./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 839c364b 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 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:49:15,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:49:15,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:49:15,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:49:15,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:49:15,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:49:15,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:49:15,626 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:49:15,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:49:15,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:49:15,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:49:15,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:49:15,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:49:15,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:49:15,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:49:15,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:49:15,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:49:15,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:49:15,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:49:15,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:49:15,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:49:15,650 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:49:15,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:49:15,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:49:15,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:49:15,657 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:49:15,657 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:49:15,658 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:49:15,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:49:15,661 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:49:15,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:49:15,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:49:15,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:49:15,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:49:15,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:49:15,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:49:15,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:49:15,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:49:15,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:49:15,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:49:15,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:49:15,669 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:49:15,692 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:49:15,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:49:15,693 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:49:15,693 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:49:15,694 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:49:15,694 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:49:15,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:49:15,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:49:15,695 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:49:15,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:49:15,696 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:49:15,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:49:15,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:49:15,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:49:15,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:49:15,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:49:15,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:49:15,697 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:49:15,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:49:15,697 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:49:15,698 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:49:15,698 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:49:15,698 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:49:15,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:49:15,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:49:15,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:49:15,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:49:15,699 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:49:15,699 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:49:15,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:49:15,700 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:49:15,700 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:49:15,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:49:15,701 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:49:15,701 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c22a326532494b0b5126a81d8882f3e958ed0a5a46e6da0f77df1a4da18ba846 [2021-12-14 16:49:15,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:49:15,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:49:15,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:49:15,994 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:49:15,994 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:49:15,995 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/mult-dist.wvr.c [2021-12-14 16:49:16,040 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f463bc1a/4712716d607641908a4ad8259f93f3e5/FLAG2b2c49c39 [2021-12-14 16:49:16,397 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:49:16,398 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-dist.wvr.c [2021-12-14 16:49:16,404 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f463bc1a/4712716d607641908a4ad8259f93f3e5/FLAG2b2c49c39 [2021-12-14 16:49:16,414 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f463bc1a/4712716d607641908a4ad8259f93f3e5 [2021-12-14 16:49:16,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:49:16,417 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:49:16,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:49:16,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:49:16,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:49:16,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:49:16" (1/1) ... [2021-12-14 16:49:16,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14cbed0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:16, skipping insertion in model container [2021-12-14 16:49:16,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:49:16" (1/1) ... [2021-12-14 16:49:16,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:49:16,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:49:16,575 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] [2021-12-14 16:49:16,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:49:16,583 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:49:16,599 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] [2021-12-14 16:49:16,600 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:49:16,611 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:49:16,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:16 WrapperNode [2021-12-14 16:49:16,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:49:16,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:49:16,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:49:16,613 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:49:16,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:16" (1/1) ... [2021-12-14 16:49:16,626 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:16" (1/1) ... [2021-12-14 16:49:16,641 INFO L137 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2021-12-14 16:49:16,643 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:49:16,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:49:16,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:49:16,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:49:16,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:16" (1/1) ... [2021-12-14 16:49:16,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:16" (1/1) ... [2021-12-14 16:49:16,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:16" (1/1) ... [2021-12-14 16:49:16,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:16" (1/1) ... [2021-12-14 16:49:16,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:16" (1/1) ... [2021-12-14 16:49:16,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:16" (1/1) ... [2021-12-14 16:49:16,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:16" (1/1) ... [2021-12-14 16:49:16,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:49:16,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:49:16,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:49:16,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:49:16,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:16" (1/1) ... [2021-12-14 16:49:16,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:49:16,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:49:16,705 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) [2021-12-14 16:49:16,710 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 [2021-12-14 16:49:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:49:16,734 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-14 16:49:16,734 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-14 16:49:16,734 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-14 16:49:16,734 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-14 16:49:16,734 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-14 16:49:16,734 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-14 16:49:16,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:49:16,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 16:49:16,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 16:49:16,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:49:16,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:49:16,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 16:49:16,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 16:49:16,737 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-14 16:49:16,841 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:49:16,843 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:49:17,046 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:49:17,053 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:49:17,067 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-14 16:49:17,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:49:17 BoogieIcfgContainer [2021-12-14 16:49:17,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:49:17,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:49:17,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:49:17,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:49:17,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:49:16" (1/3) ... [2021-12-14 16:49:17,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f3d4ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:49:17, skipping insertion in model container [2021-12-14 16:49:17,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:49:16" (2/3) ... [2021-12-14 16:49:17,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f3d4ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:49:17, skipping insertion in model container [2021-12-14 16:49:17,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:49:17" (3/3) ... [2021-12-14 16:49:17,077 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2021-12-14 16:49:17,080 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-14 16:49:17,095 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:49:17,095 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 16:49:17,095 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-14 16:49:17,149 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,150 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,150 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,151 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,151 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,151 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,151 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,152 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,152 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,152 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,152 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,153 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,153 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,153 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,153 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,153 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,154 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,154 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,154 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,154 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,155 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,155 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,155 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,155 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,156 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,156 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,156 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,156 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,157 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,157 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,157 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,157 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,158 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,158 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,158 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,158 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,158 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,159 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,159 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,159 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,159 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,160 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,160 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,160 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,161 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,161 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,161 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,161 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,161 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,162 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,162 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,162 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,162 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,163 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,163 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,163 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,163 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,163 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,164 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,164 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,167 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,171 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,171 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,171 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,178 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,179 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,179 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,180 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,181 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,181 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,181 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,181 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:49:17,188 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-14 16:49:17,225 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:49:17,231 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 16:49:17,231 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-14 16:49:17,241 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 110 places, 107 transitions, 238 flow [2021-12-14 16:49:17,288 INFO L129 PetriNetUnfolder]: 7/104 cut-off events. [2021-12-14 16:49:17,288 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-14 16:49:17,292 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 71 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. [2021-12-14 16:49:17,294 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 107 transitions, 238 flow [2021-12-14 16:49:17,300 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 93 transitions, 204 flow [2021-12-14 16:49:17,325 INFO L129 PetriNetUnfolder]: 7/92 cut-off events. [2021-12-14 16:49:17,326 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-14 16:49:17,326 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:17,326 INFO L254 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] [2021-12-14 16:49:17,327 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:49:17,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:17,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1219307936, now seen corresponding path program 1 times [2021-12-14 16:49:17,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:17,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053819387] [2021-12-14 16:49:17,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:17,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:17,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:17,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053819387] [2021-12-14 16:49:17,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053819387] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:17,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:17,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:49:17,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458990562] [2021-12-14 16:49:17,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:17,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:49:17,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:17,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:49:17,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:49:17,928 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 107 [2021-12-14 16:49:17,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 93 transitions, 204 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) [2021-12-14 16:49:17,936 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:17,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 107 [2021-12-14 16:49:17,937 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:18,162 INFO L129 PetriNetUnfolder]: 52/310 cut-off events. [2021-12-14 16:49:18,163 INFO L130 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2021-12-14 16:49:18,167 INFO L84 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 310 events. 52/310 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1182 event pairs, 9 based on Foata normal form. 56/340 useless extension candidates. Maximal degree in co-relation 182. Up to 49 conditions per place. [2021-12-14 16:49:18,170 INFO L132 encePairwiseOnDemand]: 93/107 looper letters, 35 selfloop transitions, 9 changer transitions 8/124 dead transitions. [2021-12-14 16:49:18,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 124 transitions, 406 flow [2021-12-14 16:49:18,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:49:18,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:49:18,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 919 transitions. [2021-12-14 16:49:18,199 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8588785046728972 [2021-12-14 16:49:18,200 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 919 transitions. [2021-12-14 16:49:18,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 919 transitions. [2021-12-14 16:49:18,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:18,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 919 transitions. [2021-12-14 16:49:18,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 91.9) internal successors, (919), 10 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:18,221 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) [2021-12-14 16:49:18,222 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) [2021-12-14 16:49:18,223 INFO L186 Difference]: Start difference. First operand has 96 places, 93 transitions, 204 flow. Second operand 10 states and 919 transitions. [2021-12-14 16:49:18,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 124 transitions, 406 flow [2021-12-14 16:49:18,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 124 transitions, 370 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-14 16:49:18,233 INFO L242 Difference]: Finished difference. Result has 103 places, 94 transitions, 235 flow [2021-12-14 16:49:18,234 INFO L317 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=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=235, PETRI_PLACES=103, PETRI_TRANSITIONS=94} [2021-12-14 16:49:18,239 INFO L334 CegarLoopForPetriNet]: 96 programPoint places, 7 predicate places. [2021-12-14 16:49:18,239 INFO L470 AbstractCegarLoop]: Abstraction has has 103 places, 94 transitions, 235 flow [2021-12-14 16:49:18,240 INFO L471 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) [2021-12-14 16:49:18,240 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:18,241 INFO L254 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] [2021-12-14 16:49:18,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:49:18,241 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:49:18,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:18,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1230493039, now seen corresponding path program 1 times [2021-12-14 16:49:18,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:18,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346605411] [2021-12-14 16:49:18,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:18,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:18,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:18,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346605411] [2021-12-14 16:49:18,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346605411] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:49:18,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927602298] [2021-12-14 16:49:18,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:18,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:49:18,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:49:18,559 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) [2021-12-14 16:49:18,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:49:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:18,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 16:49:18,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:49:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:19,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:49:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:19,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927602298] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 16:49:19,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:49:19,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 10] total 19 [2021-12-14 16:49:19,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063610535] [2021-12-14 16:49:19,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:19,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:49:19,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:19,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:49:19,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:49:19,603 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 107 [2021-12-14 16:49:19,604 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 94 transitions, 235 flow. Second operand has 9 states, 9 states have (on average 78.22222222222223) internal successors, (704), 9 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:19,604 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:19,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 107 [2021-12-14 16:49:19,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:20,875 INFO L129 PetriNetUnfolder]: 1768/3789 cut-off events. [2021-12-14 16:49:20,876 INFO L130 PetriNetUnfolder]: For 257/258 co-relation queries the response was YES. [2021-12-14 16:49:20,886 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6962 conditions, 3789 events. 1768/3789 cut-off events. For 257/258 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 29057 event pairs, 260 based on Foata normal form. 0/3141 useless extension candidates. Maximal degree in co-relation 6927. Up to 371 conditions per place. [2021-12-14 16:49:20,905 INFO L132 encePairwiseOnDemand]: 95/107 looper letters, 142 selfloop transitions, 41 changer transitions 0/251 dead transitions. [2021-12-14 16:49:20,906 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 251 transitions, 948 flow [2021-12-14 16:49:20,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 16:49:20,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-14 16:49:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1400 transitions. [2021-12-14 16:49:20,910 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8177570093457944 [2021-12-14 16:49:20,910 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1400 transitions. [2021-12-14 16:49:20,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1400 transitions. [2021-12-14 16:49:20,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:20,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1400 transitions. [2021-12-14 16:49:20,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 87.5) internal successors, (1400), 16 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:20,918 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) [2021-12-14 16:49:20,919 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) [2021-12-14 16:49:20,920 INFO L186 Difference]: Start difference. First operand has 103 places, 94 transitions, 235 flow. Second operand 16 states and 1400 transitions. [2021-12-14 16:49:20,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 251 transitions, 948 flow [2021-12-14 16:49:20,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 251 transitions, 944 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-12-14 16:49:20,927 INFO L242 Difference]: Finished difference. Result has 119 places, 141 transitions, 511 flow [2021-12-14 16:49:20,927 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=511, PETRI_PLACES=119, PETRI_TRANSITIONS=141} [2021-12-14 16:49:20,928 INFO L334 CegarLoopForPetriNet]: 96 programPoint places, 23 predicate places. [2021-12-14 16:49:20,928 INFO L470 AbstractCegarLoop]: Abstraction has has 119 places, 141 transitions, 511 flow [2021-12-14 16:49:20,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.22222222222223) internal successors, (704), 9 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:20,929 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:20,929 INFO L254 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] [2021-12-14 16:49:20,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:49:21,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:49:21,140 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:49:21,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:21,141 INFO L85 PathProgramCache]: Analyzing trace with hash 999764863, now seen corresponding path program 2 times [2021-12-14 16:49:21,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:21,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550902099] [2021-12-14 16:49:21,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:21,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:21,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:21,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:21,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550902099] [2021-12-14 16:49:21,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550902099] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:49:21,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371347553] [2021-12-14 16:49:21,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 16:49:21,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:49:21,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:49:21,317 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) [2021-12-14 16:49:21,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:49:21,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:49:21,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:49:21,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 16:49:21,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:49:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:21,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:49:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:23,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371347553] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 16:49:23,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:49:23,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 7] total 12 [2021-12-14 16:49:23,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532591964] [2021-12-14 16:49:23,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:23,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:49:23,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:23,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:49:23,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-14 16:49:23,929 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 107 [2021-12-14 16:49:23,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 141 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) [2021-12-14 16:49:23,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:23,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 107 [2021-12-14 16:49:23,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:24,394 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([244] L41-5-->L42: Formula: (< (mod v_thread1Thread1of1ForFork1_~i~0_5 4294967296) (mod v_~a~0_2 4294967296)) InVars {~a~0=v_~a~0_2, thread1Thread1of1ForFork1_~i~0=v_thread1Thread1of1ForFork1_~i~0_5} OutVars{~a~0=v_~a~0_2, thread1Thread1of1ForFork1_~i~0=v_thread1Thread1of1ForFork1_~i~0_5} AuxVars[] AssignedVars[][135], [Black: 492#(or (<= (div (+ (- 1) (* ~a~0 (- 4294967295))) (- 4294967296)) (+ (div (+ (- 1) (* ~a~0 4294967295) (* (mod thread2Thread1of1ForFork2_~i~1 4294967296) (- 1))) 4294967296) 1)) (< (mod (+ thread1Thread1of1ForFork1_~i~0 1) 4294967296) (mod ~a~0 4294967296))), 113#true, Black: 116#(and (= ~x_2~0 0) (= ~x_1~0 0)), Black: 619#(and (or (<= (div (+ (- 1) (* ~a~0 (- 4294967295))) (- 4294967296)) (+ (div (+ (- 1) (* ~a~0 4294967295) (* (mod thread2Thread1of1ForFork2_~i~1 4294967296) (- 1))) 4294967296) 1)) (< (mod (+ thread1Thread1of1ForFork1_~i~0 1) 4294967296) (mod ~a~0 4294967296))) (or (< (mod (+ thread1Thread1of1ForFork1_~i~0 1) 4294967296) (mod ~a~0 4294967296)) (<= (+ (* 4294967296 (div (+ ~b~0 ~a~0) 4294967296)) 1) (+ ~b~0 ~a~0))) (or (< (mod thread1Thread1of1ForFork1_~i~0 4294967296) (mod ~a~0 4294967296)) (<= (+ (* 4294967296 (div (+ ~b~0 ~a~0) 4294967296)) 1) (+ ~b~0 ~a~0)))), Black: 631#(and (or (<= (div (+ (- 1) (* ~a~0 (- 4294967295))) (- 4294967296)) (+ (div (+ (- 1) (* ~a~0 4294967295) (* (mod thread2Thread1of1ForFork2_~i~1 4294967296) (- 1))) 4294967296) 1)) (< (mod (+ thread1Thread1of1ForFork1_~i~0 1) 4294967296) (mod ~a~0 4294967296))) (< (mod thread3Thread1of1ForFork0_~i~2 4294967296) (mod (+ ~b~0 ~a~0) 4294967296))), Black: 117#(and (= ~x_2~0 0) (= ~x_3~0 0) (= ~x_1~0 0)), 59#L74-4true, 69#L42true, 38#L49-6true, 615#(and (<= (div (+ (- 1) (* ~a~0 (- 4294967295))) (- 4294967296)) (+ (div (+ (- 1) (* ~a~0 4294967295)) 4294967296) 1)) (or (< (mod thread1Thread1of1ForFork1_~i~0 4294967296) (mod ~a~0 4294967296)) (<= (+ (* 4294967296 (div (+ ~b~0 ~a~0) 4294967296)) 1) (+ ~b~0 ~a~0)))), 1123#(and (<= (div (+ (- 1) (* ~a~0 (- 1))) (- 4294967296)) (+ (div (+ (- 1) (* (mod thread3Thread1of1ForFork0_~i~2 4294967296) (- 1)) ~a~0) 4294967296) 1)) (<= (+ (* 4294967296 (div ~b~0 4294967296)) 1) ~b~0)), Black: 627#(and (<= (div (+ (- 1) (* ~a~0 (- 4294967295))) (- 4294967296)) (+ (div (+ (- 1) (* ~a~0 4294967295)) 4294967296) 1)) (<= (+ (* 4294967296 (div (+ ~b~0 ~a~0) 4294967296)) 1) (+ ~b~0 ~a~0))), Black: 633#(and (or (<= (div (+ (- 1) (* ~a~0 (- 4294967295))) (- 4294967296)) (+ (div (+ (- 1) (* ~a~0 4294967295) (* (mod thread2Thread1of1ForFork2_~i~1 4294967296) (- 1))) 4294967296) 1)) (< (mod (+ thread1Thread1of1ForFork1_~i~0 1) 4294967296) (mod ~a~0 4294967296))) (<= (+ (* 4294967296 (div (+ ~b~0 ~a~0) 4294967296)) 1) (+ ~b~0 ~a~0))), Black: 617#(and (or (<= (div (+ (- 1) (* ~a~0 (- 4294967295))) (- 4294967296)) (+ (div (+ (- 1) (* ~a~0 4294967295) (* (mod thread2Thread1of1ForFork2_~i~1 4294967296) (- 1))) 4294967296) 1)) (< (mod (+ thread1Thread1of1ForFork1_~i~0 1) 4294967296) (mod ~a~0 4294967296))) (or (< (mod thread1Thread1of1ForFork1_~i~0 4294967296) (mod ~a~0 4294967296)) (<= (+ (* 4294967296 (div (+ ~b~0 ~a~0) 4294967296)) 1) (+ ~b~0 ~a~0)))), 68#L57-6true, Black: 625#(and (<= (div (+ (- 1) (* ~a~0 (- 4294967295))) (- 4294967296)) (+ (div (+ (- 1) (* ~a~0 4294967295)) 4294967296) 1)) (or (< (mod (+ |thread1Thread1of1ForFork1_#t~post1| 1) 4294967296) (mod ~a~0 4294967296)) (<= (+ (* 4294967296 (div (+ ~b~0 ~a~0) 4294967296)) 1) (+ ~b~0 ~a~0))) (or (< (mod thread1Thread1of1ForFork1_~i~0 4294967296) (mod ~a~0 4294967296)) (<= (+ (* 4294967296 (div (+ ~b~0 ~a~0) 4294967296)) 1) (+ ~b~0 ~a~0)))), Black: 629#(and (<= (div (+ (- 1) (* ~a~0 (- 4294967295))) (- 4294967296)) (+ (div (+ (- 1) (* ~a~0 4294967295)) 4294967296) 1)) (< (mod thread3Thread1of1ForFork0_~i~2 4294967296) (mod (+ ~b~0 ~a~0) 4294967296)))]) [2021-12-14 16:49:24,394 INFO L384 tUnfolder$Statistics]: this new event has 59 ancestors and is cut-off event [2021-12-14 16:49:24,395 INFO L387 tUnfolder$Statistics]: existing Event has 54 ancestors and is cut-off event [2021-12-14 16:49:24,395 INFO L387 tUnfolder$Statistics]: existing Event has 54 ancestors and is cut-off event [2021-12-14 16:49:24,395 INFO L387 tUnfolder$Statistics]: existing Event has 54 ancestors and is cut-off event [2021-12-14 16:49:24,395 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([243] L41-5-->L41-6: Formula: (not (< (mod v_thread1Thread1of1ForFork1_~i~0_3 4294967296) (mod v_~a~0_1 4294967296))) InVars {~a~0=v_~a~0_1, thread1Thread1of1ForFork1_~i~0=v_thread1Thread1of1ForFork1_~i~0_3} OutVars{~a~0=v_~a~0_1, thread1Thread1of1ForFork1_~i~0=v_thread1Thread1of1ForFork1_~i~0_3} AuxVars[] AssignedVars[][136], [Black: 615#(and (<= (div (+ (- 1) (* ~a~0 (- 4294967295))) (- 4294967296)) (+ (div (+ (- 1) (* ~a~0 4294967295)) 4294967296) 1)) (or (< (mod thread1Thread1of1ForFork1_~i~0 4294967296) (mod ~a~0 4294967296)) (<= (+ (* 4294967296 (div (+ ~b~0 ~a~0) 4294967296)) 1) (+ ~b~0 ~a~0)))), Black: 492#(or (<= (div (+ (- 1) (* ~a~0 (- 4294967295))) (- 4294967296)) (+ (div (+ (- 1) (* ~a~0 4294967295) (* (mod thread2Thread1of1ForFork2_~i~1 4294967296) (- 1))) 4294967296) 1)) (< (mod (+ thread1Thread1of1ForFork1_~i~0 1) 4294967296) (mod ~a~0 4294967296))), 113#true, Black: 116#(and (= ~x_2~0 0) (= ~x_1~0 0)), Black: 619#(and (or (<= (div (+ (- 1) (* ~a~0 (- 4294967295))) (- 4294967296)) (+ (div (+ (- 1) (* ~a~0 4294967295) (* (mod thread2Thread1of1ForFork2_~i~1 4294967296) (- 1))) 4294967296) 1)) (< (mod (+ thread1Thread1of1ForFork1_~i~0 1) 4294967296) (mod ~a~0 4294967296))) (or (< (mod (+ thread1Thread1of1ForFork1_~i~0 1) 4294967296) (mod ~a~0 4294967296)) (<= (+ (* 4294967296 (div (+ ~b~0 ~a~0) 4294967296)) 1) (+ ~b~0 ~a~0))) (or (< (mod thread1Thread1of1ForFork1_~i~0 4294967296) (mod ~a~0 4294967296)) (<= (+ (* 4294967296 (div (+ ~b~0 ~a~0) 4294967296)) 1) (+ ~b~0 ~a~0)))), Black: 631#(and (or (<= (div (+ (- 1) (* ~a~0 (- 4294967295))) (- 4294967296)) (+ (div (+ (- 1) (* ~a~0 4294967295) (* (mod thread2Thread1of1ForFork2_~i~1 4294967296) (- 1))) 4294967296) 1)) (< (mod (+ thread1Thread1of1ForFork1_~i~0 1) 4294967296) (mod ~a~0 4294967296))) (< (mod thread3Thread1of1ForFork0_~i~2 4294967296) (mod (+ ~b~0 ~a~0) 4294967296))), Black: 117#(and (= ~x_2~0 0) (= ~x_3~0 0) (= ~x_1~0 0)), 59#L74-4true, 496#(<= (div (+ (- 1) (* ~a~0 (- 4294967295))) (- 4294967296)) (+ (div (+ (- 1) (* ~a~0 4294967295)) 4294967296) 1)), 38#L49-6true, 40#L41-6true, 1123#(and (<= (div (+ (- 1) (* ~a~0 (- 1))) (- 4294967296)) (+ (div (+ (- 1) (* (mod thread3Thread1of1ForFork0_~i~2 4294967296) (- 1)) ~a~0) 4294967296) 1)) (<= (+ (* 4294967296 (div ~b~0 4294967296)) 1) ~b~0)), Black: 627#(and (<= (div (+ (- 1) (* ~a~0 (- 4294967295))) (- 4294967296)) (+ (div (+ (- 1) (* ~a~0 4294967295)) 4294967296) 1)) (<= (+ (* 4294967296 (div (+ ~b~0 ~a~0) 4294967296)) 1) (+ ~b~0 ~a~0))), Black: 633#(and (or (<= (div (+ (- 1) (* ~a~0 (- 4294967295))) (- 4294967296)) (+ (div (+ (- 1) (* ~a~0 4294967295) (* (mod thread2Thread1of1ForFork2_~i~1 4294967296) (- 1))) 4294967296) 1)) (< (mod (+ thread1Thread1of1ForFork1_~i~0 1) 4294967296) (mod ~a~0 4294967296))) (<= (+ (* 4294967296 (div (+ ~b~0 ~a~0) 4294967296)) 1) (+ ~b~0 ~a~0))), Black: 617#(and (or (<= (div (+ (- 1) (* ~a~0 (- 4294967295))) (- 4294967296)) (+ (div (+ (- 1) (* ~a~0 4294967295) (* (mod thread2Thread1of1ForFork2_~i~1 4294967296) (- 1))) 4294967296) 1)) (< (mod (+ thread1Thread1of1ForFork1_~i~0 1) 4294967296) (mod ~a~0 4294967296))) (or (< (mod thread1Thread1of1ForFork1_~i~0 4294967296) (mod ~a~0 4294967296)) (<= (+ (* 4294967296 (div (+ ~b~0 ~a~0) 4294967296)) 1) (+ ~b~0 ~a~0)))), 68#L57-6true, Black: 625#(and (<= (div (+ (- 1) (* ~a~0 (- 4294967295))) (- 4294967296)) (+ (div (+ (- 1) (* ~a~0 4294967295)) 4294967296) 1)) (or (< (mod (+ |thread1Thread1of1ForFork1_#t~post1| 1) 4294967296) (mod ~a~0 4294967296)) (<= (+ (* 4294967296 (div (+ ~b~0 ~a~0) 4294967296)) 1) (+ ~b~0 ~a~0))) (or (< (mod thread1Thread1of1ForFork1_~i~0 4294967296) (mod ~a~0 4294967296)) (<= (+ (* 4294967296 (div (+ ~b~0 ~a~0) 4294967296)) 1) (+ ~b~0 ~a~0)))), Black: 629#(and (<= (div (+ (- 1) (* ~a~0 (- 4294967295))) (- 4294967296)) (+ (div (+ (- 1) (* ~a~0 4294967295)) 4294967296) 1)) (< (mod thread3Thread1of1ForFork0_~i~2 4294967296) (mod (+ ~b~0 ~a~0) 4294967296)))]) [2021-12-14 16:49:24,395 INFO L384 tUnfolder$Statistics]: this new event has 59 ancestors and is cut-off event [2021-12-14 16:49:24,395 INFO L387 tUnfolder$Statistics]: existing Event has 54 ancestors and is cut-off event [2021-12-14 16:49:24,396 INFO L387 tUnfolder$Statistics]: existing Event has 54 ancestors and is cut-off event [2021-12-14 16:49:24,396 INFO L387 tUnfolder$Statistics]: existing Event has 54 ancestors and is cut-off event [2021-12-14 16:49:24,621 INFO L129 PetriNetUnfolder]: 1869/4208 cut-off events. [2021-12-14 16:49:24,622 INFO L130 PetriNetUnfolder]: For 3886/3969 co-relation queries the response was YES. [2021-12-14 16:49:24,638 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10486 conditions, 4208 events. 1869/4208 cut-off events. For 3886/3969 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 35175 event pairs, 329 based on Foata normal form. 75/4168 useless extension candidates. Maximal degree in co-relation 7876. Up to 579 conditions per place. [2021-12-14 16:49:24,662 INFO L132 encePairwiseOnDemand]: 99/107 looper letters, 172 selfloop transitions, 37 changer transitions 0/290 dead transitions. [2021-12-14 16:49:24,663 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 290 transitions, 1593 flow [2021-12-14 16:49:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:49:24,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:49:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 917 transitions. [2021-12-14 16:49:24,666 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8570093457943925 [2021-12-14 16:49:24,666 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 917 transitions. [2021-12-14 16:49:24,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 917 transitions. [2021-12-14 16:49:24,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:24,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 917 transitions. [2021-12-14 16:49:24,669 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) [2021-12-14 16:49:24,671 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) [2021-12-14 16:49:24,671 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) [2021-12-14 16:49:24,671 INFO L186 Difference]: Start difference. First operand has 119 places, 141 transitions, 511 flow. Second operand 10 states and 917 transitions. [2021-12-14 16:49:24,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 290 transitions, 1593 flow [2021-12-14 16:49:24,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 290 transitions, 1593 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-14 16:49:24,756 INFO L242 Difference]: Finished difference. Result has 134 places, 169 transitions, 810 flow [2021-12-14 16:49:24,756 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=810, PETRI_PLACES=134, PETRI_TRANSITIONS=169} [2021-12-14 16:49:24,757 INFO L334 CegarLoopForPetriNet]: 96 programPoint places, 38 predicate places. [2021-12-14 16:49:24,757 INFO L470 AbstractCegarLoop]: Abstraction has has 134 places, 169 transitions, 810 flow [2021-12-14 16:49:24,757 INFO L471 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) [2021-12-14 16:49:24,757 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:24,758 INFO L254 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] [2021-12-14 16:49:24,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:49:24,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-14 16:49:24,958 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:49:24,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:24,959 INFO L85 PathProgramCache]: Analyzing trace with hash -115254571, now seen corresponding path program 1 times [2021-12-14 16:49:24,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:24,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539887882] [2021-12-14 16:49:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:24,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:25,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:25,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539887882] [2021-12-14 16:49:25,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539887882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:25,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:25,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:49:25,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218127590] [2021-12-14 16:49:25,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:25,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:49:25,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:25,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:49:25,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:49:25,146 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 107 [2021-12-14 16:49:25,147 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 169 transitions, 810 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) [2021-12-14 16:49:25,147 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:25,147 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 107 [2021-12-14 16:49:25,147 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:26,053 INFO L129 PetriNetUnfolder]: 2828/6266 cut-off events. [2021-12-14 16:49:26,053 INFO L130 PetriNetUnfolder]: For 12216/12259 co-relation queries the response was YES. [2021-12-14 16:49:26,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18433 conditions, 6266 events. 2828/6266 cut-off events. For 12216/12259 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 55569 event pairs, 1275 based on Foata normal form. 14/6099 useless extension candidates. Maximal degree in co-relation 12157. Up to 2451 conditions per place. [2021-12-14 16:49:26,114 INFO L132 encePairwiseOnDemand]: 97/107 looper letters, 180 selfloop transitions, 17 changer transitions 6/273 dead transitions. [2021-12-14 16:49:26,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 273 transitions, 1828 flow [2021-12-14 16:49:26,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:49:26,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-14 16:49:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 697 transitions. [2021-12-14 16:49:26,117 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8142523364485982 [2021-12-14 16:49:26,118 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 697 transitions. [2021-12-14 16:49:26,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 697 transitions. [2021-12-14 16:49:26,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:26,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 697 transitions. [2021-12-14 16:49:26,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 87.125) internal successors, (697), 8 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:26,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 107.0) internal successors, (963), 9 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:26,122 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 107.0) internal successors, (963), 9 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:26,122 INFO L186 Difference]: Start difference. First operand has 134 places, 169 transitions, 810 flow. Second operand 8 states and 697 transitions. [2021-12-14 16:49:26,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 273 transitions, 1828 flow [2021-12-14 16:49:26,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 273 transitions, 1792 flow, removed 18 selfloop flow, removed 0 redundant places. [2021-12-14 16:49:26,182 INFO L242 Difference]: Finished difference. Result has 146 places, 183 transitions, 959 flow [2021-12-14 16:49:26,182 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=959, PETRI_PLACES=146, PETRI_TRANSITIONS=183} [2021-12-14 16:49:26,183 INFO L334 CegarLoopForPetriNet]: 96 programPoint places, 50 predicate places. [2021-12-14 16:49:26,183 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 183 transitions, 959 flow [2021-12-14 16:49:26,184 INFO L471 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) [2021-12-14 16:49:26,184 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:26,184 INFO L254 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] [2021-12-14 16:49:26,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:49:26,184 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:49:26,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:26,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1601310449, now seen corresponding path program 1 times [2021-12-14 16:49:26,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:26,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378984055] [2021-12-14 16:49:26,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:26,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:26,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:26,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378984055] [2021-12-14 16:49:26,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378984055] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:49:26,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144287563] [2021-12-14 16:49:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:26,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:49:26,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:49:26,368 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) [2021-12-14 16:49:26,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:49:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:26,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 16:49:26,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:49:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:26,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:49:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:30,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144287563] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:49:30,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:49:30,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2021-12-14 16:49:30,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958950084] [2021-12-14 16:49:30,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:49:30,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-14 16:49:30,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:30,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-14 16:49:30,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-12-14 16:49:30,229 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 107 [2021-12-14 16:49:30,232 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 183 transitions, 959 flow. Second operand has 23 states, 23 states have (on average 77.78260869565217) internal successors, (1789), 23 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:30,232 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:30,232 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 107 [2021-12-14 16:49:30,232 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:34,275 INFO L129 PetriNetUnfolder]: 6065/12152 cut-off events. [2021-12-14 16:49:34,275 INFO L130 PetriNetUnfolder]: For 29790/29832 co-relation queries the response was YES. [2021-12-14 16:49:34,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40320 conditions, 12152 events. 6065/12152 cut-off events. For 29790/29832 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 112508 event pairs, 845 based on Foata normal form. 22/11963 useless extension candidates. Maximal degree in co-relation 33935. Up to 1766 conditions per place. [2021-12-14 16:49:34,433 INFO L132 encePairwiseOnDemand]: 94/107 looper letters, 451 selfloop transitions, 295 changer transitions 0/815 dead transitions. [2021-12-14 16:49:34,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 815 transitions, 6597 flow [2021-12-14 16:49:34,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-14 16:49:34,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-12-14 16:49:34,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3469 transitions. [2021-12-14 16:49:34,442 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8105140186915888 [2021-12-14 16:49:34,442 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3469 transitions. [2021-12-14 16:49:34,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3469 transitions. [2021-12-14 16:49:34,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:34,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3469 transitions. [2021-12-14 16:49:34,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 86.725) internal successors, (3469), 40 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:34,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 107.0) internal successors, (4387), 41 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:34,562 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 107.0) internal successors, (4387), 41 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:34,562 INFO L186 Difference]: Start difference. First operand has 146 places, 183 transitions, 959 flow. Second operand 40 states and 3469 transitions. [2021-12-14 16:49:34,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 815 transitions, 6597 flow [2021-12-14 16:49:34,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 815 transitions, 6501 flow, removed 19 selfloop flow, removed 3 redundant places. [2021-12-14 16:49:34,738 INFO L242 Difference]: Finished difference. Result has 214 places, 447 transitions, 4260 flow [2021-12-14 16:49:34,738 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=4260, PETRI_PLACES=214, PETRI_TRANSITIONS=447} [2021-12-14 16:49:34,741 INFO L334 CegarLoopForPetriNet]: 96 programPoint places, 118 predicate places. [2021-12-14 16:49:34,741 INFO L470 AbstractCegarLoop]: Abstraction has has 214 places, 447 transitions, 4260 flow [2021-12-14 16:49:34,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 77.78260869565217) internal successors, (1789), 23 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:34,743 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:34,743 INFO L254 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] [2021-12-14 16:49:34,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 16:49:34,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:49:34,959 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:49:34,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:34,960 INFO L85 PathProgramCache]: Analyzing trace with hash -897693605, now seen corresponding path program 2 times [2021-12-14 16:49:34,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:34,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493055317] [2021-12-14 16:49:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:34,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:35,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:35,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493055317] [2021-12-14 16:49:35,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493055317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:49:35,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034071787] [2021-12-14 16:49:35,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 16:49:35,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:49:35,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:49:35,120 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) [2021-12-14 16:49:35,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 16:49:35,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:49:35,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:49:35,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 16:49:35,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:49:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:35,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:49:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:37,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034071787] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 16:49:37,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:49:37,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 10] total 16 [2021-12-14 16:49:37,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708166545] [2021-12-14 16:49:37,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:37,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:49:37,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:37,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:49:37,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:49:37,919 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 107 [2021-12-14 16:49:37,919 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 447 transitions, 4260 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) [2021-12-14 16:49:37,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:37,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 107 [2021-12-14 16:49:37,920 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:40,216 INFO L129 PetriNetUnfolder]: 5809/12846 cut-off events. [2021-12-14 16:49:40,216 INFO L130 PetriNetUnfolder]: For 140345/140769 co-relation queries the response was YES. [2021-12-14 16:49:40,298 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62969 conditions, 12846 events. 5809/12846 cut-off events. For 140345/140769 co-relation queries the response was YES. Maximal size of possible extension queue 1027. Compared 128168 event pairs, 1073 based on Foata normal form. 199/12539 useless extension candidates. Maximal degree in co-relation 61295. Up to 1779 conditions per place. [2021-12-14 16:49:40,429 INFO L132 encePairwiseOnDemand]: 99/107 looper letters, 173 selfloop transitions, 284 changer transitions 0/614 dead transitions. [2021-12-14 16:49:40,429 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 614 transitions, 6893 flow [2021-12-14 16:49:40,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:49:40,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:49:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 915 transitions. [2021-12-14 16:49:40,432 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8551401869158879 [2021-12-14 16:49:40,433 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 915 transitions. [2021-12-14 16:49:40,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 915 transitions. [2021-12-14 16:49:40,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:40,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 915 transitions. [2021-12-14 16:49:40,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 91.5) internal successors, (915), 10 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:40,438 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) [2021-12-14 16:49:40,439 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) [2021-12-14 16:49:40,439 INFO L186 Difference]: Start difference. First operand has 214 places, 447 transitions, 4260 flow. Second operand 10 states and 915 transitions. [2021-12-14 16:49:40,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 614 transitions, 6893 flow [2021-12-14 16:49:41,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 614 transitions, 6573 flow, removed 160 selfloop flow, removed 0 redundant places. [2021-12-14 16:49:41,282 INFO L242 Difference]: Finished difference. Result has 229 places, 511 transitions, 5678 flow [2021-12-14 16:49:41,283 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=3992, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5678, PETRI_PLACES=229, PETRI_TRANSITIONS=511} [2021-12-14 16:49:41,283 INFO L334 CegarLoopForPetriNet]: 96 programPoint places, 133 predicate places. [2021-12-14 16:49:41,284 INFO L470 AbstractCegarLoop]: Abstraction has has 229 places, 511 transitions, 5678 flow [2021-12-14 16:49:41,285 INFO L471 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) [2021-12-14 16:49:41,285 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:41,286 INFO L254 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] [2021-12-14 16:49:41,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 16:49:41,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:49:41,489 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:49:41,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:41,490 INFO L85 PathProgramCache]: Analyzing trace with hash -513244455, now seen corresponding path program 3 times [2021-12-14 16:49:41,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:41,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452701829] [2021-12-14 16:49:41,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:41,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:41,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:41,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452701829] [2021-12-14 16:49:41,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452701829] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:49:41,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723853882] [2021-12-14 16:49:41,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 16:49:41,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:49:41,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:49:41,638 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) [2021-12-14 16:49:41,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 16:49:41,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 16:49:41,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:49:41,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 16:49:41,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:49:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:42,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:49:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:45,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723853882] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 16:49:45,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:49:45,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 14 [2021-12-14 16:49:45,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512706303] [2021-12-14 16:49:45,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:45,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:49:45,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:45,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:49:45,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:49:45,234 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 107 [2021-12-14 16:49:45,234 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 511 transitions, 5678 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) [2021-12-14 16:49:45,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:45,235 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 107 [2021-12-14 16:49:45,235 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:47,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-14 16:49:49,563 INFO L129 PetriNetUnfolder]: 5614/12171 cut-off events. [2021-12-14 16:49:49,564 INFO L130 PetriNetUnfolder]: For 146878/147153 co-relation queries the response was YES. [2021-12-14 16:49:49,647 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62112 conditions, 12171 events. 5614/12171 cut-off events. For 146878/147153 co-relation queries the response was YES. Maximal size of possible extension queue 1084. Compared 121105 event pairs, 1110 based on Foata normal form. 180/12040 useless extension candidates. Maximal degree in co-relation 61343. Up to 2022 conditions per place. [2021-12-14 16:49:49,729 INFO L132 encePairwiseOnDemand]: 99/107 looper letters, 359 selfloop transitions, 183 changer transitions 0/732 dead transitions. [2021-12-14 16:49:49,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 732 transitions, 8968 flow [2021-12-14 16:49:49,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:49:49,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:49:49,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 822 transitions. [2021-12-14 16:49:49,732 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8535825545171339 [2021-12-14 16:49:49,732 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 822 transitions. [2021-12-14 16:49:49,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 822 transitions. [2021-12-14 16:49:49,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:49,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 822 transitions. [2021-12-14 16:49:49,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.33333333333333) internal successors, (822), 9 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:49,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:49,737 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:49,737 INFO L186 Difference]: Start difference. First operand has 229 places, 511 transitions, 5678 flow. Second operand 9 states and 822 transitions. [2021-12-14 16:49:49,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 732 transitions, 8968 flow [2021-12-14 16:49:50,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 732 transitions, 8898 flow, removed 29 selfloop flow, removed 1 redundant places. [2021-12-14 16:49:50,493 INFO L242 Difference]: Finished difference. Result has 240 places, 560 transitions, 6670 flow [2021-12-14 16:49:50,493 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=5629, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6670, PETRI_PLACES=240, PETRI_TRANSITIONS=560} [2021-12-14 16:49:50,494 INFO L334 CegarLoopForPetriNet]: 96 programPoint places, 144 predicate places. [2021-12-14 16:49:50,494 INFO L470 AbstractCegarLoop]: Abstraction has has 240 places, 560 transitions, 6670 flow [2021-12-14 16:49:50,495 INFO L471 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) [2021-12-14 16:49:50,495 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:50,495 INFO L254 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] [2021-12-14 16:49:50,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 16:49:50,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:49:50,706 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:49:50,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:50,707 INFO L85 PathProgramCache]: Analyzing trace with hash -127849359, now seen corresponding path program 4 times [2021-12-14 16:49:50,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:50,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123122671] [2021-12-14 16:49:50,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:50,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:50,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:50,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123122671] [2021-12-14 16:49:50,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123122671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:49:50,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:49:50,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:49:50,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340404569] [2021-12-14 16:49:50,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:50,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:49:50,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:50,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:49:50,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:49:50,832 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 107 [2021-12-14 16:49:50,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 560 transitions, 6670 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) [2021-12-14 16:49:50,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:50,833 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 107 [2021-12-14 16:49:50,833 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:49:54,387 INFO L129 PetriNetUnfolder]: 9660/19858 cut-off events. [2021-12-14 16:49:54,387 INFO L130 PetriNetUnfolder]: For 231455/231692 co-relation queries the response was YES. [2021-12-14 16:49:54,545 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102700 conditions, 19858 events. 9660/19858 cut-off events. For 231455/231692 co-relation queries the response was YES. Maximal size of possible extension queue 1465. Compared 202803 event pairs, 3802 based on Foata normal form. 102/19317 useless extension candidates. Maximal degree in co-relation 101520. Up to 7075 conditions per place. [2021-12-14 16:49:54,773 INFO L132 encePairwiseOnDemand]: 97/107 looper letters, 572 selfloop transitions, 144 changer transitions 2/793 dead transitions. [2021-12-14 16:49:54,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 793 transitions, 11020 flow [2021-12-14 16:49:54,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:49:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:49:54,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 899 transitions. [2021-12-14 16:49:54,778 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8401869158878504 [2021-12-14 16:49:54,778 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 899 transitions. [2021-12-14 16:49:54,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 899 transitions. [2021-12-14 16:49:54,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:49:54,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 899 transitions. [2021-12-14 16:49:54,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 89.9) internal successors, (899), 10 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:49:54,784 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) [2021-12-14 16:49:54,785 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) [2021-12-14 16:49:54,785 INFO L186 Difference]: Start difference. First operand has 240 places, 560 transitions, 6670 flow. Second operand 10 states and 899 transitions. [2021-12-14 16:49:54,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 793 transitions, 11020 flow [2021-12-14 16:49:55,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 793 transitions, 10761 flow, removed 48 selfloop flow, removed 2 redundant places. [2021-12-14 16:49:55,957 INFO L242 Difference]: Finished difference. Result has 253 places, 632 transitions, 8087 flow [2021-12-14 16:49:55,957 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=6516, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8087, PETRI_PLACES=253, PETRI_TRANSITIONS=632} [2021-12-14 16:49:55,958 INFO L334 CegarLoopForPetriNet]: 96 programPoint places, 157 predicate places. [2021-12-14 16:49:55,958 INFO L470 AbstractCegarLoop]: Abstraction has has 253 places, 632 transitions, 8087 flow [2021-12-14 16:49:55,958 INFO L471 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) [2021-12-14 16:49:55,958 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:49:55,959 INFO L254 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] [2021-12-14 16:49:55,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:49:55,959 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:49:55,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:49:55,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1078593511, now seen corresponding path program 5 times [2021-12-14 16:49:55,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:49:55,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747625112] [2021-12-14 16:49:55,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:49:55,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:49:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:49:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:56,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:49:56,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747625112] [2021-12-14 16:49:56,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747625112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:49:56,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25456393] [2021-12-14 16:49:56,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 16:49:56,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:49:56,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:49:56,080 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) [2021-12-14 16:49:56,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 16:49:56,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:49:56,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:49:56,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 16:49:56,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:49:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:56,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:49:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:49:57,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25456393] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 16:49:57,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:49:57,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 10] total 16 [2021-12-14 16:49:57,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122867472] [2021-12-14 16:49:57,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:49:57,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:49:57,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:49:57,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:49:57,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:49:57,518 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 107 [2021-12-14 16:49:57,519 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 632 transitions, 8087 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) [2021-12-14 16:49:57,519 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:49:57,519 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 107 [2021-12-14 16:49:57,519 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:50:00,758 INFO L129 PetriNetUnfolder]: 7749/16668 cut-off events. [2021-12-14 16:50:00,758 INFO L130 PetriNetUnfolder]: For 223246/223654 co-relation queries the response was YES. [2021-12-14 16:50:00,882 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89727 conditions, 16668 events. 7749/16668 cut-off events. For 223246/223654 co-relation queries the response was YES. Maximal size of possible extension queue 1357. Compared 173349 event pairs, 1258 based on Foata normal form. 282/16471 useless extension candidates. Maximal degree in co-relation 89126. Up to 2207 conditions per place. [2021-12-14 16:50:00,964 INFO L132 encePairwiseOnDemand]: 99/107 looper letters, 446 selfloop transitions, 258 changer transitions 2/916 dead transitions. [2021-12-14 16:50:00,964 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 916 transitions, 13129 flow [2021-12-14 16:50:00,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:50:00,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:50:00,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 917 transitions. [2021-12-14 16:50:00,966 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8570093457943925 [2021-12-14 16:50:00,966 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 917 transitions. [2021-12-14 16:50:00,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 917 transitions. [2021-12-14 16:50:00,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:50:00,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 917 transitions. [2021-12-14 16:50:00,968 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) [2021-12-14 16:50:00,970 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) [2021-12-14 16:50:00,970 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) [2021-12-14 16:50:00,970 INFO L186 Difference]: Start difference. First operand has 253 places, 632 transitions, 8087 flow. Second operand 10 states and 917 transitions. [2021-12-14 16:50:00,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 916 transitions, 13129 flow [2021-12-14 16:50:02,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 916 transitions, 12835 flow, removed 147 selfloop flow, removed 0 redundant places. [2021-12-14 16:50:02,128 INFO L242 Difference]: Finished difference. Result has 265 places, 675 transitions, 9408 flow [2021-12-14 16:50:02,129 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=7947, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9408, PETRI_PLACES=265, PETRI_TRANSITIONS=675} [2021-12-14 16:50:02,129 INFO L334 CegarLoopForPetriNet]: 96 programPoint places, 169 predicate places. [2021-12-14 16:50:02,129 INFO L470 AbstractCegarLoop]: Abstraction has has 265 places, 675 transitions, 9408 flow [2021-12-14 16:50:02,130 INFO L471 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) [2021-12-14 16:50:02,130 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:50:02,130 INFO L254 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] [2021-12-14 16:50:02,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 16:50:02,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:50:02,331 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:50:02,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:50:02,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1791660597, now seen corresponding path program 6 times [2021-12-14 16:50:02,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:50:02,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969297232] [2021-12-14 16:50:02,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:50:02,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:50:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:50:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:50:02,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:50:02,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969297232] [2021-12-14 16:50:02,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969297232] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:50:02,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030930953] [2021-12-14 16:50:02,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 16:50:02,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:50:02,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:50:02,489 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) [2021-12-14 16:50:02,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 16:50:02,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-14 16:50:02,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:50:02,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 16:50:02,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:50:02,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:50:02,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:50:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:50:07,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030930953] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 16:50:07,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:50:07,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 10] total 17 [2021-12-14 16:50:07,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645719338] [2021-12-14 16:50:07,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:50:07,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:50:07,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:50:07,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:50:07,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:50:07,111 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 107 [2021-12-14 16:50:07,112 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 675 transitions, 9408 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) [2021-12-14 16:50:07,112 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:50:07,112 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 107 [2021-12-14 16:50:07,112 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:50:10,268 INFO L129 PetriNetUnfolder]: 7815/16408 cut-off events. [2021-12-14 16:50:10,268 INFO L130 PetriNetUnfolder]: For 247634/248095 co-relation queries the response was YES. [2021-12-14 16:50:10,402 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93668 conditions, 16408 events. 7815/16408 cut-off events. For 247634/248095 co-relation queries the response was YES. Maximal size of possible extension queue 1336. Compared 167975 event pairs, 1807 based on Foata normal form. 318/16111 useless extension candidates. Maximal degree in co-relation 93242. Up to 2642 conditions per place. [2021-12-14 16:50:10,636 INFO L132 encePairwiseOnDemand]: 99/107 looper letters, 359 selfloop transitions, 267 changer transitions 1/837 dead transitions. [2021-12-14 16:50:10,637 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 837 transitions, 12599 flow [2021-12-14 16:50:10,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:50:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:50:10,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 824 transitions. [2021-12-14 16:50:10,639 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8556593977154725 [2021-12-14 16:50:10,640 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 824 transitions. [2021-12-14 16:50:10,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 824 transitions. [2021-12-14 16:50:10,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:50:10,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 824 transitions. [2021-12-14 16:50:10,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.55555555555556) internal successors, (824), 9 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:50:10,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:50:10,645 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:50:10,646 INFO L186 Difference]: Start difference. First operand has 265 places, 675 transitions, 9408 flow. Second operand 9 states and 824 transitions. [2021-12-14 16:50:10,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 837 transitions, 12599 flow [2021-12-14 16:50:11,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 837 transitions, 12393 flow, removed 41 selfloop flow, removed 3 redundant places. [2021-12-14 16:50:12,015 INFO L242 Difference]: Finished difference. Result has 274 places, 698 transitions, 10271 flow [2021-12-14 16:50:12,015 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=9238, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10271, PETRI_PLACES=274, PETRI_TRANSITIONS=698} [2021-12-14 16:50:12,016 INFO L334 CegarLoopForPetriNet]: 96 programPoint places, 178 predicate places. [2021-12-14 16:50:12,016 INFO L470 AbstractCegarLoop]: Abstraction has has 274 places, 698 transitions, 10271 flow [2021-12-14 16:50:12,016 INFO L471 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) [2021-12-14 16:50:12,016 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:50:12,016 INFO L254 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] [2021-12-14 16:50:12,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-14 16:50:12,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:50:12,222 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:50:12,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:50:12,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1147364865, now seen corresponding path program 7 times [2021-12-14 16:50:12,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:50:12,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000848315] [2021-12-14 16:50:12,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:50:12,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:50:12,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:50:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:50:12,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:50:12,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000848315] [2021-12-14 16:50:12,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000848315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:50:12,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119924499] [2021-12-14 16:50:12,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 16:50:12,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:50:12,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:50:12,376 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:50:12,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 16:50:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:50:12,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 16:50:12,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:50:13,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:50:13,147 INFO L328 TraceCheckSpWp]: Computing backward predicates...