./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/triangular-longest-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 874fb84f685baf0441a9bf8db1864605baa10908128545fe3028b9b499246108 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:39:57,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:39:57,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:39:57,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:39:57,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:39:57,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:39:57,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:39:57,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:39:57,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:39:57,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:39:57,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:39:57,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:39:57,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:39:57,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:39:57,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:39:57,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:39:57,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:39:57,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:39:57,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:39:57,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:39:57,558 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:39:57,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:39:57,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:39:57,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:39:57,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:39:57,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:39:57,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:39:57,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:39:57,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:39:57,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:39:57,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:39:57,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:39:57,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:39:57,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:39:57,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:39:57,572 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:39:57,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:39:57,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:39:57,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:39:57,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:39:57,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:39:57,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:39:57,576 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:39:57,604 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:39:57,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:39:57,605 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:39:57,605 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:39:57,606 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:39:57,606 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:39:57,607 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:39:57,607 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:39:57,607 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:39:57,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:39:57,608 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:39:57,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:39:57,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:39:57,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:39:57,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:39:57,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:39:57,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:39:57,609 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:39:57,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:39:57,610 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:39:57,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:39:57,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:39:57,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:39:57,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:39:57,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:39:57,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:39:57,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:39:57,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:39:57,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:39:57,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:39:57,612 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:39:57,612 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:39:57,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:39:57,613 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 874fb84f685baf0441a9bf8db1864605baa10908128545fe3028b9b499246108 [2022-07-13 21:39:57,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:39:57,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:39:57,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:39:57,840 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:39:57,840 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:39:57,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longest-2.i [2022-07-13 21:39:57,880 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43f9d638d/cf76ff1cc53f4274afab9c620974b0fd/FLAGca1f35c13 [2022-07-13 21:39:58,322 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:39:58,322 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longest-2.i [2022-07-13 21:39:58,337 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43f9d638d/cf76ff1cc53f4274afab9c620974b0fd/FLAGca1f35c13 [2022-07-13 21:39:58,348 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43f9d638d/cf76ff1cc53f4274afab9c620974b0fd [2022-07-13 21:39:58,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:39:58,352 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:39:58,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:39:58,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:39:58,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:39:58,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:39:58" (1/1) ... [2022-07-13 21:39:58,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aacca71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:58, skipping insertion in model container [2022-07-13 21:39:58,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:39:58" (1/1) ... [2022-07-13 21:39:58,361 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:39:58,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:39:58,692 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longest-2.i[30964,30977] [2022-07-13 21:39:58,694 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:39:58,698 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:39:58,733 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longest-2.i[30964,30977] [2022-07-13 21:39:58,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:39:58,753 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:39:58,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:58 WrapperNode [2022-07-13 21:39:58,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:39:58,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:39:58,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:39:58,754 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:39:58,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:58" (1/1) ... [2022-07-13 21:39:58,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:58" (1/1) ... [2022-07-13 21:39:58,791 INFO L137 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-07-13 21:39:58,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:39:58,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:39:58,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:39:58,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:39:58,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:58" (1/1) ... [2022-07-13 21:39:58,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:58" (1/1) ... [2022-07-13 21:39:58,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:58" (1/1) ... [2022-07-13 21:39:58,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:58" (1/1) ... [2022-07-13 21:39:58,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:58" (1/1) ... [2022-07-13 21:39:58,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:58" (1/1) ... [2022-07-13 21:39:58,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:58" (1/1) ... [2022-07-13 21:39:58,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:39:58,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:39:58,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:39:58,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:39:58,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:58" (1/1) ... [2022-07-13 21:39:58,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:39:58,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:58,850 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) [2022-07-13 21:39:58,851 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 [2022-07-13 21:39:58,874 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-07-13 21:39:58,874 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-07-13 21:39:58,874 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-07-13 21:39:58,874 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-07-13 21:39:58,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:39:58,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 21:39:58,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:39:58,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:39:58,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:39:58,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:39:58,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 21:39:58,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:39:58,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:39:58,880 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:39:58,971 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:39:58,972 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:39:59,095 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:39:59,107 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:39:59,107 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 21:39:59,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:39:59 BoogieIcfgContainer [2022-07-13 21:39:59,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:39:59,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:39:59,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:39:59,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:39:59,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:39:58" (1/3) ... [2022-07-13 21:39:59,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56de7c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:39:59, skipping insertion in model container [2022-07-13 21:39:59,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:58" (2/3) ... [2022-07-13 21:39:59,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56de7c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:39:59, skipping insertion in model container [2022-07-13 21:39:59,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:39:59" (3/3) ... [2022-07-13 21:39:59,116 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2022-07-13 21:39:59,121 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:39:59,127 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:39:59,128 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:39:59,128 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:39:59,185 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:39:59,215 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2022-07-13 21:39:59,271 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2022-07-13 21:39:59,271 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:39:59,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-07-13 21:39:59,273 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2022-07-13 21:39:59,276 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2022-07-13 21:39:59,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:39:59,291 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@6913b17b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6027167b [2022-07-13 21:39:59,291 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 21:39:59,310 INFO L129 PetriNetUnfolder]: 4/58 cut-off events. [2022-07-13 21:39:59,310 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:39:59,310 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:59,311 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] [2022-07-13 21:39:59,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:59,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:59,315 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2022-07-13 21:39:59,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:59,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425504453] [2022-07-13 21:39:59,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:59,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:59,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:59,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425504453] [2022-07-13 21:39:59,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425504453] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:59,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:59,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:39:59,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070623844] [2022-07-13 21:39:59,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:59,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:39:59,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:59,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:39:59,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:39:59,639 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:59,644 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 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) [2022-07-13 21:39:59,644 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:59,644 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:59,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:59,774 INFO L129 PetriNetUnfolder]: 42/203 cut-off events. [2022-07-13 21:39:59,774 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-13 21:39:59,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 203 events. 42/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 761 event pairs, 3 based on Foata normal form. 45/231 useless extension candidates. Maximal degree in co-relation 250. Up to 28 conditions per place. [2022-07-13 21:39:59,780 INFO L132 encePairwiseOnDemand]: 59/70 looper letters, 22 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2022-07-13 21:39:59,781 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 271 flow [2022-07-13 21:39:59,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 21:39:59,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-13 21:39:59,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 613 transitions. [2022-07-13 21:39:59,793 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8757142857142857 [2022-07-13 21:39:59,794 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 613 transitions. [2022-07-13 21:39:59,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 613 transitions. [2022-07-13 21:39:59,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:59,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 613 transitions. [2022-07-13 21:39:59,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.3) internal successors, (613), 10 states have internal predecessors, (613), 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) [2022-07-13 21:39:59,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 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) [2022-07-13 21:39:59,806 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 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) [2022-07-13 21:39:59,807 INFO L186 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 10 states and 613 transitions. [2022-07-13 21:39:59,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 271 flow [2022-07-13 21:39:59,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 21:39:59,811 INFO L242 Difference]: Finished difference. Result has 85 places, 85 transitions, 276 flow [2022-07-13 21:39:59,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2022-07-13 21:39:59,815 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2022-07-13 21:39:59,815 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 276 flow [2022-07-13 21:39:59,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 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) [2022-07-13 21:39:59,816 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:59,816 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] [2022-07-13 21:39:59,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:39:59,816 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:59,817 INFO L85 PathProgramCache]: Analyzing trace with hash 245149124, now seen corresponding path program 1 times [2022-07-13 21:39:59,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:59,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936850362] [2022-07-13 21:39:59,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:59,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:59,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:59,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936850362] [2022-07-13 21:39:59,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936850362] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:59,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:59,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:39:59,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239165912] [2022-07-13 21:39:59,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:59,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:39:59,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:59,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:39:59,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:39:59,949 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:59,949 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2022-07-13 21:39:59,949 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:59,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:59,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:00,084 INFO L129 PetriNetUnfolder]: 46/219 cut-off events. [2022-07-13 21:40:00,085 INFO L130 PetriNetUnfolder]: For 117/122 co-relation queries the response was YES. [2022-07-13 21:40:00,087 INFO L84 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 219 events. 46/219 cut-off events. For 117/122 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 854 event pairs, 0 based on Foata normal form. 3/207 useless extension candidates. Maximal degree in co-relation 378. Up to 35 conditions per place. [2022-07-13 21:40:00,088 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 16 selfloop transitions, 9 changer transitions 40/110 dead transitions. [2022-07-13 21:40:00,088 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 508 flow [2022-07-13 21:40:00,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 21:40:00,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 21:40:00,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 475 transitions. [2022-07-13 21:40:00,104 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8482142857142857 [2022-07-13 21:40:00,104 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 475 transitions. [2022-07-13 21:40:00,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 475 transitions. [2022-07-13 21:40:00,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:00,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 475 transitions. [2022-07-13 21:40:00,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.375) internal successors, (475), 8 states have internal predecessors, (475), 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) [2022-07-13 21:40:00,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 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) [2022-07-13 21:40:00,107 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 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) [2022-07-13 21:40:00,107 INFO L186 Difference]: Start difference. First operand has 85 places, 85 transitions, 276 flow. Second operand 8 states and 475 transitions. [2022-07-13 21:40:00,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 508 flow [2022-07-13 21:40:00,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:40:00,111 INFO L242 Difference]: Finished difference. Result has 96 places, 67 transitions, 237 flow [2022-07-13 21:40:00,112 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=237, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2022-07-13 21:40:00,112 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2022-07-13 21:40:00,112 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 237 flow [2022-07-13 21:40:00,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2022-07-13 21:40:00,113 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:00,113 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] [2022-07-13 21:40:00,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:40:00,113 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:40:00,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:00,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2022-07-13 21:40:00,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:00,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130070191] [2022-07-13 21:40:00,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:00,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:00,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:00,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130070191] [2022-07-13 21:40:00,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130070191] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:40:00,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:40:00,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:40:00,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14820384] [2022-07-13 21:40:00,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:40:00,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:40:00,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:00,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:40:00,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:40:00,197 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:00,197 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 67 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2022-07-13 21:40:00,197 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:00,197 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:00,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:00,268 INFO L129 PetriNetUnfolder]: 37/188 cut-off events. [2022-07-13 21:40:00,268 INFO L130 PetriNetUnfolder]: For 256/265 co-relation queries the response was YES. [2022-07-13 21:40:00,270 INFO L84 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 188 events. 37/188 cut-off events. For 256/265 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 594 event pairs, 0 based on Foata normal form. 12/182 useless extension candidates. Maximal degree in co-relation 354. Up to 35 conditions per place. [2022-07-13 21:40:00,271 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 23 selfloop transitions, 11 changer transitions 8/87 dead transitions. [2022-07-13 21:40:00,271 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 457 flow [2022-07-13 21:40:00,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:40:00,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:40:00,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2022-07-13 21:40:00,272 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2022-07-13 21:40:00,272 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2022-07-13 21:40:00,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2022-07-13 21:40:00,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:00,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2022-07-13 21:40:00,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 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) [2022-07-13 21:40:00,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 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) [2022-07-13 21:40:00,276 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 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) [2022-07-13 21:40:00,276 INFO L186 Difference]: Start difference. First operand has 96 places, 67 transitions, 237 flow. Second operand 9 states and 530 transitions. [2022-07-13 21:40:00,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 457 flow [2022-07-13 21:40:00,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 387 flow, removed 25 selfloop flow, removed 9 redundant places. [2022-07-13 21:40:00,283 INFO L242 Difference]: Finished difference. Result has 86 places, 72 transitions, 289 flow [2022-07-13 21:40:00,283 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=289, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2022-07-13 21:40:00,285 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2022-07-13 21:40:00,285 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 289 flow [2022-07-13 21:40:00,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2022-07-13 21:40:00,285 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:00,285 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] [2022-07-13 21:40:00,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:40:00,286 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:40:00,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:00,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2022-07-13 21:40:00,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:00,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121153931] [2022-07-13 21:40:00,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:00,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:00,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:00,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121153931] [2022-07-13 21:40:00,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121153931] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:40:00,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:40:00,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:40:00,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051292056] [2022-07-13 21:40:00,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:40:00,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:40:00,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:00,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:40:00,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:40:00,377 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:00,378 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2022-07-13 21:40:00,378 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:00,378 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:00,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:00,476 INFO L129 PetriNetUnfolder]: 34/212 cut-off events. [2022-07-13 21:40:00,476 INFO L130 PetriNetUnfolder]: For 292/326 co-relation queries the response was YES. [2022-07-13 21:40:00,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 212 events. 34/212 cut-off events. For 292/326 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 803 event pairs, 0 based on Foata normal form. 25/216 useless extension candidates. Maximal degree in co-relation 425. Up to 37 conditions per place. [2022-07-13 21:40:00,478 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 21 selfloop transitions, 15 changer transitions 11/92 dead transitions. [2022-07-13 21:40:00,478 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 92 transitions, 536 flow [2022-07-13 21:40:00,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 21:40:00,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-13 21:40:00,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 585 transitions. [2022-07-13 21:40:00,480 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8357142857142857 [2022-07-13 21:40:00,480 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 585 transitions. [2022-07-13 21:40:00,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 585 transitions. [2022-07-13 21:40:00,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:00,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 585 transitions. [2022-07-13 21:40:00,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.5) internal successors, (585), 10 states have internal predecessors, (585), 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) [2022-07-13 21:40:00,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 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) [2022-07-13 21:40:00,486 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 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) [2022-07-13 21:40:00,486 INFO L186 Difference]: Start difference. First operand has 86 places, 72 transitions, 289 flow. Second operand 10 states and 585 transitions. [2022-07-13 21:40:00,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 92 transitions, 536 flow [2022-07-13 21:40:00,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 92 transitions, 511 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-07-13 21:40:00,492 INFO L242 Difference]: Finished difference. Result has 95 places, 77 transitions, 370 flow [2022-07-13 21:40:00,492 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=370, PETRI_PLACES=95, PETRI_TRANSITIONS=77} [2022-07-13 21:40:00,493 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 25 predicate places. [2022-07-13 21:40:00,493 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 77 transitions, 370 flow [2022-07-13 21:40:00,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2022-07-13 21:40:00,497 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:00,497 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] [2022-07-13 21:40:00,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:40:00,498 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:40:00,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:00,498 INFO L85 PathProgramCache]: Analyzing trace with hash 506405013, now seen corresponding path program 1 times [2022-07-13 21:40:00,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:00,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357687269] [2022-07-13 21:40:00,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:00,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:00,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:00,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357687269] [2022-07-13 21:40:00,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357687269] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:40:00,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:40:00,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:40:00,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256299115] [2022-07-13 21:40:00,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:40:00,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:40:00,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:00,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:40:00,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:40:00,591 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:00,591 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 77 transitions, 370 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 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) [2022-07-13 21:40:00,591 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:00,592 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:00,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:00,672 INFO L129 PetriNetUnfolder]: 47/255 cut-off events. [2022-07-13 21:40:00,672 INFO L130 PetriNetUnfolder]: For 523/544 co-relation queries the response was YES. [2022-07-13 21:40:00,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 255 events. 47/255 cut-off events. For 523/544 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1028 event pairs, 1 based on Foata normal form. 19/250 useless extension candidates. Maximal degree in co-relation 568. Up to 55 conditions per place. [2022-07-13 21:40:00,674 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 25 selfloop transitions, 23 changer transitions 8/101 dead transitions. [2022-07-13 21:40:00,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 101 transitions, 694 flow [2022-07-13 21:40:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 21:40:00,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-13 21:40:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 644 transitions. [2022-07-13 21:40:00,677 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8363636363636363 [2022-07-13 21:40:00,677 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 644 transitions. [2022-07-13 21:40:00,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 644 transitions. [2022-07-13 21:40:00,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:00,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 644 transitions. [2022-07-13 21:40:00,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.54545454545455) internal successors, (644), 11 states have internal predecessors, (644), 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) [2022-07-13 21:40:00,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 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) [2022-07-13 21:40:00,680 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 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) [2022-07-13 21:40:00,680 INFO L186 Difference]: Start difference. First operand has 95 places, 77 transitions, 370 flow. Second operand 11 states and 644 transitions. [2022-07-13 21:40:00,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 101 transitions, 694 flow [2022-07-13 21:40:00,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 101 transitions, 647 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-07-13 21:40:00,684 INFO L242 Difference]: Finished difference. Result has 104 places, 83 transitions, 485 flow [2022-07-13 21:40:00,684 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=485, PETRI_PLACES=104, PETRI_TRANSITIONS=83} [2022-07-13 21:40:00,686 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 34 predicate places. [2022-07-13 21:40:00,686 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 83 transitions, 485 flow [2022-07-13 21:40:00,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 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) [2022-07-13 21:40:00,687 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:00,687 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] [2022-07-13 21:40:00,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:40:00,687 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:40:00,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:00,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1283973881, now seen corresponding path program 2 times [2022-07-13 21:40:00,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:00,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696500305] [2022-07-13 21:40:00,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:00,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:00,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:00,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696500305] [2022-07-13 21:40:00,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696500305] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:40:00,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:40:00,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:40:00,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058690524] [2022-07-13 21:40:00,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:40:00,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:40:00,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:00,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:40:00,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:40:00,773 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:00,774 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 83 transitions, 485 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 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) [2022-07-13 21:40:00,774 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:00,774 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:00,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:00,898 INFO L129 PetriNetUnfolder]: 42/247 cut-off events. [2022-07-13 21:40:00,898 INFO L130 PetriNetUnfolder]: For 1015/1057 co-relation queries the response was YES. [2022-07-13 21:40:00,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 247 events. 42/247 cut-off events. For 1015/1057 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 995 event pairs, 1 based on Foata normal form. 24/247 useless extension candidates. Maximal degree in co-relation 677. Up to 51 conditions per place. [2022-07-13 21:40:00,900 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 21 selfloop transitions, 27 changer transitions 11/104 dead transitions. [2022-07-13 21:40:00,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 104 transitions, 903 flow [2022-07-13 21:40:00,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 21:40:00,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-13 21:40:00,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 696 transitions. [2022-07-13 21:40:00,902 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-07-13 21:40:00,902 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 696 transitions. [2022-07-13 21:40:00,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 696 transitions. [2022-07-13 21:40:00,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:00,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 696 transitions. [2022-07-13 21:40:00,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 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) [2022-07-13 21:40:00,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 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) [2022-07-13 21:40:00,905 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 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) [2022-07-13 21:40:00,905 INFO L186 Difference]: Start difference. First operand has 104 places, 83 transitions, 485 flow. Second operand 12 states and 696 transitions. [2022-07-13 21:40:00,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 104 transitions, 903 flow [2022-07-13 21:40:00,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 104 transitions, 838 flow, removed 23 selfloop flow, removed 5 redundant places. [2022-07-13 21:40:00,910 INFO L242 Difference]: Finished difference. Result has 113 places, 86 transitions, 590 flow [2022-07-13 21:40:00,910 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=590, PETRI_PLACES=113, PETRI_TRANSITIONS=86} [2022-07-13 21:40:00,910 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 43 predicate places. [2022-07-13 21:40:00,911 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 86 transitions, 590 flow [2022-07-13 21:40:00,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 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) [2022-07-13 21:40:00,911 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:00,911 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:00,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:40:00,911 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:40:00,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:00,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1873617744, now seen corresponding path program 1 times [2022-07-13 21:40:00,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:00,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108190213] [2022-07-13 21:40:00,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:00,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:00,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:00,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108190213] [2022-07-13 21:40:00,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108190213] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:00,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266936452] [2022-07-13 21:40:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:00,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:00,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:00,985 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) [2022-07-13 21:40:00,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:40:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:01,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 21:40:01,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:01,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:01,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266936452] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:01,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:01,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-07-13 21:40:01,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916378198] [2022-07-13 21:40:01,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:01,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 21:40:01,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:01,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 21:40:01,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-07-13 21:40:01,281 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:01,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 86 transitions, 590 flow. Second operand has 13 states, 13 states have (on average 56.69230769230769) internal successors, (737), 13 states have internal predecessors, (737), 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) [2022-07-13 21:40:01,281 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:01,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:01,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:01,460 INFO L129 PetriNetUnfolder]: 54/338 cut-off events. [2022-07-13 21:40:01,461 INFO L130 PetriNetUnfolder]: For 1922/1961 co-relation queries the response was YES. [2022-07-13 21:40:01,462 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1055 conditions, 338 events. 54/338 cut-off events. For 1922/1961 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1322 event pairs, 0 based on Foata normal form. 21/326 useless extension candidates. Maximal degree in co-relation 1000. Up to 67 conditions per place. [2022-07-13 21:40:01,464 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 37 selfloop transitions, 19 changer transitions 20/121 dead transitions. [2022-07-13 21:40:01,464 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 121 transitions, 1338 flow [2022-07-13 21:40:01,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 21:40:01,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-13 21:40:01,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1104 transitions. [2022-07-13 21:40:01,466 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8300751879699249 [2022-07-13 21:40:01,467 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1104 transitions. [2022-07-13 21:40:01,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1104 transitions. [2022-07-13 21:40:01,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:01,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1104 transitions. [2022-07-13 21:40:01,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 58.10526315789474) internal successors, (1104), 19 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) [2022-07-13 21:40:01,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 70.0) internal successors, (1400), 20 states have internal predecessors, (1400), 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) [2022-07-13 21:40:01,471 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 70.0) internal successors, (1400), 20 states have internal predecessors, (1400), 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) [2022-07-13 21:40:01,471 INFO L186 Difference]: Start difference. First operand has 113 places, 86 transitions, 590 flow. Second operand 19 states and 1104 transitions. [2022-07-13 21:40:01,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 121 transitions, 1338 flow [2022-07-13 21:40:01,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 121 transitions, 1210 flow, removed 41 selfloop flow, removed 11 redundant places. [2022-07-13 21:40:01,478 INFO L242 Difference]: Finished difference. Result has 130 places, 92 transitions, 709 flow [2022-07-13 21:40:01,478 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=709, PETRI_PLACES=130, PETRI_TRANSITIONS=92} [2022-07-13 21:40:01,479 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 60 predicate places. [2022-07-13 21:40:01,479 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 92 transitions, 709 flow [2022-07-13 21:40:01,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.69230769230769) internal successors, (737), 13 states have internal predecessors, (737), 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) [2022-07-13 21:40:01,479 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:01,479 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:01,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:40:01,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:01,696 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:40:01,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:01,696 INFO L85 PathProgramCache]: Analyzing trace with hash 848332772, now seen corresponding path program 2 times [2022-07-13 21:40:01,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:01,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197637223] [2022-07-13 21:40:01,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:01,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:01,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:01,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197637223] [2022-07-13 21:40:01,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197637223] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:01,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568971079] [2022-07-13 21:40:01,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:40:01,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:01,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:01,772 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) [2022-07-13 21:40:01,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:40:01,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:40:01,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:01,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 21:40:01,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:01,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:02,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568971079] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:02,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:02,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-07-13 21:40:02,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15804021] [2022-07-13 21:40:02,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:02,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 21:40:02,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:02,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 21:40:02,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-07-13 21:40:02,023 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:02,024 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 92 transitions, 709 flow. Second operand has 14 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 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) [2022-07-13 21:40:02,024 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:02,024 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:02,024 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:02,358 INFO L129 PetriNetUnfolder]: 71/432 cut-off events. [2022-07-13 21:40:02,359 INFO L130 PetriNetUnfolder]: For 6308/6384 co-relation queries the response was YES. [2022-07-13 21:40:02,361 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1784 conditions, 432 events. 71/432 cut-off events. For 6308/6384 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2146 event pairs, 0 based on Foata normal form. 24/413 useless extension candidates. Maximal degree in co-relation 1713. Up to 95 conditions per place. [2022-07-13 21:40:02,364 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 32 selfloop transitions, 44 changer transitions 23/144 dead transitions. [2022-07-13 21:40:02,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 144 transitions, 2218 flow [2022-07-13 21:40:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-13 21:40:02,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-13 21:40:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1564 transitions. [2022-07-13 21:40:02,368 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8275132275132275 [2022-07-13 21:40:02,368 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1564 transitions. [2022-07-13 21:40:02,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1564 transitions. [2022-07-13 21:40:02,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:02,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1564 transitions. [2022-07-13 21:40:02,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 57.925925925925924) internal successors, (1564), 27 states have internal predecessors, (1564), 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) [2022-07-13 21:40:02,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 70.0) internal successors, (1960), 28 states have internal predecessors, (1960), 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) [2022-07-13 21:40:02,376 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 70.0) internal successors, (1960), 28 states have internal predecessors, (1960), 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) [2022-07-13 21:40:02,376 INFO L186 Difference]: Start difference. First operand has 130 places, 92 transitions, 709 flow. Second operand 27 states and 1564 transitions. [2022-07-13 21:40:02,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 144 transitions, 2218 flow [2022-07-13 21:40:02,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 144 transitions, 1781 flow, removed 206 selfloop flow, removed 12 redundant places. [2022-07-13 21:40:02,390 INFO L242 Difference]: Finished difference. Result has 155 places, 109 transitions, 1090 flow [2022-07-13 21:40:02,390 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1090, PETRI_PLACES=155, PETRI_TRANSITIONS=109} [2022-07-13 21:40:02,391 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 85 predicate places. [2022-07-13 21:40:02,391 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 109 transitions, 1090 flow [2022-07-13 21:40:02,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 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) [2022-07-13 21:40:02,392 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:02,392 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:02,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:40:02,607 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,SelfDestructingSolverStorable7 [2022-07-13 21:40:02,608 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:40:02,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:02,608 INFO L85 PathProgramCache]: Analyzing trace with hash 2100588598, now seen corresponding path program 1 times [2022-07-13 21:40:02,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:02,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169854161] [2022-07-13 21:40:02,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:02,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:02,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:02,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169854161] [2022-07-13 21:40:02,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169854161] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:02,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003716075] [2022-07-13 21:40:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:02,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:02,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:02,677 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) [2022-07-13 21:40:02,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:40:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:02,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 21:40:02,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:02,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:02,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003716075] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:02,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:02,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-07-13 21:40:02,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255531892] [2022-07-13 21:40:02,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:02,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 21:40:02,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:02,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 21:40:02,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-07-13 21:40:02,902 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:02,903 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 109 transitions, 1090 flow. Second operand has 15 states, 15 states have (on average 56.53333333333333) internal successors, (848), 15 states have internal predecessors, (848), 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) [2022-07-13 21:40:02,903 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:02,903 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:02,903 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:03,207 INFO L129 PetriNetUnfolder]: 100/609 cut-off events. [2022-07-13 21:40:03,208 INFO L130 PetriNetUnfolder]: For 16953/17105 co-relation queries the response was YES. [2022-07-13 21:40:03,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3213 conditions, 609 events. 100/609 cut-off events. For 16953/17105 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3550 event pairs, 1 based on Foata normal form. 27/576 useless extension candidates. Maximal degree in co-relation 3130. Up to 141 conditions per place. [2022-07-13 21:40:03,215 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 42 selfloop transitions, 60 changer transitions 20/167 dead transitions. [2022-07-13 21:40:03,215 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 167 transitions, 3349 flow [2022-07-13 21:40:03,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 21:40:03,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-13 21:40:03,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1509 transitions. [2022-07-13 21:40:03,217 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8291208791208792 [2022-07-13 21:40:03,217 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1509 transitions. [2022-07-13 21:40:03,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1509 transitions. [2022-07-13 21:40:03,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:03,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1509 transitions. [2022-07-13 21:40:03,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 58.03846153846154) internal successors, (1509), 26 states have internal predecessors, (1509), 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) [2022-07-13 21:40:03,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 70.0) internal successors, (1890), 27 states have internal predecessors, (1890), 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) [2022-07-13 21:40:03,225 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 70.0) internal successors, (1890), 27 states have internal predecessors, (1890), 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) [2022-07-13 21:40:03,225 INFO L186 Difference]: Start difference. First operand has 155 places, 109 transitions, 1090 flow. Second operand 26 states and 1509 transitions. [2022-07-13 21:40:03,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 167 transitions, 3349 flow [2022-07-13 21:40:03,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 167 transitions, 2740 flow, removed 294 selfloop flow, removed 13 redundant places. [2022-07-13 21:40:03,268 INFO L242 Difference]: Finished difference. Result has 174 places, 125 transitions, 1495 flow [2022-07-13 21:40:03,269 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1495, PETRI_PLACES=174, PETRI_TRANSITIONS=125} [2022-07-13 21:40:03,269 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 104 predicate places. [2022-07-13 21:40:03,269 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 125 transitions, 1495 flow [2022-07-13 21:40:03,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 56.53333333333333) internal successors, (848), 15 states have internal predecessors, (848), 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) [2022-07-13 21:40:03,270 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:03,270 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:03,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 21:40:03,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:03,487 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:40:03,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:03,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1168458518, now seen corresponding path program 2 times [2022-07-13 21:40:03,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:03,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766565155] [2022-07-13 21:40:03,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:03,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:03,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:03,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766565155] [2022-07-13 21:40:03,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766565155] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:03,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735475533] [2022-07-13 21:40:03,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:40:03,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:03,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:03,562 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) [2022-07-13 21:40:03,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 21:40:03,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:40:03,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:03,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 21:40:03,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:03,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:03,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735475533] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:03,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:03,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-13 21:40:03,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552147406] [2022-07-13 21:40:03,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:03,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 21:40:03,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:03,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 21:40:03,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-07-13 21:40:03,758 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:03,758 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 125 transitions, 1495 flow. Second operand has 16 states, 16 states have (on average 56.5) internal successors, (904), 16 states have internal predecessors, (904), 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) [2022-07-13 21:40:03,759 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:03,759 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:03,759 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:04,141 INFO L129 PetriNetUnfolder]: 107/681 cut-off events. [2022-07-13 21:40:04,141 INFO L130 PetriNetUnfolder]: For 27046/27222 co-relation queries the response was YES. [2022-07-13 21:40:04,145 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3928 conditions, 681 events. 107/681 cut-off events. For 27046/27222 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 4074 event pairs, 1 based on Foata normal form. 36/649 useless extension candidates. Maximal degree in co-relation 3838. Up to 153 conditions per place. [2022-07-13 21:40:04,149 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 36 selfloop transitions, 82 changer transitions 25/188 dead transitions. [2022-07-13 21:40:04,149 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 188 transitions, 4419 flow [2022-07-13 21:40:04,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-13 21:40:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-13 21:40:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1564 transitions. [2022-07-13 21:40:04,151 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8275132275132275 [2022-07-13 21:40:04,152 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1564 transitions. [2022-07-13 21:40:04,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1564 transitions. [2022-07-13 21:40:04,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:04,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1564 transitions. [2022-07-13 21:40:04,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 57.925925925925924) internal successors, (1564), 27 states have internal predecessors, (1564), 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) [2022-07-13 21:40:04,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 70.0) internal successors, (1960), 28 states have internal predecessors, (1960), 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) [2022-07-13 21:40:04,160 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 70.0) internal successors, (1960), 28 states have internal predecessors, (1960), 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) [2022-07-13 21:40:04,160 INFO L186 Difference]: Start difference. First operand has 174 places, 125 transitions, 1495 flow. Second operand 27 states and 1564 transitions. [2022-07-13 21:40:04,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 188 transitions, 4419 flow [2022-07-13 21:40:04,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 188 transitions, 3258 flow, removed 540 selfloop flow, removed 22 redundant places. [2022-07-13 21:40:04,207 INFO L242 Difference]: Finished difference. Result has 188 places, 144 transitions, 1930 flow [2022-07-13 21:40:04,208 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1930, PETRI_PLACES=188, PETRI_TRANSITIONS=144} [2022-07-13 21:40:04,208 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 118 predicate places. [2022-07-13 21:40:04,208 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 144 transitions, 1930 flow [2022-07-13 21:40:04,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 56.5) internal successors, (904), 16 states have internal predecessors, (904), 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) [2022-07-13 21:40:04,209 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:04,209 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:04,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 21:40:04,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:04,423 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:40:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:04,424 INFO L85 PathProgramCache]: Analyzing trace with hash -403767758, now seen corresponding path program 3 times [2022-07-13 21:40:04,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:04,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692968574] [2022-07-13 21:40:04,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:04,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:04,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:04,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692968574] [2022-07-13 21:40:04,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692968574] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:04,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161264593] [2022-07-13 21:40:04,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 21:40:04,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:04,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:04,509 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:40:04,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 21:40:04,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 21:40:04,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:04,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 21:40:04,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:04,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:04,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161264593] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:04,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:04,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-07-13 21:40:04,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172108190] [2022-07-13 21:40:04,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:04,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 21:40:04,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:04,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 21:40:04,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-07-13 21:40:04,783 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:04,784 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 144 transitions, 1930 flow. Second operand has 23 states, 23 states have (on average 56.391304347826086) internal successors, (1297), 23 states have internal predecessors, (1297), 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) [2022-07-13 21:40:04,784 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:04,784 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:04,784 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:05,634 INFO L129 PetriNetUnfolder]: 146/906 cut-off events. [2022-07-13 21:40:05,634 INFO L130 PetriNetUnfolder]: For 35538/35673 co-relation queries the response was YES. [2022-07-13 21:40:05,640 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5349 conditions, 906 events. 146/906 cut-off events. For 35538/35673 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5286 event pairs, 0 based on Foata normal form. 34/849 useless extension candidates. Maximal degree in co-relation 5254. Up to 197 conditions per place. [2022-07-13 21:40:05,645 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 48 selfloop transitions, 121 changer transitions 29/243 dead transitions. [2022-07-13 21:40:05,645 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 243 transitions, 6528 flow [2022-07-13 21:40:05,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-13 21:40:05,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-07-13 21:40:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2720 transitions. [2022-07-13 21:40:05,648 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8267477203647416 [2022-07-13 21:40:05,648 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2720 transitions. [2022-07-13 21:40:05,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2720 transitions. [2022-07-13 21:40:05,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:05,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2720 transitions. [2022-07-13 21:40:05,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 57.87234042553192) internal successors, (2720), 47 states have internal predecessors, (2720), 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) [2022-07-13 21:40:05,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 70.0) internal successors, (3360), 48 states have internal predecessors, (3360), 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) [2022-07-13 21:40:05,657 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 70.0) internal successors, (3360), 48 states have internal predecessors, (3360), 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) [2022-07-13 21:40:05,657 INFO L186 Difference]: Start difference. First operand has 188 places, 144 transitions, 1930 flow. Second operand 47 states and 2720 transitions. [2022-07-13 21:40:05,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 243 transitions, 6528 flow [2022-07-13 21:40:05,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 243 transitions, 5535 flow, removed 461 selfloop flow, removed 20 redundant places. [2022-07-13 21:40:05,701 INFO L242 Difference]: Finished difference. Result has 235 places, 181 transitions, 3021 flow [2022-07-13 21:40:05,701 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=3021, PETRI_PLACES=235, PETRI_TRANSITIONS=181} [2022-07-13 21:40:05,702 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 165 predicate places. [2022-07-13 21:40:05,702 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 181 transitions, 3021 flow [2022-07-13 21:40:05,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.391304347826086) internal successors, (1297), 23 states have internal predecessors, (1297), 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) [2022-07-13 21:40:05,702 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:05,703 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:05,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 21:40:05,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-13 21:40:05,915 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:40:05,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:05,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1557373383, now seen corresponding path program 4 times [2022-07-13 21:40:05,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:05,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711333703] [2022-07-13 21:40:05,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:05,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:06,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:06,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711333703] [2022-07-13 21:40:06,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711333703] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:06,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108609475] [2022-07-13 21:40:06,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 21:40:06,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:06,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:06,116 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:40:06,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 21:40:06,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 21:40:06,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:06,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 21:40:06,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:06,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:06,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108609475] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:06,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:06,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 35 [2022-07-13 21:40:06,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923109735] [2022-07-13 21:40:06,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:06,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-13 21:40:06,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:06,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-13 21:40:06,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2022-07-13 21:40:06,830 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:06,831 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 181 transitions, 3021 flow. Second operand has 35 states, 35 states have (on average 56.2) internal successors, (1967), 35 states have internal predecessors, (1967), 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) [2022-07-13 21:40:06,831 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:06,831 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:06,831 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:07,783 INFO L129 PetriNetUnfolder]: 204/1385 cut-off events. [2022-07-13 21:40:07,784 INFO L130 PetriNetUnfolder]: For 110227/110431 co-relation queries the response was YES. [2022-07-13 21:40:07,792 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10292 conditions, 1385 events. 204/1385 cut-off events. For 110227/110431 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8291 event pairs, 1 based on Foata normal form. 39/1276 useless extension candidates. Maximal degree in co-relation 10180. Up to 299 conditions per place. [2022-07-13 21:40:07,802 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 106 selfloop transitions, 110 changer transitions 50/311 dead transitions. [2022-07-13 21:40:07,802 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 311 transitions, 11632 flow [2022-07-13 21:40:07,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-13 21:40:07,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-07-13 21:40:07,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3233 transitions. [2022-07-13 21:40:07,810 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8247448979591837 [2022-07-13 21:40:07,811 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3233 transitions. [2022-07-13 21:40:07,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3233 transitions. [2022-07-13 21:40:07,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:07,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3233 transitions. [2022-07-13 21:40:07,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 57.732142857142854) internal successors, (3233), 56 states have internal predecessors, (3233), 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) [2022-07-13 21:40:07,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 70.0) internal successors, (3990), 57 states have internal predecessors, (3990), 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) [2022-07-13 21:40:07,836 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 70.0) internal successors, (3990), 57 states have internal predecessors, (3990), 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) [2022-07-13 21:40:07,836 INFO L186 Difference]: Start difference. First operand has 235 places, 181 transitions, 3021 flow. Second operand 56 states and 3233 transitions. [2022-07-13 21:40:07,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 311 transitions, 11632 flow [2022-07-13 21:40:07,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 311 transitions, 9248 flow, removed 1160 selfloop flow, removed 24 redundant places. [2022-07-13 21:40:07,950 INFO L242 Difference]: Finished difference. Result has 289 places, 225 transitions, 4218 flow [2022-07-13 21:40:07,951 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=4218, PETRI_PLACES=289, PETRI_TRANSITIONS=225} [2022-07-13 21:40:07,952 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 219 predicate places. [2022-07-13 21:40:07,952 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 225 transitions, 4218 flow [2022-07-13 21:40:07,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 56.2) internal successors, (1967), 35 states have internal predecessors, (1967), 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) [2022-07-13 21:40:07,953 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:07,953 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:07,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 21:40:08,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:08,165 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:40:08,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:08,165 INFO L85 PathProgramCache]: Analyzing trace with hash -383652693, now seen corresponding path program 5 times [2022-07-13 21:40:08,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:08,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597445933] [2022-07-13 21:40:08,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:08,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:08,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:08,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597445933] [2022-07-13 21:40:08,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597445933] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:08,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42928928] [2022-07-13 21:40:08,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 21:40:08,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:08,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:08,327 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:40:08,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 21:40:08,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-13 21:40:08,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:08,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 21:40:08,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:08,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:08,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42928928] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:08,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:08,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 35 [2022-07-13 21:40:08,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946536398] [2022-07-13 21:40:08,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:08,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-13 21:40:08,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:08,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-13 21:40:08,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2022-07-13 21:40:08,917 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:08,919 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 225 transitions, 4218 flow. Second operand has 35 states, 35 states have (on average 56.2) internal successors, (1967), 35 states have internal predecessors, (1967), 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) [2022-07-13 21:40:08,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:08,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:08,919 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:10,272 INFO L129 PetriNetUnfolder]: 264/1774 cut-off events. [2022-07-13 21:40:10,272 INFO L130 PetriNetUnfolder]: For 239975/240822 co-relation queries the response was YES. [2022-07-13 21:40:10,283 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15851 conditions, 1774 events. 264/1774 cut-off events. For 239975/240822 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 11710 event pairs, 1 based on Foata normal form. 41/1631 useless extension candidates. Maximal degree in co-relation 15720. Up to 411 conditions per place. [2022-07-13 21:40:10,301 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 76 selfloop transitions, 210 changer transitions 50/381 dead transitions. [2022-07-13 21:40:10,302 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 381 transitions, 15902 flow [2022-07-13 21:40:10,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-13 21:40:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-13 21:40:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3697 transitions. [2022-07-13 21:40:10,308 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8252232142857143 [2022-07-13 21:40:10,308 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3697 transitions. [2022-07-13 21:40:10,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3697 transitions. [2022-07-13 21:40:10,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:10,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3697 transitions. [2022-07-13 21:40:10,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 57.765625) internal successors, (3697), 64 states have internal predecessors, (3697), 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) [2022-07-13 21:40:10,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 70.0) internal successors, (4550), 65 states have internal predecessors, (4550), 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) [2022-07-13 21:40:10,321 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 70.0) internal successors, (4550), 65 states have internal predecessors, (4550), 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) [2022-07-13 21:40:10,321 INFO L186 Difference]: Start difference. First operand has 289 places, 225 transitions, 4218 flow. Second operand 64 states and 3697 transitions. [2022-07-13 21:40:10,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 381 transitions, 15902 flow [2022-07-13 21:40:10,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 381 transitions, 13371 flow, removed 1227 selfloop flow, removed 30 redundant places. [2022-07-13 21:40:10,619 INFO L242 Difference]: Finished difference. Result has 344 places, 287 transitions, 6292 flow [2022-07-13 21:40:10,620 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3367, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=6292, PETRI_PLACES=344, PETRI_TRANSITIONS=287} [2022-07-13 21:40:10,620 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 274 predicate places. [2022-07-13 21:40:10,620 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 287 transitions, 6292 flow [2022-07-13 21:40:10,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 56.2) internal successors, (1967), 35 states have internal predecessors, (1967), 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) [2022-07-13 21:40:10,621 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:10,621 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:10,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-13 21:40:10,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:10,823 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:40:10,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:10,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1478098771, now seen corresponding path program 6 times [2022-07-13 21:40:10,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:10,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191731123] [2022-07-13 21:40:10,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:10,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:10,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:10,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191731123] [2022-07-13 21:40:10,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191731123] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:10,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411881946] [2022-07-13 21:40:10,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 21:40:10,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:10,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:10,978 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:40:10,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 21:40:11,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-13 21:40:11,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:11,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 21:40:11,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:11,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:11,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411881946] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:11,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:11,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 36 [2022-07-13 21:40:11,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828606720] [2022-07-13 21:40:11,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:11,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-13 21:40:11,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:11,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-13 21:40:11,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-07-13 21:40:11,456 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:11,457 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 287 transitions, 6292 flow. Second operand has 36 states, 36 states have (on average 56.22222222222222) internal successors, (2024), 36 states have internal predecessors, (2024), 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) [2022-07-13 21:40:11,457 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:11,457 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:11,457 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:13,519 INFO L129 PetriNetUnfolder]: 324/2126 cut-off events. [2022-07-13 21:40:13,520 INFO L130 PetriNetUnfolder]: For 434843/435934 co-relation queries the response was YES. [2022-07-13 21:40:13,539 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22742 conditions, 2126 events. 324/2126 cut-off events. For 434843/435934 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 14381 event pairs, 0 based on Foata normal form. 50/1958 useless extension candidates. Maximal degree in co-relation 22588. Up to 503 conditions per place. [2022-07-13 21:40:13,560 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 74 selfloop transitions, 285 changer transitions 53/457 dead transitions. [2022-07-13 21:40:13,560 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 457 transitions, 23273 flow [2022-07-13 21:40:13,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-13 21:40:13,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-07-13 21:40:13,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 4569 transitions. [2022-07-13 21:40:13,590 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8262206148282097 [2022-07-13 21:40:13,591 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 4569 transitions. [2022-07-13 21:40:13,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 4569 transitions. [2022-07-13 21:40:13,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:13,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 4569 transitions. [2022-07-13 21:40:13,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 57.835443037974684) internal successors, (4569), 79 states have internal predecessors, (4569), 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) [2022-07-13 21:40:13,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 70.0) internal successors, (5600), 80 states have internal predecessors, (5600), 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) [2022-07-13 21:40:13,601 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 70.0) internal successors, (5600), 80 states have internal predecessors, (5600), 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) [2022-07-13 21:40:13,601 INFO L186 Difference]: Start difference. First operand has 344 places, 287 transitions, 6292 flow. Second operand 79 states and 4569 transitions. [2022-07-13 21:40:13,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 457 transitions, 23273 flow [2022-07-13 21:40:14,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 457 transitions, 19353 flow, removed 1884 selfloop flow, removed 33 redundant places. [2022-07-13 21:40:14,083 INFO L242 Difference]: Finished difference. Result has 420 places, 347 transitions, 9055 flow [2022-07-13 21:40:14,084 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=4794, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=9055, PETRI_PLACES=420, PETRI_TRANSITIONS=347} [2022-07-13 21:40:14,084 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 350 predicate places. [2022-07-13 21:40:14,084 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 347 transitions, 9055 flow [2022-07-13 21:40:14,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 56.22222222222222) internal successors, (2024), 36 states have internal predecessors, (2024), 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) [2022-07-13 21:40:14,085 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:14,085 INFO L200 CegarLoopForPetriNet]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:14,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 21:40:14,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 21:40:14,299 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:40:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:14,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1328685143, now seen corresponding path program 7 times [2022-07-13 21:40:14,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:14,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811802873] [2022-07-13 21:40:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:14,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:14,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:14,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:14,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811802873] [2022-07-13 21:40:14,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811802873] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:14,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508233735] [2022-07-13 21:40:14,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 21:40:14,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:14,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:14,598 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:40:14,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 21:40:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:14,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-13 21:40:14,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:14,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:15,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508233735] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:15,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:15,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 57 [2022-07-13 21:40:15,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998412820] [2022-07-13 21:40:15,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:15,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-13 21:40:15,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:15,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-13 21:40:15,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=740, Invalid=2452, Unknown=0, NotChecked=0, Total=3192 [2022-07-13 21:40:15,403 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:15,405 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 347 transitions, 9055 flow. Second operand has 57 states, 57 states have (on average 56.1578947368421) internal successors, (3201), 57 states have internal predecessors, (3201), 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) [2022-07-13 21:40:15,405 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:15,405 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:15,405 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:18,635 INFO L129 PetriNetUnfolder]: 463/3252 cut-off events. [2022-07-13 21:40:18,635 INFO L130 PetriNetUnfolder]: For 1072968/1073464 co-relation queries the response was YES. [2022-07-13 21:40:18,670 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41081 conditions, 3252 events. 463/3252 cut-off events. For 1072968/1073464 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 23024 event pairs, 0 based on Foata normal form. 60/2970 useless extension candidates. Maximal degree in co-relation 40896. Up to 719 conditions per place. [2022-07-13 21:40:18,709 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 108 selfloop transitions, 418 changer transitions 59/630 dead transitions. [2022-07-13 21:40:18,709 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 630 transitions, 41196 flow [2022-07-13 21:40:18,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-07-13 21:40:18,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2022-07-13 21:40:18,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 6299 transitions. [2022-07-13 21:40:18,714 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8255570117955439 [2022-07-13 21:40:18,714 INFO L72 ComplementDD]: Start complementDD. Operand 109 states and 6299 transitions. [2022-07-13 21:40:18,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 109 states and 6299 transitions. [2022-07-13 21:40:18,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:18,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 109 states and 6299 transitions. [2022-07-13 21:40:18,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 110 states, 109 states have (on average 57.788990825688074) internal successors, (6299), 109 states have internal predecessors, (6299), 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) [2022-07-13 21:40:18,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 110 states, 110 states have (on average 70.0) internal successors, (7700), 110 states have internal predecessors, (7700), 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) [2022-07-13 21:40:18,728 INFO L81 ComplementDD]: Finished complementDD. Result has 110 states, 110 states have (on average 70.0) internal successors, (7700), 110 states have internal predecessors, (7700), 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) [2022-07-13 21:40:18,728 INFO L186 Difference]: Start difference. First operand has 420 places, 347 transitions, 9055 flow. Second operand 109 states and 6299 transitions. [2022-07-13 21:40:18,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 630 transitions, 41196 flow [2022-07-13 21:40:19,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 630 transitions, 31275 flow, removed 4842 selfloop flow, removed 46 redundant places. [2022-07-13 21:40:19,730 INFO L242 Difference]: Finished difference. Result has 520 places, 482 transitions, 13557 flow [2022-07-13 21:40:19,731 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=6170, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=109, PETRI_FLOW=13557, PETRI_PLACES=520, PETRI_TRANSITIONS=482} [2022-07-13 21:40:19,731 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 450 predicate places. [2022-07-13 21:40:19,731 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 482 transitions, 13557 flow [2022-07-13 21:40:19,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 56.1578947368421) internal successors, (3201), 57 states have internal predecessors, (3201), 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) [2022-07-13 21:40:19,732 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:19,732 INFO L200 CegarLoopForPetriNet]: trace histogram [20, 20, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:19,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 21:40:19,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 21:40:19,933 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:40:19,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:19,933 INFO L85 PathProgramCache]: Analyzing trace with hash 193963659, now seen corresponding path program 8 times [2022-07-13 21:40:19,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:19,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440587140] [2022-07-13 21:40:19,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:19,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:20,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:20,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440587140] [2022-07-13 21:40:20,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440587140] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:20,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799165530] [2022-07-13 21:40:20,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:40:20,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:20,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:20,491 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:40:20,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 21:40:20,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:40:20,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:20,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-13 21:40:20,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:20,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:21,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799165530] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:21,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:21,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 46 [2022-07-13 21:40:21,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155581577] [2022-07-13 21:40:21,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:21,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-13 21:40:21,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:21,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-13 21:40:21,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=1616, Unknown=0, NotChecked=0, Total=2070 [2022-07-13 21:40:21,087 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:21,088 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 482 transitions, 13557 flow. Second operand has 46 states, 46 states have (on average 56.08695652173913) internal successors, (2580), 46 states have internal predecessors, (2580), 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) [2022-07-13 21:40:21,088 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:21,088 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:21,088 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:24,092 INFO L129 PetriNetUnfolder]: 470/3346 cut-off events. [2022-07-13 21:40:24,092 INFO L130 PetriNetUnfolder]: For 1525213/1525498 co-relation queries the response was YES. [2022-07-13 21:40:24,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44557 conditions, 3346 events. 470/3346 cut-off events. For 1525213/1525498 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 23528 event pairs, 0 based on Foata normal form. 42/3034 useless extension candidates. Maximal degree in co-relation 44338. Up to 733 conditions per place. [2022-07-13 21:40:24,165 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 110 selfloop transitions, 451 changer transitions 5/611 dead transitions. [2022-07-13 21:40:24,165 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 611 transitions, 33249 flow [2022-07-13 21:40:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-13 21:40:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2022-07-13 21:40:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 4893 transitions. [2022-07-13 21:40:24,169 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8223529411764706 [2022-07-13 21:40:24,169 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 4893 transitions. [2022-07-13 21:40:24,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 4893 transitions. [2022-07-13 21:40:24,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:24,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 4893 transitions. [2022-07-13 21:40:24,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 57.56470588235294) internal successors, (4893), 85 states have internal predecessors, (4893), 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) [2022-07-13 21:40:24,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 70.0) internal successors, (6020), 86 states have internal predecessors, (6020), 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) [2022-07-13 21:40:24,179 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 70.0) internal successors, (6020), 86 states have internal predecessors, (6020), 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) [2022-07-13 21:40:24,179 INFO L186 Difference]: Start difference. First operand has 520 places, 482 transitions, 13557 flow. Second operand 85 states and 4893 transitions. [2022-07-13 21:40:24,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 611 transitions, 33249 flow [2022-07-13 21:40:26,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 611 transitions, 24119 flow, removed 4407 selfloop flow, removed 51 redundant places. [2022-07-13 21:40:26,731 INFO L242 Difference]: Finished difference. Result has 543 places, 525 transitions, 11060 flow [2022-07-13 21:40:26,731 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=9121, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=11060, PETRI_PLACES=543, PETRI_TRANSITIONS=525} [2022-07-13 21:40:26,731 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 473 predicate places. [2022-07-13 21:40:26,731 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 525 transitions, 11060 flow [2022-07-13 21:40:26,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 56.08695652173913) internal successors, (2580), 46 states have internal predecessors, (2580), 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) [2022-07-13 21:40:26,732 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:26,732 INFO L200 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:26,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 21:40:26,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 21:40:26,949 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:40:26,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:26,949 INFO L85 PathProgramCache]: Analyzing trace with hash -94218362, now seen corresponding path program 9 times [2022-07-13 21:40:26,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:26,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400408298] [2022-07-13 21:40:26,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:26,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:40:26,998 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:40:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:40:27,088 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:40:27,089 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:40:27,089 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-07-13 21:40:27,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-07-13 21:40:27,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-07-13 21:40:27,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 21:40:27,091 INFO L356 BasicCegarLoop]: Path program histogram: [9, 2, 2, 2, 1, 1] [2022-07-13 21:40:27,095 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-13 21:40:27,095 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 21:40:27,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 09:40:27 BasicIcfg [2022-07-13 21:40:27,217 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 21:40:27,217 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 21:40:27,217 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 21:40:27,218 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 21:40:27,218 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:39:59" (3/4) ... [2022-07-13 21:40:27,219 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-13 21:40:27,330 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-13 21:40:27,330 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 21:40:27,330 INFO L158 Benchmark]: Toolchain (without parser) took 28978.74ms. Allocated memory was 100.7MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 68.4MB in the beginning and 713.2MB in the end (delta: -644.8MB). Peak memory consumption was 475.5MB. Max. memory is 16.1GB. [2022-07-13 21:40:27,331 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 100.7MB. Free memory was 57.4MB in the beginning and 57.4MB in the end (delta: 43.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 21:40:27,331 INFO L158 Benchmark]: CACSL2BoogieTranslator took 400.37ms. Allocated memory was 100.7MB in the beginning and 136.3MB in the end (delta: 35.7MB). Free memory was 68.2MB in the beginning and 102.2MB in the end (delta: -34.0MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2022-07-13 21:40:27,331 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.11ms. Allocated memory is still 136.3MB. Free memory was 102.2MB in the beginning and 100.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 21:40:27,331 INFO L158 Benchmark]: Boogie Preprocessor took 37.22ms. Allocated memory is still 136.3MB. Free memory was 100.1MB in the beginning and 98.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 21:40:27,331 INFO L158 Benchmark]: RCFGBuilder took 279.05ms. Allocated memory is still 136.3MB. Free memory was 98.9MB in the beginning and 87.5MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-13 21:40:27,332 INFO L158 Benchmark]: TraceAbstraction took 28106.57ms. Allocated memory was 136.3MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 86.7MB in the beginning and 753.1MB in the end (delta: -666.4MB). Peak memory consumption was 419.6MB. Max. memory is 16.1GB. [2022-07-13 21:40:27,333 INFO L158 Benchmark]: Witness Printer took 112.60ms. Allocated memory is still 1.2GB. Free memory was 753.1MB in the beginning and 713.2MB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2022-07-13 21:40:27,334 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 100.7MB. Free memory was 57.4MB in the beginning and 57.4MB in the end (delta: 43.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 400.37ms. Allocated memory was 100.7MB in the beginning and 136.3MB in the end (delta: 35.7MB). Free memory was 68.2MB in the beginning and 102.2MB in the end (delta: -34.0MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.11ms. Allocated memory is still 136.3MB. Free memory was 102.2MB in the beginning and 100.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.22ms. Allocated memory is still 136.3MB. Free memory was 100.1MB in the beginning and 98.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 279.05ms. Allocated memory is still 136.3MB. Free memory was 98.9MB in the beginning and 87.5MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 28106.57ms. Allocated memory was 136.3MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 86.7MB in the beginning and 753.1MB in the end (delta: -666.4MB). Peak memory consumption was 419.6MB. Max. memory is 16.1GB. * Witness Printer took 112.60ms. Allocated memory is still 1.2GB. Free memory was 753.1MB in the beginning and 713.2MB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [\old(argc)=49, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6, pthread_create(&id1, ((void *)0), t1, ((void *)0))=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6, pthread_create(&id2, ((void *)0), t2, ((void *)0))=7] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=0] [L716] 0 int condI = i >= (2*20 +6); VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, i=7, id1={5:0}, id2={3:0}, j=8, k=0, k=0] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=0] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=3] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=5] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=5, k=6] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=6] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=7] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=7] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=8] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=7, k=8] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=7, k=9] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=7, k=9] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=8] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=8] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=9] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=9] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=10, k=9] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=11, k=9] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=9, k=11] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=11, k=10] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=11, k=10] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=10] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=10, k=11] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=11, k=11] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=11, k=11] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=11, k=11] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=11] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=11] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=11, k=12] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=13, k=11] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=11, k=13] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=13, k=12] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=13, k=12] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=12] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=12, k=13] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=13, k=13] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=13, k=13] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=13, k=13] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=13] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=13, k=14] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=13, k=14] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=14, k=14] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=14, k=14] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=14, k=14] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=15, k=14] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=14, k=15] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=15, k=14] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=15, k=15] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=15, k=15] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=15, k=15] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=15] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=15, k=16] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=16] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=16] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=16, k=16] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=16, k=16] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=16] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=16] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=17, k=16] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=17, k=17] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=17, k=17] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=17, k=17] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=17, k=18] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=17, k=18] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=17, k=18] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=18, k=18] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=18, k=18] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=18, k=18] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=18] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=18] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=18, k=19] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=19, k=19] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=19, k=19] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=19, k=19] [L719] 0 int condJ = j >= (2*20 +6); VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=45, id1={5:0}, id2={3:0}, j=46, k=19, k=19] [L721] COND TRUE 0 condI || condJ VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=45, id1={5:0}, id2={3:0}, j=46, k=19, k=19] [L722] 0 reach_error() VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=45, id1={5:0}, id2={3:0}, j=46, k=19, k=19] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 27.9s, OverallIterations: 17, TraceHistogramMax: 20, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 18.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1578 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1578 mSDsluCounter, 288 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 393 mSDsCounter, 2129 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2824 IncrementalHoareTripleChecker+Invalid, 4953 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2129 mSolverCounterUnsat, 74 mSDtfsCounter, 2824 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2640 GetRequests, 1836 SyntacticMatches, 4 SemanticMatches, 800 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23091 ImplicationChecksByTransitivity, 9.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13557occurred in iteration=15, InterpolantAutomatonStates: 599, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 2411 NumberOfCodeBlocks, 2411 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 3112 ConstructedInterpolants, 0 QuantifiedInterpolants, 11197 SizeOfPredicates, 138 NumberOfNonLiveVariables, 2144 ConjunctsInSsa, 191 ConjunctsInUnsatCore, 36 InterpolantComputations, 6 PerfectInterpolantSequences, 0/8763 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-13 21:40:27,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE