./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:12:45,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:12:45,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:12:45,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:12:45,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:12:45,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:12:45,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:12:45,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:12:45,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:12:45,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:12:45,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:12:45,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:12:45,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:12:45,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:12:45,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:12:45,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:12:45,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:12:45,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:12:45,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:12:45,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:12:45,595 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:12:45,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:12:45,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:12:45,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:12:45,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:12:45,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:12:45,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:12:45,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:12:45,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:12:45,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:12:45,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:12:45,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:12:45,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:12:45,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:12:45,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:12:45,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:12:45,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:12:45,614 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:12:45,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:12:45,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:12:45,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:12:45,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:12:45,625 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:12:45,656 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:12:45,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:12:45,657 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:12:45,657 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:12:45,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:12:45,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:12:45,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:12:45,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:12:45,659 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:12:45,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:12:45,660 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:12:45,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:12:45,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:12:45,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:12:45,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:12:45,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:12:45,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:12:45,662 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:12:45,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:12:45,662 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:12:45,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:12:45,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:12:45,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:12:45,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:12:45,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:12:45,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:12:45,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:12:45,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:12:45,664 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:12:45,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:12:45,665 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:12:45,665 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:12:45,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:12:45,665 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf [2022-07-21 09:12:46,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:12:46,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:12:46,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:12:46,054 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:12:46,055 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:12:46,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2022-07-21 09:12:46,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a72db5a3c/943ca801cf9c492e80d58ae936f0cf0a/FLAG4deb20f59 [2022-07-21 09:12:46,539 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:12:46,540 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2022-07-21 09:12:46,548 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a72db5a3c/943ca801cf9c492e80d58ae936f0cf0a/FLAG4deb20f59 [2022-07-21 09:12:46,564 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a72db5a3c/943ca801cf9c492e80d58ae936f0cf0a [2022-07-21 09:12:46,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:12:46,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:12:46,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:12:46,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:12:46,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:12:46,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:12:46" (1/1) ... [2022-07-21 09:12:46,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b0b8808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:12:46, skipping insertion in model container [2022-07-21 09:12:46,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:12:46" (1/1) ... [2022-07-21 09:12:46,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:12:46,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:12:46,779 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c[2591,2604] [2022-07-21 09:12:46,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:12:46,842 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:12:46,875 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c[2591,2604] [2022-07-21 09:12:46,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:12:46,889 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:12:46,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:12:46 WrapperNode [2022-07-21 09:12:46,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:12:46,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:12:46,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:12:46,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:12:46,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:12:46" (1/1) ... [2022-07-21 09:12:46,917 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:12:46" (1/1) ... [2022-07-21 09:12:46,938 INFO L137 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-07-21 09:12:46,938 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:12:46,939 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:12:46,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:12:46,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:12:46,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:12:46" (1/1) ... [2022-07-21 09:12:46,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:12:46" (1/1) ... [2022-07-21 09:12:46,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:12:46" (1/1) ... [2022-07-21 09:12:46,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:12:46" (1/1) ... [2022-07-21 09:12:46,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:12:46" (1/1) ... [2022-07-21 09:12:46,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:12:46" (1/1) ... [2022-07-21 09:12:46,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:12:46" (1/1) ... [2022-07-21 09:12:46,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:12:46,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:12:46,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:12:46,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:12:46,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:12:46" (1/1) ... [2022-07-21 09:12:46,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:12:46,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:12:47,007 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 09:12:47,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 09:12:47,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:12:47,051 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:12:47,051 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:12:47,051 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:12:47,052 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:12:47,052 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-21 09:12:47,052 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-21 09:12:47,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:12:47,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:12:47,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:12:47,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:12:47,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:12:47,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:12:47,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:12:47,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:12:47,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:12:47,055 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:12:47,118 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:12:47,120 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:12:47,336 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:12:47,383 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:12:47,387 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 09:12:47,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:12:47 BoogieIcfgContainer [2022-07-21 09:12:47,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:12:47,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:12:47,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:12:47,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:12:47,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:12:46" (1/3) ... [2022-07-21 09:12:47,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0366d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:12:47, skipping insertion in model container [2022-07-21 09:12:47,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:12:46" (2/3) ... [2022-07-21 09:12:47,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0366d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:12:47, skipping insertion in model container [2022-07-21 09:12:47,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:12:47" (3/3) ... [2022-07-21 09:12:47,398 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2022-07-21 09:12:47,402 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:12:47,409 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:12:47,410 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:12:47,410 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:12:47,471 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 09:12:47,500 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 97 transitions, 218 flow [2022-07-21 09:12:47,543 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2022-07-21 09:12:47,546 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 09:12:47,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 7/94 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2022-07-21 09:12:47,551 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 97 transitions, 218 flow [2022-07-21 09:12:47,556 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 83 transitions, 184 flow [2022-07-21 09:12:47,574 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:12:47,581 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@90c3187, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@45ddf9f8 [2022-07-21 09:12:47,581 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 09:12:47,631 INFO L129 PetriNetUnfolder]: 7/82 cut-off events. [2022-07-21 09:12:47,632 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 09:12:47,632 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:47,632 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:12:47,633 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)] === [2022-07-21 09:12:47,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:47,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1408875064, now seen corresponding path program 1 times [2022-07-21 09:12:47,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:47,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116630949] [2022-07-21 09:12:47,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:47,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:47,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:47,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116630949] [2022-07-21 09:12:47,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116630949] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:12:47,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:12:47,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:12:47,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244251124] [2022-07-21 09:12:47,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:12:47,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:12:47,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:47,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:12:47,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:12:47,965 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 97 [2022-07-21 09:12:47,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 184 flow. Second operand has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:47,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:47,970 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 97 [2022-07-21 09:12:47,971 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:48,057 INFO L129 PetriNetUnfolder]: 26/138 cut-off events. [2022-07-21 09:12:48,057 INFO L130 PetriNetUnfolder]: For 28/29 co-relation queries the response was YES. [2022-07-21 09:12:48,058 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 138 events. 26/138 cut-off events. For 28/29 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 254 event pairs, 7 based on Foata normal form. 25/148 useless extension candidates. Maximal degree in co-relation 127. Up to 39 conditions per place. [2022-07-21 09:12:48,060 INFO L132 encePairwiseOnDemand]: 93/97 looper letters, 9 selfloop transitions, 0 changer transitions 1/79 dead transitions. [2022-07-21 09:12:48,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 194 flow [2022-07-21 09:12:48,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:12:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:12:48,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 179 transitions. [2022-07-21 09:12:48,076 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9226804123711341 [2022-07-21 09:12:48,077 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 179 transitions. [2022-07-21 09:12:48,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 179 transitions. [2022-07-21 09:12:48,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:48,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 179 transitions. [2022-07-21 09:12:48,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:48,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:48,092 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:48,094 INFO L186 Difference]: Start difference. First operand has 86 places, 83 transitions, 184 flow. Second operand 2 states and 179 transitions. [2022-07-21 09:12:48,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 194 flow [2022-07-21 09:12:48,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 182 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-21 09:12:48,101 INFO L242 Difference]: Finished difference. Result has 81 places, 78 transitions, 162 flow [2022-07-21 09:12:48,103 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=162, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2022-07-21 09:12:48,110 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2022-07-21 09:12:48,111 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 162 flow [2022-07-21 09:12:48,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:48,112 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:48,112 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:12:48,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:12:48,113 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)] === [2022-07-21 09:12:48,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:48,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1685090523, now seen corresponding path program 1 times [2022-07-21 09:12:48,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:48,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817473446] [2022-07-21 09:12:48,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:48,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:48,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:48,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817473446] [2022-07-21 09:12:48,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817473446] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:12:48,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:12:48,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:12:48,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683604475] [2022-07-21 09:12:48,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:12:48,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:12:48,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:48,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:12:48,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:12:48,391 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 97 [2022-07-21 09:12:48,391 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:48,396 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:48,397 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 97 [2022-07-21 09:12:48,397 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:48,518 INFO L129 PetriNetUnfolder]: 34/192 cut-off events. [2022-07-21 09:12:48,518 INFO L130 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2022-07-21 09:12:48,519 INFO L84 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 192 events. 34/192 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 483 event pairs, 1 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 266. Up to 44 conditions per place. [2022-07-21 09:12:48,524 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 25 selfloop transitions, 7 changer transitions 4/99 dead transitions. [2022-07-21 09:12:48,524 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 284 flow [2022-07-21 09:12:48,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:12:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:12:48,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2022-07-21 09:12:48,530 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2022-07-21 09:12:48,530 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2022-07-21 09:12:48,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2022-07-21 09:12:48,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:48,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2022-07-21 09:12:48,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:48,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:48,535 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:48,536 INFO L186 Difference]: Start difference. First operand has 81 places, 78 transitions, 162 flow. Second operand 6 states and 493 transitions. [2022-07-21 09:12:48,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 284 flow [2022-07-21 09:12:48,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:12:48,539 INFO L242 Difference]: Finished difference. Result has 88 places, 83 transitions, 202 flow [2022-07-21 09:12:48,539 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2022-07-21 09:12:48,540 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2022-07-21 09:12:48,540 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 202 flow [2022-07-21 09:12:48,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:48,541 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:48,541 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:12:48,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:12:48,541 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)] === [2022-07-21 09:12:48,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:48,542 INFO L85 PathProgramCache]: Analyzing trace with hash -187386445, now seen corresponding path program 1 times [2022-07-21 09:12:48,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:48,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355453149] [2022-07-21 09:12:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:48,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:48,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:48,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355453149] [2022-07-21 09:12:48,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355453149] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:12:48,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:12:48,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:12:48,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363034685] [2022-07-21 09:12:48,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:12:48,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:12:48,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:48,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:12:48,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:12:48,746 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-21 09:12:48,746 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:48,746 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:48,746 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-21 09:12:48,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:49,021 INFO L129 PetriNetUnfolder]: 297/760 cut-off events. [2022-07-21 09:12:49,021 INFO L130 PetriNetUnfolder]: For 129/134 co-relation queries the response was YES. [2022-07-21 09:12:49,024 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 760 events. 297/760 cut-off events. For 129/134 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4076 event pairs, 54 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 1452. Up to 254 conditions per place. [2022-07-21 09:12:49,028 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 53 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2022-07-21 09:12:49,028 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 486 flow [2022-07-21 09:12:49,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:12:49,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:12:49,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 636 transitions. [2022-07-21 09:12:49,030 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8195876288659794 [2022-07-21 09:12:49,030 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 636 transitions. [2022-07-21 09:12:49,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 636 transitions. [2022-07-21 09:12:49,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:49,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 636 transitions. [2022-07-21 09:12:49,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.5) internal successors, (636), 8 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:49,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:49,035 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:49,035 INFO L186 Difference]: Start difference. First operand has 88 places, 83 transitions, 202 flow. Second operand 8 states and 636 transitions. [2022-07-21 09:12:49,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 486 flow [2022-07-21 09:12:49,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 482 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-21 09:12:49,039 INFO L242 Difference]: Finished difference. Result has 96 places, 98 transitions, 330 flow [2022-07-21 09:12:49,039 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=330, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2022-07-21 09:12:49,040 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 10 predicate places. [2022-07-21 09:12:49,040 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 330 flow [2022-07-21 09:12:49,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:49,041 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:49,041 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:12:49,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:12:49,041 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)] === [2022-07-21 09:12:49,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:49,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1580608891, now seen corresponding path program 2 times [2022-07-21 09:12:49,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:49,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887163389] [2022-07-21 09:12:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:49,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:49,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:49,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887163389] [2022-07-21 09:12:49,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887163389] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:12:49,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:12:49,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:12:49,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065105151] [2022-07-21 09:12:49,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:12:49,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:12:49,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:49,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:12:49,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:12:49,147 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-21 09:12:49,148 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:49,148 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:49,148 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-21 09:12:49,148 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:49,328 INFO L129 PetriNetUnfolder]: 371/890 cut-off events. [2022-07-21 09:12:49,328 INFO L130 PetriNetUnfolder]: For 450/454 co-relation queries the response was YES. [2022-07-21 09:12:49,331 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 890 events. 371/890 cut-off events. For 450/454 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4794 event pairs, 71 based on Foata normal form. 18/843 useless extension candidates. Maximal degree in co-relation 2091. Up to 395 conditions per place. [2022-07-21 09:12:49,335 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 53 selfloop transitions, 21 changer transitions 2/133 dead transitions. [2022-07-21 09:12:49,335 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 133 transitions, 628 flow [2022-07-21 09:12:49,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:12:49,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:12:49,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 485 transitions. [2022-07-21 09:12:49,337 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2022-07-21 09:12:49,337 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 485 transitions. [2022-07-21 09:12:49,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 485 transitions. [2022-07-21 09:12:49,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:49,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 485 transitions. [2022-07-21 09:12:49,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:49,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:49,344 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:49,344 INFO L186 Difference]: Start difference. First operand has 96 places, 98 transitions, 330 flow. Second operand 6 states and 485 transitions. [2022-07-21 09:12:49,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 133 transitions, 628 flow [2022-07-21 09:12:49,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 133 transitions, 621 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:12:49,353 INFO L242 Difference]: Finished difference. Result has 104 places, 108 transitions, 469 flow [2022-07-21 09:12:49,354 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=469, PETRI_PLACES=104, PETRI_TRANSITIONS=108} [2022-07-21 09:12:49,355 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2022-07-21 09:12:49,355 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 108 transitions, 469 flow [2022-07-21 09:12:49,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:49,356 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:49,356 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:12:49,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:12:49,356 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)] === [2022-07-21 09:12:49,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:49,357 INFO L85 PathProgramCache]: Analyzing trace with hash -599492455, now seen corresponding path program 3 times [2022-07-21 09:12:49,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:49,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437153691] [2022-07-21 09:12:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:49,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:49,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:49,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437153691] [2022-07-21 09:12:49,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437153691] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:12:49,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:12:49,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:12:49,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444056386] [2022-07-21 09:12:49,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:12:49,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:12:49,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:49,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:12:49,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:12:49,485 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-21 09:12:49,486 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 108 transitions, 469 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:49,486 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:49,486 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-21 09:12:49,486 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:49,848 INFO L129 PetriNetUnfolder]: 576/1349 cut-off events. [2022-07-21 09:12:49,848 INFO L130 PetriNetUnfolder]: For 998/1042 co-relation queries the response was YES. [2022-07-21 09:12:49,852 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3291 conditions, 1349 events. 576/1349 cut-off events. For 998/1042 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8232 event pairs, 89 based on Foata normal form. 19/1297 useless extension candidates. Maximal degree in co-relation 3275. Up to 389 conditions per place. [2022-07-21 09:12:49,860 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 70 selfloop transitions, 38 changer transitions 2/167 dead transitions. [2022-07-21 09:12:49,860 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 167 transitions, 917 flow [2022-07-21 09:12:49,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:12:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:12:49,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 731 transitions. [2022-07-21 09:12:49,862 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8373424971363116 [2022-07-21 09:12:49,862 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 731 transitions. [2022-07-21 09:12:49,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 731 transitions. [2022-07-21 09:12:49,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:49,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 731 transitions. [2022-07-21 09:12:49,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.22222222222223) internal successors, (731), 9 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:49,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:49,866 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:49,866 INFO L186 Difference]: Start difference. First operand has 104 places, 108 transitions, 469 flow. Second operand 9 states and 731 transitions. [2022-07-21 09:12:49,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 167 transitions, 917 flow [2022-07-21 09:12:49,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 167 transitions, 871 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-07-21 09:12:49,873 INFO L242 Difference]: Finished difference. Result has 116 places, 121 transitions, 671 flow [2022-07-21 09:12:49,873 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=671, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2022-07-21 09:12:49,874 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 30 predicate places. [2022-07-21 09:12:49,874 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 671 flow [2022-07-21 09:12:49,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:49,875 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:49,875 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:12:49,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:12:49,875 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)] === [2022-07-21 09:12:49,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:49,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1430121317, now seen corresponding path program 4 times [2022-07-21 09:12:49,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:49,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976937317] [2022-07-21 09:12:49,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:49,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:49,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:49,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976937317] [2022-07-21 09:12:49,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976937317] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:12:49,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:12:49,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:12:49,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164489413] [2022-07-21 09:12:49,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:12:49,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:12:49,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:49,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:12:49,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:12:49,968 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-21 09:12:49,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 671 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:49,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:49,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-21 09:12:49,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:50,236 INFO L129 PetriNetUnfolder]: 594/1403 cut-off events. [2022-07-21 09:12:50,236 INFO L130 PetriNetUnfolder]: For 2229/2242 co-relation queries the response was YES. [2022-07-21 09:12:50,241 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3959 conditions, 1403 events. 594/1403 cut-off events. For 2229/2242 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8721 event pairs, 155 based on Foata normal form. 16/1316 useless extension candidates. Maximal degree in co-relation 3938. Up to 527 conditions per place. [2022-07-21 09:12:50,249 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 64 selfloop transitions, 37 changer transitions 2/160 dead transitions. [2022-07-21 09:12:50,249 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 160 transitions, 1072 flow [2022-07-21 09:12:50,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:12:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:12:50,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 639 transitions. [2022-07-21 09:12:50,252 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8234536082474226 [2022-07-21 09:12:50,252 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 639 transitions. [2022-07-21 09:12:50,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 639 transitions. [2022-07-21 09:12:50,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:50,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 639 transitions. [2022-07-21 09:12:50,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.875) internal successors, (639), 8 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:50,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:50,256 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:50,256 INFO L186 Difference]: Start difference. First operand has 116 places, 121 transitions, 671 flow. Second operand 8 states and 639 transitions. [2022-07-21 09:12:50,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 160 transitions, 1072 flow [2022-07-21 09:12:50,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 160 transitions, 1052 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-07-21 09:12:50,270 INFO L242 Difference]: Finished difference. Result has 124 places, 128 transitions, 818 flow [2022-07-21 09:12:50,270 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=818, PETRI_PLACES=124, PETRI_TRANSITIONS=128} [2022-07-21 09:12:50,273 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 38 predicate places. [2022-07-21 09:12:50,273 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 128 transitions, 818 flow [2022-07-21 09:12:50,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:50,275 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:50,275 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:12:50,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 09:12:50,276 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)] === [2022-07-21 09:12:50,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:50,276 INFO L85 PathProgramCache]: Analyzing trace with hash -829555728, now seen corresponding path program 1 times [2022-07-21 09:12:50,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:50,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535554007] [2022-07-21 09:12:50,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:50,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:50,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:50,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535554007] [2022-07-21 09:12:50,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535554007] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:12:50,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:12:50,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:12:50,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306848538] [2022-07-21 09:12:50,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:12:50,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:12:50,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:50,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:12:50,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:12:50,441 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-21 09:12:50,442 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 128 transitions, 818 flow. Second operand has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:50,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:50,442 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-21 09:12:50,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:50,800 INFO L129 PetriNetUnfolder]: 671/1538 cut-off events. [2022-07-21 09:12:50,800 INFO L130 PetriNetUnfolder]: For 3129/3163 co-relation queries the response was YES. [2022-07-21 09:12:50,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4709 conditions, 1538 events. 671/1538 cut-off events. For 3129/3163 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9727 event pairs, 131 based on Foata normal form. 28/1481 useless extension candidates. Maximal degree in co-relation 4684. Up to 579 conditions per place. [2022-07-21 09:12:50,816 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 82 selfloop transitions, 30 changer transitions 2/171 dead transitions. [2022-07-21 09:12:50,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 171 transitions, 1312 flow [2022-07-21 09:12:50,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:12:50,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:12:50,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 562 transitions. [2022-07-21 09:12:50,818 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8276877761413843 [2022-07-21 09:12:50,818 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 562 transitions. [2022-07-21 09:12:50,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 562 transitions. [2022-07-21 09:12:50,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:50,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 562 transitions. [2022-07-21 09:12:50,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.28571428571429) internal successors, (562), 7 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:50,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:50,822 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:50,822 INFO L186 Difference]: Start difference. First operand has 124 places, 128 transitions, 818 flow. Second operand 7 states and 562 transitions. [2022-07-21 09:12:50,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 171 transitions, 1312 flow [2022-07-21 09:12:50,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 171 transitions, 1228 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-07-21 09:12:50,835 INFO L242 Difference]: Finished difference. Result has 129 places, 131 transitions, 889 flow [2022-07-21 09:12:50,836 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=889, PETRI_PLACES=129, PETRI_TRANSITIONS=131} [2022-07-21 09:12:50,836 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 43 predicate places. [2022-07-21 09:12:50,837 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 131 transitions, 889 flow [2022-07-21 09:12:50,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:50,837 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:50,837 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:12:50,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 09:12:50,838 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)] === [2022-07-21 09:12:50,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:50,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1761321142, now seen corresponding path program 2 times [2022-07-21 09:12:50,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:50,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077498392] [2022-07-21 09:12:50,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:50,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:51,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:51,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077498392] [2022-07-21 09:12:51,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077498392] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:12:51,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:12:51,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:12:51,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308694937] [2022-07-21 09:12:51,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:12:51,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:12:51,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:51,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:12:51,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:12:51,102 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-07-21 09:12:51,103 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 131 transitions, 889 flow. Second operand has 8 states, 8 states have (on average 71.25) internal successors, (570), 8 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:51,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:51,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-07-21 09:12:51,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:51,900 INFO L129 PetriNetUnfolder]: 1609/3278 cut-off events. [2022-07-21 09:12:51,900 INFO L130 PetriNetUnfolder]: For 9722/9800 co-relation queries the response was YES. [2022-07-21 09:12:51,916 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11498 conditions, 3278 events. 1609/3278 cut-off events. For 9722/9800 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23364 event pairs, 512 based on Foata normal form. 9/3005 useless extension candidates. Maximal degree in co-relation 11470. Up to 1864 conditions per place. [2022-07-21 09:12:51,940 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 114 selfloop transitions, 60 changer transitions 6/235 dead transitions. [2022-07-21 09:12:51,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 235 transitions, 2127 flow [2022-07-21 09:12:51,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:12:51,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:12:51,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 722 transitions. [2022-07-21 09:12:51,944 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.827033218785796 [2022-07-21 09:12:51,944 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 722 transitions. [2022-07-21 09:12:51,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 722 transitions. [2022-07-21 09:12:51,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:51,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 722 transitions. [2022-07-21 09:12:51,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 80.22222222222223) internal successors, (722), 9 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:51,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:51,948 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:51,948 INFO L186 Difference]: Start difference. First operand has 129 places, 131 transitions, 889 flow. Second operand 9 states and 722 transitions. [2022-07-21 09:12:51,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 235 transitions, 2127 flow [2022-07-21 09:12:51,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 235 transitions, 2076 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 09:12:51,983 INFO L242 Difference]: Finished difference. Result has 142 places, 168 transitions, 1575 flow [2022-07-21 09:12:51,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1575, PETRI_PLACES=142, PETRI_TRANSITIONS=168} [2022-07-21 09:12:51,984 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 56 predicate places. [2022-07-21 09:12:51,984 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 168 transitions, 1575 flow [2022-07-21 09:12:51,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 71.25) internal successors, (570), 8 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:51,985 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:51,985 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:12:51,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 09:12:51,985 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)] === [2022-07-21 09:12:51,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:51,986 INFO L85 PathProgramCache]: Analyzing trace with hash 133163824, now seen corresponding path program 1 times [2022-07-21 09:12:51,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:51,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665948389] [2022-07-21 09:12:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:51,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:52,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:52,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:52,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665948389] [2022-07-21 09:12:52,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665948389] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:12:52,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:12:52,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:12:52,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120624976] [2022-07-21 09:12:52,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:12:52,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:12:52,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:52,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:12:52,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:12:52,109 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-21 09:12:52,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 168 transitions, 1575 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:52,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:52,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-21 09:12:52,110 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:52,637 INFO L129 PetriNetUnfolder]: 1323/3152 cut-off events. [2022-07-21 09:12:52,637 INFO L130 PetriNetUnfolder]: For 11002/11304 co-relation queries the response was YES. [2022-07-21 09:12:52,654 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11658 conditions, 3152 events. 1323/3152 cut-off events. For 11002/11304 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25036 event pairs, 262 based on Foata normal form. 96/3141 useless extension candidates. Maximal degree in co-relation 11623. Up to 1104 conditions per place. [2022-07-21 09:12:52,674 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 64 selfloop transitions, 65 changer transitions 2/200 dead transitions. [2022-07-21 09:12:52,674 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 200 transitions, 1998 flow [2022-07-21 09:12:52,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:12:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:12:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2022-07-21 09:12:52,676 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-07-21 09:12:52,676 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2022-07-21 09:12:52,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2022-07-21 09:12:52,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:52,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2022-07-21 09:12:52,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:52,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:52,679 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:52,680 INFO L186 Difference]: Start difference. First operand has 142 places, 168 transitions, 1575 flow. Second operand 6 states and 486 transitions. [2022-07-21 09:12:52,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 200 transitions, 1998 flow [2022-07-21 09:12:52,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 200 transitions, 1946 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 09:12:52,728 INFO L242 Difference]: Finished difference. Result has 147 places, 173 transitions, 1774 flow [2022-07-21 09:12:52,729 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1774, PETRI_PLACES=147, PETRI_TRANSITIONS=173} [2022-07-21 09:12:52,729 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 61 predicate places. [2022-07-21 09:12:52,730 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 173 transitions, 1774 flow [2022-07-21 09:12:52,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:52,730 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:52,730 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:12:52,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 09:12:52,731 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)] === [2022-07-21 09:12:52,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:52,731 INFO L85 PathProgramCache]: Analyzing trace with hash -695560766, now seen corresponding path program 2 times [2022-07-21 09:12:52,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:52,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425170770] [2022-07-21 09:12:52,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:52,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:52,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:52,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425170770] [2022-07-21 09:12:52,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425170770] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:12:52,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:12:52,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:12:52,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794728906] [2022-07-21 09:12:52,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:12:52,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:12:52,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:52,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:12:52,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:12:52,802 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-21 09:12:52,803 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 173 transitions, 1774 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:52,803 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:52,803 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-21 09:12:52,803 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:53,216 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([270] L80-->L83: Formula: (and (= (+ v_~L~0_14 1) v_~L~0_15) (= v_~q~0_13 (+ v_~q~0_14 v_~M~0_20))) InVars {~q~0=v_~q~0_14, ~M~0=v_~M~0_20, ~L~0=v_~L~0_15} OutVars{~q~0=v_~q~0_13, ~M~0=v_~M~0_20, ~L~0=v_~L~0_14, thread3Thread1of1ForFork2_#t~post2=|v_thread3Thread1of1ForFork2_#t~post2_1|} AuxVars[] AssignedVars[~L~0, ~q~0, thread3Thread1of1ForFork2_#t~post2][177], [Black: 122#(or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 190#(<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0), Black: 192#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), Black: 123#(and (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 131#(and (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 187#(= (+ ~N~0 (* (- 1) ~L~0)) 0), Black: 129#(and (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 127#(and (= ~N~0 ~L~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), 155#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 225#true, 106#true, Black: 140#(= (+ ~N~0 (* (- 1) ~L~0)) 0), Black: 144#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (= ~N~0 ~L~0) (<= 1 thread1Thread1of1ForFork0_~cond~0) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0)), 185#true, Black: 142#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 67#L99-4true, 7#L83true, 103#true, Black: 211#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0) (or (and (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)) (and (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1)) (= thread2Thread1of1ForFork1_~cond~1 0)))), Black: 213#(and (= ~N~0 ~L~0) (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)), Black: 207#(and (<= 1 thread2Thread1of1ForFork1_~cond~1) (<= (div thread2Thread1of1ForFork1_~cond~1 256) 0)), Black: 215#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0) (or (and (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)) (and (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1)) (= thread2Thread1of1ForFork1_~cond~1 0))) (or (< (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 217#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)), 120#true, Black: 209#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), 83#L64true, Black: 154#(or (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0))), Black: 157#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), Black: 159#(and (= ~N~0 ~L~0) (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), 6#L46-1true, Black: 163#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 150#true, Black: 227#(or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 231#(and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 233#(and (= thread2Thread1of1ForFork1_~cond~1 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 175#(<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0), Black: 180#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 109#(and (= ~p~0 0) (= ~q~0 0)), Black: 176#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 238#true]) [2022-07-21 09:12:53,217 INFO L384 tUnfolder$Statistics]: this new event has 51 ancestors and is cut-off event [2022-07-21 09:12:53,217 INFO L387 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-07-21 09:12:53,217 INFO L387 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-07-21 09:12:53,217 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-07-21 09:12:53,414 INFO L129 PetriNetUnfolder]: 1649/3706 cut-off events. [2022-07-21 09:12:53,415 INFO L130 PetriNetUnfolder]: For 18241/18640 co-relation queries the response was YES. [2022-07-21 09:12:53,491 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15719 conditions, 3706 events. 1649/3706 cut-off events. For 18241/18640 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 29394 event pairs, 179 based on Foata normal form. 127/3712 useless extension candidates. Maximal degree in co-relation 15682. Up to 1319 conditions per place. [2022-07-21 09:12:53,513 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 123 selfloop transitions, 105 changer transitions 2/299 dead transitions. [2022-07-21 09:12:53,514 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 299 transitions, 3896 flow [2022-07-21 09:12:53,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:12:53,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:12:53,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 491 transitions. [2022-07-21 09:12:53,516 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8436426116838488 [2022-07-21 09:12:53,516 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 491 transitions. [2022-07-21 09:12:53,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 491 transitions. [2022-07-21 09:12:53,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:53,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 491 transitions. [2022-07-21 09:12:53,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.83333333333333) internal successors, (491), 6 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:53,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:53,519 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:53,520 INFO L186 Difference]: Start difference. First operand has 147 places, 173 transitions, 1774 flow. Second operand 6 states and 491 transitions. [2022-07-21 09:12:53,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 299 transitions, 3896 flow [2022-07-21 09:12:53,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 299 transitions, 3726 flow, removed 17 selfloop flow, removed 2 redundant places. [2022-07-21 09:12:53,603 INFO L242 Difference]: Finished difference. Result has 154 places, 232 transitions, 2918 flow [2022-07-21 09:12:53,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1701, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2918, PETRI_PLACES=154, PETRI_TRANSITIONS=232} [2022-07-21 09:12:53,604 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 68 predicate places. [2022-07-21 09:12:53,605 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 232 transitions, 2918 flow [2022-07-21 09:12:53,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:53,605 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:53,605 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:12:53,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 09:12:53,606 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:12:53,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:53,606 INFO L85 PathProgramCache]: Analyzing trace with hash 140530238, now seen corresponding path program 3 times [2022-07-21 09:12:53,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:53,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427990799] [2022-07-21 09:12:53,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:53,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:53,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:53,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427990799] [2022-07-21 09:12:53,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427990799] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:12:53,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:12:53,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:12:53,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792620918] [2022-07-21 09:12:53,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:12:53,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:12:53,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:53,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:12:53,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:12:53,699 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-21 09:12:53,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 232 transitions, 2918 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:53,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:53,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-21 09:12:53,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:54,254 INFO L129 PetriNetUnfolder]: 1623/3657 cut-off events. [2022-07-21 09:12:54,255 INFO L130 PetriNetUnfolder]: For 20724/20780 co-relation queries the response was YES. [2022-07-21 09:12:54,279 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16891 conditions, 3657 events. 1623/3657 cut-off events. For 20724/20780 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 28431 event pairs, 389 based on Foata normal form. 14/3562 useless extension candidates. Maximal degree in co-relation 16850. Up to 2302 conditions per place. [2022-07-21 09:12:54,302 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 121 selfloop transitions, 71 changer transitions 1/253 dead transitions. [2022-07-21 09:12:54,302 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 253 transitions, 3482 flow [2022-07-21 09:12:54,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:12:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:12:54,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 405 transitions. [2022-07-21 09:12:54,304 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-07-21 09:12:54,304 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 405 transitions. [2022-07-21 09:12:54,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 405 transitions. [2022-07-21 09:12:54,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:54,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 405 transitions. [2022-07-21 09:12:54,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:54,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:54,307 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:54,307 INFO L186 Difference]: Start difference. First operand has 154 places, 232 transitions, 2918 flow. Second operand 5 states and 405 transitions. [2022-07-21 09:12:54,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 253 transitions, 3482 flow [2022-07-21 09:12:54,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 253 transitions, 3448 flow, removed 17 selfloop flow, removed 0 redundant places. [2022-07-21 09:12:54,387 INFO L242 Difference]: Finished difference. Result has 160 places, 235 transitions, 3178 flow [2022-07-21 09:12:54,387 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2849, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3178, PETRI_PLACES=160, PETRI_TRANSITIONS=235} [2022-07-21 09:12:54,388 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 74 predicate places. [2022-07-21 09:12:54,388 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 235 transitions, 3178 flow [2022-07-21 09:12:54,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:54,388 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:54,389 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:12:54,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 09:12:54,389 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:12:54,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:54,389 INFO L85 PathProgramCache]: Analyzing trace with hash 540547268, now seen corresponding path program 3 times [2022-07-21 09:12:54,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:54,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615687236] [2022-07-21 09:12:54,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:54,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:54,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:54,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615687236] [2022-07-21 09:12:54,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615687236] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:12:54,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:12:54,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:12:54,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73932278] [2022-07-21 09:12:54,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:12:54,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:12:54,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:54,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:12:54,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:12:54,516 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-21 09:12:54,516 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 235 transitions, 3178 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:54,516 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:54,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-21 09:12:54,517 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:54,885 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([270] L80-->L83: Formula: (and (= (+ v_~L~0_14 1) v_~L~0_15) (= v_~q~0_13 (+ v_~q~0_14 v_~M~0_20))) InVars {~q~0=v_~q~0_14, ~M~0=v_~M~0_20, ~L~0=v_~L~0_15} OutVars{~q~0=v_~q~0_13, ~M~0=v_~M~0_20, ~L~0=v_~L~0_14, thread3Thread1of1ForFork2_#t~post2=|v_thread3Thread1of1ForFork2_#t~post2_1|} AuxVars[] AssignedVars[~L~0, ~q~0, thread3Thread1of1ForFork2_#t~post2][179], [Black: 190#(<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0), Black: 122#(or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 260#(and (= ~N~0 ~L~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 192#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), Black: 123#(and (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 131#(and (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 257#(and (= ~N~0 ~L~0) (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 187#(= (+ ~N~0 (* (- 1) ~L~0)) 0), Black: 129#(and (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 127#(and (= ~N~0 ~L~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), 155#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 140#(= (+ ~N~0 (* (- 1) ~L~0)) 0), 106#true, Black: 144#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (= ~N~0 ~L~0) (<= 1 thread1Thread1of1ForFork0_~cond~0) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0)), 185#true, Black: 142#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 67#L99-4true, 7#L83true, 103#true, Black: 211#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0) (or (and (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)) (and (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1)) (= thread2Thread1of1ForFork1_~cond~1 0)))), Black: 213#(and (= ~N~0 ~L~0) (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)), Black: 207#(and (<= 1 thread2Thread1of1ForFork1_~cond~1) (<= (div thread2Thread1of1ForFork1_~cond~1 256) 0)), 264#true, Black: 215#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0) (or (and (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)) (and (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1)) (= thread2Thread1of1ForFork1_~cond~1 0))) (or (< (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 217#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)), 120#true, Black: 209#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), 83#L64true, Black: 154#(or (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0))), Black: 157#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), Black: 159#(and (= ~N~0 ~L~0) (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 163#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), 6#L46-1true, Black: 150#true, 254#true, Black: 227#(or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 231#(and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 233#(and (= thread2Thread1of1ForFork1_~cond~1 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 175#(<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0), Black: 180#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 109#(and (= ~p~0 0) (= ~q~0 0)), Black: 176#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 240#(or (and (= (* (- 1) thread2Thread1of1ForFork1_~cond~1) 0) (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (and (= (+ (* (- 1) thread2Thread1of1ForFork1_~cond~1) 1) 0) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))))), 238#true, Black: 244#(and (<= (+ 2 (* (div ~N~0 4294967296) 4294967296)) ~N~0) (= thread2Thread1of1ForFork1_~cond~1 1)), Black: 242#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 246#(and (= thread1Thread1of1ForFork0_~cond~0 1) (<= (+ 2 (* (div ~N~0 4294967296) 4294967296)) ~N~0) (= thread2Thread1of1ForFork1_~cond~1 1))]) [2022-07-21 09:12:54,885 INFO L384 tUnfolder$Statistics]: this new event has 51 ancestors and is cut-off event [2022-07-21 09:12:54,885 INFO L387 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-07-21 09:12:54,885 INFO L387 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-07-21 09:12:54,885 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-07-21 09:12:55,162 INFO L129 PetriNetUnfolder]: 1860/4309 cut-off events. [2022-07-21 09:12:55,162 INFO L130 PetriNetUnfolder]: For 24798/25309 co-relation queries the response was YES. [2022-07-21 09:12:55,198 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19625 conditions, 4309 events. 1860/4309 cut-off events. For 24798/25309 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 36049 event pairs, 229 based on Foata normal form. 143/4307 useless extension candidates. Maximal degree in co-relation 19581. Up to 1429 conditions per place. [2022-07-21 09:12:55,226 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 95 selfloop transitions, 131 changer transitions 3/298 dead transitions. [2022-07-21 09:12:55,226 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 298 transitions, 4405 flow [2022-07-21 09:12:55,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:12:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:12:55,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 414 transitions. [2022-07-21 09:12:55,228 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8536082474226804 [2022-07-21 09:12:55,228 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 414 transitions. [2022-07-21 09:12:55,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 414 transitions. [2022-07-21 09:12:55,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:55,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 414 transitions. [2022-07-21 09:12:55,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:55,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:55,231 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:55,231 INFO L186 Difference]: Start difference. First operand has 160 places, 235 transitions, 3178 flow. Second operand 5 states and 414 transitions. [2022-07-21 09:12:55,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 298 transitions, 4405 flow [2022-07-21 09:12:55,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 298 transitions, 4325 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-07-21 09:12:55,330 INFO L242 Difference]: Finished difference. Result has 166 places, 266 transitions, 4115 flow [2022-07-21 09:12:55,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4115, PETRI_PLACES=166, PETRI_TRANSITIONS=266} [2022-07-21 09:12:55,333 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 80 predicate places. [2022-07-21 09:12:55,333 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 266 transitions, 4115 flow [2022-07-21 09:12:55,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:55,333 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:55,334 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:12:55,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 09:12:55,334 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:12:55,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:55,335 INFO L85 PathProgramCache]: Analyzing trace with hash -346743856, now seen corresponding path program 4 times [2022-07-21 09:12:55,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:55,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042392557] [2022-07-21 09:12:55,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:55,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:55,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:55,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042392557] [2022-07-21 09:12:55,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042392557] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:12:55,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:12:55,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:12:55,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318103287] [2022-07-21 09:12:55,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:12:55,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:12:55,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:55,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:12:55,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:12:55,489 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-21 09:12:55,490 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 266 transitions, 4115 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:55,490 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:55,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-21 09:12:55,490 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:56,319 INFO L129 PetriNetUnfolder]: 1950/4789 cut-off events. [2022-07-21 09:12:56,319 INFO L130 PetriNetUnfolder]: For 35999/36593 co-relation queries the response was YES. [2022-07-21 09:12:56,340 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22906 conditions, 4789 events. 1950/4789 cut-off events. For 35999/36593 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 42268 event pairs, 237 based on Foata normal form. 151/4795 useless extension candidates. Maximal degree in co-relation 22859. Up to 1635 conditions per place. [2022-07-21 09:12:56,364 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 84 selfloop transitions, 167 changer transitions 9/329 dead transitions. [2022-07-21 09:12:56,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 329 transitions, 5409 flow [2022-07-21 09:12:56,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:12:56,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:12:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 495 transitions. [2022-07-21 09:12:56,366 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8505154639175257 [2022-07-21 09:12:56,366 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 495 transitions. [2022-07-21 09:12:56,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 495 transitions. [2022-07-21 09:12:56,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:56,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 495 transitions. [2022-07-21 09:12:56,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.5) internal successors, (495), 6 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:56,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:56,370 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:56,370 INFO L186 Difference]: Start difference. First operand has 166 places, 266 transitions, 4115 flow. Second operand 6 states and 495 transitions. [2022-07-21 09:12:56,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 329 transitions, 5409 flow [2022-07-21 09:12:56,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 329 transitions, 5381 flow, removed 14 selfloop flow, removed 0 redundant places. [2022-07-21 09:12:56,505 INFO L242 Difference]: Finished difference. Result has 174 places, 286 transitions, 4936 flow [2022-07-21 09:12:56,505 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4936, PETRI_PLACES=174, PETRI_TRANSITIONS=286} [2022-07-21 09:12:56,506 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 88 predicate places. [2022-07-21 09:12:56,506 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 286 transitions, 4936 flow [2022-07-21 09:12:56,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:56,507 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:56,507 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:12:56,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 09:12:56,507 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:12:56,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:56,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1395758734, now seen corresponding path program 5 times [2022-07-21 09:12:56,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:56,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836676544] [2022-07-21 09:12:56,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:56,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:56,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:56,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836676544] [2022-07-21 09:12:56,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836676544] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:12:56,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281598964] [2022-07-21 09:12:56,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:12:56,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:12:56,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:12:56,627 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:12:56,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:12:56,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:12:56,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:12:56,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 09:12:56,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:12:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:56,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:12:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:57,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281598964] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:12:57,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:12:57,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-07-21 09:12:57,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848454371] [2022-07-21 09:12:57,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:12:57,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:12:57,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:57,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:12:57,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:12:57,207 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-07-21 09:12:57,207 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 286 transitions, 4936 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:57,207 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:57,207 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-07-21 09:12:57,207 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:58,635 INFO L129 PetriNetUnfolder]: 3895/9307 cut-off events. [2022-07-21 09:12:58,635 INFO L130 PetriNetUnfolder]: For 81067/81102 co-relation queries the response was YES. [2022-07-21 09:12:58,692 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46008 conditions, 9307 events. 3895/9307 cut-off events. For 81067/81102 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 89826 event pairs, 453 based on Foata normal form. 34/9161 useless extension candidates. Maximal degree in co-relation 45957. Up to 1710 conditions per place. [2022-07-21 09:12:58,748 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 388 selfloop transitions, 167 changer transitions 4/614 dead transitions. [2022-07-21 09:12:58,748 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 614 transitions, 11347 flow [2022-07-21 09:12:58,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:12:58,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:12:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 573 transitions. [2022-07-21 09:12:58,750 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8438880706921944 [2022-07-21 09:12:58,750 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 573 transitions. [2022-07-21 09:12:58,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 573 transitions. [2022-07-21 09:12:58,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:58,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 573 transitions. [2022-07-21 09:12:58,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.85714285714286) internal successors, (573), 7 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:58,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:58,753 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:58,753 INFO L186 Difference]: Start difference. First operand has 174 places, 286 transitions, 4936 flow. Second operand 7 states and 573 transitions. [2022-07-21 09:12:58,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 614 transitions, 11347 flow [2022-07-21 09:12:59,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 614 transitions, 11207 flow, removed 70 selfloop flow, removed 0 redundant places. [2022-07-21 09:12:59,025 INFO L242 Difference]: Finished difference. Result has 185 places, 413 transitions, 7730 flow [2022-07-21 09:12:59,025 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=4896, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7730, PETRI_PLACES=185, PETRI_TRANSITIONS=413} [2022-07-21 09:12:59,026 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 99 predicate places. [2022-07-21 09:12:59,026 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 413 transitions, 7730 flow [2022-07-21 09:12:59,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:59,026 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:59,026 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:12:59,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 09:12:59,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 09:12:59,227 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:12:59,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:59,228 INFO L85 PathProgramCache]: Analyzing trace with hash 559220224, now seen corresponding path program 6 times [2022-07-21 09:12:59,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:59,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554664479] [2022-07-21 09:12:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:59,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:59,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:59,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554664479] [2022-07-21 09:12:59,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554664479] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:12:59,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095478136] [2022-07-21 09:12:59,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:12:59,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:12:59,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:12:59,372 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:12:59,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:12:59,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-21 09:12:59,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:12:59,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:12:59,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:12:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:59,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:12:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:59,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095478136] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:12:59,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:12:59,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-07-21 09:12:59,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127636906] [2022-07-21 09:12:59,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:12:59,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:12:59,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:59,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:12:59,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:12:59,883 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-07-21 09:12:59,884 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 413 transitions, 7730 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:59,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:59,884 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-07-21 09:12:59,884 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:01,530 INFO L129 PetriNetUnfolder]: 4074/9522 cut-off events. [2022-07-21 09:13:01,531 INFO L130 PetriNetUnfolder]: For 106901/106901 co-relation queries the response was YES. [2022-07-21 09:13:01,581 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54464 conditions, 9522 events. 4074/9522 cut-off events. For 106901/106901 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 91322 event pairs, 499 based on Foata normal form. 6/9409 useless extension candidates. Maximal degree in co-relation 54408. Up to 2947 conditions per place. [2022-07-21 09:13:01,647 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 296 selfloop transitions, 219 changer transitions 4/574 dead transitions. [2022-07-21 09:13:01,647 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 574 transitions, 11140 flow [2022-07-21 09:13:01,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:13:01,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:13:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 570 transitions. [2022-07-21 09:13:01,652 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8394698085419735 [2022-07-21 09:13:01,652 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 570 transitions. [2022-07-21 09:13:01,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 570 transitions. [2022-07-21 09:13:01,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:01,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 570 transitions. [2022-07-21 09:13:01,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:01,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:01,660 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:01,660 INFO L186 Difference]: Start difference. First operand has 185 places, 413 transitions, 7730 flow. Second operand 7 states and 570 transitions. [2022-07-21 09:13:01,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 574 transitions, 11140 flow [2022-07-21 09:13:01,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 574 transitions, 11033 flow, removed 47 selfloop flow, removed 1 redundant places. [2022-07-21 09:13:02,005 INFO L242 Difference]: Finished difference. Result has 196 places, 449 transitions, 9123 flow [2022-07-21 09:13:02,005 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=7637, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9123, PETRI_PLACES=196, PETRI_TRANSITIONS=449} [2022-07-21 09:13:02,006 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 110 predicate places. [2022-07-21 09:13:02,006 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 449 transitions, 9123 flow [2022-07-21 09:13:02,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:02,006 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:02,007 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:02,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-21 09:13:02,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 09:13:02,229 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:02,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:02,230 INFO L85 PathProgramCache]: Analyzing trace with hash 656605838, now seen corresponding path program 7 times [2022-07-21 09:13:02,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:02,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457368001] [2022-07-21 09:13:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:02,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:02,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:02,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457368001] [2022-07-21 09:13:02,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457368001] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:13:02,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:13:02,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:13:02,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515938978] [2022-07-21 09:13:02,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:02,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:13:02,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:02,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:13:02,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:13:02,336 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-21 09:13:02,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 449 transitions, 9123 flow. Second operand has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:02,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:02,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-21 09:13:02,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:04,190 INFO L129 PetriNetUnfolder]: 3464/8894 cut-off events. [2022-07-21 09:13:04,190 INFO L130 PetriNetUnfolder]: For 135480/136714 co-relation queries the response was YES. [2022-07-21 09:13:04,338 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55488 conditions, 8894 events. 3464/8894 cut-off events. For 135480/136714 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 89611 event pairs, 465 based on Foata normal form. 311/8947 useless extension candidates. Maximal degree in co-relation 55427. Up to 1740 conditions per place. [2022-07-21 09:13:04,382 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 150 selfloop transitions, 370 changer transitions 3/609 dead transitions. [2022-07-21 09:13:04,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 609 transitions, 13216 flow [2022-07-21 09:13:04,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:13:04,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:13:04,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 502 transitions. [2022-07-21 09:13:04,384 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8625429553264605 [2022-07-21 09:13:04,384 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 502 transitions. [2022-07-21 09:13:04,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 502 transitions. [2022-07-21 09:13:04,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:04,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 502 transitions. [2022-07-21 09:13:04,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.66666666666667) internal successors, (502), 6 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:04,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:04,388 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:04,388 INFO L186 Difference]: Start difference. First operand has 196 places, 449 transitions, 9123 flow. Second operand 6 states and 502 transitions. [2022-07-21 09:13:04,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 609 transitions, 13216 flow [2022-07-21 09:13:04,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 609 transitions, 13148 flow, removed 34 selfloop flow, removed 0 redundant places. [2022-07-21 09:13:04,659 INFO L242 Difference]: Finished difference. Result has 205 places, 548 transitions, 12794 flow [2022-07-21 09:13:04,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=9059, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12794, PETRI_PLACES=205, PETRI_TRANSITIONS=548} [2022-07-21 09:13:04,660 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 119 predicate places. [2022-07-21 09:13:04,660 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 548 transitions, 12794 flow [2022-07-21 09:13:04,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:04,661 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:04,661 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:04,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 09:13:04,661 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:04,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:04,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1072745922, now seen corresponding path program 4 times [2022-07-21 09:13:04,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:04,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696331426] [2022-07-21 09:13:04,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:04,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:04,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:04,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696331426] [2022-07-21 09:13:04,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696331426] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:13:04,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:13:04,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:13:04,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523545901] [2022-07-21 09:13:04,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:04,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:13:04,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:04,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:13:04,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:13:04,727 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-21 09:13:04,727 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 548 transitions, 12794 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:04,728 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:04,728 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-21 09:13:04,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:06,690 INFO L129 PetriNetUnfolder]: 3909/9528 cut-off events. [2022-07-21 09:13:06,691 INFO L130 PetriNetUnfolder]: For 170244/170512 co-relation queries the response was YES. [2022-07-21 09:13:06,760 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63320 conditions, 9528 events. 3909/9528 cut-off events. For 170244/170512 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 93113 event pairs, 976 based on Foata normal form. 37/9292 useless extension candidates. Maximal degree in co-relation 63254. Up to 5688 conditions per place. [2022-07-21 09:13:06,818 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 436 selfloop transitions, 66 changer transitions 8/584 dead transitions. [2022-07-21 09:13:06,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 584 transitions, 14251 flow [2022-07-21 09:13:06,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:13:06,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:13:06,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 476 transitions. [2022-07-21 09:13:06,820 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8178694158075601 [2022-07-21 09:13:06,820 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 476 transitions. [2022-07-21 09:13:06,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 476 transitions. [2022-07-21 09:13:06,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:06,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 476 transitions. [2022-07-21 09:13:06,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:06,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:06,823 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:06,824 INFO L186 Difference]: Start difference. First operand has 205 places, 548 transitions, 12794 flow. Second operand 6 states and 476 transitions. [2022-07-21 09:13:06,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 584 transitions, 14251 flow [2022-07-21 09:13:07,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 584 transitions, 14215 flow, removed 18 selfloop flow, removed 0 redundant places. [2022-07-21 09:13:07,290 INFO L242 Difference]: Finished difference. Result has 212 places, 541 transitions, 12699 flow [2022-07-21 09:13:07,290 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=12418, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12699, PETRI_PLACES=212, PETRI_TRANSITIONS=541} [2022-07-21 09:13:07,291 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 126 predicate places. [2022-07-21 09:13:07,291 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 541 transitions, 12699 flow [2022-07-21 09:13:07,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:07,291 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:07,291 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:07,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 09:13:07,291 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:07,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:07,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1416644298, now seen corresponding path program 8 times [2022-07-21 09:13:07,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:07,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610313461] [2022-07-21 09:13:07,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:07,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:07,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:07,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610313461] [2022-07-21 09:13:07,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610313461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:07,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097515403] [2022-07-21 09:13:07,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:13:07,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:07,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:07,392 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:07,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:13:07,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:13:07,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:07,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 09:13:07,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:07,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:08,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097515403] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:08,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:08,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2022-07-21 09:13:08,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348204281] [2022-07-21 09:13:08,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:08,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 09:13:08,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:08,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 09:13:08,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:13:08,270 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-07-21 09:13:08,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 541 transitions, 12699 flow. Second operand has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:08,271 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:08,271 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-07-21 09:13:08,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:12,655 INFO L129 PetriNetUnfolder]: 7811/19000 cut-off events. [2022-07-21 09:13:12,656 INFO L130 PetriNetUnfolder]: For 303313/304046 co-relation queries the response was YES. [2022-07-21 09:13:12,893 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118832 conditions, 19000 events. 7811/19000 cut-off events. For 303313/304046 co-relation queries the response was YES. Maximal size of possible extension queue 1439. Compared 210815 event pairs, 1006 based on Foata normal form. 473/19077 useless extension candidates. Maximal degree in co-relation 118762. Up to 4772 conditions per place. [2022-07-21 09:13:12,983 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 783 selfloop transitions, 280 changer transitions 21/1170 dead transitions. [2022-07-21 09:13:12,983 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 1170 transitions, 28289 flow [2022-07-21 09:13:12,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 09:13:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-21 09:13:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1097 transitions. [2022-07-21 09:13:12,986 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7539518900343642 [2022-07-21 09:13:12,986 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1097 transitions. [2022-07-21 09:13:12,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1097 transitions. [2022-07-21 09:13:12,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:12,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1097 transitions. [2022-07-21 09:13:12,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 73.13333333333334) internal successors, (1097), 15 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:12,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:12,992 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:12,992 INFO L186 Difference]: Start difference. First operand has 212 places, 541 transitions, 12699 flow. Second operand 15 states and 1097 transitions. [2022-07-21 09:13:12,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 1170 transitions, 28289 flow [2022-07-21 09:13:13,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 1170 transitions, 28213 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-07-21 09:13:13,741 INFO L242 Difference]: Finished difference. Result has 236 places, 711 transitions, 17313 flow [2022-07-21 09:13:13,741 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=12577, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=17313, PETRI_PLACES=236, PETRI_TRANSITIONS=711} [2022-07-21 09:13:13,742 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 150 predicate places. [2022-07-21 09:13:13,742 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 711 transitions, 17313 flow [2022-07-21 09:13:13,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:13,743 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:13,743 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:13,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:13,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 09:13:13,944 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:13,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:13,945 INFO L85 PathProgramCache]: Analyzing trace with hash 846898254, now seen corresponding path program 9 times [2022-07-21 09:13:13,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:13,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740104560] [2022-07-21 09:13:13,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:13,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:14,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:14,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740104560] [2022-07-21 09:13:14,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740104560] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:13:14,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:13:14,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:13:14,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752471413] [2022-07-21 09:13:14,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:14,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:13:14,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:14,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:13:14,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:13:14,013 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-21 09:13:14,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 711 transitions, 17313 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:14,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:14,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-21 09:13:14,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:18,434 INFO L129 PetriNetUnfolder]: 7695/18660 cut-off events. [2022-07-21 09:13:18,435 INFO L130 PetriNetUnfolder]: For 363847/364686 co-relation queries the response was YES. [2022-07-21 09:13:18,557 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129115 conditions, 18660 events. 7695/18660 cut-off events. For 363847/364686 co-relation queries the response was YES. Maximal size of possible extension queue 1442. Compared 206916 event pairs, 2046 based on Foata normal form. 194/18371 useless extension candidates. Maximal degree in co-relation 129034. Up to 11820 conditions per place. [2022-07-21 09:13:18,647 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 566 selfloop transitions, 73 changer transitions 9/740 dead transitions. [2022-07-21 09:13:18,648 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 740 transitions, 18968 flow [2022-07-21 09:13:18,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:13:18,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:13:18,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 475 transitions. [2022-07-21 09:13:18,649 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8161512027491409 [2022-07-21 09:13:18,650 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 475 transitions. [2022-07-21 09:13:18,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 475 transitions. [2022-07-21 09:13:18,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:18,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 475 transitions. [2022-07-21 09:13:18,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.16666666666667) internal successors, (475), 6 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:18,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:18,653 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:18,653 INFO L186 Difference]: Start difference. First operand has 236 places, 711 transitions, 17313 flow. Second operand 6 states and 475 transitions. [2022-07-21 09:13:18,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 740 transitions, 18968 flow [2022-07-21 09:13:19,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 740 transitions, 18783 flow, removed 58 selfloop flow, removed 4 redundant places. [2022-07-21 09:13:19,681 INFO L242 Difference]: Finished difference. Result has 237 places, 715 transitions, 17401 flow [2022-07-21 09:13:19,682 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=17100, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=17401, PETRI_PLACES=237, PETRI_TRANSITIONS=715} [2022-07-21 09:13:19,682 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 151 predicate places. [2022-07-21 09:13:19,682 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 715 transitions, 17401 flow [2022-07-21 09:13:19,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:19,683 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:19,683 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:19,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 09:13:19,683 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:19,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:19,683 INFO L85 PathProgramCache]: Analyzing trace with hash 570332790, now seen corresponding path program 10 times [2022-07-21 09:13:19,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:19,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73311534] [2022-07-21 09:13:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:19,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:19,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:19,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73311534] [2022-07-21 09:13:19,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73311534] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:13:19,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:13:19,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:13:19,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620470457] [2022-07-21 09:13:19,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:19,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:13:19,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:19,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:13:19,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:13:19,875 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-21 09:13:19,876 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 715 transitions, 17401 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:19,876 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:19,876 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-21 09:13:19,876 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:24,250 INFO L129 PetriNetUnfolder]: 7839/18997 cut-off events. [2022-07-21 09:13:24,250 INFO L130 PetriNetUnfolder]: For 377260/378069 co-relation queries the response was YES. [2022-07-21 09:13:24,393 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132423 conditions, 18997 events. 7839/18997 cut-off events. For 377260/378069 co-relation queries the response was YES. Maximal size of possible extension queue 1467. Compared 211246 event pairs, 2077 based on Foata normal form. 194/18715 useless extension candidates. Maximal degree in co-relation 132341. Up to 11793 conditions per place. [2022-07-21 09:13:24,673 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 627 selfloop transitions, 87 changer transitions 15/819 dead transitions. [2022-07-21 09:13:24,674 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 819 transitions, 21055 flow [2022-07-21 09:13:24,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:13:24,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:13:24,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2022-07-21 09:13:24,675 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-07-21 09:13:24,675 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2022-07-21 09:13:24,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2022-07-21 09:13:24,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:24,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2022-07-21 09:13:24,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:24,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:24,678 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:24,678 INFO L186 Difference]: Start difference. First operand has 237 places, 715 transitions, 17401 flow. Second operand 6 states and 486 transitions. [2022-07-21 09:13:24,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 819 transitions, 21055 flow [2022-07-21 09:13:25,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 819 transitions, 20722 flow, removed 37 selfloop flow, removed 7 redundant places. [2022-07-21 09:13:25,865 INFO L242 Difference]: Finished difference. Result has 236 places, 713 transitions, 17288 flow [2022-07-21 09:13:25,865 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=16673, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=17288, PETRI_PLACES=236, PETRI_TRANSITIONS=713} [2022-07-21 09:13:25,865 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 150 predicate places. [2022-07-21 09:13:25,866 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 713 transitions, 17288 flow [2022-07-21 09:13:25,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:25,866 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:25,866 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:25,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 09:13:25,866 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:25,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:25,867 INFO L85 PathProgramCache]: Analyzing trace with hash -742089420, now seen corresponding path program 1 times [2022-07-21 09:13:25,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:25,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615323726] [2022-07-21 09:13:25,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:25,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:26,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:26,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615323726] [2022-07-21 09:13:26,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615323726] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:26,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321485683] [2022-07-21 09:13:26,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:26,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:26,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:26,068 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:26,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:13:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:26,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 09:13:26,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:26,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:31,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321485683] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:31,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:31,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-07-21 09:13:31,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703299254] [2022-07-21 09:13:31,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:31,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 09:13:31,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:31,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 09:13:31,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=244, Unknown=1, NotChecked=0, Total=306 [2022-07-21 09:13:31,448 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-07-21 09:13:31,453 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 713 transitions, 17288 flow. Second operand has 18 states, 18 states have (on average 67.11111111111111) internal successors, (1208), 18 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:31,453 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:31,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-07-21 09:13:31,454 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:36,259 INFO L129 PetriNetUnfolder]: 7817/20820 cut-off events. [2022-07-21 09:13:36,260 INFO L130 PetriNetUnfolder]: For 399604/400727 co-relation queries the response was YES. [2022-07-21 09:13:36,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143283 conditions, 20820 events. 7817/20820 cut-off events. For 399604/400727 co-relation queries the response was YES. Maximal size of possible extension queue 1672. Compared 245470 event pairs, 539 based on Foata normal form. 373/20764 useless extension candidates. Maximal degree in co-relation 143202. Up to 8773 conditions per place. [2022-07-21 09:13:36,738 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 670 selfloop transitions, 347 changer transitions 9/1133 dead transitions. [2022-07-21 09:13:36,738 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 1133 transitions, 28929 flow [2022-07-21 09:13:36,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:13:36,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 09:13:36,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 855 transitions. [2022-07-21 09:13:36,739 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7345360824742269 [2022-07-21 09:13:36,739 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 855 transitions. [2022-07-21 09:13:36,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 855 transitions. [2022-07-21 09:13:36,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:36,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 855 transitions. [2022-07-21 09:13:36,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 71.25) internal successors, (855), 12 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:36,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:36,743 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:36,744 INFO L186 Difference]: Start difference. First operand has 236 places, 713 transitions, 17288 flow. Second operand 12 states and 855 transitions. [2022-07-21 09:13:36,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 1133 transitions, 28929 flow [2022-07-21 09:13:37,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 1133 transitions, 28505 flow, removed 19 selfloop flow, removed 13 redundant places. [2022-07-21 09:13:37,974 INFO L242 Difference]: Finished difference. Result has 237 places, 922 transitions, 22501 flow [2022-07-21 09:13:37,975 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=16872, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=22501, PETRI_PLACES=237, PETRI_TRANSITIONS=922} [2022-07-21 09:13:37,975 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 151 predicate places. [2022-07-21 09:13:37,975 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 922 transitions, 22501 flow [2022-07-21 09:13:37,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 67.11111111111111) internal successors, (1208), 18 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:37,975 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:37,976 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:37,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:38,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:38,176 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:38,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:38,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1271945040, now seen corresponding path program 2 times [2022-07-21 09:13:38,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:38,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654627919] [2022-07-21 09:13:38,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:38,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:38,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:38,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654627919] [2022-07-21 09:13:38,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654627919] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:38,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467637473] [2022-07-21 09:13:38,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:13:38,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:38,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:38,358 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:38,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:13:38,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:13:38,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:38,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 09:13:38,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:38,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:46,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467637473] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:46,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:46,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-07-21 09:13:46,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989242841] [2022-07-21 09:13:46,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:46,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 09:13:46,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:46,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 09:13:46,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=231, Unknown=3, NotChecked=0, Total=306 [2022-07-21 09:13:46,874 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2022-07-21 09:13:46,875 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 922 transitions, 22501 flow. Second operand has 18 states, 18 states have (on average 65.55555555555556) internal successors, (1180), 18 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:46,875 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:46,875 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2022-07-21 09:13:46,875 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:53,274 INFO L129 PetriNetUnfolder]: 9603/24643 cut-off events. [2022-07-21 09:13:53,274 INFO L130 PetriNetUnfolder]: For 497725/498201 co-relation queries the response was YES. [2022-07-21 09:13:53,518 INFO L84 FinitePrefix]: Finished finitePrefix Result has 177330 conditions, 24643 events. 9603/24643 cut-off events. For 497725/498201 co-relation queries the response was YES. Maximal size of possible extension queue 1995. Compared 293341 event pairs, 1542 based on Foata normal form. 54/24147 useless extension candidates. Maximal degree in co-relation 177251. Up to 12861 conditions per place. [2022-07-21 09:13:53,650 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 624 selfloop transitions, 428 changer transitions 7/1131 dead transitions. [2022-07-21 09:13:53,651 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 1131 transitions, 28693 flow [2022-07-21 09:13:53,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:13:53,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 09:13:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 836 transitions. [2022-07-21 09:13:53,653 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.718213058419244 [2022-07-21 09:13:53,653 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 836 transitions. [2022-07-21 09:13:53,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 836 transitions. [2022-07-21 09:13:53,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:53,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 836 transitions. [2022-07-21 09:13:53,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 69.66666666666667) internal successors, (836), 12 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:53,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:53,657 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:53,657 INFO L186 Difference]: Start difference. First operand has 237 places, 922 transitions, 22501 flow. Second operand 12 states and 836 transitions. [2022-07-21 09:13:53,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 1131 transitions, 28693 flow [2022-07-21 09:13:55,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 1131 transitions, 28276 flow, removed 168 selfloop flow, removed 5 redundant places. [2022-07-21 09:13:55,511 INFO L242 Difference]: Finished difference. Result has 244 places, 984 transitions, 24543 flow [2022-07-21 09:13:55,512 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=22086, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=922, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=24543, PETRI_PLACES=244, PETRI_TRANSITIONS=984} [2022-07-21 09:13:55,512 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 158 predicate places. [2022-07-21 09:13:55,513 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 984 transitions, 24543 flow [2022-07-21 09:13:55,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.55555555555556) internal successors, (1180), 18 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:55,513 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:55,513 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:55,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:55,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-21 09:13:55,720 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:55,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:55,720 INFO L85 PathProgramCache]: Analyzing trace with hash 814758276, now seen corresponding path program 3 times [2022-07-21 09:13:55,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:55,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614267694] [2022-07-21 09:13:55,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:55,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:55,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:55,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614267694] [2022-07-21 09:13:55,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614267694] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:55,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280626700] [2022-07-21 09:13:55,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:13:55,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:55,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:55,870 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:55,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:13:55,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:13:55,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:55,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 09:13:55,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:56,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:56,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280626700] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:56,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:56,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-07-21 09:13:56,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126684740] [2022-07-21 09:13:56,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:56,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 09:13:56,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:56,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 09:13:56,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-07-21 09:13:56,853 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2022-07-21 09:13:56,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 984 transitions, 24543 flow. Second operand has 17 states, 17 states have (on average 65.70588235294117) internal successors, (1117), 17 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:56,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:56,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2022-07-21 09:13:56,854 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:04,470 INFO L129 PetriNetUnfolder]: 10923/27655 cut-off events. [2022-07-21 09:14:04,470 INFO L130 PetriNetUnfolder]: For 602363/602909 co-relation queries the response was YES. [2022-07-21 09:14:04,762 INFO L84 FinitePrefix]: Finished finitePrefix Result has 207186 conditions, 27655 events. 10923/27655 cut-off events. For 602363/602909 co-relation queries the response was YES. Maximal size of possible extension queue 2322. Compared 332127 event pairs, 1739 based on Foata normal form. 57/27095 useless extension candidates. Maximal degree in co-relation 207105. Up to 15754 conditions per place. [2022-07-21 09:14:04,919 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 833 selfloop transitions, 409 changer transitions 4/1318 dead transitions. [2022-07-21 09:14:04,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 1318 transitions, 35350 flow [2022-07-21 09:14:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:14:04,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 09:14:04,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 829 transitions. [2022-07-21 09:14:04,921 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7121993127147767 [2022-07-21 09:14:04,921 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 829 transitions. [2022-07-21 09:14:04,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 829 transitions. [2022-07-21 09:14:04,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:04,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 829 transitions. [2022-07-21 09:14:04,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 69.08333333333333) internal successors, (829), 12 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:04,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:04,924 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:04,924 INFO L186 Difference]: Start difference. First operand has 244 places, 984 transitions, 24543 flow. Second operand 12 states and 829 transitions. [2022-07-21 09:14:04,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 1318 transitions, 35350 flow [2022-07-21 09:14:07,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 1318 transitions, 34088 flow, removed 71 selfloop flow, removed 14 redundant places. [2022-07-21 09:14:07,619 INFO L242 Difference]: Finished difference. Result has 241 places, 1152 transitions, 29390 flow [2022-07-21 09:14:07,620 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=23495, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=29390, PETRI_PLACES=241, PETRI_TRANSITIONS=1152} [2022-07-21 09:14:07,621 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 155 predicate places. [2022-07-21 09:14:07,621 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 1152 transitions, 29390 flow [2022-07-21 09:14:07,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.70588235294117) internal successors, (1117), 17 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:07,621 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:07,622 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:14:07,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:07,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:07,845 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:14:07,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:07,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1637704500, now seen corresponding path program 1 times [2022-07-21 09:14:07,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:07,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506378958] [2022-07-21 09:14:07,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:07,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:07,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:07,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506378958] [2022-07-21 09:14:07,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506378958] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:07,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455051838] [2022-07-21 09:14:07,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:07,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:07,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:07,964 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:14:07,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:14:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:08,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 09:14:08,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:08,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:08,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455051838] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:08,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:08,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 11] total 17 [2022-07-21 09:14:08,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390823635] [2022-07-21 09:14:08,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:08,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 09:14:08,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:08,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 09:14:08,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-07-21 09:14:08,553 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-07-21 09:14:08,554 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 1152 transitions, 29390 flow. Second operand has 17 states, 17 states have (on average 71.23529411764706) internal successors, (1211), 17 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:08,554 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:08,554 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-07-21 09:14:08,554 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand