./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/mult-dist.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/mult-dist.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 c22a326532494b0b5126a81d8882f3e958ed0a5a46e6da0f77df1a4da18ba846 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:00:50,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:00:50,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:00:50,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:00:50,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:00:50,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:00:50,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:00:50,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:00:50,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:00:50,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:00:50,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:00:50,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:00:50,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:00:50,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:00:50,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:00:50,659 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:00:50,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:00:50,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:00:50,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:00:50,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:00:50,669 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:00:50,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:00:50,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:00:50,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:00:50,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:00:50,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:00:50,681 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:00:50,681 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:00:50,682 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:00:50,682 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:00:50,683 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:00:50,683 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:00:50,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:00:50,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:00:50,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:00:50,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:00:50,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:00:50,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:00:50,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:00:50,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:00:50,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:00:50,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:00:50,697 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:00:50,722 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:00:50,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:00:50,723 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:00:50,723 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:00:50,724 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:00:50,724 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:00:50,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:00:50,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:00:50,725 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:00:50,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:00:50,726 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:00:50,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:00:50,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:00:50,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:00:50,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:00:50,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:00:50,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:00:50,728 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:00:50,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:00:50,728 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:00:50,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:00:50,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:00:50,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:00:50,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:00:50,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:00:50,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:00:50,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:00:50,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:00:50,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:00:50,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:00:50,730 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:00:50,731 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:00:50,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:00:50,731 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c22a326532494b0b5126a81d8882f3e958ed0a5a46e6da0f77df1a4da18ba846 [2022-07-21 09:00:51,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:00:51,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:00:51,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:00:51,041 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:00:51,042 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:00:51,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/mult-dist.wvr.c [2022-07-21 09:00:51,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47cc76b68/cac2ea24b8924463b133c5890fd0676c/FLAGf02803614 [2022-07-21 09:00:51,541 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:00:51,541 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-dist.wvr.c [2022-07-21 09:00:51,550 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47cc76b68/cac2ea24b8924463b133c5890fd0676c/FLAGf02803614 [2022-07-21 09:00:51,964 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47cc76b68/cac2ea24b8924463b133c5890fd0676c [2022-07-21 09:00:51,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:00:51,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:00:51,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:00:51,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:00:51,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:00:51,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:00:51" (1/1) ... [2022-07-21 09:00:51,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cc35bd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:51, skipping insertion in model container [2022-07-21 09:00:51,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:00:51" (1/1) ... [2022-07-21 09:00:51,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:00:51,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:00:52,192 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/mult-dist.wvr.c[2116,2129] [2022-07-21 09:00:52,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:00:52,253 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:00:52,284 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/mult-dist.wvr.c[2116,2129] [2022-07-21 09:00:52,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:00:52,301 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:00:52,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:52 WrapperNode [2022-07-21 09:00:52,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:00:52,308 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:00:52,308 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:00:52,308 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:00:52,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:52" (1/1) ... [2022-07-21 09:00:52,327 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:52" (1/1) ... [2022-07-21 09:00:52,350 INFO L137 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-07-21 09:00:52,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:00:52,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:00:52,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:00:52,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:00:52,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:52" (1/1) ... [2022-07-21 09:00:52,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:52" (1/1) ... [2022-07-21 09:00:52,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:52" (1/1) ... [2022-07-21 09:00:52,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:52" (1/1) ... [2022-07-21 09:00:52,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:52" (1/1) ... [2022-07-21 09:00:52,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:52" (1/1) ... [2022-07-21 09:00:52,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:52" (1/1) ... [2022-07-21 09:00:52,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:00:52,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:00:52,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:00:52,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:00:52,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:52" (1/1) ... [2022-07-21 09:00:52,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:00:52,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:00:52,413 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 09:00:52,436 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 09:00:52,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:00:52,453 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:00:52,453 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:00:52,453 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:00:52,454 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:00:52,454 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-21 09:00:52,454 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-21 09:00:52,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:00:52,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:00:52,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:00:52,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:00:52,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:00:52,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:00:52,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:00:52,456 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 09:00:52,551 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:00:52,553 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:00:52,762 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:00:52,769 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:00:52,772 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 09:00:52,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:00:52 BoogieIcfgContainer [2022-07-21 09:00:52,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:00:52,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:00:52,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:00:52,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:00:52,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:00:51" (1/3) ... [2022-07-21 09:00:52,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@682ffc67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:00:52, skipping insertion in model container [2022-07-21 09:00:52,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:52" (2/3) ... [2022-07-21 09:00:52,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@682ffc67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:00:52, skipping insertion in model container [2022-07-21 09:00:52,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:00:52" (3/3) ... [2022-07-21 09:00:52,784 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2022-07-21 09:00:52,789 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:00:52,796 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:00:52,796 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:00:52,797 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:00:52,865 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 09:00:52,890 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 110 places, 107 transitions, 238 flow [2022-07-21 09:00:52,956 INFO L129 PetriNetUnfolder]: 7/104 cut-off events. [2022-07-21 09:00:52,956 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 09:00:52,960 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 104 events. 7/104 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 72 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2022-07-21 09:00:52,960 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 107 transitions, 238 flow [2022-07-21 09:00:52,968 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 93 transitions, 204 flow [2022-07-21 09:00:52,982 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:00:52,994 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@2f67e9a4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@176c4a92 [2022-07-21 09:00:52,995 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 09:00:53,036 INFO L129 PetriNetUnfolder]: 7/92 cut-off events. [2022-07-21 09:00:53,036 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 09:00:53,036 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:53,037 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 09:00:53,038 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 09:00:53,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:53,044 INFO L85 PathProgramCache]: Analyzing trace with hash 10639135, now seen corresponding path program 1 times [2022-07-21 09:00:53,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:53,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693996124] [2022-07-21 09:00:53,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:53,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:53,289 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 09:00:53,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:53,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693996124] [2022-07-21 09:00:53,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693996124] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:53,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:53,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:00:53,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985967195] [2022-07-21 09:00:53,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:53,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:00:53,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:53,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:00:53,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:00:53,335 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 107 [2022-07-21 09:00:53,340 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 93 transitions, 204 flow. Second operand has 2 states, 2 states have (on average 99.5) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 09:00:53,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:53,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 107 [2022-07-21 09:00:53,341 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:53,400 INFO L129 PetriNetUnfolder]: 3/89 cut-off events. [2022-07-21 09:00:53,400 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-21 09:00:53,402 INFO L84 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 89 events. 3/89 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 10/95 useless extension candidates. Maximal degree in co-relation 66. Up to 7 conditions per place. [2022-07-21 09:00:53,403 INFO L132 encePairwiseOnDemand]: 103/107 looper letters, 6 selfloop transitions, 0 changer transitions 1/89 dead transitions. [2022-07-21 09:00:53,403 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 89 transitions, 208 flow [2022-07-21 09:00:53,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:00:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:00:53,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 202 transitions. [2022-07-21 09:00:53,417 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9439252336448598 [2022-07-21 09:00:53,418 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 202 transitions. [2022-07-21 09:00:53,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 202 transitions. [2022-07-21 09:00:53,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:53,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 202 transitions. [2022-07-21 09:00:53,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 101.0) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 09:00:53,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states 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 09:00:53,433 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states 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 09:00:53,435 INFO L186 Difference]: Start difference. First operand has 96 places, 93 transitions, 204 flow. Second operand 2 states and 202 transitions. [2022-07-21 09:00:53,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 89 transitions, 208 flow [2022-07-21 09:00:53,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 89 transitions, 196 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-21 09:00:53,443 INFO L242 Difference]: Finished difference. Result has 91 places, 88 transitions, 182 flow [2022-07-21 09:00:53,445 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=91, PETRI_TRANSITIONS=88} [2022-07-21 09:00:53,449 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, -5 predicate places. [2022-07-21 09:00:53,449 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 88 transitions, 182 flow [2022-07-21 09:00:53,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 99.5) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 09:00:53,450 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:53,451 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 09:00:53,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:00:53,452 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 09:00:53,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:53,453 INFO L85 PathProgramCache]: Analyzing trace with hash -489038424, now seen corresponding path program 1 times [2022-07-21 09:00:53,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:53,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649359948] [2022-07-21 09:00:53,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:53,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:53,760 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 09:00:53,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:53,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649359948] [2022-07-21 09:00:53,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649359948] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:53,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:53,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:00:53,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711944380] [2022-07-21 09:00:53,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:53,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:00:53,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:53,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:00:53,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:00:53,766 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 107 [2022-07-21 09:00:53,767 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 88 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 86.85714285714286) internal successors, (608), 7 states have internal predecessors, (608), 0 states have call successors, (0), 0 states 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 09:00:53,767 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:53,767 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 107 [2022-07-21 09:00:53,767 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:53,926 INFO L129 PetriNetUnfolder]: 53/322 cut-off events. [2022-07-21 09:00:53,926 INFO L130 PetriNetUnfolder]: For 22/23 co-relation queries the response was YES. [2022-07-21 09:00:53,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 322 events. 53/322 cut-off events. For 22/23 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1277 event pairs, 7 based on Foata normal form. 2/290 useless extension candidates. Maximal degree in co-relation 432. Up to 52 conditions per place. [2022-07-21 09:00:53,932 INFO L132 encePairwiseOnDemand]: 98/107 looper letters, 35 selfloop transitions, 9 changer transitions 4/120 dead transitions. [2022-07-21 09:00:53,932 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 120 transitions, 354 flow [2022-07-21 09:00:53,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:00:53,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:00:53,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 644 transitions. [2022-07-21 09:00:53,938 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8598130841121495 [2022-07-21 09:00:53,938 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 644 transitions. [2022-07-21 09:00:53,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 644 transitions. [2022-07-21 09:00:53,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:53,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 644 transitions. [2022-07-21 09:00:53,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.0) internal successors, (644), 7 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:53,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 107.0) internal successors, (856), 8 states have internal predecessors, (856), 0 states have call successors, (0), 0 states 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 09:00:53,945 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 107.0) internal successors, (856), 8 states have internal predecessors, (856), 0 states have call successors, (0), 0 states 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 09:00:53,945 INFO L186 Difference]: Start difference. First operand has 91 places, 88 transitions, 182 flow. Second operand 7 states and 644 transitions. [2022-07-21 09:00:53,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 120 transitions, 354 flow [2022-07-21 09:00:53,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 120 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:00:53,950 INFO L242 Difference]: Finished difference. Result has 100 places, 94 transitions, 235 flow [2022-07-21 09:00:53,950 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=235, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2022-07-21 09:00:53,951 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 4 predicate places. [2022-07-21 09:00:53,951 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 235 flow [2022-07-21 09:00:53,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.85714285714286) internal successors, (608), 7 states have internal predecessors, (608), 0 states have call successors, (0), 0 states 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 09:00:53,952 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:53,952 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:00:53,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:00:53,953 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 09:00:53,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:53,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1351944439, now seen corresponding path program 1 times [2022-07-21 09:00:53,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:53,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218255040] [2022-07-21 09:00:53,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:53,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:54,328 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 09:00:54,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:54,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218255040] [2022-07-21 09:00:54,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218255040] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:00:54,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298043454] [2022-07-21 09:00:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:54,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:00:54,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:00:54,333 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 09:00:54,358 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 09:00:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:54,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 09:00:54,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:00:55,426 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 09:00:55,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:00:56,858 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 09:00:56,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298043454] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:00:56,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:00:56,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 13 [2022-07-21 09:00:56,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32642538] [2022-07-21 09:00:56,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:56,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:00:56,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:56,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:00:56,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-07-21 09:00:56,865 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 107 [2022-07-21 09:00:56,865 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 94 transitions, 235 flow. Second operand has 7 states, 7 states have (on average 79.71428571428571) internal successors, (558), 7 states have internal predecessors, (558), 0 states have call successors, (0), 0 states 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 09:00:56,866 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:56,867 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 107 [2022-07-21 09:00:56,867 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:57,442 INFO L129 PetriNetUnfolder]: 1986/4368 cut-off events. [2022-07-21 09:00:57,442 INFO L130 PetriNetUnfolder]: For 385/387 co-relation queries the response was YES. [2022-07-21 09:00:57,454 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7855 conditions, 4368 events. 1986/4368 cut-off events. For 385/387 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 35893 event pairs, 405 based on Foata normal form. 1/3597 useless extension candidates. Maximal degree in co-relation 7847. Up to 1351 conditions per place. [2022-07-21 09:00:57,473 INFO L132 encePairwiseOnDemand]: 93/107 looper letters, 80 selfloop transitions, 44 changer transitions 0/193 dead transitions. [2022-07-21 09:00:57,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 193 transitions, 697 flow [2022-07-21 09:00:57,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:00:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:00:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 895 transitions. [2022-07-21 09:00:57,477 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8364485981308412 [2022-07-21 09:00:57,477 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 895 transitions. [2022-07-21 09:00:57,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 895 transitions. [2022-07-21 09:00:57,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:57,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 895 transitions. [2022-07-21 09:00:57,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 89.5) internal successors, (895), 10 states have internal predecessors, (895), 0 states have call successors, (0), 0 states 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 09:00:57,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 107.0) internal successors, (1177), 11 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states 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 09:00:57,482 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 107.0) internal successors, (1177), 11 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states 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 09:00:57,483 INFO L186 Difference]: Start difference. First operand has 100 places, 94 transitions, 235 flow. Second operand 10 states and 895 transitions. [2022-07-21 09:00:57,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 193 transitions, 697 flow [2022-07-21 09:00:57,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 193 transitions, 693 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-21 09:00:57,489 INFO L242 Difference]: Finished difference. Result has 111 places, 136 transitions, 511 flow [2022-07-21 09:00:57,489 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=511, PETRI_PLACES=111, PETRI_TRANSITIONS=136} [2022-07-21 09:00:57,490 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 15 predicate places. [2022-07-21 09:00:57,490 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 136 transitions, 511 flow [2022-07-21 09:00:57,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 79.71428571428571) internal successors, (558), 7 states have internal predecessors, (558), 0 states have call successors, (0), 0 states 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 09:00:57,491 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:57,491 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:00:57,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:00:57,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:00:57,715 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 09:00:57,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:57,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1429961801, now seen corresponding path program 2 times [2022-07-21 09:00:57,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:57,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544325885] [2022-07-21 09:00:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:57,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:57,871 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 09:00:57,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:57,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544325885] [2022-07-21 09:00:57,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544325885] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:00:57,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204119485] [2022-07-21 09:00:57,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:00:57,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:00:57,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:00:57,875 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 09:00:57,901 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 09:00:57,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:00:57,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:00:57,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 09:00:57,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:00:58,415 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 09:00:58,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:01:01,543 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 09:01:01,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204119485] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:01:01,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:01:01,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 12 [2022-07-21 09:01:01,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382013103] [2022-07-21 09:01:01,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:01:01,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:01:01,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:01:01,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:01:01,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-21 09:01:01,547 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 107 [2022-07-21 09:01:01,548 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 136 transitions, 511 flow. Second operand has 6 states, 6 states have (on average 82.66666666666667) internal successors, (496), 6 states have internal predecessors, (496), 0 states have call successors, (0), 0 states 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 09:01:01,548 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:01:01,548 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 107 [2022-07-21 09:01:01,548 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:01:02,475 INFO L129 PetriNetUnfolder]: 2061/4718 cut-off events. [2022-07-21 09:01:02,476 INFO L130 PetriNetUnfolder]: For 4342/4571 co-relation queries the response was YES. [2022-07-21 09:01:02,495 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12376 conditions, 4718 events. 2061/4718 cut-off events. For 4342/4571 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 41500 event pairs, 217 based on Foata normal form. 44/4469 useless extension candidates. Maximal degree in co-relation 12364. Up to 816 conditions per place. [2022-07-21 09:01:02,525 INFO L132 encePairwiseOnDemand]: 99/107 looper letters, 248 selfloop transitions, 56 changer transitions 0/376 dead transitions. [2022-07-21 09:01:02,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 376 transitions, 2393 flow [2022-07-21 09:01:02,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:01:02,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:01:02,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 917 transitions. [2022-07-21 09:01:02,528 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8570093457943925 [2022-07-21 09:01:02,529 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 917 transitions. [2022-07-21 09:01:02,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 917 transitions. [2022-07-21 09:01:02,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:01:02,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 917 transitions. [2022-07-21 09:01:02,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 91.7) internal successors, (917), 10 states have internal predecessors, (917), 0 states have call successors, (0), 0 states 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 09:01:02,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 107.0) internal successors, (1177), 11 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states 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 09:01:02,534 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 107.0) internal successors, (1177), 11 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states 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 09:01:02,534 INFO L186 Difference]: Start difference. First operand has 111 places, 136 transitions, 511 flow. Second operand 10 states and 917 transitions. [2022-07-21 09:01:02,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 376 transitions, 2393 flow [2022-07-21 09:01:02,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 376 transitions, 2393 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:01:02,560 INFO L242 Difference]: Finished difference. Result has 129 places, 185 transitions, 1030 flow [2022-07-21 09:01:02,561 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1030, PETRI_PLACES=129, PETRI_TRANSITIONS=185} [2022-07-21 09:01:02,562 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 33 predicate places. [2022-07-21 09:01:02,562 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 185 transitions, 1030 flow [2022-07-21 09:01:02,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.66666666666667) internal successors, (496), 6 states have internal predecessors, (496), 0 states have call successors, (0), 0 states 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 09:01:02,562 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:01:02,563 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:01:02,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:01:02,788 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,SelfDestructingSolverStorable3 [2022-07-21 09:01:02,788 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 09:01:02,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:01:02,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1619176265, now seen corresponding path program 3 times [2022-07-21 09:01:02,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:01:02,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629469837] [2022-07-21 09:01:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:01:02,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:01:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:01:02,985 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 09:01:02,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:01:02,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629469837] [2022-07-21 09:01:02,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629469837] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:01:02,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966365241] [2022-07-21 09:01:02,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:01:02,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:01:02,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:01:02,988 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 09:01:02,991 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 09:01:03,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:01:03,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:01:03,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 09:01:03,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:01:03,249 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 09:01:03,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:01:03,339 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 09:01:03,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966365241] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:01:03,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:01:03,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-07-21 09:01:03,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148280246] [2022-07-21 09:01:03,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:01:03,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:01:03,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:01:03,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:01:03,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:01:03,342 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 107 [2022-07-21 09:01:03,344 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 185 transitions, 1030 flow. Second operand has 14 states, 14 states have (on average 79.42857142857143) internal successors, (1112), 14 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states 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 09:01:03,344 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:01:03,344 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 107 [2022-07-21 09:01:03,344 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:01:04,750 INFO L129 PetriNetUnfolder]: 3604/8239 cut-off events. [2022-07-21 09:01:04,751 INFO L130 PetriNetUnfolder]: For 19069/19618 co-relation queries the response was YES. [2022-07-21 09:01:04,791 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26011 conditions, 8239 events. 3604/8239 cut-off events. For 19069/19618 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 77255 event pairs, 556 based on Foata normal form. 91/8211 useless extension candidates. Maximal degree in co-relation 25990. Up to 1310 conditions per place. [2022-07-21 09:01:04,846 INFO L132 encePairwiseOnDemand]: 94/107 looper letters, 260 selfloop transitions, 144 changer transitions 6/479 dead transitions. [2022-07-21 09:01:04,847 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 479 transitions, 3728 flow [2022-07-21 09:01:04,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:01:04,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 09:01:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1399 transitions. [2022-07-21 09:01:04,851 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8171728971962616 [2022-07-21 09:01:04,851 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1399 transitions. [2022-07-21 09:01:04,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1399 transitions. [2022-07-21 09:01:04,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:01:04,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1399 transitions. [2022-07-21 09:01:04,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 87.4375) internal successors, (1399), 16 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states 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 09:01:04,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 107.0) internal successors, (1819), 17 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states 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 09:01:04,859 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 107.0) internal successors, (1819), 17 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states 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 09:01:04,860 INFO L186 Difference]: Start difference. First operand has 129 places, 185 transitions, 1030 flow. Second operand 16 states and 1399 transitions. [2022-07-21 09:01:04,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 479 transitions, 3728 flow [2022-07-21 09:01:04,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 479 transitions, 3712 flow, removed 8 selfloop flow, removed 0 redundant places. [2022-07-21 09:01:04,934 INFO L242 Difference]: Finished difference. Result has 155 places, 280 transitions, 2389 flow [2022-07-21 09:01:04,934 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2389, PETRI_PLACES=155, PETRI_TRANSITIONS=280} [2022-07-21 09:01:04,937 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 59 predicate places. [2022-07-21 09:01:04,937 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 280 transitions, 2389 flow [2022-07-21 09:01:04,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 79.42857142857143) internal successors, (1112), 14 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states 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 09:01:04,938 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:01:04,938 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:01:04,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 09:01:05,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:01:05,156 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 09:01:05,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:01:05,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1111005849, now seen corresponding path program 4 times [2022-07-21 09:01:05,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:01:05,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850834874] [2022-07-21 09:01:05,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:01:05,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:01:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:01:05,367 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 09:01:05,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:01:05,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850834874] [2022-07-21 09:01:05,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850834874] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:01:05,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244717297] [2022-07-21 09:01:05,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:01:05,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:01:05,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:01:05,370 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 09:01:05,372 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 09:01:05,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:01:05,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:01:05,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 09:01:05,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:01:05,746 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 09:01:05,747 INFO L328 TraceCheckSpWp]: Computing backward predicates...