./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c --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/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:29:54,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:29:54,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:29:54,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:29:54,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:29:54,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:29:54,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:29:54,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:29:54,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:29:54,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:29:54,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:29:54,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:29:54,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:29:54,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:29:54,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:29:54,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:29:54,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:29:54,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:29:54,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:29:54,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:29:54,108 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:29:54,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:29:54,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:29:54,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:29:54,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:29:54,121 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:29:54,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:29:54,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:29:54,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:29:54,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:29:54,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:29:54,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:29:54,126 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:29:54,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:29:54,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:29:54,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:29:54,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:29:54,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:29:54,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:29:54,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:29:54,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:29:54,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:29:54,131 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:29:54,143 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:29:54,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:29:54,144 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:29:54,144 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:29:54,144 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:29:54,144 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:29:54,145 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:29:54,145 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:29:54,145 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:29:54,145 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:29:54,145 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:29:54,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:29:54,146 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:29:54,146 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:29:54,146 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:29:54,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:29:54,146 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:29:54,146 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:29:54,147 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:29:54,147 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:29:54,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:29:54,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:29:54,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:29:54,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:29:54,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:29:54,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:29:54,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:29:54,148 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:29:54,148 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:29:54,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:29:54,148 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:29:54,149 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:29:54,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:29:54,149 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f [2022-07-12 10:29:54,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:29:54,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:29:54,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:29:54,437 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:29:54,438 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:29:54,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-07-12 10:29:54,513 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/663735e8f/adee9c3f725d41878748480e143a786c/FLAG1f272dfcd [2022-07-12 10:29:54,875 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:29:54,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-07-12 10:29:54,882 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/663735e8f/adee9c3f725d41878748480e143a786c/FLAG1f272dfcd [2022-07-12 10:29:55,275 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/663735e8f/adee9c3f725d41878748480e143a786c [2022-07-12 10:29:55,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:29:55,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:29:55,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:29:55,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:29:55,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:29:55,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:29:55" (1/1) ... [2022-07-12 10:29:55,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a5e08e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:55, skipping insertion in model container [2022-07-12 10:29:55,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:29:55" (1/1) ... [2022-07-12 10:29:55,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:29:55,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:29:55,505 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-07-12 10:29:55,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:29:55,522 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:29:55,534 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-07-12 10:29:55,536 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:29:55,546 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:29:55,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:55 WrapperNode [2022-07-12 10:29:55,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:29:55,547 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:29:55,547 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:29:55,547 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:29:55,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:55" (1/1) ... [2022-07-12 10:29:55,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:55" (1/1) ... [2022-07-12 10:29:55,576 INFO L137 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 271 [2022-07-12 10:29:55,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:29:55,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:29:55,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:29:55,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:29:55,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:55" (1/1) ... [2022-07-12 10:29:55,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:55" (1/1) ... [2022-07-12 10:29:55,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:55" (1/1) ... [2022-07-12 10:29:55,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:55" (1/1) ... [2022-07-12 10:29:55,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:55" (1/1) ... [2022-07-12 10:29:55,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:55" (1/1) ... [2022-07-12 10:29:55,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:55" (1/1) ... [2022-07-12 10:29:55,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:29:55,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:29:55,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:29:55,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:29:55,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:55" (1/1) ... [2022-07-12 10:29:55,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:29:55,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:29:55,623 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 10:29:55,639 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 10:29:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:29:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:29:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:29:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:29:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:29:55,650 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:29:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:29:55,650 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:29:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-12 10:29:55,650 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-12 10:29:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:29:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:29:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:29:55,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:29:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:29:55,652 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 10:29:55,710 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:29:55,711 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:29:56,001 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:29:56,010 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:29:56,010 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-12 10:29:56,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:29:56 BoogieIcfgContainer [2022-07-12 10:29:56,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:29:56,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:29:56,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:29:56,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:29:56,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:29:55" (1/3) ... [2022-07-12 10:29:56,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81ccd20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:29:56, skipping insertion in model container [2022-07-12 10:29:56,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:55" (2/3) ... [2022-07-12 10:29:56,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81ccd20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:29:56, skipping insertion in model container [2022-07-12 10:29:56,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:29:56" (3/3) ... [2022-07-12 10:29:56,017 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2022-07-12 10:29:56,021 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:29:56,026 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:29:56,027 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:29:56,027 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:29:56,114 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-12 10:29:56,151 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 349 places, 368 transitions, 760 flow [2022-07-12 10:29:56,270 INFO L129 PetriNetUnfolder]: 29/365 cut-off events. [2022-07-12 10:29:56,271 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:29:56,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 365 events. 29/365 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 515 event pairs, 0 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 239. Up to 2 conditions per place. [2022-07-12 10:29:56,278 INFO L82 GeneralOperation]: Start removeDead. Operand has 349 places, 368 transitions, 760 flow [2022-07-12 10:29:56,286 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 335 places, 354 transitions, 726 flow [2022-07-12 10:29:56,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:29:56,297 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@e102f0a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7b0755bc [2022-07-12 10:29:56,301 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:29:56,357 INFO L129 PetriNetUnfolder]: 28/346 cut-off events. [2022-07-12 10:29:56,357 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:29:56,357 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:56,358 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:56,359 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:29:56,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:56,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1666240478, now seen corresponding path program 1 times [2022-07-12 10:29:56,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:56,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563396698] [2022-07-12 10:29:56,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:56,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:56,590 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 10:29:56,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:56,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563396698] [2022-07-12 10:29:56,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563396698] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:29:56,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:29:56,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:29:56,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311913276] [2022-07-12 10:29:56,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:29:56,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:29:56,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:56,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:29:56,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:29:56,632 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 368 [2022-07-12 10:29:56,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 354 transitions, 726 flow. Second operand has 2 states, 2 states have (on average 343.0) internal successors, (686), 2 states have internal predecessors, (686), 0 states have call successors, (0), 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 10:29:56,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:56,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 368 [2022-07-12 10:29:56,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:56,705 INFO L129 PetriNetUnfolder]: 6/331 cut-off events. [2022-07-12 10:29:56,706 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-12 10:29:56,708 INFO L84 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 331 events. 6/331 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 476 event pairs, 0 based on Foata normal form. 29/337 useless extension candidates. Maximal degree in co-relation 226. Up to 7 conditions per place. [2022-07-12 10:29:56,710 INFO L132 encePairwiseOnDemand]: 345/368 looper letters, 6 selfloop transitions, 0 changer transitions 9/331 dead transitions. [2022-07-12 10:29:56,710 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 331 transitions, 692 flow [2022-07-12 10:29:56,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:29:56,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:29:56,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 705 transitions. [2022-07-12 10:29:56,723 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9578804347826086 [2022-07-12 10:29:56,724 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 705 transitions. [2022-07-12 10:29:56,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 705 transitions. [2022-07-12 10:29:56,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:56,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 705 transitions. [2022-07-12 10:29:56,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 352.5) internal successors, (705), 2 states have internal predecessors, (705), 0 states have call successors, (0), 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 10:29:56,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 368.0) internal successors, (1104), 3 states have internal predecessors, (1104), 0 states have call successors, (0), 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 10:29:56,739 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 368.0) internal successors, (1104), 3 states have internal predecessors, (1104), 0 states have call successors, (0), 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 10:29:56,741 INFO L186 Difference]: Start difference. First operand has 335 places, 354 transitions, 726 flow. Second operand 2 states and 705 transitions. [2022-07-12 10:29:56,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 331 transitions, 692 flow [2022-07-12 10:29:56,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 331 transitions, 680 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-12 10:29:56,753 INFO L242 Difference]: Finished difference. Result has 330 places, 322 transitions, 650 flow [2022-07-12 10:29:56,755 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=650, PETRI_PLACES=330, PETRI_TRANSITIONS=322} [2022-07-12 10:29:56,759 INFO L279 CegarLoopForPetriNet]: 335 programPoint places, -5 predicate places. [2022-07-12 10:29:56,759 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 322 transitions, 650 flow [2022-07-12 10:29:56,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 343.0) internal successors, (686), 2 states have internal predecessors, (686), 0 states have call successors, (0), 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 10:29:56,760 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:56,760 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:56,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:29:56,761 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:29:56,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:56,761 INFO L85 PathProgramCache]: Analyzing trace with hash -596270102, now seen corresponding path program 1 times [2022-07-12 10:29:56,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:56,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346461859] [2022-07-12 10:29:56,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:56,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:57,253 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 10:29:57,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:57,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346461859] [2022-07-12 10:29:57,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346461859] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:29:57,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:29:57,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-12 10:29:57,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798541875] [2022-07-12 10:29:57,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:29:57,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 10:29:57,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:57,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 10:29:57,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-07-12 10:29:57,264 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 368 [2022-07-12 10:29:57,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 322 transitions, 650 flow. Second operand has 12 states, 12 states have (on average 278.5833333333333) internal successors, (3343), 12 states have internal predecessors, (3343), 0 states have call successors, (0), 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 10:29:57,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:57,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 368 [2022-07-12 10:29:57,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:57,940 INFO L129 PetriNetUnfolder]: 189/2612 cut-off events. [2022-07-12 10:29:57,941 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-07-12 10:29:57,950 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3031 conditions, 2612 events. 189/2612 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 19489 event pairs, 34 based on Foata normal form. 1/2422 useless extension candidates. Maximal degree in co-relation 3028. Up to 155 conditions per place. [2022-07-12 10:29:57,958 INFO L132 encePairwiseOnDemand]: 354/368 looper letters, 123 selfloop transitions, 9 changer transitions 20/413 dead transitions. [2022-07-12 10:29:57,958 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 413 transitions, 1148 flow [2022-07-12 10:29:57,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 10:29:57,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-12 10:29:57,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3441 transitions. [2022-07-12 10:29:57,963 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7792119565217391 [2022-07-12 10:29:57,963 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3441 transitions. [2022-07-12 10:29:57,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3441 transitions. [2022-07-12 10:29:57,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:57,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3441 transitions. [2022-07-12 10:29:57,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 286.75) internal successors, (3441), 12 states have internal predecessors, (3441), 0 states have call successors, (0), 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 10:29:57,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 368.0) internal successors, (4784), 13 states have internal predecessors, (4784), 0 states have call successors, (0), 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 10:29:57,977 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 368.0) internal successors, (4784), 13 states have internal predecessors, (4784), 0 states have call successors, (0), 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 10:29:57,977 INFO L186 Difference]: Start difference. First operand has 330 places, 322 transitions, 650 flow. Second operand 12 states and 3441 transitions. [2022-07-12 10:29:57,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 413 transitions, 1148 flow [2022-07-12 10:29:57,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 413 transitions, 1148 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:29:57,983 INFO L242 Difference]: Finished difference. Result has 341 places, 328 transitions, 713 flow [2022-07-12 10:29:57,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=713, PETRI_PLACES=341, PETRI_TRANSITIONS=328} [2022-07-12 10:29:57,984 INFO L279 CegarLoopForPetriNet]: 335 programPoint places, 6 predicate places. [2022-07-12 10:29:57,984 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 328 transitions, 713 flow [2022-07-12 10:29:57,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 278.5833333333333) internal successors, (3343), 12 states have internal predecessors, (3343), 0 states have call successors, (0), 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 10:29:57,986 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:57,986 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:57,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:29:57,987 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:29:57,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:57,989 INFO L85 PathProgramCache]: Analyzing trace with hash 822135892, now seen corresponding path program 1 times [2022-07-12 10:29:57,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:57,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116827881] [2022-07-12 10:29:57,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:57,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:29:58,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:58,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116827881] [2022-07-12 10:29:58,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116827881] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:29:58,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:29:58,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:29:58,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833801029] [2022-07-12 10:29:58,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:29:58,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:29:58,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:58,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:29:58,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:29:58,111 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 368 [2022-07-12 10:29:58,112 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 328 transitions, 713 flow. Second operand has 7 states, 7 states have (on average 295.7142857142857) internal successors, (2070), 7 states have internal predecessors, (2070), 0 states have call successors, (0), 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 10:29:58,113 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:58,113 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 368 [2022-07-12 10:29:58,113 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:58,968 INFO L129 PetriNetUnfolder]: 994/5924 cut-off events. [2022-07-12 10:29:58,969 INFO L130 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-07-12 10:29:58,992 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7857 conditions, 5924 events. 994/5924 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 51023 event pairs, 395 based on Foata normal form. 0/5002 useless extension candidates. Maximal degree in co-relation 7844. Up to 852 conditions per place. [2022-07-12 10:29:59,012 INFO L132 encePairwiseOnDemand]: 349/368 looper letters, 113 selfloop transitions, 28 changer transitions 0/415 dead transitions. [2022-07-12 10:29:59,012 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 415 transitions, 1185 flow [2022-07-12 10:29:59,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:29:59,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:29:59,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3333 transitions. [2022-07-12 10:29:59,018 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8233695652173914 [2022-07-12 10:29:59,018 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3333 transitions. [2022-07-12 10:29:59,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3333 transitions. [2022-07-12 10:29:59,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:59,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3333 transitions. [2022-07-12 10:29:59,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 303.0) internal successors, (3333), 11 states have internal predecessors, (3333), 0 states have call successors, (0), 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 10:29:59,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 368.0) internal successors, (4416), 12 states have internal predecessors, (4416), 0 states have call successors, (0), 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 10:29:59,032 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 368.0) internal successors, (4416), 12 states have internal predecessors, (4416), 0 states have call successors, (0), 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 10:29:59,032 INFO L186 Difference]: Start difference. First operand has 341 places, 328 transitions, 713 flow. Second operand 11 states and 3333 transitions. [2022-07-12 10:29:59,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 415 transitions, 1185 flow [2022-07-12 10:29:59,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 415 transitions, 1171 flow, removed 7 selfloop flow, removed 7 redundant places. [2022-07-12 10:29:59,041 INFO L242 Difference]: Finished difference. Result has 341 places, 345 transitions, 832 flow [2022-07-12 10:29:59,041 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=832, PETRI_PLACES=341, PETRI_TRANSITIONS=345} [2022-07-12 10:29:59,043 INFO L279 CegarLoopForPetriNet]: 335 programPoint places, 6 predicate places. [2022-07-12 10:29:59,043 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 345 transitions, 832 flow [2022-07-12 10:29:59,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 295.7142857142857) internal successors, (2070), 7 states have internal predecessors, (2070), 0 states have call successors, (0), 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 10:29:59,044 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:59,044 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:59,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:29:59,045 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:29:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:59,046 INFO L85 PathProgramCache]: Analyzing trace with hash 2058611184, now seen corresponding path program 1 times [2022-07-12 10:29:59,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:59,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804797945] [2022-07-12 10:29:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:59,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:29:59,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:59,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804797945] [2022-07-12 10:29:59,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804797945] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:29:59,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:29:59,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:29:59,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102504688] [2022-07-12 10:29:59,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:29:59,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:29:59,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:59,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:29:59,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:29:59,143 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 368 [2022-07-12 10:29:59,145 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 345 transitions, 832 flow. Second operand has 7 states, 7 states have (on average 295.7142857142857) internal successors, (2070), 7 states have internal predecessors, (2070), 0 states have call successors, (0), 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 10:29:59,145 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:59,145 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 368 [2022-07-12 10:29:59,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:59,911 INFO L129 PetriNetUnfolder]: 821/5478 cut-off events. [2022-07-12 10:29:59,911 INFO L130 PetriNetUnfolder]: For 564/600 co-relation queries the response was YES. [2022-07-12 10:29:59,926 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7311 conditions, 5478 events. 821/5478 cut-off events. For 564/600 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 46490 event pairs, 507 based on Foata normal form. 36/4847 useless extension candidates. Maximal degree in co-relation 7300. Up to 965 conditions per place. [2022-07-12 10:29:59,938 INFO L132 encePairwiseOnDemand]: 349/368 looper letters, 109 selfloop transitions, 28 changer transitions 0/413 dead transitions. [2022-07-12 10:29:59,938 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 413 transitions, 1274 flow [2022-07-12 10:29:59,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:29:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:29:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3329 transitions. [2022-07-12 10:29:59,943 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8223814229249012 [2022-07-12 10:29:59,943 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3329 transitions. [2022-07-12 10:29:59,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3329 transitions. [2022-07-12 10:29:59,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:59,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3329 transitions. [2022-07-12 10:29:59,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 302.6363636363636) internal successors, (3329), 11 states have internal predecessors, (3329), 0 states have call successors, (0), 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 10:29:59,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 368.0) internal successors, (4416), 12 states have internal predecessors, (4416), 0 states have call successors, (0), 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 10:29:59,953 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 368.0) internal successors, (4416), 12 states have internal predecessors, (4416), 0 states have call successors, (0), 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 10:29:59,953 INFO L186 Difference]: Start difference. First operand has 341 places, 345 transitions, 832 flow. Second operand 11 states and 3329 transitions. [2022-07-12 10:29:59,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 413 transitions, 1274 flow [2022-07-12 10:29:59,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 413 transitions, 1269 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 10:29:59,959 INFO L242 Difference]: Finished difference. Result has 351 places, 347 transitions, 895 flow [2022-07-12 10:29:59,960 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=895, PETRI_PLACES=351, PETRI_TRANSITIONS=347} [2022-07-12 10:29:59,960 INFO L279 CegarLoopForPetriNet]: 335 programPoint places, 16 predicate places. [2022-07-12 10:29:59,961 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 347 transitions, 895 flow [2022-07-12 10:29:59,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 295.7142857142857) internal successors, (2070), 7 states have internal predecessors, (2070), 0 states have call successors, (0), 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 10:29:59,961 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:59,962 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:59,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:29:59,962 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:29:59,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:59,962 INFO L85 PathProgramCache]: Analyzing trace with hash -620391795, now seen corresponding path program 1 times [2022-07-12 10:29:59,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:59,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687067355] [2022-07-12 10:29:59,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:59,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:30:00,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:30:00,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687067355] [2022-07-12 10:30:00,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687067355] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:30:00,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991384952] [2022-07-12 10:30:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:00,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:30:00,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:30:00,044 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 10:30:00,045 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 10:30:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:00,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 10:30:00,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:30:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:30:00,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:30:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:30:00,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991384952] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:30:00,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:30:00,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-12 10:30:00,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924533556] [2022-07-12 10:30:00,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:30:00,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:30:00,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:30:00,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:30:00,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:30:00,477 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 368 [2022-07-12 10:30:00,479 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 347 transitions, 895 flow. Second operand has 7 states, 7 states have (on average 294.0) internal successors, (2058), 7 states have internal predecessors, (2058), 0 states have call successors, (0), 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 10:30:00,479 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:30:00,479 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 368 [2022-07-12 10:30:00,479 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:30:01,769 INFO L129 PetriNetUnfolder]: 1271/9246 cut-off events. [2022-07-12 10:30:01,770 INFO L130 PetriNetUnfolder]: For 1679/1919 co-relation queries the response was YES. [2022-07-12 10:30:01,799 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12456 conditions, 9246 events. 1271/9246 cut-off events. For 1679/1919 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 92702 event pairs, 256 based on Foata normal form. 239/8806 useless extension candidates. Maximal degree in co-relation 12443. Up to 1314 conditions per place. [2022-07-12 10:30:01,819 INFO L132 encePairwiseOnDemand]: 352/368 looper letters, 99 selfloop transitions, 17 changer transitions 0/391 dead transitions. [2022-07-12 10:30:01,819 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 391 transitions, 1251 flow [2022-07-12 10:30:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:30:01,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:30:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2402 transitions. [2022-07-12 10:30:01,823 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8158967391304348 [2022-07-12 10:30:01,823 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2402 transitions. [2022-07-12 10:30:01,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2402 transitions. [2022-07-12 10:30:01,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:30:01,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2402 transitions. [2022-07-12 10:30:01,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 300.25) internal successors, (2402), 8 states have internal predecessors, (2402), 0 states have call successors, (0), 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 10:30:01,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 368.0) internal successors, (3312), 9 states have internal predecessors, (3312), 0 states have call successors, (0), 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 10:30:01,831 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 368.0) internal successors, (3312), 9 states have internal predecessors, (3312), 0 states have call successors, (0), 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 10:30:01,831 INFO L186 Difference]: Start difference. First operand has 351 places, 347 transitions, 895 flow. Second operand 8 states and 2402 transitions. [2022-07-12 10:30:01,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 391 transitions, 1251 flow [2022-07-12 10:30:01,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 391 transitions, 1224 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-12 10:30:01,838 INFO L242 Difference]: Finished difference. Result has 358 places, 357 transitions, 985 flow [2022-07-12 10:30:01,838 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=985, PETRI_PLACES=358, PETRI_TRANSITIONS=357} [2022-07-12 10:30:01,839 INFO L279 CegarLoopForPetriNet]: 335 programPoint places, 23 predicate places. [2022-07-12 10:30:01,839 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 357 transitions, 985 flow [2022-07-12 10:30:01,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 294.0) internal successors, (2058), 7 states have internal predecessors, (2058), 0 states have call successors, (0), 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 10:30:01,840 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:30:01,840 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:30:01,859 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 10:30:02,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:30:02,059 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:30:02,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:30:02,059 INFO L85 PathProgramCache]: Analyzing trace with hash -2047508188, now seen corresponding path program 1 times [2022-07-12 10:30:02,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:30:02,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312400428] [2022-07-12 10:30:02,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:02,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:30:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:30:02,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:30:02,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312400428] [2022-07-12 10:30:02,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312400428] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:30:02,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:30:02,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:30:02,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482603439] [2022-07-12 10:30:02,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:30:02,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:30:02,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:30:02,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:30:02,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:30:02,224 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 368 [2022-07-12 10:30:02,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 357 transitions, 985 flow. Second operand has 7 states, 7 states have (on average 293.14285714285717) internal successors, (2052), 7 states have internal predecessors, (2052), 0 states have call successors, (0), 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 10:30:02,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:30:02,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 368 [2022-07-12 10:30:02,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:30:03,128 INFO L129 PetriNetUnfolder]: 927/5714 cut-off events. [2022-07-12 10:30:03,128 INFO L130 PetriNetUnfolder]: For 1754/1799 co-relation queries the response was YES. [2022-07-12 10:30:03,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8598 conditions, 5714 events. 927/5714 cut-off events. For 1754/1799 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 49273 event pairs, 655 based on Foata normal form. 65/5343 useless extension candidates. Maximal degree in co-relation 8580. Up to 1322 conditions per place. [2022-07-12 10:30:03,165 INFO L132 encePairwiseOnDemand]: 349/368 looper letters, 56 selfloop transitions, 14 changer transitions 74/415 dead transitions. [2022-07-12 10:30:03,165 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 415 transitions, 1426 flow [2022-07-12 10:30:03,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:30:03,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:30:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3293 transitions. [2022-07-12 10:30:03,170 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8134881422924901 [2022-07-12 10:30:03,170 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3293 transitions. [2022-07-12 10:30:03,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3293 transitions. [2022-07-12 10:30:03,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:30:03,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3293 transitions. [2022-07-12 10:30:03,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 299.3636363636364) internal successors, (3293), 11 states have internal predecessors, (3293), 0 states have call successors, (0), 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 10:30:03,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 368.0) internal successors, (4416), 12 states have internal predecessors, (4416), 0 states have call successors, (0), 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 10:30:03,181 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 368.0) internal successors, (4416), 12 states have internal predecessors, (4416), 0 states have call successors, (0), 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 10:30:03,181 INFO L186 Difference]: Start difference. First operand has 358 places, 357 transitions, 985 flow. Second operand 11 states and 3293 transitions. [2022-07-12 10:30:03,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 415 transitions, 1426 flow [2022-07-12 10:30:03,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 415 transitions, 1425 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:30:03,188 INFO L242 Difference]: Finished difference. Result has 370 places, 333 transitions, 849 flow [2022-07-12 10:30:03,189 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=849, PETRI_PLACES=370, PETRI_TRANSITIONS=333} [2022-07-12 10:30:03,190 INFO L279 CegarLoopForPetriNet]: 335 programPoint places, 35 predicate places. [2022-07-12 10:30:03,190 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 333 transitions, 849 flow [2022-07-12 10:30:03,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 293.14285714285717) internal successors, (2052), 7 states have internal predecessors, (2052), 0 states have call successors, (0), 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 10:30:03,190 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:30:03,191 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:30:03,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:30:03,191 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:30:03,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:30:03,192 INFO L85 PathProgramCache]: Analyzing trace with hash -335567163, now seen corresponding path program 1 times [2022-07-12 10:30:03,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:30:03,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346501974] [2022-07-12 10:30:03,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:03,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:30:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:30:03,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:30:03,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346501974] [2022-07-12 10:30:03,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346501974] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:30:03,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861791209] [2022-07-12 10:30:03,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:03,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:30:03,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:30:03,268 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 10:30:03,271 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 10:30:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:03,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 10:30:03,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:30:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:30:03,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:30:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:30:03,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861791209] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:30:03,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:30:03,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-12 10:30:03,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982225605] [2022-07-12 10:30:03,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:30:03,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:30:03,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:30:03,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:30:03,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:30:03,800 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 368 [2022-07-12 10:30:03,801 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 333 transitions, 849 flow. Second operand has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 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 10:30:03,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:30:03,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 368 [2022-07-12 10:30:03,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:30:04,207 INFO L129 PetriNetUnfolder]: 453/2812 cut-off events. [2022-07-12 10:30:04,208 INFO L130 PetriNetUnfolder]: For 1082/1169 co-relation queries the response was YES. [2022-07-12 10:30:04,229 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4391 conditions, 2812 events. 453/2812 cut-off events. For 1082/1169 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 18251 event pairs, 74 based on Foata normal form. 113/2634 useless extension candidates. Maximal degree in co-relation 4369. Up to 401 conditions per place. [2022-07-12 10:30:04,239 INFO L132 encePairwiseOnDemand]: 360/368 looper letters, 60 selfloop transitions, 7 changer transitions 0/341 dead transitions. [2022-07-12 10:30:04,240 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 341 transitions, 1021 flow [2022-07-12 10:30:04,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:30:04,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:30:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2093 transitions. [2022-07-12 10:30:04,244 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8125 [2022-07-12 10:30:04,244 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2093 transitions. [2022-07-12 10:30:04,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2093 transitions. [2022-07-12 10:30:04,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:30:04,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2093 transitions. [2022-07-12 10:30:04,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 299.0) internal successors, (2093), 7 states have internal predecessors, (2093), 0 states have call successors, (0), 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 10:30:04,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 368.0) internal successors, (2944), 8 states have internal predecessors, (2944), 0 states have call successors, (0), 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 10:30:04,251 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 368.0) internal successors, (2944), 8 states have internal predecessors, (2944), 0 states have call successors, (0), 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 10:30:04,252 INFO L186 Difference]: Start difference. First operand has 370 places, 333 transitions, 849 flow. Second operand 7 states and 2093 transitions. [2022-07-12 10:30:04,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 341 transitions, 1021 flow [2022-07-12 10:30:04,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 341 transitions, 910 flow, removed 21 selfloop flow, removed 22 redundant places. [2022-07-12 10:30:04,258 INFO L242 Difference]: Finished difference. Result has 342 places, 334 transitions, 778 flow [2022-07-12 10:30:04,258 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=778, PETRI_PLACES=342, PETRI_TRANSITIONS=334} [2022-07-12 10:30:04,259 INFO L279 CegarLoopForPetriNet]: 335 programPoint places, 7 predicate places. [2022-07-12 10:30:04,259 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 334 transitions, 778 flow [2022-07-12 10:30:04,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 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 10:30:04,260 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:30:04,260 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:30:04,279 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 10:30:04,477 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,SelfDestructingSolverStorable6 [2022-07-12 10:30:04,477 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:30:04,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:30:04,478 INFO L85 PathProgramCache]: Analyzing trace with hash 371551471, now seen corresponding path program 1 times [2022-07-12 10:30:04,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:30:04,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097879548] [2022-07-12 10:30:04,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:04,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:30:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:30:04,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:30:04,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097879548] [2022-07-12 10:30:04,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097879548] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:30:04,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017201347] [2022-07-12 10:30:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:04,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:30:04,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:30:04,636 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 10:30:04,637 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 10:30:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:04,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 10:30:04,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:30:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:30:04,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:30:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:30:05,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017201347] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:30:05,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:30:05,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-12 10:30:05,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818414249] [2022-07-12 10:30:05,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:30:05,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:30:05,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:30:05,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:30:05,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:30:05,286 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 368 [2022-07-12 10:30:05,287 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 334 transitions, 778 flow. Second operand has 7 states, 7 states have (on average 297.14285714285717) internal successors, (2080), 7 states have internal predecessors, (2080), 0 states have call successors, (0), 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 10:30:05,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:30:05,288 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 368 [2022-07-12 10:30:05,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:30:05,892 INFO L129 PetriNetUnfolder]: 357/3660 cut-off events. [2022-07-12 10:30:05,893 INFO L130 PetriNetUnfolder]: For 538/710 co-relation queries the response was YES. [2022-07-12 10:30:05,922 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4811 conditions, 3660 events. 357/3660 cut-off events. For 538/710 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 29301 event pairs, 133 based on Foata normal form. 171/3541 useless extension candidates. Maximal degree in co-relation 4799. Up to 330 conditions per place. [2022-07-12 10:30:05,936 INFO L132 encePairwiseOnDemand]: 360/368 looper letters, 62 selfloop transitions, 7 changer transitions 0/343 dead transitions. [2022-07-12 10:30:05,937 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 343 transitions, 951 flow [2022-07-12 10:30:05,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:30:05,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:30:05,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2093 transitions. [2022-07-12 10:30:05,942 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8125 [2022-07-12 10:30:05,942 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2093 transitions. [2022-07-12 10:30:05,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2093 transitions. [2022-07-12 10:30:05,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:30:05,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2093 transitions. [2022-07-12 10:30:05,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 299.0) internal successors, (2093), 7 states have internal predecessors, (2093), 0 states have call successors, (0), 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 10:30:05,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 368.0) internal successors, (2944), 8 states have internal predecessors, (2944), 0 states have call successors, (0), 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 10:30:05,954 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 368.0) internal successors, (2944), 8 states have internal predecessors, (2944), 0 states have call successors, (0), 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 10:30:05,954 INFO L186 Difference]: Start difference. First operand has 342 places, 334 transitions, 778 flow. Second operand 7 states and 2093 transitions. [2022-07-12 10:30:05,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 343 transitions, 951 flow [2022-07-12 10:30:05,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 343 transitions, 940 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-12 10:30:05,961 INFO L242 Difference]: Finished difference. Result has 345 places, 335 transitions, 795 flow [2022-07-12 10:30:05,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=795, PETRI_PLACES=345, PETRI_TRANSITIONS=335} [2022-07-12 10:30:05,963 INFO L279 CegarLoopForPetriNet]: 335 programPoint places, 10 predicate places. [2022-07-12 10:30:05,963 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 335 transitions, 795 flow [2022-07-12 10:30:05,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 297.14285714285717) internal successors, (2080), 7 states have internal predecessors, (2080), 0 states have call successors, (0), 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 10:30:05,964 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:30:05,964 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:30:06,015 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 10:30:06,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:30:06,196 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:30:06,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:30:06,196 INFO L85 PathProgramCache]: Analyzing trace with hash 856971819, now seen corresponding path program 1 times [2022-07-12 10:30:06,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:30:06,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148785036] [2022-07-12 10:30:06,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:06,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:30:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:30:08,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:30:08,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148785036] [2022-07-12 10:30:08,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148785036] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:30:08,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363532949] [2022-07-12 10:30:08,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:08,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:30:08,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:30:08,485 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 10:30:08,486 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 10:30:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:08,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 156 conjunts are in the unsatisfiable core [2022-07-12 10:30:08,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:30:09,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-07-12 10:30:10,027 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 11 treesize of output 7 [2022-07-12 10:30:11,012 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 10:30:11,012 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 10:30:11,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:30:12,084 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 10:30:12,085 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 10:30:12,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:30:12,664 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 6 treesize of output 5 [2022-07-12 10:30:12,829 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 6 treesize of output 5 [2022-07-12 10:30:12,969 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 6 treesize of output 5 [2022-07-12 10:30:15,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 10:30:15,719 INFO L356 Elim1Store]: treesize reduction 207, result has 21.6 percent of original size [2022-07-12 10:30:15,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 76 [2022-07-12 10:30:28,395 WARN L233 SmtUtils]: Spent 12.37s on a formula simplification. DAG size of input: 62 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 10:30:28,624 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:30:28,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 172 [2022-07-12 10:30:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:30:29,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:30:32,733 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 10 treesize of output 8 [2022-07-12 10:30:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:30:33,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363532949] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:30:33,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:30:33,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 74, 50] total 155 [2022-07-12 10:30:33,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311195757] [2022-07-12 10:30:33,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:30:33,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-07-12 10:30:33,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:30:33,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-07-12 10:30:33,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=22809, Unknown=0, NotChecked=0, Total=23870 [2022-07-12 10:30:33,192 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 368 [2022-07-12 10:30:33,204 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 335 transitions, 795 flow. Second operand has 155 states, 155 states have (on average 134.29032258064515) internal successors, (20815), 155 states have internal predecessors, (20815), 0 states have call successors, (0), 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 10:30:33,204 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:30:33,205 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 368 [2022-07-12 10:30:33,205 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand