./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.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 0307f20ae0363cc6fed70ae0937c5000167639ab486b68a523e3313ccdd28e28 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:22:33,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:22:33,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:22:33,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:22:33,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:22:33,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:22:33,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:22:33,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:22:33,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:22:33,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:22:33,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:22:33,697 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:22:33,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:22:33,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:22:33,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:22:33,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:22:33,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:22:33,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:22:33,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:22:33,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:22:33,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:22:33,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:22:33,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:22:33,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:22:33,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:22:33,725 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:22:33,725 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:22:33,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:22:33,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:22:33,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:22:33,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:22:33,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:22:33,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:22:33,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:22:33,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:22:33,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:22:33,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:22:33,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:22:33,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:22:33,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:22:33,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:22:33,739 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 15:22:33,763 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:22:33,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:22:33,772 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:22:33,772 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:22:33,773 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:22:33,773 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:22:33,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:22:33,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:22:33,774 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:22:33,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:22:33,775 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 15:22:33,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:22:33,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 15:22:33,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:22:33,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:22:33,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:22:33,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:22:33,776 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 15:22:33,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:22:33,776 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:22:33,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:22:33,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:22:33,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:22:33,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:22:33,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:22:33,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:22:33,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:22:33,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:22:33,779 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:22:33,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:22:33,779 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:22:33,779 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:22:33,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:22:33,780 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:22:33,780 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0307f20ae0363cc6fed70ae0937c5000167639ab486b68a523e3313ccdd28e28 [2021-12-21 15:22:34,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:22:34,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:22:34,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:22:34,028 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:22:34,028 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:22:34,030 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2021-12-21 15:22:34,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9006d868/5167c206c7d24630b49bb95474d87dd6/FLAG114ddc257 [2021-12-21 15:22:34,505 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:22:34,506 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2021-12-21 15:22:34,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9006d868/5167c206c7d24630b49bb95474d87dd6/FLAG114ddc257 [2021-12-21 15:22:34,903 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9006d868/5167c206c7d24630b49bb95474d87dd6 [2021-12-21 15:22:34,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:22:34,907 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:22:34,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:22:34,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:22:34,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:22:34,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:22:34" (1/1) ... [2021-12-21 15:22:34,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@171cd7c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:34, skipping insertion in model container [2021-12-21 15:22:34,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:22:34" (1/1) ... [2021-12-21 15:22:34,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:22:34,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:22:35,083 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2021-12-21 15:22:35,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:22:35,096 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:22:35,118 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2021-12-21 15:22:35,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:22:35,132 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:22:35,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:35 WrapperNode [2021-12-21 15:22:35,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:22:35,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:22:35,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:22:35,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:22:35,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:35" (1/1) ... [2021-12-21 15:22:35,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:35" (1/1) ... [2021-12-21 15:22:35,181 INFO L137 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 102 [2021-12-21 15:22:35,182 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:22:35,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:22:35,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:22:35,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:22:35,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:35" (1/1) ... [2021-12-21 15:22:35,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:35" (1/1) ... [2021-12-21 15:22:35,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:35" (1/1) ... [2021-12-21 15:22:35,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:35" (1/1) ... [2021-12-21 15:22:35,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:35" (1/1) ... [2021-12-21 15:22:35,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:35" (1/1) ... [2021-12-21 15:22:35,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:35" (1/1) ... [2021-12-21 15:22:35,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:22:35,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:22:35,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:22:35,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:22:35,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:35" (1/1) ... [2021-12-21 15:22:35,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:22:35,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:22:35,272 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) [2021-12-21 15:22:35,296 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 [2021-12-21 15:22:35,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:22:35,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:22:35,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:22:35,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:22:35,312 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-21 15:22:35,312 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-21 15:22:35,313 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-21 15:22:35,313 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-21 15:22:35,313 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-21 15:22:35,314 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-21 15:22:35,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:22:35,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 15:22:35,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:22:35,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:22:35,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:22:35,316 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-21 15:22:35,392 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:22:35,394 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:22:35,658 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:22:35,668 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:22:35,668 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-21 15:22:35,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:22:35 BoogieIcfgContainer [2021-12-21 15:22:35,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:22:35,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:22:35,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:22:35,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:22:35,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:22:34" (1/3) ... [2021-12-21 15:22:35,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ffd5987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:22:35, skipping insertion in model container [2021-12-21 15:22:35,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:35" (2/3) ... [2021-12-21 15:22:35,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ffd5987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:22:35, skipping insertion in model container [2021-12-21 15:22:35,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:22:35" (3/3) ... [2021-12-21 15:22:35,677 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2021-12-21 15:22:35,682 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-21 15:22:35,682 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:22:35,682 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:22:35,682 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-21 15:22:35,718 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,719 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,719 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,722 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,723 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,723 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,723 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,724 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,724 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,724 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,724 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,724 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,725 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,725 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,725 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,726 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,726 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,726 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,726 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,727 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,727 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,727 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,727 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,727 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,728 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,728 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,728 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,728 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,729 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,729 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,729 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,730 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,730 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,730 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,731 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,731 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,731 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,731 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,731 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,732 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,732 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,732 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,733 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,733 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,733 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,733 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,734 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,734 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,734 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,734 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,734 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,735 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,735 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,735 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,735 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,735 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,736 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,736 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,736 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,737 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,737 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,737 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,738 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,738 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,738 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,738 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,739 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,739 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,739 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,739 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,740 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,740 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,740 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,741 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,741 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,741 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,741 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,741 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,742 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,742 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,742 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,742 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,742 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,743 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,750 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,750 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,751 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,751 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,755 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,758 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,758 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,759 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,759 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,759 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,760 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,760 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,760 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,760 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,760 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:35,765 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-21 15:22:35,802 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:22:35,808 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 [2021-12-21 15:22:35,809 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-21 15:22:35,820 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 158 places, 160 transitions, 344 flow [2021-12-21 15:22:35,874 INFO L129 PetriNetUnfolder]: 12/157 cut-off events. [2021-12-21 15:22:35,874 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-21 15:22:35,879 INFO L84 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 157 events. 12/157 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 106 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2021-12-21 15:22:35,879 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 160 transitions, 344 flow [2021-12-21 15:22:35,884 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 146 transitions, 310 flow [2021-12-21 15:22:35,944 INFO L129 PetriNetUnfolder]: 12/145 cut-off events. [2021-12-21 15:22:35,944 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-21 15:22:35,944 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:35,945 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:22:35,946 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:22:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:35,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1367986410, now seen corresponding path program 1 times [2021-12-21 15:22:35,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:35,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129627127] [2021-12-21 15:22:35,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:35,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:36,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:36,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:36,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129627127] [2021-12-21 15:22:36,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129627127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:22:36,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:22:36,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:22:36,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519600863] [2021-12-21 15:22:36,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:22:36,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:22:36,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:36,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:22:36,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:22:36,495 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 160 [2021-12-21 15:22:36,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 146 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 122.57142857142857) internal successors, (858), 7 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:36,502 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:36,502 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 160 [2021-12-21 15:22:36,504 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:36,713 INFO L129 PetriNetUnfolder]: 49/376 cut-off events. [2021-12-21 15:22:36,714 INFO L130 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2021-12-21 15:22:36,716 INFO L84 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 376 events. 49/376 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1383 event pairs, 8 based on Foata normal form. 58/404 useless extension candidates. Maximal degree in co-relation 208. Up to 45 conditions per place. [2021-12-21 15:22:36,719 INFO L132 encePairwiseOnDemand]: 139/160 looper letters, 47 selfloop transitions, 9 changer transitions 11/173 dead transitions. [2021-12-21 15:22:36,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 173 transitions, 534 flow [2021-12-21 15:22:36,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 15:22:36,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-21 15:22:36,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1397 transitions. [2021-12-21 15:22:36,748 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.79375 [2021-12-21 15:22:36,751 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1397 transitions. [2021-12-21 15:22:36,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1397 transitions. [2021-12-21 15:22:36,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:36,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1397 transitions. [2021-12-21 15:22:36,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 127.0) internal successors, (1397), 11 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:36,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:36,776 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:36,779 INFO L186 Difference]: Start difference. First operand has 144 places, 146 transitions, 310 flow. Second operand 11 states and 1397 transitions. [2021-12-21 15:22:36,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 173 transitions, 534 flow [2021-12-21 15:22:36,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 173 transitions, 498 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-21 15:22:36,793 INFO L242 Difference]: Finished difference. Result has 152 places, 140 transitions, 327 flow [2021-12-21 15:22:36,795 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=327, PETRI_PLACES=152, PETRI_TRANSITIONS=140} [2021-12-21 15:22:36,799 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 8 predicate places. [2021-12-21 15:22:36,799 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 140 transitions, 327 flow [2021-12-21 15:22:36,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.57142857142857) internal successors, (858), 7 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:36,800 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:36,801 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:22:36,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:22:36,801 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:22:36,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:36,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1354690984, now seen corresponding path program 1 times [2021-12-21 15:22:36,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:36,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571258044] [2021-12-21 15:22:36,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:36,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:36,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:36,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:36,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571258044] [2021-12-21 15:22:36,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571258044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:22:36,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:22:36,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:22:36,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557533477] [2021-12-21 15:22:36,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:22:36,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:22:36,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:36,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:22:36,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:22:36,991 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 160 [2021-12-21 15:22:36,992 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 140 transitions, 327 flow. Second operand has 7 states, 7 states have (on average 125.42857142857143) internal successors, (878), 7 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:36,993 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:36,993 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 160 [2021-12-21 15:22:36,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:37,267 INFO L129 PetriNetUnfolder]: 184/756 cut-off events. [2021-12-21 15:22:37,267 INFO L130 PetriNetUnfolder]: For 66/72 co-relation queries the response was YES. [2021-12-21 15:22:37,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 756 events. 184/756 cut-off events. For 66/72 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4268 event pairs, 85 based on Foata normal form. 0/630 useless extension candidates. Maximal degree in co-relation 1197. Up to 252 conditions per place. [2021-12-21 15:22:37,278 INFO L132 encePairwiseOnDemand]: 151/160 looper letters, 41 selfloop transitions, 8 changer transitions 0/160 dead transitions. [2021-12-21 15:22:37,278 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 160 transitions, 473 flow [2021-12-21 15:22:37,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 15:22:37,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-21 15:22:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1026 transitions. [2021-12-21 15:22:37,281 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8015625 [2021-12-21 15:22:37,281 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1026 transitions. [2021-12-21 15:22:37,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1026 transitions. [2021-12-21 15:22:37,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:37,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1026 transitions. [2021-12-21 15:22:37,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 128.25) internal successors, (1026), 8 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:37,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 160.0) internal successors, (1440), 9 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:37,288 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 160.0) internal successors, (1440), 9 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:37,288 INFO L186 Difference]: Start difference. First operand has 152 places, 140 transitions, 327 flow. Second operand 8 states and 1026 transitions. [2021-12-21 15:22:37,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 160 transitions, 473 flow [2021-12-21 15:22:37,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 160 transitions, 469 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-12-21 15:22:37,300 INFO L242 Difference]: Finished difference. Result has 150 places, 143 transitions, 359 flow [2021-12-21 15:22:37,301 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=359, PETRI_PLACES=150, PETRI_TRANSITIONS=143} [2021-12-21 15:22:37,302 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 6 predicate places. [2021-12-21 15:22:37,302 INFO L470 AbstractCegarLoop]: Abstraction has has 150 places, 143 transitions, 359 flow [2021-12-21 15:22:37,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 125.42857142857143) internal successors, (878), 7 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:37,303 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:37,304 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:22:37,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 15:22:37,310 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:22:37,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:37,311 INFO L85 PathProgramCache]: Analyzing trace with hash 73956418, now seen corresponding path program 1 times [2021-12-21 15:22:37,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:37,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974446589] [2021-12-21 15:22:37,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:37,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:37,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:37,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974446589] [2021-12-21 15:22:37,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974446589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:22:37,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:22:37,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 15:22:37,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187147153] [2021-12-21 15:22:37,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:22:37,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:22:37,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:37,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:22:37,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:22:37,521 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 160 [2021-12-21 15:22:37,522 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 143 transitions, 359 flow. Second operand has 10 states, 10 states have (on average 104.1) internal successors, (1041), 10 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:37,522 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:37,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 160 [2021-12-21 15:22:37,523 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:38,042 INFO L129 PetriNetUnfolder]: 856/2248 cut-off events. [2021-12-21 15:22:38,042 INFO L130 PetriNetUnfolder]: For 313/335 co-relation queries the response was YES. [2021-12-21 15:22:38,051 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3960 conditions, 2248 events. 856/2248 cut-off events. For 313/335 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17056 event pairs, 565 based on Foata normal form. 21/1945 useless extension candidates. Maximal degree in co-relation 3404. Up to 1089 conditions per place. [2021-12-21 15:22:38,074 INFO L132 encePairwiseOnDemand]: 146/160 looper letters, 65 selfloop transitions, 13 changer transitions 0/172 dead transitions. [2021-12-21 15:22:38,075 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 172 transitions, 583 flow [2021-12-21 15:22:38,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 15:22:38,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-21 15:22:38,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1379 transitions. [2021-12-21 15:22:38,079 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6629807692307692 [2021-12-21 15:22:38,079 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1379 transitions. [2021-12-21 15:22:38,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1379 transitions. [2021-12-21 15:22:38,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:38,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1379 transitions. [2021-12-21 15:22:38,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 106.07692307692308) internal successors, (1379), 13 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:38,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 160.0) internal successors, (2240), 14 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:38,087 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 160.0) internal successors, (2240), 14 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:38,087 INFO L186 Difference]: Start difference. First operand has 150 places, 143 transitions, 359 flow. Second operand 13 states and 1379 transitions. [2021-12-21 15:22:38,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 172 transitions, 583 flow [2021-12-21 15:22:38,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 172 transitions, 573 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-21 15:22:38,092 INFO L242 Difference]: Finished difference. Result has 163 places, 147 transitions, 402 flow [2021-12-21 15:22:38,093 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=402, PETRI_PLACES=163, PETRI_TRANSITIONS=147} [2021-12-21 15:22:38,093 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 19 predicate places. [2021-12-21 15:22:38,094 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 147 transitions, 402 flow [2021-12-21 15:22:38,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 104.1) internal successors, (1041), 10 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:38,094 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:38,094 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:22:38,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 15:22:38,095 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:22:38,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:38,096 INFO L85 PathProgramCache]: Analyzing trace with hash 2069950516, now seen corresponding path program 1 times [2021-12-21 15:22:38,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:38,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564040858] [2021-12-21 15:22:38,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:38,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:38,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:38,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564040858] [2021-12-21 15:22:38,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564040858] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:22:38,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:22:38,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 15:22:38,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869810152] [2021-12-21 15:22:38,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:22:38,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:22:38,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:38,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:22:38,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:22:38,429 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 160 [2021-12-21 15:22:38,430 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 147 transitions, 402 flow. Second operand has 10 states, 10 states have (on average 105.0) internal successors, (1050), 10 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:38,430 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:38,430 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 160 [2021-12-21 15:22:38,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:39,004 INFO L129 PetriNetUnfolder]: 640/1565 cut-off events. [2021-12-21 15:22:39,005 INFO L130 PetriNetUnfolder]: For 402/420 co-relation queries the response was YES. [2021-12-21 15:22:39,010 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3024 conditions, 1565 events. 640/1565 cut-off events. For 402/420 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10378 event pairs, 440 based on Foata normal form. 18/1392 useless extension candidates. Maximal degree in co-relation 2728. Up to 909 conditions per place. [2021-12-21 15:22:39,017 INFO L132 encePairwiseOnDemand]: 148/160 looper letters, 44 selfloop transitions, 6 changer transitions 21/165 dead transitions. [2021-12-21 15:22:39,017 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 165 transitions, 584 flow [2021-12-21 15:22:39,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 15:22:39,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-21 15:22:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1181 transitions. [2021-12-21 15:22:39,021 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6710227272727273 [2021-12-21 15:22:39,021 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1181 transitions. [2021-12-21 15:22:39,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1181 transitions. [2021-12-21 15:22:39,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:39,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1181 transitions. [2021-12-21 15:22:39,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 107.36363636363636) internal successors, (1181), 11 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:39,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:39,027 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:39,028 INFO L186 Difference]: Start difference. First operand has 163 places, 147 transitions, 402 flow. Second operand 11 states and 1181 transitions. [2021-12-21 15:22:39,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 165 transitions, 584 flow [2021-12-21 15:22:39,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 165 transitions, 567 flow, removed 0 selfloop flow, removed 7 redundant places. [2021-12-21 15:22:39,034 INFO L242 Difference]: Finished difference. Result has 168 places, 141 transitions, 363 flow [2021-12-21 15:22:39,035 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=363, PETRI_PLACES=168, PETRI_TRANSITIONS=141} [2021-12-21 15:22:39,036 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 24 predicate places. [2021-12-21 15:22:39,036 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 141 transitions, 363 flow [2021-12-21 15:22:39,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 105.0) internal successors, (1050), 10 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:39,037 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:39,037 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:22:39,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 15:22:39,038 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:22:39,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:39,038 INFO L85 PathProgramCache]: Analyzing trace with hash -40833583, now seen corresponding path program 1 times [2021-12-21 15:22:39,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:39,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113517192] [2021-12-21 15:22:39,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:39,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:22:39,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:39,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113517192] [2021-12-21 15:22:39,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113517192] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:22:39,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204024834] [2021-12-21 15:22:39,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:39,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:39,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:22:39,199 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) [2021-12-21 15:22:39,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 15:22:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:39,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 15:22:39,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:22:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:22:39,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:22:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:22:39,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204024834] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 15:22:39,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 15:22:39,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 18 [2021-12-21 15:22:39,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942978421] [2021-12-21 15:22:39,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:22:39,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 15:22:39,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:39,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 15:22:39,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-12-21 15:22:39,996 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 160 [2021-12-21 15:22:39,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 141 transitions, 363 flow. Second operand has 9 states, 9 states have (on average 117.22222222222223) internal successors, (1055), 9 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:39,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:39,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 160 [2021-12-21 15:22:39,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:40,559 INFO L129 PetriNetUnfolder]: 1394/3136 cut-off events. [2021-12-21 15:22:40,560 INFO L130 PetriNetUnfolder]: For 843/844 co-relation queries the response was YES. [2021-12-21 15:22:40,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6283 conditions, 3136 events. 1394/3136 cut-off events. For 843/844 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 24659 event pairs, 430 based on Foata normal form. 9/3058 useless extension candidates. Maximal degree in co-relation 6186. Up to 619 conditions per place. [2021-12-21 15:22:40,585 INFO L132 encePairwiseOnDemand]: 149/160 looper letters, 72 selfloop transitions, 17 changer transitions 0/192 dead transitions. [2021-12-21 15:22:40,586 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 192 transitions, 682 flow [2021-12-21 15:22:40,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 15:22:40,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-21 15:22:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1343 transitions. [2021-12-21 15:22:40,589 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7630681818181818 [2021-12-21 15:22:40,589 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1343 transitions. [2021-12-21 15:22:40,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1343 transitions. [2021-12-21 15:22:40,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:40,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1343 transitions. [2021-12-21 15:22:40,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 122.0909090909091) internal successors, (1343), 11 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:40,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:40,598 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:40,599 INFO L186 Difference]: Start difference. First operand has 168 places, 141 transitions, 363 flow. Second operand 11 states and 1343 transitions. [2021-12-21 15:22:40,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 192 transitions, 682 flow [2021-12-21 15:22:40,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 192 transitions, 624 flow, removed 23 selfloop flow, removed 14 redundant places. [2021-12-21 15:22:40,607 INFO L242 Difference]: Finished difference. Result has 157 places, 153 transitions, 427 flow [2021-12-21 15:22:40,607 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=427, PETRI_PLACES=157, PETRI_TRANSITIONS=153} [2021-12-21 15:22:40,609 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 13 predicate places. [2021-12-21 15:22:40,610 INFO L470 AbstractCegarLoop]: Abstraction has has 157 places, 153 transitions, 427 flow [2021-12-21 15:22:40,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 117.22222222222223) internal successors, (1055), 9 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:40,611 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:40,611 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:22:40,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 15:22:40,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:40,834 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:22:40,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:40,835 INFO L85 PathProgramCache]: Analyzing trace with hash -434299201, now seen corresponding path program 2 times [2021-12-21 15:22:40,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:40,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002835506] [2021-12-21 15:22:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:40,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:22:40,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:40,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002835506] [2021-12-21 15:22:40,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002835506] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:22:40,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391497459] [2021-12-21 15:22:41,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:22:41,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:41,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:22:41,001 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) [2021-12-21 15:22:41,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 15:22:41,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:22:41,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:22:41,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 15:22:41,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:22:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:22:41,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:22:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:22:41,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391497459] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:22:41,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:22:41,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 17 [2021-12-21 15:22:41,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547251103] [2021-12-21 15:22:41,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:22:41,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 15:22:41,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:41,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 15:22:41,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-21 15:22:41,616 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 160 [2021-12-21 15:22:41,618 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 153 transitions, 427 flow. Second operand has 17 states, 17 states have (on average 113.6470588235294) internal successors, (1932), 17 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:41,618 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:41,619 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 160 [2021-12-21 15:22:41,619 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:43,228 INFO L129 PetriNetUnfolder]: 3980/8113 cut-off events. [2021-12-21 15:22:43,229 INFO L130 PetriNetUnfolder]: For 3000/3053 co-relation queries the response was YES. [2021-12-21 15:22:43,260 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18143 conditions, 8113 events. 3980/8113 cut-off events. For 3000/3053 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 68580 event pairs, 329 based on Foata normal form. 34/7702 useless extension candidates. Maximal degree in co-relation 18048. Up to 745 conditions per place. [2021-12-21 15:22:43,303 INFO L132 encePairwiseOnDemand]: 144/160 looper letters, 219 selfloop transitions, 88 changer transitions 0/406 dead transitions. [2021-12-21 15:22:43,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 406 transitions, 1810 flow [2021-12-21 15:22:43,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 15:22:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-21 15:22:43,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2927 transitions. [2021-12-21 15:22:43,310 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7622395833333333 [2021-12-21 15:22:43,311 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2927 transitions. [2021-12-21 15:22:43,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2927 transitions. [2021-12-21 15:22:43,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:43,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2927 transitions. [2021-12-21 15:22:43,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 121.95833333333333) internal successors, (2927), 24 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:43,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 160.0) internal successors, (4000), 25 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:43,327 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 160.0) internal successors, (4000), 25 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:43,327 INFO L186 Difference]: Start difference. First operand has 157 places, 153 transitions, 427 flow. Second operand 24 states and 2927 transitions. [2021-12-21 15:22:43,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 406 transitions, 1810 flow [2021-12-21 15:22:43,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 406 transitions, 1805 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-21 15:22:43,379 INFO L242 Difference]: Finished difference. Result has 195 places, 234 transitions, 1161 flow [2021-12-21 15:22:43,379 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1161, PETRI_PLACES=195, PETRI_TRANSITIONS=234} [2021-12-21 15:22:43,382 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 51 predicate places. [2021-12-21 15:22:43,382 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 234 transitions, 1161 flow [2021-12-21 15:22:43,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 113.6470588235294) internal successors, (1932), 17 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:43,383 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:43,383 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:22:43,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 15:22:43,597 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,SelfDestructingSolverStorable5 [2021-12-21 15:22:43,598 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:22:43,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:43,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1761054417, now seen corresponding path program 1 times [2021-12-21 15:22:43,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:43,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854748748] [2021-12-21 15:22:43,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:43,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:22:43,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:43,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854748748] [2021-12-21 15:22:43,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854748748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:22:43,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484923527] [2021-12-21 15:22:43,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:43,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:43,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:22:43,676 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) [2021-12-21 15:22:43,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 15:22:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:43,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 15:22:43,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:22:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:22:44,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:22:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:22:44,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484923527] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 15:22:44,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 15:22:44,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2021-12-21 15:22:44,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209939654] [2021-12-21 15:22:44,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:22:44,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:22:44,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:44,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:22:44,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-12-21 15:22:44,316 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 160 [2021-12-21 15:22:44,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 234 transitions, 1161 flow. Second operand has 7 states, 7 states have (on average 125.57142857142857) internal successors, (879), 7 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:44,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:44,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 160 [2021-12-21 15:22:44,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:44,651 INFO L129 PetriNetUnfolder]: 674/2240 cut-off events. [2021-12-21 15:22:44,651 INFO L130 PetriNetUnfolder]: For 7035/7567 co-relation queries the response was YES. [2021-12-21 15:22:44,665 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6166 conditions, 2240 events. 674/2240 cut-off events. For 7035/7567 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18349 event pairs, 110 based on Foata normal form. 129/2266 useless extension candidates. Maximal degree in co-relation 6053. Up to 370 conditions per place. [2021-12-21 15:22:44,676 INFO L132 encePairwiseOnDemand]: 152/160 looper letters, 63 selfloop transitions, 24 changer transitions 0/251 dead transitions. [2021-12-21 15:22:44,676 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 251 transitions, 1459 flow [2021-12-21 15:22:44,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:22:44,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:22:44,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 890 transitions. [2021-12-21 15:22:44,679 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7946428571428571 [2021-12-21 15:22:44,679 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 890 transitions. [2021-12-21 15:22:44,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 890 transitions. [2021-12-21 15:22:44,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:44,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 890 transitions. [2021-12-21 15:22:44,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 127.14285714285714) internal successors, (890), 7 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:44,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 160.0) internal successors, (1280), 8 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:44,684 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 160.0) internal successors, (1280), 8 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:44,684 INFO L186 Difference]: Start difference. First operand has 195 places, 234 transitions, 1161 flow. Second operand 7 states and 890 transitions. [2021-12-21 15:22:44,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 251 transitions, 1459 flow [2021-12-21 15:22:44,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 251 transitions, 1413 flow, removed 7 selfloop flow, removed 8 redundant places. [2021-12-21 15:22:44,710 INFO L242 Difference]: Finished difference. Result has 194 places, 234 transitions, 1171 flow [2021-12-21 15:22:44,710 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1171, PETRI_PLACES=194, PETRI_TRANSITIONS=234} [2021-12-21 15:22:44,711 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 50 predicate places. [2021-12-21 15:22:44,711 INFO L470 AbstractCegarLoop]: Abstraction has has 194 places, 234 transitions, 1171 flow [2021-12-21 15:22:44,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 125.57142857142857) internal successors, (879), 7 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:44,712 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:44,712 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:22:44,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 15:22:44,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:44,935 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:22:44,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:44,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1358578551, now seen corresponding path program 3 times [2021-12-21 15:22:44,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:44,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778615331] [2021-12-21 15:22:44,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:44,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:45,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:45,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778615331] [2021-12-21 15:22:45,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778615331] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:22:45,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547540633] [2021-12-21 15:22:45,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 15:22:45,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:45,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:22:45,037 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) [2021-12-21 15:22:45,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 15:22:45,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-21 15:22:45,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:22:45,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 15:22:45,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:22:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:45,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:22:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:45,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547540633] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:22:45,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:22:45,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2021-12-21 15:22:45,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361626336] [2021-12-21 15:22:45,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:22:45,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 15:22:45,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:45,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 15:22:45,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-12-21 15:22:45,805 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 160 [2021-12-21 15:22:45,807 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 234 transitions, 1171 flow. Second operand has 18 states, 18 states have (on average 116.94444444444444) internal successors, (2105), 18 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:45,807 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:45,807 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 160 [2021-12-21 15:22:45,807 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:47,005 INFO L129 PetriNetUnfolder]: 2825/6173 cut-off events. [2021-12-21 15:22:47,006 INFO L130 PetriNetUnfolder]: For 12942/13506 co-relation queries the response was YES. [2021-12-21 15:22:47,042 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18759 conditions, 6173 events. 2825/6173 cut-off events. For 12942/13506 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 51065 event pairs, 384 based on Foata normal form. 87/6045 useless extension candidates. Maximal degree in co-relation 18646. Up to 928 conditions per place. [2021-12-21 15:22:47,082 INFO L132 encePairwiseOnDemand]: 147/160 looper letters, 133 selfloop transitions, 124 changer transitions 0/377 dead transitions. [2021-12-21 15:22:47,083 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 377 transitions, 2554 flow [2021-12-21 15:22:47,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 15:22:47,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-21 15:22:47,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1819 transitions. [2021-12-21 15:22:47,087 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7579166666666667 [2021-12-21 15:22:47,087 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1819 transitions. [2021-12-21 15:22:47,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1819 transitions. [2021-12-21 15:22:47,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:47,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1819 transitions. [2021-12-21 15:22:47,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 121.26666666666667) internal successors, (1819), 15 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) [2021-12-21 15:22:47,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 160.0) internal successors, (2560), 16 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:47,098 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 160.0) internal successors, (2560), 16 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:47,098 INFO L186 Difference]: Start difference. First operand has 194 places, 234 transitions, 1171 flow. Second operand 15 states and 1819 transitions. [2021-12-21 15:22:47,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 377 transitions, 2554 flow [2021-12-21 15:22:47,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 377 transitions, 2519 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-12-21 15:22:47,166 INFO L242 Difference]: Finished difference. Result has 209 places, 301 transitions, 2112 flow [2021-12-21 15:22:47,167 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2112, PETRI_PLACES=209, PETRI_TRANSITIONS=301} [2021-12-21 15:22:47,168 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 65 predicate places. [2021-12-21 15:22:47,168 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 301 transitions, 2112 flow [2021-12-21 15:22:47,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 116.94444444444444) internal successors, (2105), 18 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:47,169 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:47,169 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:22:47,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 15:22:47,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:47,383 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:22:47,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:47,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1212757809, now seen corresponding path program 4 times [2021-12-21 15:22:47,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:47,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077044748] [2021-12-21 15:22:47,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:47,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:47,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:22:47,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:47,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077044748] [2021-12-21 15:22:47,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077044748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:22:47,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323375700] [2021-12-21 15:22:47,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 15:22:47,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:47,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:22:47,491 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) [2021-12-21 15:22:47,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 15:22:47,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 15:22:47,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:22:47,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 15:22:47,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:22:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:22:47,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:22:48,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:22:48,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323375700] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 15:22:48,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 15:22:48,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 19 [2021-12-21 15:22:48,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249527446] [2021-12-21 15:22:48,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:22:48,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 15:22:48,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:48,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 15:22:48,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-12-21 15:22:48,191 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 160 [2021-12-21 15:22:48,192 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 301 transitions, 2112 flow. Second operand has 9 states, 9 states have (on average 117.22222222222223) internal successors, (1055), 9 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:48,193 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:48,193 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 160 [2021-12-21 15:22:48,193 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:49,198 INFO L129 PetriNetUnfolder]: 3161/7053 cut-off events. [2021-12-21 15:22:49,198 INFO L130 PetriNetUnfolder]: For 24109/24829 co-relation queries the response was YES. [2021-12-21 15:22:49,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23872 conditions, 7053 events. 3161/7053 cut-off events. For 24109/24829 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 60548 event pairs, 522 based on Foata normal form. 224/7064 useless extension candidates. Maximal degree in co-relation 23752. Up to 1539 conditions per place. [2021-12-21 15:22:49,278 INFO L132 encePairwiseOnDemand]: 147/160 looper letters, 129 selfloop transitions, 126 changer transitions 0/375 dead transitions. [2021-12-21 15:22:49,278 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 375 transitions, 3100 flow [2021-12-21 15:22:49,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 15:22:49,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-21 15:22:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1353 transitions. [2021-12-21 15:22:49,282 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.76875 [2021-12-21 15:22:49,282 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1353 transitions. [2021-12-21 15:22:49,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1353 transitions. [2021-12-21 15:22:49,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:49,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1353 transitions. [2021-12-21 15:22:49,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 123.0) internal successors, (1353), 11 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:49,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:49,290 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:49,290 INFO L186 Difference]: Start difference. First operand has 209 places, 301 transitions, 2112 flow. Second operand 11 states and 1353 transitions. [2021-12-21 15:22:49,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 375 transitions, 3100 flow [2021-12-21 15:22:49,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 375 transitions, 3061 flow, removed 15 selfloop flow, removed 5 redundant places. [2021-12-21 15:22:49,438 INFO L242 Difference]: Finished difference. Result has 219 places, 323 transitions, 2806 flow [2021-12-21 15:22:49,439 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=2087, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2806, PETRI_PLACES=219, PETRI_TRANSITIONS=323} [2021-12-21 15:22:49,440 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 75 predicate places. [2021-12-21 15:22:49,440 INFO L470 AbstractCegarLoop]: Abstraction has has 219 places, 323 transitions, 2806 flow [2021-12-21 15:22:49,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 117.22222222222223) internal successors, (1055), 9 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:49,446 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:49,447 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:22:49,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 15:22:49,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:49,660 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:22:49,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:49,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1165057115, now seen corresponding path program 5 times [2021-12-21 15:22:49,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:49,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057288595] [2021-12-21 15:22:49,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:49,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:49,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:49,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057288595] [2021-12-21 15:22:49,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057288595] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:22:49,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091364350] [2021-12-21 15:22:49,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 15:22:49,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:49,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:22:49,765 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) [2021-12-21 15:22:49,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 15:22:49,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:22:49,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:22:49,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 15:22:49,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:22:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:22:50,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:22:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:22:50,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091364350] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:22:50,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:22:50,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 16 [2021-12-21 15:22:50,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554516114] [2021-12-21 15:22:50,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:22:50,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 15:22:50,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:50,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 15:22:50,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-12-21 15:22:50,319 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 160 [2021-12-21 15:22:50,321 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 323 transitions, 2806 flow. Second operand has 16 states, 16 states have (on average 113.8125) internal successors, (1821), 16 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:50,321 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:50,321 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 160 [2021-12-21 15:22:50,322 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:52,536 INFO L129 PetriNetUnfolder]: 5646/11597 cut-off events. [2021-12-21 15:22:52,537 INFO L130 PetriNetUnfolder]: For 61253/61510 co-relation queries the response was YES. [2021-12-21 15:22:52,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43735 conditions, 11597 events. 5646/11597 cut-off events. For 61253/61510 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 101117 event pairs, 708 based on Foata normal form. 61/11458 useless extension candidates. Maximal degree in co-relation 43610. Up to 1166 conditions per place. [2021-12-21 15:22:52,825 INFO L132 encePairwiseOnDemand]: 143/160 looper letters, 233 selfloop transitions, 237 changer transitions 0/569 dead transitions. [2021-12-21 15:22:52,826 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 569 transitions, 5314 flow [2021-12-21 15:22:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 15:22:52,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-21 15:22:52,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2907 transitions. [2021-12-21 15:22:52,833 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.75703125 [2021-12-21 15:22:52,834 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2907 transitions. [2021-12-21 15:22:52,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2907 transitions. [2021-12-21 15:22:52,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:52,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2907 transitions. [2021-12-21 15:22:52,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 121.125) internal successors, (2907), 24 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:52,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 160.0) internal successors, (4000), 25 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:52,850 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 160.0) internal successors, (4000), 25 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:52,850 INFO L186 Difference]: Start difference. First operand has 219 places, 323 transitions, 2806 flow. Second operand 24 states and 2907 transitions. [2021-12-21 15:22:52,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 569 transitions, 5314 flow [2021-12-21 15:22:53,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 569 transitions, 5196 flow, removed 12 selfloop flow, removed 6 redundant places. [2021-12-21 15:22:53,241 INFO L242 Difference]: Finished difference. Result has 248 places, 424 transitions, 4356 flow [2021-12-21 15:22:53,242 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=2728, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4356, PETRI_PLACES=248, PETRI_TRANSITIONS=424} [2021-12-21 15:22:53,243 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 104 predicate places. [2021-12-21 15:22:53,243 INFO L470 AbstractCegarLoop]: Abstraction has has 248 places, 424 transitions, 4356 flow [2021-12-21 15:22:53,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 113.8125) internal successors, (1821), 16 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:53,244 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:53,244 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:22:53,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 15:22:53,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:53,460 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:22:53,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:53,460 INFO L85 PathProgramCache]: Analyzing trace with hash -186314357, now seen corresponding path program 6 times [2021-12-21 15:22:53,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:53,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163857844] [2021-12-21 15:22:53,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:53,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:22:53,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:53,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163857844] [2021-12-21 15:22:53,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163857844] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:22:53,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907806811] [2021-12-21 15:22:53,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 15:22:53,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:53,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:22:53,567 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) [2021-12-21 15:22:53,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 15:22:53,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-21 15:22:53,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:22:53,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 15:22:53,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:22:53,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:22:53,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:22:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:22:54,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907806811] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 15:22:54,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 15:22:54,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2021-12-21 15:22:54,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854057548] [2021-12-21 15:22:54,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:22:54,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 15:22:54,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:54,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 15:22:54,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-12-21 15:22:54,205 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 160 [2021-12-21 15:22:54,206 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 424 transitions, 4356 flow. Second operand has 9 states, 9 states have (on average 117.22222222222223) internal successors, (1055), 9 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:54,206 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:54,206 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 160 [2021-12-21 15:22:54,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:55,364 INFO L129 PetriNetUnfolder]: 3171/7018 cut-off events. [2021-12-21 15:22:55,364 INFO L130 PetriNetUnfolder]: For 42577/43096 co-relation queries the response was YES. [2021-12-21 15:22:55,417 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28375 conditions, 7018 events. 3171/7018 cut-off events. For 42577/43096 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 60399 event pairs, 409 based on Foata normal form. 69/6885 useless extension candidates. Maximal degree in co-relation 28238. Up to 1998 conditions per place. [2021-12-21 15:22:55,460 INFO L132 encePairwiseOnDemand]: 148/160 looper letters, 124 selfloop transitions, 163 changer transitions 0/453 dead transitions. [2021-12-21 15:22:55,460 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 453 transitions, 5093 flow [2021-12-21 15:22:55,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 15:22:55,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-21 15:22:55,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1220 transitions. [2021-12-21 15:22:55,465 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7625 [2021-12-21 15:22:55,466 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1220 transitions. [2021-12-21 15:22:55,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1220 transitions. [2021-12-21 15:22:55,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:55,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1220 transitions. [2021-12-21 15:22:55,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 122.0) internal successors, (1220), 10 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:55,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 160.0) internal successors, (1760), 11 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:55,474 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 160.0) internal successors, (1760), 11 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:55,475 INFO L186 Difference]: Start difference. First operand has 248 places, 424 transitions, 4356 flow. Second operand 10 states and 1220 transitions. [2021-12-21 15:22:55,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 453 transitions, 5093 flow [2021-12-21 15:22:55,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 453 transitions, 4966 flow, removed 38 selfloop flow, removed 6 redundant places. [2021-12-21 15:22:55,876 INFO L242 Difference]: Finished difference. Result has 254 places, 427 transitions, 4845 flow [2021-12-21 15:22:55,876 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=4237, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4845, PETRI_PLACES=254, PETRI_TRANSITIONS=427} [2021-12-21 15:22:55,877 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 110 predicate places. [2021-12-21 15:22:55,877 INFO L470 AbstractCegarLoop]: Abstraction has has 254 places, 427 transitions, 4845 flow [2021-12-21 15:22:55,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 117.22222222222223) internal successors, (1055), 9 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:55,877 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:55,877 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:22:55,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 15:22:56,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:56,078 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:22:56,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:56,079 INFO L85 PathProgramCache]: Analyzing trace with hash 2057679709, now seen corresponding path program 1 times [2021-12-21 15:22:56,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:56,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762499692] [2021-12-21 15:22:56,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:56,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:57,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:57,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762499692] [2021-12-21 15:22:57,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762499692] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:22:57,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988112636] [2021-12-21 15:22:57,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:57,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:57,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:22:57,236 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) [2021-12-21 15:22:57,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 15:22:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:57,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-21 15:22:57,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:22:58,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:22:58,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-21 15:22:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:59,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:22:59,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:22:59,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29