2022-07-12 10:01:19,321 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:01:19,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2022-07-12 10:01:19,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 42 [2022-07-12 10:01:19,347 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:01:19,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 67 [2022-07-12 10:01:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:01:20,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160021773] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:01:20,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:01:20,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34, 33] total 92 [2022-07-12 10:01:20,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75467926] [2022-07-12 10:01:20,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:01:20,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-12 10:01:20,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:01:20,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-12 10:01:20,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=694, Invalid=7655, Unknown=23, NotChecked=0, Total=8372 [2022-07-12 10:01:20,278 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 176 [2022-07-12 10:01:20,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 686 places, 1188 transitions, 10510 flow. Second operand has 92 states, 92 states have (on average 100.28260869565217) internal successors, (9226), 92 states have internal predecessors, (9226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:01:20,281 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:01:20,281 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 176 [2022-07-12 10:01:20,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:02:18,229 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 10:02:30,666 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)