./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-wmm/safe002_tso.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-wmm/safe002_tso.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 3743abf17a0d3db70a931712c22f305431bb6e8feb7b662539ff9c5190491352 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:49:06,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:49:06,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:49:06,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:49:06,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:49:06,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:49:06,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:49:06,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:49:06,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:49:06,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:49:06,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:49:06,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:49:06,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:49:06,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:49:06,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:49:06,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:49:06,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:49:06,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:49:06,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:49:06,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:49:06,571 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:49:06,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:49:06,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:49:06,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:49:06,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:49:06,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:49:06,580 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:49:06,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:49:06,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:49:06,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:49:06,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:49:06,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:49:06,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:49:06,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:49:06,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:49:06,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:49:06,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:49:06,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:49:06,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:49:06,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:49:06,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:49:06,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:49:06,589 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:49:06,611 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:49:06,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:49:06,612 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:49:06,612 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:49:06,613 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:49:06,613 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:49:06,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:49:06,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:49:06,614 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:49:06,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:49:06,615 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:49:06,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:49:06,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:49:06,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:49:06,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:49:06,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:49:06,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:49:06,616 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:49:06,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:49:06,616 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:49:06,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:49:06,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:49:06,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:49:06,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:49:06,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:49:06,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:49:06,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:49:06,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:49:06,618 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:49:06,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:49:06,619 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:49:06,619 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:49:06,619 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:49:06,619 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3743abf17a0d3db70a931712c22f305431bb6e8feb7b662539ff9c5190491352 [2022-07-13 21:49:06,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:49:06,842 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:49:06,844 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:49:06,845 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:49:06,845 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:49:06,846 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe002_tso.i [2022-07-13 21:49:06,894 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db18cf43d/0f6c23b381e7480e98508b555bba9014/FLAG3fdf0d566 [2022-07-13 21:49:07,323 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:49:07,327 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe002_tso.i [2022-07-13 21:49:07,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db18cf43d/0f6c23b381e7480e98508b555bba9014/FLAG3fdf0d566 [2022-07-13 21:49:07,353 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db18cf43d/0f6c23b381e7480e98508b555bba9014 [2022-07-13 21:49:07,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:49:07,356 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:49:07,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:49:07,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:49:07,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:49:07,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:49:07" (1/1) ... [2022-07-13 21:49:07,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5534a7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:07, skipping insertion in model container [2022-07-13 21:49:07,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:49:07" (1/1) ... [2022-07-13 21:49:07,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:49:07,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:49:07,540 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-wmm/safe002_tso.i[945,958] [2022-07-13 21:49:07,639 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:49:07,644 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:49:07,654 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-wmm/safe002_tso.i[945,958] [2022-07-13 21:49:07,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:49:07,711 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:49:07,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:07 WrapperNode [2022-07-13 21:49:07,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:49:07,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:49:07,713 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:49:07,713 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:49:07,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:07" (1/1) ... [2022-07-13 21:49:07,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:07" (1/1) ... [2022-07-13 21:49:07,764 INFO L137 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2022-07-13 21:49:07,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:49:07,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:49:07,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:49:07,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:49:07,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:07" (1/1) ... [2022-07-13 21:49:07,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:07" (1/1) ... [2022-07-13 21:49:07,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:07" (1/1) ... [2022-07-13 21:49:07,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:07" (1/1) ... [2022-07-13 21:49:07,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:07" (1/1) ... [2022-07-13 21:49:07,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:07" (1/1) ... [2022-07-13 21:49:07,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:07" (1/1) ... [2022-07-13 21:49:07,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:49:07,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:49:07,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:49:07,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:49:07,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:07" (1/1) ... [2022-07-13 21:49:07,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:49:07,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:49:07,803 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 21:49:07,810 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 21:49:07,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:49:07,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 21:49:07,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:49:07,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:49:07,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:49:07,833 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2022-07-13 21:49:07,833 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2022-07-13 21:49:07,833 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2022-07-13 21:49:07,833 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2022-07-13 21:49:07,833 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2022-07-13 21:49:07,833 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2022-07-13 21:49:07,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:49:07,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 21:49:07,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:49:07,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:49:07,835 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 21:49:07,946 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:49:07,947 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:49:08,078 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:49:08,082 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:49:08,083 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-13 21:49:08,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:49:08 BoogieIcfgContainer [2022-07-13 21:49:08,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:49:08,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:49:08,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:49:08,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:49:08,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:49:07" (1/3) ... [2022-07-13 21:49:08,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53533106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:49:08, skipping insertion in model container [2022-07-13 21:49:08,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:07" (2/3) ... [2022-07-13 21:49:08,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53533106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:49:08, skipping insertion in model container [2022-07-13 21:49:08,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:49:08" (3/3) ... [2022-07-13 21:49:08,090 INFO L111 eAbstractionObserver]: Analyzing ICFG safe002_tso.i [2022-07-13 21:49:08,094 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:49:08,101 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:49:08,101 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:49:08,101 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:49:08,145 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:49:08,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 92 transitions, 199 flow [2022-07-13 21:49:08,195 INFO L129 PetriNetUnfolder]: 2/89 cut-off events. [2022-07-13 21:49:08,195 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:49:08,198 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 2/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 68. Up to 2 conditions per place. [2022-07-13 21:49:08,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 92 transitions, 199 flow [2022-07-13 21:49:08,201 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 75 transitions, 159 flow [2022-07-13 21:49:08,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:49:08,211 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@3a29befd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@677b1f03 [2022-07-13 21:49:08,211 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-13 21:49:08,223 INFO L129 PetriNetUnfolder]: 1/74 cut-off events. [2022-07-13 21:49:08,224 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:49:08,224 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:49:08,224 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:49:08,225 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:49:08,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:49:08,228 INFO L85 PathProgramCache]: Analyzing trace with hash -669003802, now seen corresponding path program 1 times [2022-07-13 21:49:08,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:49:08,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059730600] [2022-07-13 21:49:08,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:49:08,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:49:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:49:08,566 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 21:49:08,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:49:08,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059730600] [2022-07-13 21:49:08,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059730600] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:49:08,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:49:08,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:49:08,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206128095] [2022-07-13 21:49:08,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:49:08,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:49:08,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:49:08,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:49:08,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:49:08,610 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 92 [2022-07-13 21:49:08,615 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 159 flow. Second operand has 7 states, 7 states have (on average 71.85714285714286) internal successors, (503), 7 states have internal predecessors, (503), 0 states have call successors, (0), 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 21:49:08,615 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:49:08,616 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 92 [2022-07-13 21:49:08,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:49:08,962 INFO L129 PetriNetUnfolder]: 350/899 cut-off events. [2022-07-13 21:49:08,962 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-13 21:49:08,966 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1524 conditions, 899 events. 350/899 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5319 event pairs, 58 based on Foata normal form. 31/894 useless extension candidates. Maximal degree in co-relation 1486. Up to 188 conditions per place. [2022-07-13 21:49:08,971 INFO L132 encePairwiseOnDemand]: 81/92 looper letters, 26 selfloop transitions, 6 changer transitions 47/135 dead transitions. [2022-07-13 21:49:08,971 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 135 transitions, 446 flow [2022-07-13 21:49:08,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 21:49:08,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-13 21:49:08,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 995 transitions. [2022-07-13 21:49:08,986 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8319397993311036 [2022-07-13 21:49:08,987 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 995 transitions. [2022-07-13 21:49:08,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 995 transitions. [2022-07-13 21:49:08,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:49:08,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 995 transitions. [2022-07-13 21:49:08,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 76.53846153846153) internal successors, (995), 13 states have internal predecessors, (995), 0 states have call successors, (0), 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 21:49:09,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 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 21:49:09,002 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 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 21:49:09,004 INFO L186 Difference]: Start difference. First operand has 84 places, 75 transitions, 159 flow. Second operand 13 states and 995 transitions. [2022-07-13 21:49:09,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 135 transitions, 446 flow [2022-07-13 21:49:09,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 135 transitions, 440 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-13 21:49:09,015 INFO L242 Difference]: Finished difference. Result has 105 places, 78 transitions, 240 flow [2022-07-13 21:49:09,016 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=240, PETRI_PLACES=105, PETRI_TRANSITIONS=78} [2022-07-13 21:49:09,018 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 21 predicate places. [2022-07-13 21:49:09,018 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 78 transitions, 240 flow [2022-07-13 21:49:09,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 71.85714285714286) internal successors, (503), 7 states have internal predecessors, (503), 0 states have call successors, (0), 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 21:49:09,019 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:49:09,019 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:49:09,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:49:09,020 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:49:09,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:49:09,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1081069657, now seen corresponding path program 1 times [2022-07-13 21:49:09,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:49:09,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49089056] [2022-07-13 21:49:09,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:49:09,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:49:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:49:09,129 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 21:49:09,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:49:09,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49089056] [2022-07-13 21:49:09,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49089056] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:49:09,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:49:09,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:49:09,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044552429] [2022-07-13 21:49:09,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:49:09,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:49:09,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:49:09,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:49:09,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:49:09,133 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 92 [2022-07-13 21:49:09,134 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 78 transitions, 240 flow. Second operand has 7 states, 7 states have (on average 72.0) internal successors, (504), 7 states have internal predecessors, (504), 0 states have call successors, (0), 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 21:49:09,134 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:49:09,134 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 92 [2022-07-13 21:49:09,134 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:49:09,358 INFO L129 PetriNetUnfolder]: 194/648 cut-off events. [2022-07-13 21:49:09,358 INFO L130 PetriNetUnfolder]: For 1321/1550 co-relation queries the response was YES. [2022-07-13 21:49:09,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1971 conditions, 648 events. 194/648 cut-off events. For 1321/1550 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3704 event pairs, 4 based on Foata normal form. 19/649 useless extension candidates. Maximal degree in co-relation 1922. Up to 147 conditions per place. [2022-07-13 21:49:09,365 INFO L132 encePairwiseOnDemand]: 79/92 looper letters, 24 selfloop transitions, 15 changer transitions 52/147 dead transitions. [2022-07-13 21:49:09,365 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 147 transitions, 926 flow [2022-07-13 21:49:09,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 21:49:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-13 21:49:09,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 989 transitions. [2022-07-13 21:49:09,367 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8269230769230769 [2022-07-13 21:49:09,367 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 989 transitions. [2022-07-13 21:49:09,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 989 transitions. [2022-07-13 21:49:09,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:49:09,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 989 transitions. [2022-07-13 21:49:09,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 76.07692307692308) internal successors, (989), 13 states have internal predecessors, (989), 0 states have call successors, (0), 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 21:49:09,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 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 21:49:09,372 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 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 21:49:09,372 INFO L186 Difference]: Start difference. First operand has 105 places, 78 transitions, 240 flow. Second operand 13 states and 989 transitions. [2022-07-13 21:49:09,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 147 transitions, 926 flow [2022-07-13 21:49:09,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 147 transitions, 898 flow, removed 12 selfloop flow, removed 4 redundant places. [2022-07-13 21:49:09,383 INFO L242 Difference]: Finished difference. Result has 116 places, 86 transitions, 391 flow [2022-07-13 21:49:09,383 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=391, PETRI_PLACES=116, PETRI_TRANSITIONS=86} [2022-07-13 21:49:09,384 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 32 predicate places. [2022-07-13 21:49:09,384 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 86 transitions, 391 flow [2022-07-13 21:49:09,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 72.0) internal successors, (504), 7 states have internal predecessors, (504), 0 states have call successors, (0), 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 21:49:09,385 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:49:09,385 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:49:09,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:49:09,386 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:49:09,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:49:09,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1069337848, now seen corresponding path program 1 times [2022-07-13 21:49:09,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:49:09,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253904812] [2022-07-13 21:49:09,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:49:09,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:49:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:49:09,479 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 21:49:09,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:49:09,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253904812] [2022-07-13 21:49:09,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253904812] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:49:09,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:49:09,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:49:09,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743189351] [2022-07-13 21:49:09,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:49:09,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:49:09,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:49:09,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:49:09,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:49:09,484 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 92 [2022-07-13 21:49:09,485 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 86 transitions, 391 flow. Second operand has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 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 21:49:09,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:49:09,486 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 92 [2022-07-13 21:49:09,486 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:49:09,599 INFO L129 PetriNetUnfolder]: 106/475 cut-off events. [2022-07-13 21:49:09,599 INFO L130 PetriNetUnfolder]: For 1867/2487 co-relation queries the response was YES. [2022-07-13 21:49:09,601 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1692 conditions, 475 events. 106/475 cut-off events. For 1867/2487 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2767 event pairs, 53 based on Foata normal form. 10/458 useless extension candidates. Maximal degree in co-relation 1629. Up to 109 conditions per place. [2022-07-13 21:49:09,602 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 19 selfloop transitions, 6 changer transitions 25/110 dead transitions. [2022-07-13 21:49:09,602 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 110 transitions, 716 flow [2022-07-13 21:49:09,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:49:09,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 21:49:09,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 549 transitions. [2022-07-13 21:49:09,605 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8524844720496895 [2022-07-13 21:49:09,605 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 549 transitions. [2022-07-13 21:49:09,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 549 transitions. [2022-07-13 21:49:09,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:49:09,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 549 transitions. [2022-07-13 21:49:09,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.42857142857143) internal successors, (549), 7 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:49:09,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 states have internal predecessors, (736), 0 states have call successors, (0), 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 21:49:09,609 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 states have internal predecessors, (736), 0 states have call successors, (0), 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 21:49:09,609 INFO L186 Difference]: Start difference. First operand has 116 places, 86 transitions, 391 flow. Second operand 7 states and 549 transitions. [2022-07-13 21:49:09,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 110 transitions, 716 flow [2022-07-13 21:49:09,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 110 transitions, 676 flow, removed 20 selfloop flow, removed 3 redundant places. [2022-07-13 21:49:09,615 INFO L242 Difference]: Finished difference. Result has 114 places, 82 transitions, 345 flow [2022-07-13 21:49:09,616 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=345, PETRI_PLACES=114, PETRI_TRANSITIONS=82} [2022-07-13 21:49:09,617 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 30 predicate places. [2022-07-13 21:49:09,617 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 82 transitions, 345 flow [2022-07-13 21:49:09,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 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 21:49:09,618 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:49:09,618 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:49:09,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:49:09,618 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:49:09,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:49:09,619 INFO L85 PathProgramCache]: Analyzing trace with hash -821934836, now seen corresponding path program 1 times [2022-07-13 21:49:09,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:49:09,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739484799] [2022-07-13 21:49:09,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:49:09,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:49:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:49:09,736 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 21:49:09,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:49:09,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739484799] [2022-07-13 21:49:09,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739484799] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:49:09,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:49:09,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:49:09,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937829551] [2022-07-13 21:49:09,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:49:09,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:49:09,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:49:09,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:49:09,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:49:09,742 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 92 [2022-07-13 21:49:09,742 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 82 transitions, 345 flow. Second operand has 7 states, 7 states have (on average 72.14285714285714) internal successors, (505), 7 states have internal predecessors, (505), 0 states have call successors, (0), 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 21:49:09,742 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:49:09,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 92 [2022-07-13 21:49:09,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:49:09,870 INFO L129 PetriNetUnfolder]: 72/356 cut-off events. [2022-07-13 21:49:09,870 INFO L130 PetriNetUnfolder]: For 953/1225 co-relation queries the response was YES. [2022-07-13 21:49:09,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 356 events. 72/356 cut-off events. For 953/1225 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1798 event pairs, 5 based on Foata normal form. 11/355 useless extension candidates. Maximal degree in co-relation 1112. Up to 76 conditions per place. [2022-07-13 21:49:09,873 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 23 selfloop transitions, 9 changer transitions 26/114 dead transitions. [2022-07-13 21:49:09,873 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 114 transitions, 729 flow [2022-07-13 21:49:09,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 21:49:09,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-13 21:49:09,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 749 transitions. [2022-07-13 21:49:09,875 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8141304347826087 [2022-07-13 21:49:09,875 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 749 transitions. [2022-07-13 21:49:09,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 749 transitions. [2022-07-13 21:49:09,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:49:09,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 749 transitions. [2022-07-13 21:49:09,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 74.9) internal successors, (749), 10 states have internal predecessors, (749), 0 states have call successors, (0), 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 21:49:09,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 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 21:49:09,881 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 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 21:49:09,881 INFO L186 Difference]: Start difference. First operand has 114 places, 82 transitions, 345 flow. Second operand 10 states and 749 transitions. [2022-07-13 21:49:09,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 114 transitions, 729 flow [2022-07-13 21:49:09,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 114 transitions, 634 flow, removed 30 selfloop flow, removed 11 redundant places. [2022-07-13 21:49:09,887 INFO L242 Difference]: Finished difference. Result has 116 places, 81 transitions, 313 flow [2022-07-13 21:49:09,888 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=313, PETRI_PLACES=116, PETRI_TRANSITIONS=81} [2022-07-13 21:49:09,889 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 32 predicate places. [2022-07-13 21:49:09,892 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 81 transitions, 313 flow [2022-07-13 21:49:09,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 72.14285714285714) internal successors, (505), 7 states have internal predecessors, (505), 0 states have call successors, (0), 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 21:49:09,892 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:49:09,893 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:49:09,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:49:09,893 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:49:09,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:49:09,894 INFO L85 PathProgramCache]: Analyzing trace with hash 883716798, now seen corresponding path program 2 times [2022-07-13 21:49:09,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:49:09,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230826429] [2022-07-13 21:49:09,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:49:09,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:49:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:49:09,978 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 21:49:09,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:49:09,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230826429] [2022-07-13 21:49:09,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230826429] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:49:09,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:49:09,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:49:09,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744317859] [2022-07-13 21:49:09,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:49:09,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:49:09,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:49:09,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:49:09,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:49:09,981 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 92 [2022-07-13 21:49:09,982 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 81 transitions, 313 flow. Second operand has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 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 21:49:09,982 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:49:09,982 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 92 [2022-07-13 21:49:09,982 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:49:10,065 INFO L129 PetriNetUnfolder]: 25/218 cut-off events. [2022-07-13 21:49:10,065 INFO L130 PetriNetUnfolder]: For 566/787 co-relation queries the response was YES. [2022-07-13 21:49:10,066 INFO L84 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 218 events. 25/218 cut-off events. For 566/787 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 944 event pairs, 12 based on Foata normal form. 9/218 useless extension candidates. Maximal degree in co-relation 607. Up to 35 conditions per place. [2022-07-13 21:49:10,066 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 16 selfloop transitions, 5 changer transitions 13/94 dead transitions. [2022-07-13 21:49:10,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 94 transitions, 499 flow [2022-07-13 21:49:10,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:49:10,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 21:49:10,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 540 transitions. [2022-07-13 21:49:10,068 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8385093167701864 [2022-07-13 21:49:10,068 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 540 transitions. [2022-07-13 21:49:10,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 540 transitions. [2022-07-13 21:49:10,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:49:10,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 540 transitions. [2022-07-13 21:49:10,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.14285714285714) internal successors, (540), 7 states have internal predecessors, (540), 0 states have call successors, (0), 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 21:49:10,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 states have internal predecessors, (736), 0 states have call successors, (0), 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 21:49:10,071 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 states have internal predecessors, (736), 0 states have call successors, (0), 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 21:49:10,071 INFO L186 Difference]: Start difference. First operand has 116 places, 81 transitions, 313 flow. Second operand 7 states and 540 transitions. [2022-07-13 21:49:10,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 94 transitions, 499 flow [2022-07-13 21:49:10,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 94 transitions, 470 flow, removed 12 selfloop flow, removed 7 redundant places. [2022-07-13 21:49:10,074 INFO L242 Difference]: Finished difference. Result has 113 places, 79 transitions, 299 flow [2022-07-13 21:49:10,074 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=299, PETRI_PLACES=113, PETRI_TRANSITIONS=79} [2022-07-13 21:49:10,075 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 29 predicate places. [2022-07-13 21:49:10,075 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 79 transitions, 299 flow [2022-07-13 21:49:10,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 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 21:49:10,075 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:49:10,075 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:49:10,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:49:10,076 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:49:10,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:49:10,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1927095409, now seen corresponding path program 1 times [2022-07-13 21:49:10,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:49:10,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592691510] [2022-07-13 21:49:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:49:10,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:49:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:49:10,134 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 21:49:10,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:49:10,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592691510] [2022-07-13 21:49:10,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592691510] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:49:10,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:49:10,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:49:10,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815193359] [2022-07-13 21:49:10,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:49:10,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:49:10,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:49:10,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:49:10,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:49:10,137 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 92 [2022-07-13 21:49:10,138 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 79 transitions, 299 flow. Second operand has 7 states, 7 states have (on average 75.14285714285714) internal successors, (526), 7 states have internal predecessors, (526), 0 states have call successors, (0), 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 21:49:10,138 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:49:10,138 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 92 [2022-07-13 21:49:10,138 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:49:10,208 INFO L129 PetriNetUnfolder]: 13/154 cut-off events. [2022-07-13 21:49:10,209 INFO L130 PetriNetUnfolder]: For 251/281 co-relation queries the response was YES. [2022-07-13 21:49:10,209 INFO L84 FinitePrefix]: Finished finitePrefix Result has 392 conditions, 154 events. 13/154 cut-off events. For 251/281 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 430 event pairs, 8 based on Foata normal form. 5/150 useless extension candidates. Maximal degree in co-relation 369. Up to 22 conditions per place. [2022-07-13 21:49:10,210 INFO L132 encePairwiseOnDemand]: 85/92 looper letters, 14 selfloop transitions, 2 changer transitions 11/85 dead transitions. [2022-07-13 21:49:10,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 85 transitions, 381 flow [2022-07-13 21:49:10,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 21:49:10,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 21:49:10,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 609 transitions. [2022-07-13 21:49:10,212 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8274456521739131 [2022-07-13 21:49:10,212 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 609 transitions. [2022-07-13 21:49:10,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 609 transitions. [2022-07-13 21:49:10,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:49:10,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 609 transitions. [2022-07-13 21:49:10,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 76.125) internal successors, (609), 8 states have internal predecessors, (609), 0 states have call successors, (0), 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 21:49:10,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 92.0) internal successors, (828), 9 states have internal predecessors, (828), 0 states have call successors, (0), 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 21:49:10,215 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 92.0) internal successors, (828), 9 states have internal predecessors, (828), 0 states have call successors, (0), 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 21:49:10,215 INFO L186 Difference]: Start difference. First operand has 113 places, 79 transitions, 299 flow. Second operand 8 states and 609 transitions. [2022-07-13 21:49:10,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 85 transitions, 381 flow [2022-07-13 21:49:10,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 85 transitions, 348 flow, removed 8 selfloop flow, removed 8 redundant places. [2022-07-13 21:49:10,217 INFO L242 Difference]: Finished difference. Result has 113 places, 73 transitions, 228 flow [2022-07-13 21:49:10,217 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=228, PETRI_PLACES=113, PETRI_TRANSITIONS=73} [2022-07-13 21:49:10,218 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 29 predicate places. [2022-07-13 21:49:10,218 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 73 transitions, 228 flow [2022-07-13 21:49:10,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.14285714285714) internal successors, (526), 7 states have internal predecessors, (526), 0 states have call successors, (0), 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 21:49:10,218 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:49:10,219 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:49:10,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:49:10,219 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:49:10,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:49:10,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2069639245, now seen corresponding path program 2 times [2022-07-13 21:49:10,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:49:10,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676577970] [2022-07-13 21:49:10,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:49:10,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:49:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:49:10,273 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 21:49:10,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:49:10,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676577970] [2022-07-13 21:49:10,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676577970] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:49:10,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:49:10,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:49:10,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761939225] [2022-07-13 21:49:10,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:49:10,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:49:10,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:49:10,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:49:10,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:49:10,276 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-07-13 21:49:10,276 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 73 transitions, 228 flow. Second operand has 6 states, 6 states have (on average 76.66666666666667) internal successors, (460), 6 states have internal predecessors, (460), 0 states have call successors, (0), 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 21:49:10,276 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:49:10,276 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-07-13 21:49:10,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:49:10,358 INFO L129 PetriNetUnfolder]: 113/361 cut-off events. [2022-07-13 21:49:10,359 INFO L130 PetriNetUnfolder]: For 213/214 co-relation queries the response was YES. [2022-07-13 21:49:10,360 INFO L84 FinitePrefix]: Finished finitePrefix Result has 758 conditions, 361 events. 113/361 cut-off events. For 213/214 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1722 event pairs, 14 based on Foata normal form. 8/354 useless extension candidates. Maximal degree in co-relation 735. Up to 90 conditions per place. [2022-07-13 21:49:10,361 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 14 selfloop transitions, 6 changer transitions 19/99 dead transitions. [2022-07-13 21:49:10,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 99 transitions, 360 flow [2022-07-13 21:49:10,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:49:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:49:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 716 transitions. [2022-07-13 21:49:10,363 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8647342995169082 [2022-07-13 21:49:10,363 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 716 transitions. [2022-07-13 21:49:10,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 716 transitions. [2022-07-13 21:49:10,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:49:10,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 716 transitions. [2022-07-13 21:49:10,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.55555555555556) internal successors, (716), 9 states have internal predecessors, (716), 0 states have call successors, (0), 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 21:49:10,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 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 21:49:10,366 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 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 21:49:10,366 INFO L186 Difference]: Start difference. First operand has 113 places, 73 transitions, 228 flow. Second operand 9 states and 716 transitions. [2022-07-13 21:49:10,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 99 transitions, 360 flow [2022-07-13 21:49:10,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 99 transitions, 322 flow, removed 8 selfloop flow, removed 11 redundant places. [2022-07-13 21:49:10,369 INFO L242 Difference]: Finished difference. Result has 109 places, 76 transitions, 246 flow [2022-07-13 21:49:10,369 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=246, PETRI_PLACES=109, PETRI_TRANSITIONS=76} [2022-07-13 21:49:10,369 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 25 predicate places. [2022-07-13 21:49:10,369 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 76 transitions, 246 flow [2022-07-13 21:49:10,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 76.66666666666667) internal successors, (460), 6 states have internal predecessors, (460), 0 states have call successors, (0), 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 21:49:10,370 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:49:10,370 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:49:10,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:49:10,370 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:49:10,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:49:10,371 INFO L85 PathProgramCache]: Analyzing trace with hash 98531652, now seen corresponding path program 1 times [2022-07-13 21:49:10,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:49:10,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947743431] [2022-07-13 21:49:10,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:49:10,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:49:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:49:10,439 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 21:49:10,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:49:10,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947743431] [2022-07-13 21:49:10,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947743431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:49:10,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:49:10,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:49:10,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081418570] [2022-07-13 21:49:10,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:49:10,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:49:10,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:49:10,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:49:10,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:49:10,441 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-07-13 21:49:10,441 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 76 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 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 21:49:10,441 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:49:10,441 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-07-13 21:49:10,441 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:49:10,527 INFO L129 PetriNetUnfolder]: 60/238 cut-off events. [2022-07-13 21:49:10,528 INFO L130 PetriNetUnfolder]: For 365/399 co-relation queries the response was YES. [2022-07-13 21:49:10,528 INFO L84 FinitePrefix]: Finished finitePrefix Result has 704 conditions, 238 events. 60/238 cut-off events. For 365/399 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 863 event pairs, 4 based on Foata normal form. 12/245 useless extension candidates. Maximal degree in co-relation 683. Up to 79 conditions per place. [2022-07-13 21:49:10,529 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 14 selfloop transitions, 9 changer transitions 19/102 dead transitions. [2022-07-13 21:49:10,529 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 102 transitions, 511 flow [2022-07-13 21:49:10,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 21:49:10,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-13 21:49:10,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 794 transitions. [2022-07-13 21:49:10,531 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8630434782608696 [2022-07-13 21:49:10,531 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 794 transitions. [2022-07-13 21:49:10,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 794 transitions. [2022-07-13 21:49:10,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:49:10,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 794 transitions. [2022-07-13 21:49:10,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 79.4) internal successors, (794), 10 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 21:49:10,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 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 21:49:10,535 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 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 21:49:10,535 INFO L186 Difference]: Start difference. First operand has 109 places, 76 transitions, 246 flow. Second operand 10 states and 794 transitions. [2022-07-13 21:49:10,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 102 transitions, 511 flow [2022-07-13 21:49:10,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 102 transitions, 485 flow, removed 7 selfloop flow, removed 6 redundant places. [2022-07-13 21:49:10,537 INFO L242 Difference]: Finished difference. Result has 114 places, 79 transitions, 312 flow [2022-07-13 21:49:10,538 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=312, PETRI_PLACES=114, PETRI_TRANSITIONS=79} [2022-07-13 21:49:10,538 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 30 predicate places. [2022-07-13 21:49:10,538 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 79 transitions, 312 flow [2022-07-13 21:49:10,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 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 21:49:10,539 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:49:10,539 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:49:10,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 21:49:10,539 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:49:10,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:49:10,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1560518903, now seen corresponding path program 1 times [2022-07-13 21:49:10,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:49:10,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349427138] [2022-07-13 21:49:10,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:49:10,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:49:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:49:10,597 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 21:49:10,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:49:10,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349427138] [2022-07-13 21:49:10,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349427138] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:49:10,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:49:10,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 21:49:10,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739573633] [2022-07-13 21:49:10,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:49:10,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 21:49:10,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:49:10,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 21:49:10,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:49:10,600 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-07-13 21:49:10,601 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 79 transitions, 312 flow. Second operand has 8 states, 8 states have (on average 76.5) internal successors, (612), 8 states have internal predecessors, (612), 0 states have call successors, (0), 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 21:49:10,601 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:49:10,601 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-07-13 21:49:10,601 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:49:10,691 INFO L129 PetriNetUnfolder]: 17/126 cut-off events. [2022-07-13 21:49:10,691 INFO L130 PetriNetUnfolder]: For 429/475 co-relation queries the response was YES. [2022-07-13 21:49:10,691 INFO L84 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 126 events. 17/126 cut-off events. For 429/475 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 243 event pairs, 0 based on Foata normal form. 14/139 useless extension candidates. Maximal degree in co-relation 379. Up to 31 conditions per place. [2022-07-13 21:49:10,692 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 8 selfloop transitions, 12 changer transitions 13/93 dead transitions. [2022-07-13 21:49:10,692 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 93 transitions, 508 flow [2022-07-13 21:49:10,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 21:49:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-13 21:49:10,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 860 transitions. [2022-07-13 21:49:10,694 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.849802371541502 [2022-07-13 21:49:10,694 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 860 transitions. [2022-07-13 21:49:10,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 860 transitions. [2022-07-13 21:49:10,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:49:10,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 860 transitions. [2022-07-13 21:49:10,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 78.18181818181819) internal successors, (860), 11 states have internal predecessors, (860), 0 states have call successors, (0), 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 21:49:10,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 92.0) internal successors, (1104), 12 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 21:49:10,698 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 92.0) internal successors, (1104), 12 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 21:49:10,698 INFO L186 Difference]: Start difference. First operand has 114 places, 79 transitions, 312 flow. Second operand 11 states and 860 transitions. [2022-07-13 21:49:10,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 93 transitions, 508 flow [2022-07-13 21:49:10,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 93 transitions, 393 flow, removed 47 selfloop flow, removed 14 redundant places. [2022-07-13 21:49:10,700 INFO L242 Difference]: Finished difference. Result has 112 places, 79 transitions, 282 flow [2022-07-13 21:49:10,701 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=282, PETRI_PLACES=112, PETRI_TRANSITIONS=79} [2022-07-13 21:49:10,701 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 28 predicate places. [2022-07-13 21:49:10,701 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 79 transitions, 282 flow [2022-07-13 21:49:10,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 76.5) internal successors, (612), 8 states have internal predecessors, (612), 0 states have call successors, (0), 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 21:49:10,702 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:49:10,702 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:49:10,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 21:49:10,702 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:49:10,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:49:10,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1434165886, now seen corresponding path program 1 times [2022-07-13 21:49:10,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:49:10,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492593909] [2022-07-13 21:49:10,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:49:10,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:49:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:49:10,753 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 21:49:10,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:49:10,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492593909] [2022-07-13 21:49:10,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492593909] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:49:10,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:49:10,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:49:10,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350402899] [2022-07-13 21:49:10,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:49:10,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:49:10,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:49:10,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:49:10,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:49:10,756 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-07-13 21:49:10,757 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 79 transitions, 282 flow. Second operand has 7 states, 7 states have (on average 76.85714285714286) internal successors, (538), 7 states have internal predecessors, (538), 0 states have call successors, (0), 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 21:49:10,757 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:49:10,757 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-07-13 21:49:10,757 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:49:10,805 INFO L129 PetriNetUnfolder]: 6/94 cut-off events. [2022-07-13 21:49:10,805 INFO L130 PetriNetUnfolder]: For 89/95 co-relation queries the response was YES. [2022-07-13 21:49:10,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 94 events. 6/94 cut-off events. For 89/95 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 91 event pairs, 0 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 189. Up to 11 conditions per place. [2022-07-13 21:49:10,806 INFO L132 encePairwiseOnDemand]: 86/92 looper letters, 0 selfloop transitions, 0 changer transitions 78/78 dead transitions. [2022-07-13 21:49:10,806 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 78 transitions, 308 flow [2022-07-13 21:49:10,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:49:10,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 21:49:10,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 539 transitions. [2022-07-13 21:49:10,807 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8369565217391305 [2022-07-13 21:49:10,807 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 539 transitions. [2022-07-13 21:49:10,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 539 transitions. [2022-07-13 21:49:10,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:49:10,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 539 transitions. [2022-07-13 21:49:10,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 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 21:49:10,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 states have internal predecessors, (736), 0 states have call successors, (0), 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 21:49:10,819 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 states have internal predecessors, (736), 0 states have call successors, (0), 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 21:49:10,819 INFO L186 Difference]: Start difference. First operand has 112 places, 79 transitions, 282 flow. Second operand 7 states and 539 transitions. [2022-07-13 21:49:10,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 78 transitions, 308 flow [2022-07-13 21:49:10,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 78 transitions, 226 flow, removed 22 selfloop flow, removed 15 redundant places. [2022-07-13 21:49:10,820 INFO L242 Difference]: Finished difference. Result has 97 places, 0 transitions, 0 flow [2022-07-13 21:49:10,820 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=97, PETRI_TRANSITIONS=0} [2022-07-13 21:49:10,821 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 13 predicate places. [2022-07-13 21:49:10,821 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 0 transitions, 0 flow [2022-07-13 21:49:10,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.85714285714286) internal successors, (538), 7 states have internal predecessors, (538), 0 states have call successors, (0), 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 21:49:10,823 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-07-13 21:49:10,824 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-07-13 21:49:10,824 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-13 21:49:10,824 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-07-13 21:49:10,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 21:49:10,824 INFO L356 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2022-07-13 21:49:10,826 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-13 21:49:10,826 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 21:49:10,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 09:49:10 BasicIcfg [2022-07-13 21:49:10,830 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 21:49:10,830 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 21:49:10,830 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 21:49:10,830 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 21:49:10,831 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:49:08" (3/4) ... [2022-07-13 21:49:10,832 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-13 21:49:10,838 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2022-07-13 21:49:10,838 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2022-07-13 21:49:10,839 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2022-07-13 21:49:10,841 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2022-07-13 21:49:10,841 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-07-13 21:49:10,841 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-13 21:49:10,842 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-13 21:49:10,859 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-13 21:49:10,860 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 21:49:10,860 INFO L158 Benchmark]: Toolchain (without parser) took 3503.99ms. Allocated memory was 121.6MB in the beginning and 153.1MB in the end (delta: 31.5MB). Free memory was 83.6MB in the beginning and 119.7MB in the end (delta: -36.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 21:49:10,860 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 121.6MB. Free memory was 92.7MB in the beginning and 92.7MB in the end (delta: 18.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 21:49:10,860 INFO L158 Benchmark]: CACSL2BoogieTranslator took 354.02ms. Allocated memory is still 121.6MB. Free memory was 83.2MB in the beginning and 84.5MB in the end (delta: -1.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-13 21:49:10,861 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.94ms. Allocated memory is still 121.6MB. Free memory was 84.5MB in the beginning and 82.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 21:49:10,861 INFO L158 Benchmark]: Boogie Preprocessor took 13.80ms. Allocated memory is still 121.6MB. Free memory was 82.4MB in the beginning and 81.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 21:49:10,861 INFO L158 Benchmark]: RCFGBuilder took 305.42ms. Allocated memory is still 121.6MB. Free memory was 81.0MB in the beginning and 68.9MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-13 21:49:10,861 INFO L158 Benchmark]: TraceAbstraction took 2744.01ms. Allocated memory was 121.6MB in the beginning and 153.1MB in the end (delta: 31.5MB). Free memory was 68.2MB in the beginning and 122.8MB in the end (delta: -54.6MB). Peak memory consumption was 63.6MB. Max. memory is 16.1GB. [2022-07-13 21:49:10,862 INFO L158 Benchmark]: Witness Printer took 29.60ms. Allocated memory is still 153.1MB. Free memory was 122.8MB in the beginning and 119.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-13 21:49:10,863 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 121.6MB. Free memory was 92.7MB in the beginning and 92.7MB in the end (delta: 18.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 354.02ms. Allocated memory is still 121.6MB. Free memory was 83.2MB in the beginning and 84.5MB in the end (delta: -1.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.94ms. Allocated memory is still 121.6MB. Free memory was 84.5MB in the beginning and 82.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 13.80ms. Allocated memory is still 121.6MB. Free memory was 82.4MB in the beginning and 81.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 305.42ms. Allocated memory is still 121.6MB. Free memory was 81.0MB in the beginning and 68.9MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 2744.01ms. Allocated memory was 121.6MB in the beginning and 153.1MB in the end (delta: 31.5MB). Free memory was 68.2MB in the beginning and 122.8MB in the end (delta: -54.6MB). Peak memory consumption was 63.6MB. Max. memory is 16.1GB. * Witness Printer took 29.60ms. Allocated memory is still 153.1MB. Free memory was 122.8MB in the beginning and 119.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 115 locations, 4 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: 2.7s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 317 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 317 mSDsluCounter, 501 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 498 mSDsCounter, 73 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 610 IncrementalHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 73 mSolverCounterUnsat, 129 mSDtfsCounter, 610 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=391occurred in iteration=2, InterpolantAutomatonStates: 95, 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 614 NumberOfCodeBlocks, 614 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 604 ConstructedInterpolants, 0 QuantifiedInterpolants, 2318 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-13 21:49:10,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE