./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.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 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 13:14:10,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 13:14:10,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 13:14:10,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 13:14:10,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 13:14:10,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 13:14:10,846 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 13:14:10,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 13:14:10,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 13:14:10,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 13:14:10,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 13:14:10,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 13:14:10,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 13:14:10,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 13:14:10,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 13:14:10,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 13:14:10,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 13:14:10,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 13:14:10,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 13:14:10,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 13:14:10,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 13:14:10,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 13:14:10,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 13:14:10,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 13:14:10,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 13:14:10,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 13:14:10,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 13:14:10,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 13:14:10,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 13:14:10,889 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 13:14:10,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 13:14:10,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 13:14:10,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 13:14:10,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 13:14:10,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 13:14:10,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 13:14:10,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 13:14:10,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 13:14:10,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 13:14:10,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 13:14:10,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 13:14:10,916 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 13:14:10,952 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 13:14:10,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 13:14:10,953 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 13:14:10,953 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 13:14:10,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 13:14:10,954 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 13:14:10,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 13:14:10,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 13:14:10,955 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 13:14:10,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 13:14:10,956 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 13:14:10,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 13:14:10,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 13:14:10,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 13:14:10,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 13:14:10,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 13:14:10,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 13:14:10,958 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 13:14:10,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 13:14:10,958 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 13:14:10,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 13:14:10,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 13:14:10,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 13:14:10,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 13:14:10,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:14:10,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 13:14:10,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 13:14:10,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 13:14:10,960 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 13:14:10,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 13:14:10,960 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 13:14:10,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 13:14:10,961 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 13:14:10,961 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 13:14:10,961 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 13:14:10,961 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 13:14:11,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 13:14:11,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 13:14:11,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 13:14:11,257 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 13:14:11,257 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 13:14:11,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-09-01 13:14:12,369 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 13:14:12,589 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 13:14:12,589 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-09-01 13:14:12,594 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32401cdc1/277b95f8a032401f856c4b1a4200783f/FLAG46dfde62b [2023-09-01 13:14:12,607 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32401cdc1/277b95f8a032401f856c4b1a4200783f [2023-09-01 13:14:12,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 13:14:12,610 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 13:14:12,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 13:14:12,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 13:14:12,616 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 13:14:12,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:14:12" (1/1) ... [2023-09-01 13:14:12,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76a17646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:14:12, skipping insertion in model container [2023-09-01 13:14:12,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:14:12" (1/1) ... [2023-09-01 13:14:12,624 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 13:14:12,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 13:14:12,792 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2023-09-01 13:14:12,818 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:14:12,827 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 13:14:12,851 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2023-09-01 13:14:12,855 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:14:12,868 INFO L208 MainTranslator]: Completed translation [2023-09-01 13:14:12,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:14:12 WrapperNode [2023-09-01 13:14:12,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 13:14:12,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 13:14:12,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 13:14:12,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 13:14:12,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:14:12" (1/1) ... [2023-09-01 13:14:12,894 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:14:12" (1/1) ... [2023-09-01 13:14:12,936 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 275 [2023-09-01 13:14:12,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 13:14:12,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 13:14:12,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 13:14:12,939 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 13:14:12,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:14:12" (1/1) ... [2023-09-01 13:14:12,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:14:12" (1/1) ... [2023-09-01 13:14:12,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:14:12" (1/1) ... [2023-09-01 13:14:12,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:14:12" (1/1) ... [2023-09-01 13:14:12,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:14:12" (1/1) ... [2023-09-01 13:14:12,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:14:12" (1/1) ... [2023-09-01 13:14:12,991 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:14:12" (1/1) ... [2023-09-01 13:14:12,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:14:12" (1/1) ... [2023-09-01 13:14:13,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 13:14:13,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 13:14:13,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 13:14:13,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 13:14:13,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:14:12" (1/1) ... [2023-09-01 13:14:13,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:14:13,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:14:13,033 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) [2023-09-01 13:14:13,043 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 [2023-09-01 13:14:13,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 13:14:13,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 13:14:13,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 13:14:13,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 13:14:13,070 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 13:14:13,070 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 13:14:13,071 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 13:14:13,071 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 13:14:13,071 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 13:14:13,071 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 13:14:13,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 13:14:13,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 13:14:13,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 13:14:13,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 13:14:13,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 13:14:13,073 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 13:14:13,227 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 13:14:13,246 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 13:14:13,600 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 13:14:13,610 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 13:14:13,610 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 13:14:13,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:14:13 BoogieIcfgContainer [2023-09-01 13:14:13,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 13:14:13,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 13:14:13,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 13:14:13,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 13:14:13,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:14:12" (1/3) ... [2023-09-01 13:14:13,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4666fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:14:13, skipping insertion in model container [2023-09-01 13:14:13,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:14:12" (2/3) ... [2023-09-01 13:14:13,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4666fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:14:13, skipping insertion in model container [2023-09-01 13:14:13,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:14:13" (3/3) ... [2023-09-01 13:14:13,635 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2023-09-01 13:14:13,641 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 13:14:13,653 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 13:14:13,666 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 13:14:13,666 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 13:14:13,827 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 13:14:13,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 302 places, 321 transitions, 666 flow [2023-09-01 13:14:13,985 INFO L130 PetriNetUnfolder]: 29/318 cut-off events. [2023-09-01 13:14:13,985 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:14:14,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 318 events. 29/318 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 438 event pairs, 0 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 213. Up to 2 conditions per place. [2023-09-01 13:14:14,002 INFO L82 GeneralOperation]: Start removeDead. Operand has 302 places, 321 transitions, 666 flow [2023-09-01 13:14:14,015 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 308 transitions, 634 flow [2023-09-01 13:14:14,019 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 13:14:14,030 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 289 places, 308 transitions, 634 flow [2023-09-01 13:14:14,034 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 289 places, 308 transitions, 634 flow [2023-09-01 13:14:14,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 308 transitions, 634 flow [2023-09-01 13:14:14,132 INFO L130 PetriNetUnfolder]: 29/308 cut-off events. [2023-09-01 13:14:14,132 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:14:14,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 308 events. 29/308 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 431 event pairs, 0 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 213. Up to 2 conditions per place. [2023-09-01 13:14:14,144 INFO L119 LiptonReduction]: Number of co-enabled transitions 12810 [2023-09-01 13:14:22,320 INFO L134 LiptonReduction]: Checked pairs total: 12315 [2023-09-01 13:14:22,320 INFO L136 LiptonReduction]: Total number of compositions: 361 [2023-09-01 13:14:22,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 13:14:22,336 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2f1b62e8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 13:14:22,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 13:14:22,343 INFO L130 PetriNetUnfolder]: 6/27 cut-off events. [2023-09-01 13:14:22,343 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:14:22,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:14:22,344 INFO L208 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] [2023-09-01 13:14:22,344 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:14:22,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:14:22,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1610439478, now seen corresponding path program 1 times [2023-09-01 13:14:22,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:14:22,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106608232] [2023-09-01 13:14:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:14:22,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:14:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:14:23,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:14:23,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106608232] [2023-09-01 13:14:23,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106608232] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:14:23,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:14:23,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 13:14:23,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114636684] [2023-09-01 13:14:23,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:14:23,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:14:23,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:14:23,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:14:23,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:14:23,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 682 [2023-09-01 13:14:23,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 281.75) internal successors, (1127), 4 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:23,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:14:23,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 682 [2023-09-01 13:14:23,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:14:23,933 INFO L130 PetriNetUnfolder]: 445/647 cut-off events. [2023-09-01 13:14:23,933 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2023-09-01 13:14:23,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1360 conditions, 647 events. 445/647 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2249 event pairs, 76 based on Foata normal form. 2/399 useless extension candidates. Maximal degree in co-relation 803. Up to 465 conditions per place. [2023-09-01 13:14:23,937 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 50 selfloop transitions, 12 changer transitions 2/67 dead transitions. [2023-09-01 13:14:23,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 67 transitions, 313 flow [2023-09-01 13:14:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:14:23,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:14:23,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1174 transitions. [2023-09-01 13:14:23,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4303519061583578 [2023-09-01 13:14:23,956 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1174 transitions. [2023-09-01 13:14:23,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1174 transitions. [2023-09-01 13:14:23,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:14:23,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1174 transitions. [2023-09-01 13:14:23,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 293.5) internal successors, (1174), 4 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:23,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 682.0) internal successors, (3410), 5 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:23,978 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 682.0) internal successors, (3410), 5 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:23,979 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 4 states and 1174 transitions. [2023-09-01 13:14:23,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 67 transitions, 313 flow [2023-09-01 13:14:23,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 67 transitions, 279 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 13:14:23,986 INFO L231 Difference]: Finished difference. Result has 31 places, 39 transitions, 145 flow [2023-09-01 13:14:23,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=31, PETRI_TRANSITIONS=39} [2023-09-01 13:14:23,991 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-09-01 13:14:23,992 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 39 transitions, 145 flow [2023-09-01 13:14:23,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 281.75) internal successors, (1127), 4 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:23,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:14:23,993 INFO L208 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] [2023-09-01 13:14:23,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 13:14:23,994 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:14:23,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:14:23,994 INFO L85 PathProgramCache]: Analyzing trace with hash -713284412, now seen corresponding path program 1 times [2023-09-01 13:14:23,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:14:23,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537591366] [2023-09-01 13:14:23,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:14:23,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:14:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:14:24,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:14:24,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537591366] [2023-09-01 13:14:24,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537591366] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:14:24,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:14:24,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:14:24,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990090405] [2023-09-01 13:14:24,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:14:24,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:14:24,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:14:24,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:14:24,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:14:24,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 682 [2023-09-01 13:14:24,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 39 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 278.2) internal successors, (1391), 5 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:24,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:14:24,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 682 [2023-09-01 13:14:24,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:14:24,402 INFO L130 PetriNetUnfolder]: 719/1094 cut-off events. [2023-09-01 13:14:24,402 INFO L131 PetriNetUnfolder]: For 314/314 co-relation queries the response was YES. [2023-09-01 13:14:24,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2709 conditions, 1094 events. 719/1094 cut-off events. For 314/314 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4526 event pairs, 299 based on Foata normal form. 48/1130 useless extension candidates. Maximal degree in co-relation 1204. Up to 480 conditions per place. [2023-09-01 13:14:24,408 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 67 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2023-09-01 13:14:24,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 79 transitions, 432 flow [2023-09-01 13:14:24,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:14:24,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:14:24,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1434 transitions. [2023-09-01 13:14:24,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42052785923753666 [2023-09-01 13:14:24,414 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1434 transitions. [2023-09-01 13:14:24,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1434 transitions. [2023-09-01 13:14:24,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:14:24,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1434 transitions. [2023-09-01 13:14:24,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 286.8) internal successors, (1434), 5 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:24,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:24,426 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:24,426 INFO L175 Difference]: Start difference. First operand has 31 places, 39 transitions, 145 flow. Second operand 5 states and 1434 transitions. [2023-09-01 13:14:24,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 79 transitions, 432 flow [2023-09-01 13:14:24,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 79 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 13:14:24,429 INFO L231 Difference]: Finished difference. Result has 39 places, 44 transitions, 222 flow [2023-09-01 13:14:24,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=222, PETRI_PLACES=39, PETRI_TRANSITIONS=44} [2023-09-01 13:14:24,441 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2023-09-01 13:14:24,441 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 44 transitions, 222 flow [2023-09-01 13:14:24,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.2) internal successors, (1391), 5 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:24,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:14:24,442 INFO L208 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] [2023-09-01 13:14:24,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 13:14:24,443 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:14:24,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:14:24,444 INFO L85 PathProgramCache]: Analyzing trace with hash -774282216, now seen corresponding path program 1 times [2023-09-01 13:14:24,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:14:24,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797395337] [2023-09-01 13:14:24,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:14:24,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:14:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:14:24,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:14:24,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797395337] [2023-09-01 13:14:24,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797395337] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:14:24,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:14:24,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:14:24,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998929015] [2023-09-01 13:14:24,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:14:24,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:14:24,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:14:24,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:14:24,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:14:24,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 682 [2023-09-01 13:14:24,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 44 transitions, 222 flow. Second operand has 5 states, 5 states have (on average 278.2) internal successors, (1391), 5 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:24,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:14:24,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 682 [2023-09-01 13:14:24,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:14:24,879 INFO L130 PetriNetUnfolder]: 569/906 cut-off events. [2023-09-01 13:14:24,879 INFO L131 PetriNetUnfolder]: For 354/384 co-relation queries the response was YES. [2023-09-01 13:14:24,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2279 conditions, 906 events. 569/906 cut-off events. For 354/384 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3922 event pairs, 244 based on Foata normal form. 74/970 useless extension candidates. Maximal degree in co-relation 1290. Up to 490 conditions per place. [2023-09-01 13:14:24,884 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 61 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2023-09-01 13:14:24,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 74 transitions, 452 flow [2023-09-01 13:14:24,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:14:24,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:14:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1432 transitions. [2023-09-01 13:14:24,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.419941348973607 [2023-09-01 13:14:24,889 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1432 transitions. [2023-09-01 13:14:24,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1432 transitions. [2023-09-01 13:14:24,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:14:24,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1432 transitions. [2023-09-01 13:14:24,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 286.4) internal successors, (1432), 5 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:24,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:24,900 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:24,901 INFO L175 Difference]: Start difference. First operand has 39 places, 44 transitions, 222 flow. Second operand 5 states and 1432 transitions. [2023-09-01 13:14:24,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 74 transitions, 452 flow [2023-09-01 13:14:24,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 74 transitions, 448 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-09-01 13:14:24,904 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 246 flow [2023-09-01 13:14:24,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=246, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2023-09-01 13:14:24,905 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 13 predicate places. [2023-09-01 13:14:24,905 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 246 flow [2023-09-01 13:14:24,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.2) internal successors, (1391), 5 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:24,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:14:24,907 INFO L208 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] [2023-09-01 13:14:24,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 13:14:24,907 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:14:24,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:14:24,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1829236200, now seen corresponding path program 1 times [2023-09-01 13:14:24,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:14:24,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321209490] [2023-09-01 13:14:24,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:14:24,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:14:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:14:25,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:14:25,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321209490] [2023-09-01 13:14:25,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321209490] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:14:25,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:14:25,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:14:25,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575050500] [2023-09-01 13:14:25,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:14:25,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:14:25,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:14:25,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:14:25,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:14:25,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 682 [2023-09-01 13:14:25,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 278.2) internal successors, (1391), 5 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:25,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:14:25,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 682 [2023-09-01 13:14:25,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:14:25,290 INFO L130 PetriNetUnfolder]: 481/766 cut-off events. [2023-09-01 13:14:25,291 INFO L131 PetriNetUnfolder]: For 435/471 co-relation queries the response was YES. [2023-09-01 13:14:25,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 766 events. 481/766 cut-off events. For 435/471 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3254 event pairs, 218 based on Foata normal form. 64/828 useless extension candidates. Maximal degree in co-relation 1427. Up to 518 conditions per place. [2023-09-01 13:14:25,296 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 26 selfloop transitions, 6 changer transitions 34/68 dead transitions. [2023-09-01 13:14:25,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 68 transitions, 433 flow [2023-09-01 13:14:25,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:14:25,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:14:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1429 transitions. [2023-09-01 13:14:25,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4190615835777126 [2023-09-01 13:14:25,300 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1429 transitions. [2023-09-01 13:14:25,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1429 transitions. [2023-09-01 13:14:25,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:14:25,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1429 transitions. [2023-09-01 13:14:25,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 285.8) internal successors, (1429), 5 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:25,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:25,316 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:25,316 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 246 flow. Second operand 5 states and 1429 transitions. [2023-09-01 13:14:25,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 68 transitions, 433 flow [2023-09-01 13:14:25,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 68 transitions, 414 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 13:14:25,322 INFO L231 Difference]: Finished difference. Result has 49 places, 34 transitions, 172 flow [2023-09-01 13:14:25,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=49, PETRI_TRANSITIONS=34} [2023-09-01 13:14:25,323 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2023-09-01 13:14:25,323 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 34 transitions, 172 flow [2023-09-01 13:14:25,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.2) internal successors, (1391), 5 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:25,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:14:25,325 INFO L208 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] [2023-09-01 13:14:25,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 13:14:25,326 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:14:25,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:14:25,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1395831978, now seen corresponding path program 1 times [2023-09-01 13:14:25,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:14:25,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586933562] [2023-09-01 13:14:25,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:14:25,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:14:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:25,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:25,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:14:25,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586933562] [2023-09-01 13:14:25,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586933562] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:14:25,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110898681] [2023-09-01 13:14:25,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:14:25,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:14:25,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:14:25,453 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) [2023-09-01 13:14:25,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 13:14:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:25,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:14:25,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:14:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:25,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:14:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:25,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110898681] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:14:25,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:14:25,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-09-01 13:14:25,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133959501] [2023-09-01 13:14:25,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:14:25,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:14:25,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:14:25,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:14:25,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-09-01 13:14:25,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 682 [2023-09-01 13:14:25,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 34 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 271.8) internal successors, (1359), 5 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:25,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:14:25,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 682 [2023-09-01 13:14:25,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:14:25,969 INFO L130 PetriNetUnfolder]: 378/548 cut-off events. [2023-09-01 13:14:25,970 INFO L131 PetriNetUnfolder]: For 253/253 co-relation queries the response was YES. [2023-09-01 13:14:25,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1497 conditions, 548 events. 378/548 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1841 event pairs, 96 based on Foata normal form. 42/576 useless extension candidates. Maximal degree in co-relation 1436. Up to 393 conditions per place. [2023-09-01 13:14:25,973 INFO L137 encePairwiseOnDemand]: 677/682 looper letters, 39 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-09-01 13:14:25,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 302 flow [2023-09-01 13:14:25,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:14:25,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:14:25,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1373 transitions. [2023-09-01 13:14:25,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4026392961876833 [2023-09-01 13:14:25,978 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1373 transitions. [2023-09-01 13:14:25,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1373 transitions. [2023-09-01 13:14:25,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:14:25,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1373 transitions. [2023-09-01 13:14:25,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 274.6) internal successors, (1373), 5 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:25,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:25,989 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:25,989 INFO L175 Difference]: Start difference. First operand has 49 places, 34 transitions, 172 flow. Second operand 5 states and 1373 transitions. [2023-09-01 13:14:25,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 302 flow [2023-09-01 13:14:25,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 242 flow, removed 10 selfloop flow, removed 12 redundant places. [2023-09-01 13:14:25,991 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 139 flow [2023-09-01 13:14:25,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=139, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-09-01 13:14:25,995 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-09-01 13:14:25,995 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 139 flow [2023-09-01 13:14:25,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 271.8) internal successors, (1359), 5 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:25,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:14:25,996 INFO L208 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] [2023-09-01 13:14:26,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 13:14:26,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:14:26,202 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:14:26,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:14:26,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2005609756, now seen corresponding path program 1 times [2023-09-01 13:14:26,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:14:26,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312958261] [2023-09-01 13:14:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:14:26,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:14:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:26,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:14:26,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312958261] [2023-09-01 13:14:26,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312958261] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:14:26,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547385564] [2023-09-01 13:14:26,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:14:26,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:14:26,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:14:26,368 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) [2023-09-01 13:14:26,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 13:14:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:26,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:14:26,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:14:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:26,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:14:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:26,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547385564] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:14:26,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:14:26,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-09-01 13:14:26,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962261481] [2023-09-01 13:14:26,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:14:26,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:14:26,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:14:26,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:14:26,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 13:14:26,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 682 [2023-09-01 13:14:26,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 271.8) internal successors, (1359), 5 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:26,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:14:26,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 682 [2023-09-01 13:14:26,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:14:26,771 INFO L130 PetriNetUnfolder]: 297/441 cut-off events. [2023-09-01 13:14:26,771 INFO L131 PetriNetUnfolder]: For 322/384 co-relation queries the response was YES. [2023-09-01 13:14:26,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1254 conditions, 441 events. 297/441 cut-off events. For 322/384 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1418 event pairs, 107 based on Foata normal form. 90/512 useless extension candidates. Maximal degree in co-relation 1212. Up to 337 conditions per place. [2023-09-01 13:14:26,774 INFO L137 encePairwiseOnDemand]: 677/682 looper letters, 41 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-09-01 13:14:26,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 48 transitions, 281 flow [2023-09-01 13:14:26,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:14:26,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:14:26,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1373 transitions. [2023-09-01 13:14:26,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4026392961876833 [2023-09-01 13:14:26,781 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1373 transitions. [2023-09-01 13:14:26,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1373 transitions. [2023-09-01 13:14:26,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:14:26,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1373 transitions. [2023-09-01 13:14:26,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 274.6) internal successors, (1373), 5 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:26,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:26,790 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:26,791 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 139 flow. Second operand 5 states and 1373 transitions. [2023-09-01 13:14:26,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 48 transitions, 281 flow [2023-09-01 13:14:26,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 48 transitions, 264 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-09-01 13:14:26,793 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 149 flow [2023-09-01 13:14:26,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-09-01 13:14:26,796 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2023-09-01 13:14:26,796 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 149 flow [2023-09-01 13:14:26,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 271.8) internal successors, (1359), 5 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:26,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:14:26,797 INFO L208 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] [2023-09-01 13:14:26,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 13:14:27,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-09-01 13:14:27,004 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:14:27,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:14:27,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1026556102, now seen corresponding path program 1 times [2023-09-01 13:14:27,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:14:27,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912004214] [2023-09-01 13:14:27,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:14:27,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:14:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:27,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:14:27,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912004214] [2023-09-01 13:14:27,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912004214] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:14:27,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924352862] [2023-09-01 13:14:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:14:27,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:14:27,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:14:27,166 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) [2023-09-01 13:14:27,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 13:14:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:27,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:14:27,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:14:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:27,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:14:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:27,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924352862] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:14:27,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:14:27,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-09-01 13:14:27,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537829439] [2023-09-01 13:14:27,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:14:27,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:14:27,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:14:27,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:14:27,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 13:14:27,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 682 [2023-09-01 13:14:27,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:27,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:14:27,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 682 [2023-09-01 13:14:27,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:14:27,607 INFO L130 PetriNetUnfolder]: 282/422 cut-off events. [2023-09-01 13:14:27,607 INFO L131 PetriNetUnfolder]: For 431/551 co-relation queries the response was YES. [2023-09-01 13:14:27,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1279 conditions, 422 events. 282/422 cut-off events. For 431/551 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1260 event pairs, 114 based on Foata normal form. 146/567 useless extension candidates. Maximal degree in co-relation 1236. Up to 333 conditions per place. [2023-09-01 13:14:27,610 INFO L137 encePairwiseOnDemand]: 677/682 looper letters, 43 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-09-01 13:14:27,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 303 flow [2023-09-01 13:14:27,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:14:27,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:14:27,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1373 transitions. [2023-09-01 13:14:27,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4026392961876833 [2023-09-01 13:14:27,615 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1373 transitions. [2023-09-01 13:14:27,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1373 transitions. [2023-09-01 13:14:27,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:14:27,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1373 transitions. [2023-09-01 13:14:27,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 274.6) internal successors, (1373), 5 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:27,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:27,624 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:27,625 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 149 flow. Second operand 5 states and 1373 transitions. [2023-09-01 13:14:27,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 303 flow [2023-09-01 13:14:27,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 286 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-09-01 13:14:27,627 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 159 flow [2023-09-01 13:14:27,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-09-01 13:14:27,628 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 9 predicate places. [2023-09-01 13:14:27,628 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 159 flow [2023-09-01 13:14:27,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:27,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:14:27,629 INFO L208 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] [2023-09-01 13:14:27,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 13:14:27,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:14:27,835 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:14:27,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:14:27,835 INFO L85 PathProgramCache]: Analyzing trace with hash 334891270, now seen corresponding path program 1 times [2023-09-01 13:14:27,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:14:27,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30711111] [2023-09-01 13:14:27,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:14:27,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:14:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:29,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:14:29,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30711111] [2023-09-01 13:14:29,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30711111] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:14:29,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744201183] [2023-09-01 13:14:29,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:14:29,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:14:29,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:14:29,232 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) [2023-09-01 13:14:29,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 13:14:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:29,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 87 conjunts are in the unsatisfiable core [2023-09-01 13:14:29,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:14:29,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-09-01 13:14:29,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:14:29,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:14:29,927 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 13:14:29,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2023-09-01 13:14:30,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:14:30,055 INFO L350 Elim1Store]: Elim1 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 20 [2023-09-01 13:14:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:30,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:14:30,214 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_347 (Array Int Int))) (<= .cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse1 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse1 c_~A~0.base) c_~A~0.offset))))) (forall ((v_ArrVal_347 (Array Int Int))) (<= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset))) .cse0)))) is different from false [2023-09-01 13:14:30,234 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~asum~0 c_~bsum~0 (select (select |c_#memory_int| c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~B~0.offset))))) (and (forall ((v_ArrVal_347 (Array Int Int))) (<= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse0 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset))) .cse1)) (forall ((v_ArrVal_347 (Array Int Int))) (<= .cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset))))))) is different from false [2023-09-01 13:14:30,246 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0 (select (select |c_#memory_int| c_~B~0.base) c_~B~0.offset)))) (and (forall ((v_ArrVal_347 (Array Int Int))) (<= .cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse1 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse1 c_~A~0.base) c_~A~0.offset))))) (forall ((v_ArrVal_347 (Array Int Int))) (<= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset))) .cse0)))) is different from false [2023-09-01 13:14:30,265 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_347 (Array Int Int)) (v_ArrVal_346 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_346))) (<= (+ c_~asum~0 c_~bsum~0 (select (select .cse0 c_~B~0.base) c_~B~0.offset)) (let ((.cse1 (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse1 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse1 c_~A~0.base) c_~A~0.offset)))))) (forall ((v_ArrVal_347 (Array Int Int)) (v_ArrVal_346 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_346))) (<= (let ((.cse2 (store .cse3 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset))) (+ c_~asum~0 c_~bsum~0 (select (select .cse3 c_~B~0.base) c_~B~0.offset)))))) is different from false [2023-09-01 13:14:30,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:14:30,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2166 treesize of output 1496 [2023-09-01 13:14:30,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:14:30,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 342 treesize of output 318 [2023-09-01 13:14:30,383 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:14:30,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 310 treesize of output 302 [2023-09-01 13:14:30,875 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:14:30,876 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:14:30,877 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:14:30,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 60 [2023-09-01 13:14:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-09-01 13:14:31,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744201183] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:14:31,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:14:31,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2023-09-01 13:14:31,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159272682] [2023-09-01 13:14:31,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:14:31,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 13:14:31,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:14:31,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 13:14:31,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=609, Unknown=4, NotChecked=212, Total=930 [2023-09-01 13:14:31,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 682 [2023-09-01 13:14:31,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 159 flow. Second operand has 31 states, 31 states have (on average 225.19354838709677) internal successors, (6981), 31 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:31,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:14:31,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 682 [2023-09-01 13:14:31,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:14:34,765 INFO L130 PetriNetUnfolder]: 888/1296 cut-off events. [2023-09-01 13:14:34,765 INFO L131 PetriNetUnfolder]: For 1157/1157 co-relation queries the response was YES. [2023-09-01 13:14:34,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4152 conditions, 1296 events. 888/1296 cut-off events. For 1157/1157 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4790 event pairs, 37 based on Foata normal form. 1/1297 useless extension candidates. Maximal degree in co-relation 4108. Up to 805 conditions per place. [2023-09-01 13:14:34,773 INFO L137 encePairwiseOnDemand]: 665/682 looper letters, 101 selfloop transitions, 52 changer transitions 1/154 dead transitions. [2023-09-01 13:14:34,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 154 transitions, 903 flow [2023-09-01 13:14:34,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 13:14:34,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 13:14:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3494 transitions. [2023-09-01 13:14:34,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.341544477028348 [2023-09-01 13:14:34,786 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3494 transitions. [2023-09-01 13:14:34,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3494 transitions. [2023-09-01 13:14:34,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:14:34,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3494 transitions. [2023-09-01 13:14:34,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 232.93333333333334) internal successors, (3494), 15 states have internal predecessors, (3494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:34,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 682.0) internal successors, (10912), 16 states have internal predecessors, (10912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:34,822 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 682.0) internal successors, (10912), 16 states have internal predecessors, (10912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:34,823 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 159 flow. Second operand 15 states and 3494 transitions. [2023-09-01 13:14:34,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 154 transitions, 903 flow [2023-09-01 13:14:34,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 154 transitions, 860 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-09-01 13:14:34,829 INFO L231 Difference]: Finished difference. Result has 59 places, 83 transitions, 551 flow [2023-09-01 13:14:34,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=551, PETRI_PLACES=59, PETRI_TRANSITIONS=83} [2023-09-01 13:14:34,831 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 27 predicate places. [2023-09-01 13:14:34,831 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 83 transitions, 551 flow [2023-09-01 13:14:34,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 225.19354838709677) internal successors, (6981), 31 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:34,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:14:34,833 INFO L208 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] [2023-09-01 13:14:34,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 13:14:35,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:14:35,039 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:14:35,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:14:35,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1866592914, now seen corresponding path program 2 times [2023-09-01 13:14:35,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:14:35,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748304692] [2023-09-01 13:14:35,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:14:35,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:14:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:36,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:14:36,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748304692] [2023-09-01 13:14:36,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748304692] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:14:36,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930854144] [2023-09-01 13:14:36,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:14:36,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:14:36,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:14:36,041 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) [2023-09-01 13:14:36,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 13:14:36,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:14:36,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:14:36,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-09-01 13:14:36,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:14:36,543 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:14:36,543 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 23 [2023-09-01 13:14:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:36,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:14:36,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:14:36,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95 [2023-09-01 13:14:37,043 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-09-01 13:14:37,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2023-09-01 13:14:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:37,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930854144] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:14:37,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:14:37,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 14 [2023-09-01 13:14:37,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518616964] [2023-09-01 13:14:37,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:14:37,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 13:14:37,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:14:37,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 13:14:37,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-09-01 13:14:38,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-09-01 13:14:38,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 83 transitions, 551 flow. Second operand has 16 states, 16 states have (on average 265.1875) internal successors, (4243), 16 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:38,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:14:38,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-09-01 13:14:38,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:14:38,763 INFO L130 PetriNetUnfolder]: 1007/1470 cut-off events. [2023-09-01 13:14:38,764 INFO L131 PetriNetUnfolder]: For 3372/3372 co-relation queries the response was YES. [2023-09-01 13:14:38,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6549 conditions, 1470 events. 1007/1470 cut-off events. For 3372/3372 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5391 event pairs, 216 based on Foata normal form. 1/1471 useless extension candidates. Maximal degree in co-relation 6497. Up to 1298 conditions per place. [2023-09-01 13:14:38,774 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 108 selfloop transitions, 29 changer transitions 1/138 dead transitions. [2023-09-01 13:14:38,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 138 transitions, 1171 flow [2023-09-01 13:14:38,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:14:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:14:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2443 transitions. [2023-09-01 13:14:38,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39801238188334964 [2023-09-01 13:14:38,781 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2443 transitions. [2023-09-01 13:14:38,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2443 transitions. [2023-09-01 13:14:38,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:14:38,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2443 transitions. [2023-09-01 13:14:38,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 271.44444444444446) internal successors, (2443), 9 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:38,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:38,794 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:38,794 INFO L175 Difference]: Start difference. First operand has 59 places, 83 transitions, 551 flow. Second operand 9 states and 2443 transitions. [2023-09-01 13:14:38,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 138 transitions, 1171 flow [2023-09-01 13:14:38,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 138 transitions, 1099 flow, removed 34 selfloop flow, removed 2 redundant places. [2023-09-01 13:14:38,804 INFO L231 Difference]: Finished difference. Result has 71 places, 106 transitions, 756 flow [2023-09-01 13:14:38,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=756, PETRI_PLACES=71, PETRI_TRANSITIONS=106} [2023-09-01 13:14:38,805 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 39 predicate places. [2023-09-01 13:14:38,805 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 106 transitions, 756 flow [2023-09-01 13:14:38,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 265.1875) internal successors, (4243), 16 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:38,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:14:38,806 INFO L208 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] [2023-09-01 13:14:38,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 13:14:39,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:14:39,020 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:14:39,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:14:39,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1986908042, now seen corresponding path program 3 times [2023-09-01 13:14:39,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:14:39,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986467099] [2023-09-01 13:14:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:14:39,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:14:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:39,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:14:39,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986467099] [2023-09-01 13:14:39,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986467099] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:14:39,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997235382] [2023-09-01 13:14:39,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:14:39,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:14:39,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:14:39,925 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) [2023-09-01 13:14:39,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 13:14:40,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:14:40,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:14:40,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-09-01 13:14:40,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:14:40,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:14:40,363 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 23 [2023-09-01 13:14:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:40,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:14:40,569 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:14:40,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 87 [2023-09-01 13:14:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:40,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997235382] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:14:40,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:14:40,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 14 [2023-09-01 13:14:40,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619169014] [2023-09-01 13:14:40,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:14:40,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 13:14:40,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:14:40,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 13:14:40,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-09-01 13:14:41,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-09-01 13:14:41,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 106 transitions, 756 flow. Second operand has 16 states, 16 states have (on average 265.0) internal successors, (4240), 16 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:41,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:14:41,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-09-01 13:14:41,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:14:42,520 INFO L130 PetriNetUnfolder]: 1174/1712 cut-off events. [2023-09-01 13:14:42,520 INFO L131 PetriNetUnfolder]: For 4842/4842 co-relation queries the response was YES. [2023-09-01 13:14:42,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7872 conditions, 1712 events. 1174/1712 cut-off events. For 4842/4842 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6492 event pairs, 261 based on Foata normal form. 1/1705 useless extension candidates. Maximal degree in co-relation 7814. Up to 1491 conditions per place. [2023-09-01 13:14:42,534 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 132 selfloop transitions, 45 changer transitions 1/178 dead transitions. [2023-09-01 13:14:42,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 178 transitions, 1578 flow [2023-09-01 13:14:42,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:14:42,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:14:42,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2449 transitions. [2023-09-01 13:14:42,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2023-09-01 13:14:42,541 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2449 transitions. [2023-09-01 13:14:42,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2449 transitions. [2023-09-01 13:14:42,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:14:42,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2449 transitions. [2023-09-01 13:14:42,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 272.1111111111111) internal successors, (2449), 9 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:42,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:42,553 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:42,554 INFO L175 Difference]: Start difference. First operand has 71 places, 106 transitions, 756 flow. Second operand 9 states and 2449 transitions. [2023-09-01 13:14:42,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 178 transitions, 1578 flow [2023-09-01 13:14:42,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 178 transitions, 1540 flow, removed 19 selfloop flow, removed 0 redundant places. [2023-09-01 13:14:42,568 INFO L231 Difference]: Finished difference. Result has 84 places, 132 transitions, 1098 flow [2023-09-01 13:14:42,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1098, PETRI_PLACES=84, PETRI_TRANSITIONS=132} [2023-09-01 13:14:42,569 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 52 predicate places. [2023-09-01 13:14:42,569 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 132 transitions, 1098 flow [2023-09-01 13:14:42,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 265.0) internal successors, (4240), 16 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:42,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:14:42,571 INFO L208 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] [2023-09-01 13:14:42,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 13:14:42,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:14:42,777 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:14:42,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:14:42,778 INFO L85 PathProgramCache]: Analyzing trace with hash 291437452, now seen corresponding path program 4 times [2023-09-01 13:14:42,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:14:42,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698401811] [2023-09-01 13:14:42,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:14:42,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:14:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:43,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:14:43,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698401811] [2023-09-01 13:14:43,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698401811] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:14:43,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010191547] [2023-09-01 13:14:43,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:14:43,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:14:43,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:14:43,581 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) [2023-09-01 13:14:43,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 13:14:43,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:14:43,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:14:43,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-09-01 13:14:43,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:14:43,966 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:14:43,966 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 23 [2023-09-01 13:14:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:44,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:14:44,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:14:44,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 87 [2023-09-01 13:14:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:44,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010191547] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:14:44,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:14:44,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 14 [2023-09-01 13:14:44,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735822710] [2023-09-01 13:14:44,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:14:44,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 13:14:44,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:14:44,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 13:14:44,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-09-01 13:14:45,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-09-01 13:14:45,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 132 transitions, 1098 flow. Second operand has 16 states, 16 states have (on average 265.0) internal successors, (4240), 16 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:45,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:14:45,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-09-01 13:14:45,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:14:46,366 INFO L130 PetriNetUnfolder]: 1331/1940 cut-off events. [2023-09-01 13:14:46,366 INFO L131 PetriNetUnfolder]: For 7108/7108 co-relation queries the response was YES. [2023-09-01 13:14:46,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9564 conditions, 1940 events. 1331/1940 cut-off events. For 7108/7108 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7570 event pairs, 310 based on Foata normal form. 1/1941 useless extension candidates. Maximal degree in co-relation 9499. Up to 1713 conditions per place. [2023-09-01 13:14:46,383 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 143 selfloop transitions, 54 changer transitions 1/198 dead transitions. [2023-09-01 13:14:46,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 198 transitions, 1963 flow [2023-09-01 13:14:46,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:14:46,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:14:46,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2445 transitions. [2023-09-01 13:14:46,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39833822091886606 [2023-09-01 13:14:46,389 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2445 transitions. [2023-09-01 13:14:46,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2445 transitions. [2023-09-01 13:14:46,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:14:46,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2445 transitions. [2023-09-01 13:14:46,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 271.6666666666667) internal successors, (2445), 9 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:46,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:46,401 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:46,401 INFO L175 Difference]: Start difference. First operand has 84 places, 132 transitions, 1098 flow. Second operand 9 states and 2445 transitions. [2023-09-01 13:14:46,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 198 transitions, 1963 flow [2023-09-01 13:14:46,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 198 transitions, 1866 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-09-01 13:14:46,417 INFO L231 Difference]: Finished difference. Result has 95 places, 157 transitions, 1453 flow [2023-09-01 13:14:46,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1453, PETRI_PLACES=95, PETRI_TRANSITIONS=157} [2023-09-01 13:14:46,418 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 63 predicate places. [2023-09-01 13:14:46,418 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 157 transitions, 1453 flow [2023-09-01 13:14:46,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 265.0) internal successors, (4240), 16 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:46,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:14:46,419 INFO L208 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] [2023-09-01 13:14:46,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 13:14:46,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:14:46,625 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:14:46,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:14:46,625 INFO L85 PathProgramCache]: Analyzing trace with hash 439711722, now seen corresponding path program 5 times [2023-09-01 13:14:46,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:14:46,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998305205] [2023-09-01 13:14:46,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:14:46,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:14:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:47,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:14:47,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998305205] [2023-09-01 13:14:47,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998305205] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:14:47,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585111588] [2023-09-01 13:14:47,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:14:47,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:14:47,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:14:47,558 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) [2023-09-01 13:14:47,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 13:14:47,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:14:47,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:14:47,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-09-01 13:14:47,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:14:48,096 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:14:48,109 INFO L321 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2023-09-01 13:14:48,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2023-09-01 13:14:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:48,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:14:48,329 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:14:48,330 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 17 [2023-09-01 13:14:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:48,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585111588] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:14:48,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:14:48,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 17 [2023-09-01 13:14:48,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106847174] [2023-09-01 13:14:48,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:14:48,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:14:48,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:14:48,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:14:48,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:14:49,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-09-01 13:14:49,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 157 transitions, 1453 flow. Second operand has 19 states, 19 states have (on average 264.7368421052632) internal successors, (5030), 19 states have internal predecessors, (5030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:49,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:14:49,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-09-01 13:14:49,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:14:50,150 INFO L130 PetriNetUnfolder]: 1582/2306 cut-off events. [2023-09-01 13:14:50,150 INFO L131 PetriNetUnfolder]: For 10547/10547 co-relation queries the response was YES. [2023-09-01 13:14:50,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12096 conditions, 2306 events. 1582/2306 cut-off events. For 10547/10547 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9502 event pairs, 173 based on Foata normal form. 1/2307 useless extension candidates. Maximal degree in co-relation 12025. Up to 1926 conditions per place. [2023-09-01 13:14:50,169 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 161 selfloop transitions, 83 changer transitions 1/245 dead transitions. [2023-09-01 13:14:50,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 245 transitions, 2578 flow [2023-09-01 13:14:50,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:14:50,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:14:50,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2457 transitions. [2023-09-01 13:14:50,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4002932551319648 [2023-09-01 13:14:50,176 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2457 transitions. [2023-09-01 13:14:50,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2457 transitions. [2023-09-01 13:14:50,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:14:50,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2457 transitions. [2023-09-01 13:14:50,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 273.0) internal successors, (2457), 9 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:50,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:50,187 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:50,187 INFO L175 Difference]: Start difference. First operand has 95 places, 157 transitions, 1453 flow. Second operand 9 states and 2457 transitions. [2023-09-01 13:14:50,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 245 transitions, 2578 flow [2023-09-01 13:14:50,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 245 transitions, 2460 flow, removed 39 selfloop flow, removed 1 redundant places. [2023-09-01 13:14:50,220 INFO L231 Difference]: Finished difference. Result has 107 places, 190 transitions, 1950 flow [2023-09-01 13:14:50,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1950, PETRI_PLACES=107, PETRI_TRANSITIONS=190} [2023-09-01 13:14:50,221 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 75 predicate places. [2023-09-01 13:14:50,221 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 190 transitions, 1950 flow [2023-09-01 13:14:50,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 264.7368421052632) internal successors, (5030), 19 states have internal predecessors, (5030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:50,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:14:50,222 INFO L208 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] [2023-09-01 13:14:50,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 13:14:50,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 13:14:50,429 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:14:50,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:14:50,430 INFO L85 PathProgramCache]: Analyzing trace with hash -300642656, now seen corresponding path program 6 times [2023-09-01 13:14:50,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:14:50,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114349267] [2023-09-01 13:14:50,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:14:50,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:14:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:51,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:14:51,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114349267] [2023-09-01 13:14:51,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114349267] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:14:51,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375913889] [2023-09-01 13:14:51,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:14:51,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:14:51,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:14:51,387 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:14:51,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 13:14:51,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:14:51,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:14:51,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 13:14:51,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:14:51,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:14:51,629 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:14:51,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-09-01 13:14:51,904 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-09-01 13:14:51,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-09-01 13:14:52,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:14:52,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-09-01 13:14:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:52,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:14:53,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:14:53,188 INFO L350 Elim1Store]: Elim1 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 52 treesize of output 40 [2023-09-01 13:14:53,212 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:14:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:14:53,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375913889] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:14:53,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:14:53,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 19 [2023-09-01 13:14:53,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322233333] [2023-09-01 13:14:53,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:14:53,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 13:14:53,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:14:53,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 13:14:53,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-09-01 13:15:02,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:15:06,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:15:11,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:15:17,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 13:15:20,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:15:26,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:15:29,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:15:31,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 682 [2023-09-01 13:15:31,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 190 transitions, 1950 flow. Second operand has 21 states, 21 states have (on average 249.47619047619048) internal successors, (5239), 21 states have internal predecessors, (5239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:15:31,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:15:31,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 682 [2023-09-01 13:15:31,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:15:32,677 INFO L130 PetriNetUnfolder]: 1670/2435 cut-off events. [2023-09-01 13:15:32,678 INFO L131 PetriNetUnfolder]: For 13819/13819 co-relation queries the response was YES. [2023-09-01 13:15:32,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13455 conditions, 2435 events. 1670/2435 cut-off events. For 13819/13819 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10103 event pairs, 192 based on Foata normal form. 1/2436 useless extension candidates. Maximal degree in co-relation 13378. Up to 2078 conditions per place. [2023-09-01 13:15:32,699 INFO L137 encePairwiseOnDemand]: 669/682 looper letters, 156 selfloop transitions, 87 changer transitions 1/244 dead transitions. [2023-09-01 13:15:32,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 244 transitions, 2824 flow [2023-09-01 13:15:32,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 13:15:32,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 13:15:32,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2816 transitions. [2023-09-01 13:15:32,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2023-09-01 13:15:32,707 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2816 transitions. [2023-09-01 13:15:32,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2816 transitions. [2023-09-01 13:15:32,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:15:32,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2816 transitions. [2023-09-01 13:15:32,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 256.0) internal successors, (2816), 11 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:15:32,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:15:32,719 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:15:32,720 INFO L175 Difference]: Start difference. First operand has 107 places, 190 transitions, 1950 flow. Second operand 11 states and 2816 transitions. [2023-09-01 13:15:32,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 244 transitions, 2824 flow [2023-09-01 13:15:32,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 244 transitions, 2666 flow, removed 63 selfloop flow, removed 2 redundant places. [2023-09-01 13:15:32,772 INFO L231 Difference]: Finished difference. Result has 119 places, 199 transitions, 2177 flow [2023-09-01 13:15:32,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=1802, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2177, PETRI_PLACES=119, PETRI_TRANSITIONS=199} [2023-09-01 13:15:32,773 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 87 predicate places. [2023-09-01 13:15:32,773 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 199 transitions, 2177 flow [2023-09-01 13:15:32,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 249.47619047619048) internal successors, (5239), 21 states have internal predecessors, (5239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:15:32,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:15:32,774 INFO L208 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] [2023-09-01 13:15:32,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 13:15:32,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 13:15:32,980 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:15:32,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:15:32,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1927164992, now seen corresponding path program 7 times [2023-09-01 13:15:32,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:15:32,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173241343] [2023-09-01 13:15:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:15:32,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:15:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:15:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:15:33,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:15:33,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173241343] [2023-09-01 13:15:33,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173241343] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:15:33,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9403224] [2023-09-01 13:15:33,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:15:33,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:15:33,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:15:33,717 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:15:33,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 13:15:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:15:33,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-09-01 13:15:33,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:15:34,146 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:15:34,146 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 23 [2023-09-01 13:15:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:15:34,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:15:34,335 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:15:34,335 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 17 [2023-09-01 13:15:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:15:34,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9403224] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:15:34,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:15:34,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 14 [2023-09-01 13:15:34,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238570874] [2023-09-01 13:15:34,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:15:34,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 13:15:34,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:15:34,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 13:15:34,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-09-01 13:15:35,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-09-01 13:15:35,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 199 transitions, 2177 flow. Second operand has 16 states, 16 states have (on average 265.1875) internal successors, (4243), 16 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:15:35,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:15:35,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-09-01 13:15:35,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:15:36,196 INFO L130 PetriNetUnfolder]: 1760/2568 cut-off events. [2023-09-01 13:15:36,196 INFO L131 PetriNetUnfolder]: For 15403/15403 co-relation queries the response was YES. [2023-09-01 13:15:36,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14668 conditions, 2568 events. 1760/2568 cut-off events. For 15403/15403 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10851 event pairs, 205 based on Foata normal form. 1/2569 useless extension candidates. Maximal degree in co-relation 14584. Up to 2207 conditions per place. [2023-09-01 13:15:36,216 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 167 selfloop transitions, 84 changer transitions 1/252 dead transitions. [2023-09-01 13:15:36,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 252 transitions, 3034 flow [2023-09-01 13:15:36,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:15:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:15:36,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2459 transitions. [2023-09-01 13:15:36,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40061909416748126 [2023-09-01 13:15:36,220 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2459 transitions. [2023-09-01 13:15:36,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2459 transitions. [2023-09-01 13:15:36,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:15:36,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2459 transitions. [2023-09-01 13:15:36,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 273.22222222222223) internal successors, (2459), 9 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:15:36,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:15:36,230 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:15:36,230 INFO L175 Difference]: Start difference. First operand has 119 places, 199 transitions, 2177 flow. Second operand 9 states and 2459 transitions. [2023-09-01 13:15:36,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 252 transitions, 3034 flow [2023-09-01 13:15:36,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 252 transitions, 2932 flow, removed 32 selfloop flow, removed 4 redundant places. [2023-09-01 13:15:36,285 INFO L231 Difference]: Finished difference. Result has 125 places, 205 transitions, 2356 flow [2023-09-01 13:15:36,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=2075, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2356, PETRI_PLACES=125, PETRI_TRANSITIONS=205} [2023-09-01 13:15:36,286 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 93 predicate places. [2023-09-01 13:15:36,286 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 205 transitions, 2356 flow [2023-09-01 13:15:36,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 265.1875) internal successors, (4243), 16 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:15:36,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:15:36,287 INFO L208 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] [2023-09-01 13:15:36,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 13:15:36,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 13:15:36,493 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:15:36,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:15:36,493 INFO L85 PathProgramCache]: Analyzing trace with hash -881735812, now seen corresponding path program 8 times [2023-09-01 13:15:36,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:15:36,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623594324] [2023-09-01 13:15:36,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:15:36,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:15:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:15:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:15:37,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:15:37,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623594324] [2023-09-01 13:15:37,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623594324] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:15:37,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739453718] [2023-09-01 13:15:37,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:15:37,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:15:37,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:15:37,758 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:15:37,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 13:15:37,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:15:37,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:15:37,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 13:15:37,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:15:37,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:15:38,015 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:15:38,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-09-01 13:15:38,332 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:15:38,359 INFO L321 Elim1Store]: treesize reduction 67, result has 22.1 percent of original size [2023-09-01 13:15:38,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 41 [2023-09-01 13:15:38,755 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:15:38,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 130 [2023-09-01 13:15:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:15:38,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:15:41,190 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:15:41,190 INFO L350 Elim1Store]: Elim1 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 52 treesize of output 40 [2023-09-01 13:15:41,206 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:15:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:15:41,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739453718] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:15:41,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:15:41,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 27 [2023-09-01 13:15:41,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085528622] [2023-09-01 13:15:41,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:15:41,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 13:15:41,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:15:41,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 13:15:41,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2023-09-01 13:15:45,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:15:50,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 682 [2023-09-01 13:15:50,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 205 transitions, 2356 flow. Second operand has 29 states, 29 states have (on average 240.31034482758622) internal successors, (6969), 29 states have internal predecessors, (6969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:15:50,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:15:50,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 682 [2023-09-01 13:15:50,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:15:51,974 INFO L130 PetriNetUnfolder]: 1904/2777 cut-off events. [2023-09-01 13:15:51,974 INFO L131 PetriNetUnfolder]: For 19179/19179 co-relation queries the response was YES. [2023-09-01 13:15:51,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16267 conditions, 2777 events. 1904/2777 cut-off events. For 19179/19179 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 11953 event pairs, 214 based on Foata normal form. 1/2778 useless extension candidates. Maximal degree in co-relation 16183. Up to 2331 conditions per place. [2023-09-01 13:15:51,996 INFO L137 encePairwiseOnDemand]: 666/682 looper letters, 169 selfloop transitions, 94 changer transitions 1/264 dead transitions. [2023-09-01 13:15:51,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 264 transitions, 3321 flow [2023-09-01 13:15:51,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:15:51,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:15:51,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3196 transitions. [2023-09-01 13:15:52,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604782314459734 [2023-09-01 13:15:52,033 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3196 transitions. [2023-09-01 13:15:52,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3196 transitions. [2023-09-01 13:15:52,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:15:52,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3196 transitions. [2023-09-01 13:15:52,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 245.84615384615384) internal successors, (3196), 13 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:15:52,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:15:52,044 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:15:52,044 INFO L175 Difference]: Start difference. First operand has 125 places, 205 transitions, 2356 flow. Second operand 13 states and 3196 transitions. [2023-09-01 13:15:52,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 264 transitions, 3321 flow [2023-09-01 13:15:52,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 264 transitions, 3101 flow, removed 30 selfloop flow, removed 6 redundant places. [2023-09-01 13:15:52,108 INFO L231 Difference]: Finished difference. Result has 133 places, 215 transitions, 2515 flow [2023-09-01 13:15:52,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=2136, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2515, PETRI_PLACES=133, PETRI_TRANSITIONS=215} [2023-09-01 13:15:52,109 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 101 predicate places. [2023-09-01 13:15:52,109 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 215 transitions, 2515 flow [2023-09-01 13:15:52,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 240.31034482758622) internal successors, (6969), 29 states have internal predecessors, (6969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:15:52,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:15:52,110 INFO L208 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] [2023-09-01 13:15:52,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 13:15:52,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 13:15:52,317 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:15:52,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:15:52,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1755339952, now seen corresponding path program 9 times [2023-09-01 13:15:52,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:15:52,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422333661] [2023-09-01 13:15:52,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:15:52,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:15:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:15:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:15:53,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:15:53,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422333661] [2023-09-01 13:15:53,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422333661] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:15:53,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563610810] [2023-09-01 13:15:53,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:15:53,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:15:53,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:15:53,229 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:15:53,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 13:15:53,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 13:15:53,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:15:53,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 13:15:53,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:15:53,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:15:53,482 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:15:53,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-09-01 13:15:53,699 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-09-01 13:15:53,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-09-01 13:15:53,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:15:53,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-09-01 13:15:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:15:54,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:15:57,018 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:15:57,018 INFO L350 Elim1Store]: Elim1 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 52 treesize of output 40 [2023-09-01 13:15:57,037 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:15:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:15:57,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563610810] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:15:57,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:15:57,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 19 [2023-09-01 13:15:57,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632169700] [2023-09-01 13:15:57,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:15:57,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 13:15:57,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:15:57,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 13:15:57,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=352, Unknown=1, NotChecked=0, Total=420 [2023-09-01 13:15:59,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:16:10,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:16:14,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:16:24,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:16:28,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:16:28,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 682 [2023-09-01 13:16:28,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 215 transitions, 2515 flow. Second operand has 21 states, 21 states have (on average 248.47619047619048) internal successors, (5218), 21 states have internal predecessors, (5218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:28,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:16:28,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 682 [2023-09-01 13:16:28,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:16:28,967 INFO L130 PetriNetUnfolder]: 1992/2906 cut-off events. [2023-09-01 13:16:28,968 INFO L131 PetriNetUnfolder]: For 21387/21387 co-relation queries the response was YES. [2023-09-01 13:16:28,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17222 conditions, 2906 events. 1992/2906 cut-off events. For 21387/21387 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12654 event pairs, 257 based on Foata normal form. 1/2907 useless extension candidates. Maximal degree in co-relation 17131. Up to 2544 conditions per place. [2023-09-01 13:16:28,986 INFO L137 encePairwiseOnDemand]: 669/682 looper letters, 183 selfloop transitions, 85 changer transitions 1/269 dead transitions. [2023-09-01 13:16:28,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 269 transitions, 3445 flow [2023-09-01 13:16:28,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 13:16:28,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 13:16:28,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2803 transitions. [2023-09-01 13:16:28,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736336976806185 [2023-09-01 13:16:28,991 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2803 transitions. [2023-09-01 13:16:28,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2803 transitions. [2023-09-01 13:16:28,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:16:28,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2803 transitions. [2023-09-01 13:16:28,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 254.8181818181818) internal successors, (2803), 11 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:28,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:28,999 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:29,000 INFO L175 Difference]: Start difference. First operand has 133 places, 215 transitions, 2515 flow. Second operand 11 states and 2803 transitions. [2023-09-01 13:16:29,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 269 transitions, 3445 flow [2023-09-01 13:16:29,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 269 transitions, 3154 flow, removed 80 selfloop flow, removed 7 redundant places. [2023-09-01 13:16:29,094 INFO L231 Difference]: Finished difference. Result has 138 places, 221 transitions, 2540 flow [2023-09-01 13:16:29,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=2256, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2540, PETRI_PLACES=138, PETRI_TRANSITIONS=221} [2023-09-01 13:16:29,096 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 106 predicate places. [2023-09-01 13:16:29,096 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 221 transitions, 2540 flow [2023-09-01 13:16:29,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 248.47619047619048) internal successors, (5218), 21 states have internal predecessors, (5218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:29,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:16:29,097 INFO L208 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] [2023-09-01 13:16:29,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 13:16:29,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 13:16:29,303 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:16:29,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:16:29,303 INFO L85 PathProgramCache]: Analyzing trace with hash -80728010, now seen corresponding path program 10 times [2023-09-01 13:16:29,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:16:29,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509464764] [2023-09-01 13:16:29,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:16:29,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:16:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:16:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:16:30,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:16:30,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509464764] [2023-09-01 13:16:30,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509464764] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:16:30,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289168844] [2023-09-01 13:16:30,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:16:30,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:16:30,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:16:30,231 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:16:30,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 13:16:30,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:16:30,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:16:30,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-09-01 13:16:30,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:16:30,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:16:30,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:16:30,823 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:16:30,833 INFO L321 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2023-09-01 13:16:30,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 29 [2023-09-01 13:16:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:16:30,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:16:31,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:31,139 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 36 [2023-09-01 13:16:31,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 13:16:31,155 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:16:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:16:31,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289168844] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:16:31,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:16:31,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-09-01 13:16:31,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6287472] [2023-09-01 13:16:31,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:16:31,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 13:16:31,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:16:31,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 13:16:31,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=640, Unknown=7, NotChecked=0, Total=756 [2023-09-01 13:16:31,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 682 [2023-09-01 13:16:31,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 221 transitions, 2540 flow. Second operand has 28 states, 28 states have (on average 233.35714285714286) internal successors, (6534), 28 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:31,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:16:31,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 682 [2023-09-01 13:16:31,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:16:32,561 INFO L130 PetriNetUnfolder]: 2232/3254 cut-off events. [2023-09-01 13:16:32,561 INFO L131 PetriNetUnfolder]: For 23943/23943 co-relation queries the response was YES. [2023-09-01 13:16:32,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19334 conditions, 3254 events. 2232/3254 cut-off events. For 23943/23943 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14531 event pairs, 218 based on Foata normal form. 1/3255 useless extension candidates. Maximal degree in co-relation 19248. Up to 2653 conditions per place. [2023-09-01 13:16:32,587 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 192 selfloop transitions, 113 changer transitions 1/306 dead transitions. [2023-09-01 13:16:32,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 306 transitions, 3867 flow [2023-09-01 13:16:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 13:16:32,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 13:16:32,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2409 transitions. [2023-09-01 13:16:32,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3532258064516129 [2023-09-01 13:16:32,591 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2409 transitions. [2023-09-01 13:16:32,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2409 transitions. [2023-09-01 13:16:32,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:16:32,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2409 transitions. [2023-09-01 13:16:32,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 240.9) internal successors, (2409), 10 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:32,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:32,598 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:32,599 INFO L175 Difference]: Start difference. First operand has 138 places, 221 transitions, 2540 flow. Second operand 10 states and 2409 transitions. [2023-09-01 13:16:32,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 306 transitions, 3867 flow [2023-09-01 13:16:32,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 306 transitions, 3646 flow, removed 30 selfloop flow, removed 8 redundant places. [2023-09-01 13:16:32,721 INFO L231 Difference]: Finished difference. Result has 144 places, 251 transitions, 3093 flow [2023-09-01 13:16:32,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=2319, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3093, PETRI_PLACES=144, PETRI_TRANSITIONS=251} [2023-09-01 13:16:32,722 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 112 predicate places. [2023-09-01 13:16:32,722 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 251 transitions, 3093 flow [2023-09-01 13:16:32,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 233.35714285714286) internal successors, (6534), 28 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:32,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:16:32,724 INFO L208 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] [2023-09-01 13:16:32,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 13:16:32,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 13:16:32,930 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:16:32,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:16:32,930 INFO L85 PathProgramCache]: Analyzing trace with hash 714833744, now seen corresponding path program 11 times [2023-09-01 13:16:32,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:16:32,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232121004] [2023-09-01 13:16:32,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:16:32,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:16:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:16:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:16:33,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:16:33,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232121004] [2023-09-01 13:16:33,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232121004] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:16:33,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460970417] [2023-09-01 13:16:33,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:16:33,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:16:33,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:16:33,903 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:16:33,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 13:16:34,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:16:34,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:16:34,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 90 conjunts are in the unsatisfiable core [2023-09-01 13:16:34,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:16:34,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:16:34,129 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:16:34,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-09-01 13:16:34,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:16:34,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:16:34,531 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:16:34,554 INFO L321 Elim1Store]: treesize reduction 67, result has 22.1 percent of original size [2023-09-01 13:16:34,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 41 [2023-09-01 13:16:34,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:34,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-09-01 13:16:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:16:34,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:16:35,261 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_1013 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1013))) (let ((.cse0 (select (select .cse2 c_~A~0.base) c_~A~0.offset)) (.cse1 (select (select .cse2 c_~B~0.base) c_~B~0.offset))) (<= (+ .cse0 c_~csum~0 .cse1) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse2 c_~C~0.base (store (select .cse2 c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~B~0.base) c_~B~0.offset)))))) (forall ((~C~0.offset Int) (v_ArrVal_1013 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1013))) (let ((.cse4 (select (select .cse3 c_~A~0.base) c_~A~0.offset)) (.cse5 (select (select .cse3 c_~B~0.base) c_~B~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse3 c_~C~0.base (store (select .cse3 c_~C~0.base) ~C~0.offset (+ .cse4 .cse5))) c_~B~0.base) c_~B~0.offset)) (+ .cse4 c_~csum~0 .cse5)))))) is different from false [2023-09-01 13:16:35,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:35,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1622 treesize of output 1414 [2023-09-01 13:16:35,339 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:35,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 566 treesize of output 542 [2023-09-01 13:16:38,050 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:38,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 17 [2023-09-01 13:16:38,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2023-09-01 13:16:38,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:38,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 95 [2023-09-01 13:16:38,216 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:38,222 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:38,226 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:38,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2023-09-01 13:16:38,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:38,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 67 [2023-09-01 13:16:38,318 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:38,322 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:38,328 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:38,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-09-01 13:16:38,354 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:16:38,358 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:16:38,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 130 [2023-09-01 13:16:38,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:38,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 64 [2023-09-01 13:16:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-09-01 13:16:38,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460970417] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:16:38,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:16:38,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-09-01 13:16:38,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821241342] [2023-09-01 13:16:38,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:16:38,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 13:16:38,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:16:38,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 13:16:38,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=815, Unknown=1, NotChecked=58, Total=992 [2023-09-01 13:16:39,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 682 [2023-09-01 13:16:39,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 251 transitions, 3093 flow. Second operand has 32 states, 32 states have (on average 221.125) internal successors, (7076), 32 states have internal predecessors, (7076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:39,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:16:39,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 682 [2023-09-01 13:16:39,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:16:40,304 INFO L130 PetriNetUnfolder]: 2376/3463 cut-off events. [2023-09-01 13:16:40,304 INFO L131 PetriNetUnfolder]: For 30921/30921 co-relation queries the response was YES. [2023-09-01 13:16:40,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21593 conditions, 3463 events. 2376/3463 cut-off events. For 30921/30921 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15718 event pairs, 194 based on Foata normal form. 1/3464 useless extension candidates. Maximal degree in co-relation 21503. Up to 2730 conditions per place. [2023-09-01 13:16:40,329 INFO L137 encePairwiseOnDemand]: 670/682 looper letters, 189 selfloop transitions, 121 changer transitions 1/311 dead transitions. [2023-09-01 13:16:40,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 311 transitions, 4214 flow [2023-09-01 13:16:40,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:16:40,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:16:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2727 transitions. [2023-09-01 13:16:40,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33321114369501464 [2023-09-01 13:16:40,333 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2727 transitions. [2023-09-01 13:16:40,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2727 transitions. [2023-09-01 13:16:40,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:16:40,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2727 transitions. [2023-09-01 13:16:40,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 227.25) internal successors, (2727), 12 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:40,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:40,343 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:40,343 INFO L175 Difference]: Start difference. First operand has 144 places, 251 transitions, 3093 flow. Second operand 12 states and 2727 transitions. [2023-09-01 13:16:40,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 311 transitions, 4214 flow [2023-09-01 13:16:40,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 311 transitions, 3984 flow, removed 98 selfloop flow, removed 3 redundant places. [2023-09-01 13:16:40,458 INFO L231 Difference]: Finished difference. Result has 154 places, 261 transitions, 3355 flow [2023-09-01 13:16:40,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3355, PETRI_PLACES=154, PETRI_TRANSITIONS=261} [2023-09-01 13:16:40,458 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 122 predicate places. [2023-09-01 13:16:40,458 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 261 transitions, 3355 flow [2023-09-01 13:16:40,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 221.125) internal successors, (7076), 32 states have internal predecessors, (7076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:40,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:16:40,459 INFO L208 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] [2023-09-01 13:16:40,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 13:16:40,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:16:40,660 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:16:40,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:16:40,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1051616762, now seen corresponding path program 12 times [2023-09-01 13:16:40,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:16:40,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122090667] [2023-09-01 13:16:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:16:40,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:16:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:16:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:16:41,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:16:41,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122090667] [2023-09-01 13:16:41,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122090667] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:16:41,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382525182] [2023-09-01 13:16:41,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:16:41,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:16:41,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:16:41,548 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:16:41,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 13:16:41,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:16:41,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:16:41,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 90 conjunts are in the unsatisfiable core [2023-09-01 13:16:41,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:16:41,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:16:41,803 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:16:41,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-09-01 13:16:42,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:16:42,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:16:42,219 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-09-01 13:16:42,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-09-01 13:16:42,336 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:42,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 96 [2023-09-01 13:16:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:16:42,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:16:43,408 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1081 (Array Int Int)) (~C~0.offset Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1081))) (let ((.cse1 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) (.cse2 (select (select .cse0 c_~B~0.base) c_~B~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse0 c_~C~0.base (store (select .cse0 c_~C~0.base) ~C~0.offset (+ .cse1 .cse2))) c_~B~0.base) c_~B~0.offset)) (+ .cse1 c_~csum~0 .cse2))))) (forall ((v_ArrVal_1081 (Array Int Int)) (~C~0.offset Int)) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1081))) (let ((.cse3 (select (select .cse5 c_~A~0.base) c_~A~0.offset)) (.cse4 (select (select .cse5 c_~B~0.base) c_~B~0.offset))) (<= (+ .cse3 c_~csum~0 .cse4) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse5 c_~C~0.base (store (select .cse5 c_~C~0.base) ~C~0.offset (+ .cse3 .cse4))) c_~B~0.base) c_~B~0.offset))))))) is different from false [2023-09-01 13:16:43,456 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:43,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1772 treesize of output 1554 [2023-09-01 13:16:43,499 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:43,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 566 treesize of output 542 [2023-09-01 13:16:46,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:46,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 309 treesize of output 213 [2023-09-01 13:16:46,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 196 [2023-09-01 13:16:46,815 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,819 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,830 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,836 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,842 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,853 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,858 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,865 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,872 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,876 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,879 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:16:46,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-09-01 13:16:46,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-09-01 13:16:46,930 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,936 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,942 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,950 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,959 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,962 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,969 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,973 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,981 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,986 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,990 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:46,996 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:47,009 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:47,015 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:47,024 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:47,031 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:47,035 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:47,039 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:47,047 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:47,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2023-09-01 13:16:47,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:47,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 17 [2023-09-01 13:16:47,166 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:47,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 148 treesize of output 120 [2023-09-01 13:16:47,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 79 [2023-09-01 13:16:47,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2023-09-01 13:16:47,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:47,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 17 [2023-09-01 13:16:47,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:47,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 148 treesize of output 116 [2023-09-01 13:16:47,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:47,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 167 treesize of output 133 [2023-09-01 13:16:47,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:47,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 57 treesize of output 45 [2023-09-01 13:16:47,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2023-09-01 13:16:47,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:16:47,445 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-09-01 13:16:47,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 1 [2023-09-01 13:16:47,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:16:47,468 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-09-01 13:16:47,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 244 treesize of output 1 [2023-09-01 13:16:47,474 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:47,478 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:47,488 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:47,494 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:16:47,518 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:16:47,521 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:16:47,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 130 [2023-09-01 13:16:47,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:47,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 64 [2023-09-01 13:16:47,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-09-01 13:16:47,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382525182] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:16:47,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:16:47,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-09-01 13:16:47,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486063327] [2023-09-01 13:16:47,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:16:47,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 13:16:47,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:16:47,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 13:16:47,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=867, Unknown=1, NotChecked=60, Total=1056 [2023-09-01 13:16:48,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 682 [2023-09-01 13:16:48,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 261 transitions, 3355 flow. Second operand has 33 states, 33 states have (on average 221.1818181818182) internal successors, (7299), 33 states have internal predecessors, (7299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:48,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:16:48,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 682 [2023-09-01 13:16:48,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:16:49,354 INFO L130 PetriNetUnfolder]: 2496/3638 cut-off events. [2023-09-01 13:16:49,354 INFO L131 PetriNetUnfolder]: For 31245/31245 co-relation queries the response was YES. [2023-09-01 13:16:49,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23018 conditions, 3638 events. 2496/3638 cut-off events. For 31245/31245 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 16646 event pairs, 275 based on Foata normal form. 1/3639 useless extension candidates. Maximal degree in co-relation 22924. Up to 3056 conditions per place. [2023-09-01 13:16:49,377 INFO L137 encePairwiseOnDemand]: 670/682 looper letters, 201 selfloop transitions, 117 changer transitions 1/319 dead transitions. [2023-09-01 13:16:49,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 319 transitions, 4498 flow [2023-09-01 13:16:49,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:16:49,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:16:49,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2727 transitions. [2023-09-01 13:16:49,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33321114369501464 [2023-09-01 13:16:49,380 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2727 transitions. [2023-09-01 13:16:49,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2727 transitions. [2023-09-01 13:16:49,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:16:49,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2727 transitions. [2023-09-01 13:16:49,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 227.25) internal successors, (2727), 12 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:49,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:49,389 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:49,389 INFO L175 Difference]: Start difference. First operand has 154 places, 261 transitions, 3355 flow. Second operand 12 states and 2727 transitions. [2023-09-01 13:16:49,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 319 transitions, 4498 flow [2023-09-01 13:16:49,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 319 transitions, 4189 flow, removed 94 selfloop flow, removed 7 redundant places. [2023-09-01 13:16:49,509 INFO L231 Difference]: Finished difference. Result has 162 places, 274 transitions, 3643 flow [2023-09-01 13:16:49,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=3095, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3643, PETRI_PLACES=162, PETRI_TRANSITIONS=274} [2023-09-01 13:16:49,510 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 130 predicate places. [2023-09-01 13:16:49,510 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 274 transitions, 3643 flow [2023-09-01 13:16:49,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 221.1818181818182) internal successors, (7299), 33 states have internal predecessors, (7299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:49,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:16:49,511 INFO L208 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] [2023-09-01 13:16:49,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 13:16:49,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:16:49,717 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:16:49,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:16:49,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1176190886, now seen corresponding path program 13 times [2023-09-01 13:16:49,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:16:49,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098989302] [2023-09-01 13:16:49,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:16:49,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:16:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:16:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:16:50,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:16:50,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098989302] [2023-09-01 13:16:50,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098989302] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:16:50,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841329589] [2023-09-01 13:16:50,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:16:50,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:16:50,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:16:50,527 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:16:50,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 13:16:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:16:50,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-09-01 13:16:50,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:16:50,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:16:50,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:16:51,023 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:51,023 INFO L350 Elim1Store]: Elim1 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 20 [2023-09-01 13:16:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:16:51,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:16:51,191 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_1148 (Array Int Int))) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1148) c_~A~0.base) c_~A~0.offset) c_~csum~0) .cse0)) (forall ((v_ArrVal_1148 (Array Int Int))) (<= .cse0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1148) c_~A~0.base) c_~A~0.offset) c_~csum~0))))) is different from false [2023-09-01 13:16:51,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:51,202 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 36 [2023-09-01 13:16:51,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 13:16:51,214 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:16:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-09-01 13:16:51,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841329589] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:16:51,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:16:51,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 26 [2023-09-01 13:16:51,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651648644] [2023-09-01 13:16:51,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:16:51,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 13:16:51,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:16:51,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 13:16:51,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=594, Unknown=1, NotChecked=50, Total=756 [2023-09-01 13:16:51,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 682 [2023-09-01 13:16:51,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 274 transitions, 3643 flow. Second operand has 28 states, 28 states have (on average 233.64285714285714) internal successors, (6542), 28 states have internal predecessors, (6542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:51,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:16:51,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 682 [2023-09-01 13:16:51,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:16:52,678 INFO L130 PetriNetUnfolder]: 2616/3815 cut-off events. [2023-09-01 13:16:52,679 INFO L131 PetriNetUnfolder]: For 31583/31583 co-relation queries the response was YES. [2023-09-01 13:16:52,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24461 conditions, 3815 events. 2616/3815 cut-off events. For 31583/31583 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 17727 event pairs, 286 based on Foata normal form. 1/3816 useless extension candidates. Maximal degree in co-relation 24362. Up to 3191 conditions per place. [2023-09-01 13:16:52,707 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 211 selfloop transitions, 118 changer transitions 1/330 dead transitions. [2023-09-01 13:16:52,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 330 transitions, 4746 flow [2023-09-01 13:16:52,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 13:16:52,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 13:16:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2411 transitions. [2023-09-01 13:16:52,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3535190615835777 [2023-09-01 13:16:52,709 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2411 transitions. [2023-09-01 13:16:52,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2411 transitions. [2023-09-01 13:16:52,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:16:52,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2411 transitions. [2023-09-01 13:16:52,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 241.1) internal successors, (2411), 10 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:52,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:52,715 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:52,715 INFO L175 Difference]: Start difference. First operand has 162 places, 274 transitions, 3643 flow. Second operand 10 states and 2411 transitions. [2023-09-01 13:16:52,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 330 transitions, 4746 flow [2023-09-01 13:16:52,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 330 transitions, 4548 flow, removed 36 selfloop flow, removed 6 redundant places. [2023-09-01 13:16:52,809 INFO L231 Difference]: Finished difference. Result has 167 places, 283 transitions, 3899 flow [2023-09-01 13:16:52,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=3449, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3899, PETRI_PLACES=167, PETRI_TRANSITIONS=283} [2023-09-01 13:16:52,810 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 135 predicate places. [2023-09-01 13:16:52,810 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 283 transitions, 3899 flow [2023-09-01 13:16:52,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 233.64285714285714) internal successors, (6542), 28 states have internal predecessors, (6542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:16:52,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:16:52,811 INFO L208 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] [2023-09-01 13:16:52,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 13:16:53,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:16:53,018 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:16:53,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:16:53,018 INFO L85 PathProgramCache]: Analyzing trace with hash 334026134, now seen corresponding path program 14 times [2023-09-01 13:16:53,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:16:53,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434115225] [2023-09-01 13:16:53,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:16:53,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:16:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:16:54,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:16:54,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:16:54,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434115225] [2023-09-01 13:16:54,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434115225] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:16:54,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413641425] [2023-09-01 13:16:54,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:16:54,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:16:54,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:16:54,072 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:16:54,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 13:16:54,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:16:54,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:16:54,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 90 conjunts are in the unsatisfiable core [2023-09-01 13:16:54,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:16:54,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:16:54,306 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:16:54,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-09-01 13:16:54,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:16:54,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:16:54,632 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-09-01 13:16:54,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-09-01 13:16:54,794 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:54,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-09-01 13:16:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:16:54,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:16:59,459 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_1216 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1216))) (let ((.cse0 (select (select .cse2 c_~B~0.base) c_~B~0.offset)) (.cse1 (select (select .cse2 c_~A~0.base) c_~A~0.offset))) (<= (+ .cse0 c_~csum~0 .cse1) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse2 c_~C~0.base (store (select .cse2 c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~B~0.base) c_~B~0.offset)))))) (forall ((~C~0.offset Int) (v_ArrVal_1216 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1216))) (let ((.cse4 (select (select .cse3 c_~B~0.base) c_~B~0.offset)) (.cse5 (select (select .cse3 c_~A~0.base) c_~A~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse3 c_~C~0.base (store (select .cse3 c_~C~0.base) ~C~0.offset (+ .cse4 .cse5))) c_~B~0.base) c_~B~0.offset)) (+ .cse4 c_~csum~0 .cse5)))))) is different from false [2023-09-01 13:16:59,504 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:59,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2428 treesize of output 2114 [2023-09-01 13:16:59,545 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:59,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 566 treesize of output 542 [2023-09-01 13:17:02,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:17:02,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 17 [2023-09-01 13:17:02,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2023-09-01 13:17:02,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2023-09-01 13:17:02,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 43 [2023-09-01 13:17:02,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 101 [2023-09-01 13:17:02,261 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:17:02,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 101 treesize of output 75 [2023-09-01 13:17:02,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-09-01 13:17:02,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:17:02,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-09-01 13:17:02,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:17:02,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 26 [2023-09-01 13:17:02,314 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:17:02,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:17:02,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-09-01 13:17:02,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:17:02,335 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-09-01 13:17:02,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 1 [2023-09-01 13:17:02,359 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:17:02,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 38 treesize of output 32 [2023-09-01 13:17:02,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:17:02,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-09-01 13:17:02,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:17:02,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 772 treesize of output 530 [2023-09-01 13:17:02,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-09-01 13:17:02,745 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:17:02,757 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:17:02,759 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:17:02,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 130 [2023-09-01 13:17:02,958 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:17:02,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 64 [2023-09-01 13:17:03,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-09-01 13:17:03,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413641425] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:17:03,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:17:03,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-09-01 13:17:03,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966313594] [2023-09-01 13:17:03,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:17:03,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 13:17:03,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:17:03,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 13:17:03,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=707, Unknown=1, NotChecked=54, Total=870 [2023-09-01 13:17:03,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 682 [2023-09-01 13:17:03,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 283 transitions, 3899 flow. Second operand has 30 states, 30 states have (on average 221.26666666666668) internal successors, (6638), 30 states have internal predecessors, (6638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:03,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:17:03,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 682 [2023-09-01 13:17:03,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:17:04,670 INFO L130 PetriNetUnfolder]: 2704/3944 cut-off events. [2023-09-01 13:17:04,671 INFO L131 PetriNetUnfolder]: For 34585/34585 co-relation queries the response was YES. [2023-09-01 13:17:04,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25471 conditions, 3944 events. 2704/3944 cut-off events. For 34585/34585 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18449 event pairs, 281 based on Foata normal form. 1/3945 useless extension candidates. Maximal degree in co-relation 25371. Up to 3358 conditions per place. [2023-09-01 13:17:04,701 INFO L137 encePairwiseOnDemand]: 670/682 looper letters, 221 selfloop transitions, 115 changer transitions 1/337 dead transitions. [2023-09-01 13:17:04,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 337 transitions, 4959 flow [2023-09-01 13:17:04,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:17:04,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:17:04,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2725 transitions. [2023-09-01 13:17:04,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3329667644183773 [2023-09-01 13:17:04,703 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2725 transitions. [2023-09-01 13:17:04,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2725 transitions. [2023-09-01 13:17:04,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:17:04,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2725 transitions. [2023-09-01 13:17:04,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 227.08333333333334) internal successors, (2725), 12 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:04,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:04,712 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:04,713 INFO L175 Difference]: Start difference. First operand has 167 places, 283 transitions, 3899 flow. Second operand 12 states and 2725 transitions. [2023-09-01 13:17:04,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 337 transitions, 4959 flow [2023-09-01 13:17:04,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 337 transitions, 4710 flow, removed 62 selfloop flow, removed 6 redundant places. [2023-09-01 13:17:04,829 INFO L231 Difference]: Finished difference. Result has 174 places, 289 transitions, 4029 flow [2023-09-01 13:17:04,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=3650, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4029, PETRI_PLACES=174, PETRI_TRANSITIONS=289} [2023-09-01 13:17:04,829 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 142 predicate places. [2023-09-01 13:17:04,829 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 289 transitions, 4029 flow [2023-09-01 13:17:04,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 221.26666666666668) internal successors, (6638), 30 states have internal predecessors, (6638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:04,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:17:04,830 INFO L208 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] [2023-09-01 13:17:04,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 13:17:05,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:17:05,031 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:17:05,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:17:05,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1580879102, now seen corresponding path program 15 times [2023-09-01 13:17:05,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:17:05,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820700438] [2023-09-01 13:17:05,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:17:05,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:17:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:17:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:17:05,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:17:05,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820700438] [2023-09-01 13:17:05,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820700438] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:17:05,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181824200] [2023-09-01 13:17:05,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:17:05,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:17:05,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:17:05,810 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:17:05,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 13:17:05,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:17:05,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:17:05,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 80 conjunts are in the unsatisfiable core [2023-09-01 13:17:05,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:17:06,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:17:06,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:17:06,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:17:06,323 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 23 [2023-09-01 13:17:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:17:06,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:17:06,511 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~B~0.offset))) (and (forall ((~B~0.base Int) (v_ArrVal_1283 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1283))) (let ((.cse0 (select .cse1 ~B~0.base))) (<= (+ (select .cse0 c_~B~0.offset) c_~csum~0 (select (select .cse1 c_~A~0.base) c_~A~0.offset)) (+ (select .cse0 .cse2) c_~asum~0 c_~bsum~0))))) (forall ((~B~0.base Int) (v_ArrVal_1283 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1283))) (let ((.cse3 (select .cse4 ~B~0.base))) (<= (+ (select .cse3 .cse2) c_~asum~0 c_~bsum~0) (+ (select .cse3 c_~B~0.offset) c_~csum~0 (select (select .cse4 c_~A~0.base) c_~A~0.offset)))))))) is different from false [2023-09-01 13:17:06,518 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_1283 (Array Int Int))) (<= .cse0 (+ c_~csum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1283) c_~A~0.base) c_~A~0.offset)))) (forall ((v_ArrVal_1283 (Array Int Int))) (<= (+ c_~csum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1283) c_~A~0.base) c_~A~0.offset)) .cse0)))) is different from false [2023-09-01 13:17:06,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:17:06,532 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 36 [2023-09-01 13:17:06,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 13:17:06,545 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:17:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-09-01 13:17:06,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181824200] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:17:06,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:17:06,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2023-09-01 13:17:06,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832667961] [2023-09-01 13:17:06,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:17:06,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 13:17:06,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:17:06,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 13:17:06,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=466, Unknown=2, NotChecked=90, Total=650 [2023-09-01 13:17:08,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:17:08,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 682 [2023-09-01 13:17:08,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 289 transitions, 4029 flow. Second operand has 26 states, 26 states have (on average 233.53846153846155) internal successors, (6072), 26 states have internal predecessors, (6072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:08,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:17:08,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 682 [2023-09-01 13:17:08,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:17:10,003 INFO L130 PetriNetUnfolder]: 2992/4366 cut-off events. [2023-09-01 13:17:10,004 INFO L131 PetriNetUnfolder]: For 40104/40104 co-relation queries the response was YES. [2023-09-01 13:17:10,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28264 conditions, 4366 events. 2992/4366 cut-off events. For 40104/40104 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20878 event pairs, 349 based on Foata normal form. 1/4367 useless extension candidates. Maximal degree in co-relation 28160. Up to 3406 conditions per place. [2023-09-01 13:17:10,040 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 212 selfloop transitions, 155 changer transitions 1/368 dead transitions. [2023-09-01 13:17:10,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 368 transitions, 5431 flow [2023-09-01 13:17:10,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 13:17:10,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 13:17:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2417 transitions. [2023-09-01 13:17:10,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3543988269794721 [2023-09-01 13:17:10,043 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2417 transitions. [2023-09-01 13:17:10,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2417 transitions. [2023-09-01 13:17:10,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:17:10,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2417 transitions. [2023-09-01 13:17:10,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 241.7) internal successors, (2417), 10 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:10,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:10,108 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:10,108 INFO L175 Difference]: Start difference. First operand has 174 places, 289 transitions, 4029 flow. Second operand 10 states and 2417 transitions. [2023-09-01 13:17:10,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 368 transitions, 5431 flow [2023-09-01 13:17:10,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 368 transitions, 5123 flow, removed 48 selfloop flow, removed 9 redundant places. [2023-09-01 13:17:10,250 INFO L231 Difference]: Finished difference. Result has 177 places, 312 transitions, 4502 flow [2023-09-01 13:17:10,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=3735, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4502, PETRI_PLACES=177, PETRI_TRANSITIONS=312} [2023-09-01 13:17:10,251 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 145 predicate places. [2023-09-01 13:17:10,251 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 312 transitions, 4502 flow [2023-09-01 13:17:10,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 233.53846153846155) internal successors, (6072), 26 states have internal predecessors, (6072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:10,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:17:10,252 INFO L208 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] [2023-09-01 13:17:10,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 13:17:10,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:17:10,458 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:17:10,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:17:10,458 INFO L85 PathProgramCache]: Analyzing trace with hash 622578974, now seen corresponding path program 16 times [2023-09-01 13:17:10,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:17:10,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524773788] [2023-09-01 13:17:10,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:17:10,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:17:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:17:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:17:11,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:17:11,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524773788] [2023-09-01 13:17:11,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524773788] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:17:11,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461781599] [2023-09-01 13:17:11,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:17:11,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:17:11,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:17:11,128 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:17:11,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 13:17:11,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:17:11,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:17:11,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-09-01 13:17:11,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:17:11,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:17:11,548 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 23 [2023-09-01 13:17:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:17:11,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:17:11,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:17:11,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 87 [2023-09-01 13:17:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:17:11,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461781599] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:17:11,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:17:11,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-09-01 13:17:11,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164637380] [2023-09-01 13:17:11,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:17:11,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 13:17:11,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:17:11,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 13:17:11,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-09-01 13:17:12,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-09-01 13:17:12,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 312 transitions, 4502 flow. Second operand has 17 states, 17 states have (on average 265.11764705882354) internal successors, (4507), 17 states have internal predecessors, (4507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:12,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:17:12,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-09-01 13:17:12,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:17:13,788 INFO L130 PetriNetUnfolder]: 3241/4730 cut-off events. [2023-09-01 13:17:13,788 INFO L131 PetriNetUnfolder]: For 49311/49311 co-relation queries the response was YES. [2023-09-01 13:17:13,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32204 conditions, 4730 events. 3241/4730 cut-off events. For 49311/49311 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 22780 event pairs, 1004 based on Foata normal form. 1/4731 useless extension candidates. Maximal degree in co-relation 32098. Up to 4391 conditions per place. [2023-09-01 13:17:13,826 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 319 selfloop transitions, 67 changer transitions 1/387 dead transitions. [2023-09-01 13:17:13,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 387 transitions, 6271 flow [2023-09-01 13:17:13,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:17:13,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:17:13,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2457 transitions. [2023-09-01 13:17:13,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4002932551319648 [2023-09-01 13:17:13,828 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2457 transitions. [2023-09-01 13:17:13,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2457 transitions. [2023-09-01 13:17:13,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:17:13,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2457 transitions. [2023-09-01 13:17:13,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 273.0) internal successors, (2457), 9 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:13,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:13,835 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:13,836 INFO L175 Difference]: Start difference. First operand has 177 places, 312 transitions, 4502 flow. Second operand 9 states and 2457 transitions. [2023-09-01 13:17:13,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 387 transitions, 6271 flow [2023-09-01 13:17:14,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 387 transitions, 5964 flow, removed 82 selfloop flow, removed 5 redundant places. [2023-09-01 13:17:14,038 INFO L231 Difference]: Finished difference. Result has 184 places, 345 transitions, 5155 flow [2023-09-01 13:17:14,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=4221, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5155, PETRI_PLACES=184, PETRI_TRANSITIONS=345} [2023-09-01 13:17:14,039 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 152 predicate places. [2023-09-01 13:17:14,040 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 345 transitions, 5155 flow [2023-09-01 13:17:14,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 265.11764705882354) internal successors, (4507), 17 states have internal predecessors, (4507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:14,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:17:14,041 INFO L208 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] [2023-09-01 13:17:14,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 13:17:14,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:17:14,241 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:17:14,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:17:14,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1723736996, now seen corresponding path program 17 times [2023-09-01 13:17:14,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:17:14,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927139360] [2023-09-01 13:17:14,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:17:14,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:17:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:17:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:17:14,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:17:14,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927139360] [2023-09-01 13:17:14,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927139360] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:17:14,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50428600] [2023-09-01 13:17:14,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:17:14,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:17:14,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:17:14,929 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:17:14,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 13:17:15,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:17:15,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:17:15,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 81 conjunts are in the unsatisfiable core [2023-09-01 13:17:15,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:17:15,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:17:15,510 INFO L350 Elim1Store]: Elim1 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 20 [2023-09-01 13:17:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:17:15,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:17:15,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:17:15,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 87 [2023-09-01 13:17:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:17:15,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50428600] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:17:15,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:17:15,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 6] total 21 [2023-09-01 13:17:15,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160298160] [2023-09-01 13:17:15,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:17:15,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 13:17:15,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:17:15,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 13:17:15,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-09-01 13:17:16,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 682 [2023-09-01 13:17:16,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 345 transitions, 5155 flow. Second operand has 23 states, 23 states have (on average 262.8695652173913) internal successors, (6046), 23 states have internal predecessors, (6046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:16,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:17:16,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 682 [2023-09-01 13:17:16,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:17:18,118 INFO L130 PetriNetUnfolder]: 3435/5015 cut-off events. [2023-09-01 13:17:18,119 INFO L131 PetriNetUnfolder]: For 55941/55941 co-relation queries the response was YES. [2023-09-01 13:17:18,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34683 conditions, 5015 events. 3435/5015 cut-off events. For 55941/55941 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 24443 event pairs, 1068 based on Foata normal form. 1/5016 useless extension candidates. Maximal degree in co-relation 34573. Up to 4742 conditions per place. [2023-09-01 13:17:18,159 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 347 selfloop transitions, 55 changer transitions 1/403 dead transitions. [2023-09-01 13:17:18,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 403 transitions, 6591 flow [2023-09-01 13:17:18,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:17:18,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:17:18,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2439 transitions. [2023-09-01 13:17:18,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3973607038123167 [2023-09-01 13:17:18,162 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2439 transitions. [2023-09-01 13:17:18,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2439 transitions. [2023-09-01 13:17:18,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:17:18,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2439 transitions. [2023-09-01 13:17:18,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:18,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:18,168 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:18,168 INFO L175 Difference]: Start difference. First operand has 184 places, 345 transitions, 5155 flow. Second operand 9 states and 2439 transitions. [2023-09-01 13:17:18,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 403 transitions, 6591 flow [2023-09-01 13:17:18,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 403 transitions, 6358 flow, removed 112 selfloop flow, removed 1 redundant places. [2023-09-01 13:17:18,364 INFO L231 Difference]: Finished difference. Result has 195 places, 361 transitions, 5447 flow [2023-09-01 13:17:18,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=4929, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5447, PETRI_PLACES=195, PETRI_TRANSITIONS=361} [2023-09-01 13:17:18,364 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 163 predicate places. [2023-09-01 13:17:18,364 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 361 transitions, 5447 flow [2023-09-01 13:17:18,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 262.8695652173913) internal successors, (6046), 23 states have internal predecessors, (6046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:18,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:17:18,365 INFO L208 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] [2023-09-01 13:17:18,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 13:17:18,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-09-01 13:17:18,566 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:17:18,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:17:18,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1020752882, now seen corresponding path program 18 times [2023-09-01 13:17:18,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:17:18,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581480270] [2023-09-01 13:17:18,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:17:18,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:17:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:17:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:17:19,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:17:19,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581480270] [2023-09-01 13:17:19,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581480270] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:17:19,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019468230] [2023-09-01 13:17:19,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:17:19,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:17:19,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:17:19,249 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:17:19,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 13:17:19,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:17:19,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:17:19,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-09-01 13:17:19,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:17:19,721 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:17:19,721 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 23 [2023-09-01 13:17:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:17:19,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:17:19,887 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:17:19,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 87 [2023-09-01 13:17:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:17:20,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019468230] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:17:20,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:17:20,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-09-01 13:17:20,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070384456] [2023-09-01 13:17:20,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:17:20,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 13:17:20,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:17:20,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 13:17:20,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-09-01 13:17:21,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-09-01 13:17:21,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 361 transitions, 5447 flow. Second operand has 17 states, 17 states have (on average 264.88235294117646) internal successors, (4503), 17 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:21,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:17:21,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-09-01 13:17:21,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:17:22,422 INFO L130 PetriNetUnfolder]: 3535/5162 cut-off events. [2023-09-01 13:17:22,423 INFO L131 PetriNetUnfolder]: For 57667/57667 co-relation queries the response was YES. [2023-09-01 13:17:22,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35485 conditions, 5162 events. 3535/5162 cut-off events. For 57667/57667 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 25249 event pairs, 1134 based on Foata normal form. 1/5163 useless extension candidates. Maximal degree in co-relation 35370. Up to 4959 conditions per place. [2023-09-01 13:17:22,549 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 351 selfloop transitions, 54 changer transitions 1/406 dead transitions. [2023-09-01 13:17:22,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 406 transitions, 6756 flow [2023-09-01 13:17:22,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:17:22,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:17:22,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2449 transitions. [2023-09-01 13:17:22,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2023-09-01 13:17:22,552 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2449 transitions. [2023-09-01 13:17:22,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2449 transitions. [2023-09-01 13:17:22,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:17:22,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2449 transitions. [2023-09-01 13:17:22,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 272.1111111111111) internal successors, (2449), 9 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:22,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:22,558 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:22,559 INFO L175 Difference]: Start difference. First operand has 195 places, 361 transitions, 5447 flow. Second operand 9 states and 2449 transitions. [2023-09-01 13:17:22,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 406 transitions, 6756 flow [2023-09-01 13:17:22,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 406 transitions, 6370 flow, removed 187 selfloop flow, removed 1 redundant places. [2023-09-01 13:17:22,790 INFO L231 Difference]: Finished difference. Result has 205 places, 371 transitions, 5469 flow [2023-09-01 13:17:22,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=5163, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5469, PETRI_PLACES=205, PETRI_TRANSITIONS=371} [2023-09-01 13:17:22,790 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 173 predicate places. [2023-09-01 13:17:22,790 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 371 transitions, 5469 flow [2023-09-01 13:17:22,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 264.88235294117646) internal successors, (4503), 17 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:22,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:17:22,791 INFO L208 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] [2023-09-01 13:17:22,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 13:17:22,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-09-01 13:17:22,992 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:17:22,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:17:22,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1784586078, now seen corresponding path program 19 times [2023-09-01 13:17:22,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:17:22,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594946501] [2023-09-01 13:17:22,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:17:22,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:17:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:17:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:17:24,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:17:24,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594946501] [2023-09-01 13:17:24,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594946501] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:17:24,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906786209] [2023-09-01 13:17:24,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:17:24,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:17:24,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:17:24,557 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:17:24,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 13:17:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:17:24,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 89 conjunts are in the unsatisfiable core [2023-09-01 13:17:24,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:17:24,799 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 13:17:24,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 13:17:24,867 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-09-01 13:17:24,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-09-01 13:17:24,931 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:17:24,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-09-01 13:17:25,284 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-09-01 13:17:25,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-09-01 13:17:25,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:17:25,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-09-01 13:17:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:17:25,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:17:26,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:17:26,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 118 [2023-09-01 13:17:26,946 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:17:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:17:27,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906786209] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:17:27,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:17:27,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 30 [2023-09-01 13:17:27,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012563918] [2023-09-01 13:17:27,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:17:27,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 13:17:27,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:17:27,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 13:17:27,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2023-09-01 13:17:39,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:17:43,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:17:48,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 13:17:59,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 682 [2023-09-01 13:17:59,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 371 transitions, 5469 flow. Second operand has 32 states, 32 states have (on average 234.09375) internal successors, (7491), 32 states have internal predecessors, (7491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:59,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:17:59,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 682 [2023-09-01 13:17:59,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:18:01,985 INFO L130 PetriNetUnfolder]: 3722/5438 cut-off events. [2023-09-01 13:18:01,985 INFO L131 PetriNetUnfolder]: For 58050/58050 co-relation queries the response was YES. [2023-09-01 13:18:02,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37390 conditions, 5438 events. 3722/5438 cut-off events. For 58050/58050 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 26617 event pairs, 1184 based on Foata normal form. 1/5439 useless extension candidates. Maximal degree in co-relation 36749. Up to 5160 conditions per place. [2023-09-01 13:18:02,033 INFO L137 encePairwiseOnDemand]: 670/682 looper letters, 375 selfloop transitions, 99 changer transitions 1/475 dead transitions. [2023-09-01 13:18:02,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 475 transitions, 7997 flow [2023-09-01 13:18:02,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 13:18:02,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 13:18:02,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4066 transitions. [2023-09-01 13:18:02,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35069863722615147 [2023-09-01 13:18:02,037 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4066 transitions. [2023-09-01 13:18:02,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4066 transitions. [2023-09-01 13:18:02,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:18:02,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4066 transitions. [2023-09-01 13:18:02,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 239.1764705882353) internal successors, (4066), 17 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:02,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 682.0) internal successors, (12276), 18 states have internal predecessors, (12276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:02,049 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 682.0) internal successors, (12276), 18 states have internal predecessors, (12276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:02,049 INFO L175 Difference]: Start difference. First operand has 205 places, 371 transitions, 5469 flow. Second operand 17 states and 4066 transitions. [2023-09-01 13:18:02,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 475 transitions, 7997 flow [2023-09-01 13:18:02,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 475 transitions, 7707 flow, removed 57 selfloop flow, removed 5 redundant places. [2023-09-01 13:18:02,230 INFO L231 Difference]: Finished difference. Result has 219 places, 419 transitions, 6541 flow [2023-09-01 13:18:02,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=5257, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6541, PETRI_PLACES=219, PETRI_TRANSITIONS=419} [2023-09-01 13:18:02,231 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 187 predicate places. [2023-09-01 13:18:02,231 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 419 transitions, 6541 flow [2023-09-01 13:18:02,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 234.09375) internal successors, (7491), 32 states have internal predecessors, (7491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:02,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:18:02,233 INFO L208 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] [2023-09-01 13:18:02,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 13:18:02,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-09-01 13:18:02,433 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:18:02,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:18:02,434 INFO L85 PathProgramCache]: Analyzing trace with hash 340804554, now seen corresponding path program 20 times [2023-09-01 13:18:02,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:18:02,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132949229] [2023-09-01 13:18:02,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:02,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:18:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:18:03,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:18:03,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132949229] [2023-09-01 13:18:03,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132949229] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:18:03,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272318339] [2023-09-01 13:18:03,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:18:03,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:18:03,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:18:03,495 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:18:03,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 13:18:03,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:18:03,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:18:03,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-09-01 13:18:03,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:18:03,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:18:03,905 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 23 [2023-09-01 13:18:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:18:03,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:18:04,079 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:18:04,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 87 [2023-09-01 13:18:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:18:04,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272318339] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:18:04,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:18:04,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 6] total 22 [2023-09-01 13:18:04,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369847939] [2023-09-01 13:18:04,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:18:04,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 13:18:04,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:18:04,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 13:18:04,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2023-09-01 13:18:06,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 682 [2023-09-01 13:18:06,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 419 transitions, 6541 flow. Second operand has 24 states, 24 states have (on average 251.58333333333334) internal successors, (6038), 24 states have internal predecessors, (6038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:06,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:18:06,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 682 [2023-09-01 13:18:06,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:18:07,820 INFO L130 PetriNetUnfolder]: 3888/5683 cut-off events. [2023-09-01 13:18:07,820 INFO L131 PetriNetUnfolder]: For 67270/67270 co-relation queries the response was YES. [2023-09-01 13:18:07,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39449 conditions, 5683 events. 3888/5683 cut-off events. For 67270/67270 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 28188 event pairs, 1212 based on Foata normal form. 1/5684 useless extension candidates. Maximal degree in co-relation 38805. Up to 5287 conditions per place. [2023-09-01 13:18:07,868 INFO L137 encePairwiseOnDemand]: 668/682 looper letters, 373 selfloop transitions, 108 changer transitions 1/482 dead transitions. [2023-09-01 13:18:07,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 482 transitions, 8322 flow [2023-09-01 13:18:07,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:18:07,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:18:07,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3092 transitions. [2023-09-01 13:18:07,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778103616813294 [2023-09-01 13:18:07,871 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3092 transitions. [2023-09-01 13:18:07,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3092 transitions. [2023-09-01 13:18:07,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:18:07,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3092 transitions. [2023-09-01 13:18:07,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 257.6666666666667) internal successors, (3092), 12 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:07,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:07,879 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:07,880 INFO L175 Difference]: Start difference. First operand has 219 places, 419 transitions, 6541 flow. Second operand 12 states and 3092 transitions. [2023-09-01 13:18:07,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 482 transitions, 8322 flow [2023-09-01 13:18:08,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 482 transitions, 8047 flow, removed 82 selfloop flow, removed 6 redundant places. [2023-09-01 13:18:08,082 INFO L231 Difference]: Finished difference. Result has 227 places, 438 transitions, 7070 flow [2023-09-01 13:18:08,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=6266, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7070, PETRI_PLACES=227, PETRI_TRANSITIONS=438} [2023-09-01 13:18:08,083 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 195 predicate places. [2023-09-01 13:18:08,083 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 438 transitions, 7070 flow [2023-09-01 13:18:08,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 251.58333333333334) internal successors, (6038), 24 states have internal predecessors, (6038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:08,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:18:08,084 INFO L208 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] [2023-09-01 13:18:08,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 13:18:08,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:18:08,285 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:18:08,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:18:08,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1986343822, now seen corresponding path program 21 times [2023-09-01 13:18:08,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:18:08,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888955128] [2023-09-01 13:18:08,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:08,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:18:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:18:08,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:18:08,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888955128] [2023-09-01 13:18:08,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888955128] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:18:08,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689194773] [2023-09-01 13:18:08,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:18:08,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:18:08,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:18:08,909 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:18:08,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 13:18:09,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:18:09,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:18:09,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-09-01 13:18:09,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:18:09,343 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:18:09,343 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 23 [2023-09-01 13:18:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:18:09,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:18:09,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:18:09,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 87 [2023-09-01 13:18:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:18:09,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689194773] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:18:09,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:18:09,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-09-01 13:18:09,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610142280] [2023-09-01 13:18:09,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:18:09,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 13:18:09,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:18:09,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 13:18:09,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-09-01 13:18:10,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-09-01 13:18:10,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 438 transitions, 7070 flow. Second operand has 17 states, 17 states have (on average 264.88235294117646) internal successors, (4503), 17 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:10,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:18:10,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-09-01 13:18:10,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:18:11,967 INFO L130 PetriNetUnfolder]: 3978/5816 cut-off events. [2023-09-01 13:18:11,968 INFO L131 PetriNetUnfolder]: For 73491/73491 co-relation queries the response was YES. [2023-09-01 13:18:11,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40857 conditions, 5816 events. 3978/5816 cut-off events. For 73491/73491 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 28963 event pairs, 1277 based on Foata normal form. 1/5817 useless extension candidates. Maximal degree in co-relation 40209. Up to 5508 conditions per place. [2023-09-01 13:18:12,015 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 385 selfloop transitions, 98 changer transitions 1/484 dead transitions. [2023-09-01 13:18:12,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 484 transitions, 8533 flow [2023-09-01 13:18:12,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:18:12,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:18:12,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2453 transitions. [2023-09-01 13:18:12,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3996415770609319 [2023-09-01 13:18:12,018 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2453 transitions. [2023-09-01 13:18:12,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2453 transitions. [2023-09-01 13:18:12,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:18:12,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2453 transitions. [2023-09-01 13:18:12,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 272.55555555555554) internal successors, (2453), 9 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:12,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:12,023 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:12,023 INFO L175 Difference]: Start difference. First operand has 227 places, 438 transitions, 7070 flow. Second operand 9 states and 2453 transitions. [2023-09-01 13:18:12,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 484 transitions, 8533 flow [2023-09-01 13:18:12,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 484 transitions, 8040 flow, removed 195 selfloop flow, removed 6 redundant places. [2023-09-01 13:18:12,235 INFO L231 Difference]: Finished difference. Result has 232 places, 445 transitions, 7048 flow [2023-09-01 13:18:12,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=6655, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7048, PETRI_PLACES=232, PETRI_TRANSITIONS=445} [2023-09-01 13:18:12,236 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 200 predicate places. [2023-09-01 13:18:12,236 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 445 transitions, 7048 flow [2023-09-01 13:18:12,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 264.88235294117646) internal successors, (4503), 17 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:12,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:18:12,237 INFO L208 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] [2023-09-01 13:18:12,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 13:18:12,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 13:18:12,441 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:18:12,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:18:12,441 INFO L85 PathProgramCache]: Analyzing trace with hash 572539344, now seen corresponding path program 22 times [2023-09-01 13:18:12,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:18:12,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055414430] [2023-09-01 13:18:12,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:12,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:18:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:18:13,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:18:13,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055414430] [2023-09-01 13:18:13,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055414430] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:18:13,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14243733] [2023-09-01 13:18:13,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:18:13,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:18:13,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:18:13,647 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:18:13,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 13:18:13,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:18:13,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:18:13,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 13:18:13,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:18:13,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:18:13,875 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:18:13,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-09-01 13:18:14,055 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-09-01 13:18:14,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-09-01 13:18:14,308 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:18:14,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-09-01 13:18:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:18:14,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:18:15,839 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:18:15,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 118 [2023-09-01 13:18:15,984 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:18:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:18:16,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14243733] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:18:16,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:18:16,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 27 [2023-09-01 13:18:16,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992337471] [2023-09-01 13:18:16,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:18:16,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 13:18:16,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:18:16,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 13:18:16,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2023-09-01 13:18:23,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:18:26,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:18:28,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:18:31,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:18:37,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:18:46,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:18:51,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 682 [2023-09-01 13:18:51,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 445 transitions, 7048 flow. Second operand has 29 states, 29 states have (on average 240.3448275862069) internal successors, (6970), 29 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:51,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:18:51,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 682 [2023-09-01 13:18:51,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:18:53,822 INFO L130 PetriNetUnfolder]: 4066/5945 cut-off events. [2023-09-01 13:18:53,823 INFO L131 PetriNetUnfolder]: For 70252/70252 co-relation queries the response was YES. [2023-09-01 13:18:53,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40775 conditions, 5945 events. 4066/5945 cut-off events. For 70252/70252 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 29725 event pairs, 1318 based on Foata normal form. 1/5946 useless extension candidates. Maximal degree in co-relation 40123. Up to 5641 conditions per place. [2023-09-01 13:18:53,875 INFO L137 encePairwiseOnDemand]: 669/682 looper letters, 383 selfloop transitions, 104 changer transitions 1/488 dead transitions. [2023-09-01 13:18:53,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 488 transitions, 8443 flow [2023-09-01 13:18:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:18:53,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:18:53,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3188 transitions. [2023-09-01 13:18:53,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35957590796300476 [2023-09-01 13:18:53,879 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3188 transitions. [2023-09-01 13:18:53,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3188 transitions. [2023-09-01 13:18:53,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:18:53,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3188 transitions. [2023-09-01 13:18:53,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 245.23076923076923) internal successors, (3188), 13 states have internal predecessors, (3188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:53,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:53,888 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:53,889 INFO L175 Difference]: Start difference. First operand has 232 places, 445 transitions, 7048 flow. Second operand 13 states and 3188 transitions. [2023-09-01 13:18:53,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 488 transitions, 8443 flow [2023-09-01 13:18:54,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 488 transitions, 8149 flow, removed 54 selfloop flow, removed 5 redundant places. [2023-09-01 13:18:54,143 INFO L231 Difference]: Finished difference. Result has 241 places, 451 transitions, 7148 flow [2023-09-01 13:18:54,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=6754, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7148, PETRI_PLACES=241, PETRI_TRANSITIONS=451} [2023-09-01 13:18:54,144 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 209 predicate places. [2023-09-01 13:18:54,145 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 451 transitions, 7148 flow [2023-09-01 13:18:54,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 240.3448275862069) internal successors, (6970), 29 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:54,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:18:54,146 INFO L208 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] [2023-09-01 13:18:54,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-09-01 13:18:54,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 13:18:54,352 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:18:54,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:18:54,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2138698910, now seen corresponding path program 23 times [2023-09-01 13:18:54,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:18:54,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544840807] [2023-09-01 13:18:54,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:54,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:18:54,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:18:55,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:18:55,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544840807] [2023-09-01 13:18:55,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544840807] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:18:55,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091234649] [2023-09-01 13:18:55,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:18:55,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:18:55,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:18:55,005 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:18:55,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 13:18:55,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:18:55,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:18:55,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-09-01 13:18:55,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:18:55,544 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:18:55,544 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 23 [2023-09-01 13:18:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:18:55,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:18:55,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:18:55,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95 [2023-09-01 13:18:55,903 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-09-01 13:18:55,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2023-09-01 13:18:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:18:56,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091234649] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:18:56,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:18:56,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-09-01 13:18:56,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432376911] [2023-09-01 13:18:56,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:18:56,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 13:18:56,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:18:56,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 13:18:56,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-09-01 13:18:56,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-09-01 13:18:56,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 451 transitions, 7148 flow. Second operand has 17 states, 17 states have (on average 265.29411764705884) internal successors, (4510), 17 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:56,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:18:56,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-09-01 13:18:56,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:18:58,422 INFO L130 PetriNetUnfolder]: 4166/6092 cut-off events. [2023-09-01 13:18:58,422 INFO L131 PetriNetUnfolder]: For 75636/75636 co-relation queries the response was YES. [2023-09-01 13:18:58,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41673 conditions, 6092 events. 4166/6092 cut-off events. For 75636/75636 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 30654 event pairs, 1380 based on Foata normal form. 1/6093 useless extension candidates. Maximal degree in co-relation 41019. Up to 5832 conditions per place. [2023-09-01 13:18:58,480 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 401 selfloop transitions, 90 changer transitions 1/492 dead transitions. [2023-09-01 13:18:58,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 492 transitions, 8520 flow [2023-09-01 13:18:58,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:18:58,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:18:58,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2443 transitions. [2023-09-01 13:18:58,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39801238188334964 [2023-09-01 13:18:58,484 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2443 transitions. [2023-09-01 13:18:58,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2443 transitions. [2023-09-01 13:18:58,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:18:58,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2443 transitions. [2023-09-01 13:18:58,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 271.44444444444446) internal successors, (2443), 9 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:58,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:58,488 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:58,488 INFO L175 Difference]: Start difference. First operand has 241 places, 451 transitions, 7148 flow. Second operand 9 states and 2443 transitions. [2023-09-01 13:18:58,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 492 transitions, 8520 flow [2023-09-01 13:18:58,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 492 transitions, 8192 flow, removed 62 selfloop flow, removed 10 redundant places. [2023-09-01 13:18:58,731 INFO L231 Difference]: Finished difference. Result has 243 places, 462 transitions, 7266 flow [2023-09-01 13:18:58,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=6824, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7266, PETRI_PLACES=243, PETRI_TRANSITIONS=462} [2023-09-01 13:18:58,731 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 211 predicate places. [2023-09-01 13:18:58,732 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 462 transitions, 7266 flow [2023-09-01 13:18:58,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 265.29411764705884) internal successors, (4510), 17 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:58,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:18:58,732 INFO L208 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] [2023-09-01 13:18:58,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 13:18:58,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:18:58,933 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:18:58,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:18:58,934 INFO L85 PathProgramCache]: Analyzing trace with hash 549899712, now seen corresponding path program 24 times [2023-09-01 13:18:58,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:18:58,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400955864] [2023-09-01 13:18:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:18:58,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:18:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:18:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:18:59,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:18:59,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400955864] [2023-09-01 13:18:59,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400955864] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:18:59,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941896076] [2023-09-01 13:18:59,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:18:59,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:18:59,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:18:59,548 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:18:59,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 13:18:59,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 13:18:59,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:18:59,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-09-01 13:18:59,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:18:59,959 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:18:59,959 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 23 [2023-09-01 13:18:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:18:59,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:19:00,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:19:00,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95 [2023-09-01 13:19:00,274 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-09-01 13:19:00,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2023-09-01 13:19:00,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:19:00,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941896076] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:19:00,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:19:00,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 14 [2023-09-01 13:19:00,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57860853] [2023-09-01 13:19:00,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:19:00,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 13:19:00,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:19:00,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 13:19:00,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-09-01 13:19:01,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-09-01 13:19:01,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 462 transitions, 7266 flow. Second operand has 16 states, 16 states have (on average 265.1875) internal successors, (4243), 16 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:01,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:19:01,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-09-01 13:19:01,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:19:02,716 INFO L130 PetriNetUnfolder]: 4266/6239 cut-off events. [2023-09-01 13:19:02,716 INFO L131 PetriNetUnfolder]: For 79067/79067 co-relation queries the response was YES. [2023-09-01 13:19:02,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42589 conditions, 6239 events. 4266/6239 cut-off events. For 79067/79067 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 31500 event pairs, 1420 based on Foata normal form. 1/6240 useless extension candidates. Maximal degree in co-relation 41931. Up to 5979 conditions per place. [2023-09-01 13:19:02,773 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 412 selfloop transitions, 91 changer transitions 1/504 dead transitions. [2023-09-01 13:19:02,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 504 transitions, 8697 flow [2023-09-01 13:19:02,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:19:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:19:02,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2445 transitions. [2023-09-01 13:19:02,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39833822091886606 [2023-09-01 13:19:02,775 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2445 transitions. [2023-09-01 13:19:02,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2445 transitions. [2023-09-01 13:19:02,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:19:02,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2445 transitions. [2023-09-01 13:19:02,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 271.6666666666667) internal successors, (2445), 9 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:02,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:02,780 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:02,780 INFO L175 Difference]: Start difference. First operand has 243 places, 462 transitions, 7266 flow. Second operand 9 states and 2445 transitions. [2023-09-01 13:19:02,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 504 transitions, 8697 flow [2023-09-01 13:19:03,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 504 transitions, 8408 flow, removed 62 selfloop flow, removed 4 redundant places. [2023-09-01 13:19:03,064 INFO L231 Difference]: Finished difference. Result has 251 places, 472 transitions, 7434 flow [2023-09-01 13:19:03,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=6979, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7434, PETRI_PLACES=251, PETRI_TRANSITIONS=472} [2023-09-01 13:19:03,065 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 219 predicate places. [2023-09-01 13:19:03,065 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 472 transitions, 7434 flow [2023-09-01 13:19:03,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 265.1875) internal successors, (4243), 16 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:03,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:19:03,066 INFO L208 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] [2023-09-01 13:19:03,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 13:19:03,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:19:03,273 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:19:03,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:19:03,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1102021878, now seen corresponding path program 25 times [2023-09-01 13:19:03,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:19:03,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442686602] [2023-09-01 13:19:03,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:19:03,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:19:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:19:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:19:03,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:19:03,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442686602] [2023-09-01 13:19:03,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442686602] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:19:03,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650596408] [2023-09-01 13:19:03,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:19:03,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:19:03,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:19:03,997 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:19:04,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 13:19:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:19:04,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-09-01 13:19:04,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:19:04,229 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 13:19:04,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 13:19:04,259 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 13:19:04,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 13:19:04,297 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-09-01 13:19:04,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 13:19:04,468 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 13:19:04,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2023-09-01 13:19:04,595 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:19:04,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2023-09-01 13:19:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:19:04,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:19:04,732 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:19:04,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 215 [2023-09-01 13:19:05,673 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:19:05,674 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:19:05,722 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-09-01 13:19:05,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 65 [2023-09-01 13:19:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:19:06,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650596408] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:19:06,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:19:06,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-09-01 13:19:06,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544975026] [2023-09-01 13:19:06,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:19:06,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 13:19:06,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:19:06,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 13:19:06,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-09-01 13:19:07,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 682 [2023-09-01 13:19:07,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 472 transitions, 7434 flow. Second operand has 23 states, 23 states have (on average 252.2608695652174) internal successors, (5802), 23 states have internal predecessors, (5802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:07,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:19:07,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 682 [2023-09-01 13:19:07,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:19:09,150 INFO L130 PetriNetUnfolder]: 4364/6382 cut-off events. [2023-09-01 13:19:09,151 INFO L131 PetriNetUnfolder]: For 85821/85821 co-relation queries the response was YES. [2023-09-01 13:19:09,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43758 conditions, 6382 events. 4364/6382 cut-off events. For 85821/85821 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 32363 event pairs, 1447 based on Foata normal form. 1/6383 useless extension candidates. Maximal degree in co-relation 43096. Up to 6126 conditions per place. [2023-09-01 13:19:09,223 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 414 selfloop transitions, 96 changer transitions 1/511 dead transitions. [2023-09-01 13:19:09,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 511 transitions, 8961 flow [2023-09-01 13:19:09,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:19:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:19:09,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3085 transitions. [2023-09-01 13:19:09,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3769550342130987 [2023-09-01 13:19:09,227 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3085 transitions. [2023-09-01 13:19:09,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3085 transitions. [2023-09-01 13:19:09,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:19:09,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3085 transitions. [2023-09-01 13:19:09,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 257.0833333333333) internal successors, (3085), 12 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:09,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:09,235 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:09,236 INFO L175 Difference]: Start difference. First operand has 251 places, 472 transitions, 7434 flow. Second operand 12 states and 3085 transitions. [2023-09-01 13:19:09,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 511 transitions, 8961 flow [2023-09-01 13:19:09,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 511 transitions, 8678 flow, removed 71 selfloop flow, removed 3 redundant places. [2023-09-01 13:19:09,579 INFO L231 Difference]: Finished difference. Result has 261 places, 481 transitions, 7674 flow [2023-09-01 13:19:09,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=7151, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7674, PETRI_PLACES=261, PETRI_TRANSITIONS=481} [2023-09-01 13:19:09,580 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 229 predicate places. [2023-09-01 13:19:09,580 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 481 transitions, 7674 flow [2023-09-01 13:19:09,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 252.2608695652174) internal successors, (5802), 23 states have internal predecessors, (5802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:09,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:19:09,581 INFO L208 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] [2023-09-01 13:19:09,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-09-01 13:19:09,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:19:09,787 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:19:09,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:19:09,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1232615370, now seen corresponding path program 26 times [2023-09-01 13:19:09,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:19:09,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422147464] [2023-09-01 13:19:09,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:19:09,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:19:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:19:10,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:19:10,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:19:10,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422147464] [2023-09-01 13:19:10,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422147464] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:19:10,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666479781] [2023-09-01 13:19:10,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:19:10,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:19:10,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:19:10,545 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:19:10,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 13:19:10,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:19:10,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:19:10,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-09-01 13:19:10,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:19:10,807 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 13:19:10,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 13:19:10,848 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 13:19:10,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 13:19:10,900 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-09-01 13:19:10,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 13:19:11,123 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 13:19:11,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2023-09-01 13:19:11,265 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:19:11,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2023-09-01 13:19:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:19:11,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:19:11,409 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:19:11,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 215 [2023-09-01 13:19:12,196 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:19:12,197 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:19:12,247 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-09-01 13:19:12,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 65 [2023-09-01 13:19:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:19:12,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666479781] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:19:12,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:19:12,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-09-01 13:19:12,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5527923] [2023-09-01 13:19:12,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:19:12,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 13:19:12,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:19:12,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 13:19:12,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-09-01 13:19:13,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 682 [2023-09-01 13:19:13,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 481 transitions, 7674 flow. Second operand has 23 states, 23 states have (on average 252.2608695652174) internal successors, (5802), 23 states have internal predecessors, (5802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:13,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:19:13,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 682 [2023-09-01 13:19:13,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:19:15,418 INFO L130 PetriNetUnfolder]: 4444/6499 cut-off events. [2023-09-01 13:19:15,419 INFO L131 PetriNetUnfolder]: For 92541/92541 co-relation queries the response was YES. [2023-09-01 13:19:15,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44651 conditions, 6499 events. 4444/6499 cut-off events. For 92541/92541 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 33120 event pairs, 1483 based on Foata normal form. 1/6500 useless extension candidates. Maximal degree in co-relation 43987. Up to 6253 conditions per place. [2023-09-01 13:19:15,477 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 418 selfloop transitions, 96 changer transitions 1/515 dead transitions. [2023-09-01 13:19:15,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 515 transitions, 9142 flow [2023-09-01 13:19:15,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:19:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:19:15,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3083 transitions. [2023-09-01 13:19:15,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767106549364614 [2023-09-01 13:19:15,480 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3083 transitions. [2023-09-01 13:19:15,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3083 transitions. [2023-09-01 13:19:15,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:19:15,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3083 transitions. [2023-09-01 13:19:15,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 256.9166666666667) internal successors, (3083), 12 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:15,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:15,486 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:15,486 INFO L175 Difference]: Start difference. First operand has 261 places, 481 transitions, 7674 flow. Second operand 12 states and 3083 transitions. [2023-09-01 13:19:15,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 515 transitions, 9142 flow [2023-09-01 13:19:15,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 515 transitions, 8755 flow, removed 140 selfloop flow, removed 7 redundant places. [2023-09-01 13:19:15,825 INFO L231 Difference]: Finished difference. Result has 267 places, 487 transitions, 7753 flow [2023-09-01 13:19:15,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=7287, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7753, PETRI_PLACES=267, PETRI_TRANSITIONS=487} [2023-09-01 13:19:15,826 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 235 predicate places. [2023-09-01 13:19:15,827 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 487 transitions, 7753 flow [2023-09-01 13:19:15,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 252.2608695652174) internal successors, (5802), 23 states have internal predecessors, (5802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:15,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:19:15,828 INFO L208 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] [2023-09-01 13:19:15,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-09-01 13:19:16,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:19:16,034 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:19:16,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:19:16,034 INFO L85 PathProgramCache]: Analyzing trace with hash 697495096, now seen corresponding path program 27 times [2023-09-01 13:19:16,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:19:16,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388729478] [2023-09-01 13:19:16,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:19:16,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:19:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:19:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:19:16,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:19:16,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388729478] [2023-09-01 13:19:16,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388729478] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:19:16,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467374276] [2023-09-01 13:19:16,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:19:16,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:19:16,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:19:16,652 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:19:16,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 13:19:16,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 13:19:16,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:19:16,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 94 conjunts are in the unsatisfiable core [2023-09-01 13:19:16,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:19:16,883 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 13:19:16,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 13:19:16,917 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-09-01 13:19:16,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-09-01 13:19:16,957 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:19:16,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-09-01 13:19:17,168 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-09-01 13:19:17,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-09-01 13:19:17,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:19:17,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-09-01 13:19:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:19:17,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:19:18,042 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:19:18,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 134 [2023-09-01 13:19:18,216 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:19:18,238 INFO L321 Elim1Store]: treesize reduction 65, result has 23.5 percent of original size [2023-09-01 13:19:18,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 30 [2023-09-01 13:19:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:19:18,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467374276] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:19:18,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:19:18,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-09-01 13:19:18,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083231211] [2023-09-01 13:19:18,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:19:18,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 13:19:18,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:19:18,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 13:19:18,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2023-09-01 13:19:20,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 682 [2023-09-01 13:19:20,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 487 transitions, 7753 flow. Second operand has 22 states, 22 states have (on average 252.27272727272728) internal successors, (5550), 22 states have internal predecessors, (5550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:20,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:19:20,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 682 [2023-09-01 13:19:20,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:19:22,116 INFO L130 PetriNetUnfolder]: 4524/6616 cut-off events. [2023-09-01 13:19:22,116 INFO L131 PetriNetUnfolder]: For 98196/98196 co-relation queries the response was YES. [2023-09-01 13:19:22,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45439 conditions, 6616 events. 4524/6616 cut-off events. For 98196/98196 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 33850 event pairs, 1521 based on Foata normal form. 1/6617 useless extension candidates. Maximal degree in co-relation 44772. Up to 6370 conditions per place. [2023-09-01 13:19:22,183 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 425 selfloop transitions, 95 changer transitions 1/521 dead transitions. [2023-09-01 13:19:22,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 521 transitions, 9247 flow [2023-09-01 13:19:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 13:19:22,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 13:19:22,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2833 transitions. [2023-09-01 13:19:22,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3776326312983204 [2023-09-01 13:19:22,185 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2833 transitions. [2023-09-01 13:19:22,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2833 transitions. [2023-09-01 13:19:22,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:19:22,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2833 transitions. [2023-09-01 13:19:22,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 257.54545454545456) internal successors, (2833), 11 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:22,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:22,190 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:22,190 INFO L175 Difference]: Start difference. First operand has 267 places, 487 transitions, 7753 flow. Second operand 11 states and 2833 transitions. [2023-09-01 13:19:22,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 521 transitions, 9247 flow [2023-09-01 13:19:22,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 521 transitions, 8908 flow, removed 117 selfloop flow, removed 7 redundant places. [2023-09-01 13:19:22,533 INFO L231 Difference]: Finished difference. Result has 272 places, 493 transitions, 7890 flow [2023-09-01 13:19:22,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=7414, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7890, PETRI_PLACES=272, PETRI_TRANSITIONS=493} [2023-09-01 13:19:22,534 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 240 predicate places. [2023-09-01 13:19:22,535 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 493 transitions, 7890 flow [2023-09-01 13:19:22,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 252.27272727272728) internal successors, (5550), 22 states have internal predecessors, (5550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:22,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:19:22,536 INFO L208 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] [2023-09-01 13:19:22,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-09-01 13:19:22,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-09-01 13:19:22,739 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:19:22,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:19:22,739 INFO L85 PathProgramCache]: Analyzing trace with hash -989489866, now seen corresponding path program 28 times [2023-09-01 13:19:22,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:19:22,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082213668] [2023-09-01 13:19:22,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:19:22,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:19:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:19:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:19:23,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:19:23,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082213668] [2023-09-01 13:19:23,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082213668] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:19:23,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743761602] [2023-09-01 13:19:23,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:19:23,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:19:23,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:19:23,594 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:19:23,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 13:19:23,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:19:23,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:19:23,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 13:19:23,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:19:23,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:19:23,847 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:19:23,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-09-01 13:19:24,094 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-09-01 13:19:24,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-09-01 13:19:24,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:19:24,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-09-01 13:19:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:19:24,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:19:25,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:19:25,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 134 [2023-09-01 13:19:25,396 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:19:25,418 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-09-01 13:19:25,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2023-09-01 13:19:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:19:25,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743761602] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:19:25,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:19:25,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 25 [2023-09-01 13:19:25,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719463687] [2023-09-01 13:19:25,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:19:25,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 13:19:25,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:19:25,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 13:19:25,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2023-09-01 13:19:27,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:19:30,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:19:31,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:19:35,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:19:39,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:19:41,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:19:45,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 682 [2023-09-01 13:19:45,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 493 transitions, 7890 flow. Second operand has 27 states, 27 states have (on average 238.2962962962963) internal successors, (6434), 27 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:45,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:19:45,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 682 [2023-09-01 13:19:45,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:19:47,620 INFO L130 PetriNetUnfolder]: 4626/6765 cut-off events. [2023-09-01 13:19:47,621 INFO L131 PetriNetUnfolder]: For 102784/102784 co-relation queries the response was YES. [2023-09-01 13:19:47,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46735 conditions, 6765 events. 4626/6765 cut-off events. For 102784/102784 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 34772 event pairs, 1557 based on Foata normal form. 1/6766 useless extension candidates. Maximal degree in co-relation 46065. Up to 6505 conditions per place. [2023-09-01 13:19:47,709 INFO L137 encePairwiseOnDemand]: 668/682 looper letters, 434 selfloop transitions, 99 changer transitions 1/534 dead transitions. [2023-09-01 13:19:47,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 534 transitions, 9527 flow [2023-09-01 13:19:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:19:47,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:19:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3158 transitions. [2023-09-01 13:19:47,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3561921949018723 [2023-09-01 13:19:47,711 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3158 transitions. [2023-09-01 13:19:47,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3158 transitions. [2023-09-01 13:19:47,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:19:47,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3158 transitions. [2023-09-01 13:19:47,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 242.92307692307693) internal successors, (3158), 13 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:47,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:47,718 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:47,718 INFO L175 Difference]: Start difference. First operand has 272 places, 493 transitions, 7890 flow. Second operand 13 states and 3158 transitions. [2023-09-01 13:19:47,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 534 transitions, 9527 flow [2023-09-01 13:19:48,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 534 transitions, 9171 flow, removed 123 selfloop flow, removed 7 redundant places. [2023-09-01 13:19:48,290 INFO L231 Difference]: Finished difference. Result has 280 places, 502 transitions, 8120 flow [2023-09-01 13:19:48,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=7534, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8120, PETRI_PLACES=280, PETRI_TRANSITIONS=502} [2023-09-01 13:19:48,291 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 248 predicate places. [2023-09-01 13:19:48,291 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 502 transitions, 8120 flow [2023-09-01 13:19:48,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 238.2962962962963) internal successors, (6434), 27 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:48,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:19:48,292 INFO L208 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] [2023-09-01 13:19:48,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-09-01 13:19:48,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:19:48,494 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:19:48,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:19:48,494 INFO L85 PathProgramCache]: Analyzing trace with hash -789300812, now seen corresponding path program 29 times [2023-09-01 13:19:48,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:19:48,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282618214] [2023-09-01 13:19:48,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:19:48,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:19:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:19:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:19:49,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:19:49,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282618214] [2023-09-01 13:19:49,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282618214] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:19:49,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833432561] [2023-09-01 13:19:49,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:19:49,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:19:49,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:19:49,253 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:19:49,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-09-01 13:19:49,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:19:49,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:19:49,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 77 conjunts are in the unsatisfiable core [2023-09-01 13:19:49,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:19:49,716 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:19:49,716 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 23 [2023-09-01 13:19:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:19:49,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:19:49,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:19:49,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95 [2023-09-01 13:19:49,956 INFO L321 Elim1Store]: treesize reduction 65, result has 23.5 percent of original size [2023-09-01 13:19:49,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 30 [2023-09-01 13:19:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:19:50,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833432561] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:19:50,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:19:50,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 14 [2023-09-01 13:19:50,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664590982] [2023-09-01 13:19:50,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:19:50,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 13:19:50,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:19:50,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 13:19:50,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-09-01 13:19:50,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-09-01 13:19:50,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 502 transitions, 8120 flow. Second operand has 16 states, 16 states have (on average 265.1875) internal successors, (4243), 16 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:50,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:19:50,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-09-01 13:19:50,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:19:52,294 INFO L130 PetriNetUnfolder]: 4716/6898 cut-off events. [2023-09-01 13:19:52,294 INFO L131 PetriNetUnfolder]: For 107580/107580 co-relation queries the response was YES. [2023-09-01 13:19:52,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47569 conditions, 6898 events. 4716/6898 cut-off events. For 107580/107580 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 35565 event pairs, 1606 based on Foata normal form. 1/6899 useless extension candidates. Maximal degree in co-relation 46895. Up to 6634 conditions per place. [2023-09-01 13:19:52,403 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 450 selfloop transitions, 91 changer transitions 1/542 dead transitions. [2023-09-01 13:19:52,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 542 transitions, 9612 flow [2023-09-01 13:19:52,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:19:52,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:19:52,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2447 transitions. [2023-09-01 13:19:52,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39866405995438253 [2023-09-01 13:19:52,406 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2447 transitions. [2023-09-01 13:19:52,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2447 transitions. [2023-09-01 13:19:52,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:19:52,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2447 transitions. [2023-09-01 13:19:52,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 271.8888888888889) internal successors, (2447), 9 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:52,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:52,411 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:52,411 INFO L175 Difference]: Start difference. First operand has 280 places, 502 transitions, 8120 flow. Second operand 9 states and 2447 transitions. [2023-09-01 13:19:52,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 542 transitions, 9612 flow [2023-09-01 13:19:52,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 542 transitions, 9264 flow, removed 128 selfloop flow, removed 7 redundant places. [2023-09-01 13:19:52,810 INFO L231 Difference]: Finished difference. Result has 283 places, 508 transitions, 8167 flow [2023-09-01 13:19:52,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=7772, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8167, PETRI_PLACES=283, PETRI_TRANSITIONS=508} [2023-09-01 13:19:52,811 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 251 predicate places. [2023-09-01 13:19:52,811 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 508 transitions, 8167 flow [2023-09-01 13:19:52,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 265.1875) internal successors, (4243), 16 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:52,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:19:52,812 INFO L208 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] [2023-09-01 13:19:52,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-09-01 13:19:53,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:19:53,012 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:19:53,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:19:53,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1005614046, now seen corresponding path program 30 times [2023-09-01 13:19:53,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:19:53,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931719009] [2023-09-01 13:19:53,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:19:53,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:19:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:19:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:19:53,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:19:53,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931719009] [2023-09-01 13:19:53,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931719009] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:19:53,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859230900] [2023-09-01 13:19:53,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:19:53,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:19:53,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:19:53,718 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:19:53,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-09-01 13:19:53,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:19:53,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:19:53,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-09-01 13:19:53,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:19:53,951 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 13:19:53,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 13:19:53,981 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 13:19:53,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 13:19:54,015 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-09-01 13:19:54,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 13:19:54,167 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 13:19:54,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2023-09-01 13:19:54,339 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:19:54,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2023-09-01 13:19:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:19:54,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:19:54,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:19:54,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 191 [2023-09-01 13:19:56,014 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:19:56,015 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:19:56,065 INFO L321 Elim1Store]: treesize reduction 26, result has 66.2 percent of original size [2023-09-01 13:19:56,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 61 [2023-09-01 13:19:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:19:56,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859230900] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:19:56,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:19:56,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-09-01 13:19:56,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206545709] [2023-09-01 13:19:56,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:19:56,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 13:19:56,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:19:56,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 13:19:56,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-09-01 13:19:58,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 682 [2023-09-01 13:19:58,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 508 transitions, 8167 flow. Second operand has 24 states, 24 states have (on average 252.20833333333334) internal successors, (6053), 24 states have internal predecessors, (6053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:58,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:19:58,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 682 [2023-09-01 13:19:58,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:20:00,221 INFO L130 PetriNetUnfolder]: 4834/7069 cut-off events. [2023-09-01 13:20:00,222 INFO L131 PetriNetUnfolder]: For 114666/114666 co-relation queries the response was YES. [2023-09-01 13:20:00,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48958 conditions, 7069 events. 4834/7069 cut-off events. For 114666/114666 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 36609 event pairs, 1634 based on Foata normal form. 1/7070 useless extension candidates. Maximal degree in co-relation 48281. Up to 6785 conditions per place. [2023-09-01 13:20:00,290 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 448 selfloop transitions, 101 changer transitions 1/550 dead transitions. [2023-09-01 13:20:00,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 550 transitions, 9919 flow [2023-09-01 13:20:00,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:20:00,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:20:00,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3085 transitions. [2023-09-01 13:20:00,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3769550342130987 [2023-09-01 13:20:00,292 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3085 transitions. [2023-09-01 13:20:00,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3085 transitions. [2023-09-01 13:20:00,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:20:00,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3085 transitions. [2023-09-01 13:20:00,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 257.0833333333333) internal successors, (3085), 12 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:20:00,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:20:00,298 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:20:00,298 INFO L175 Difference]: Start difference. First operand has 283 places, 508 transitions, 8167 flow. Second operand 12 states and 3085 transitions. [2023-09-01 13:20:00,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 550 transitions, 9919 flow [2023-09-01 13:20:00,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 550 transitions, 9585 flow, removed 80 selfloop flow, removed 6 redundant places. [2023-09-01 13:20:00,653 INFO L231 Difference]: Finished difference. Result has 290 places, 521 transitions, 8546 flow [2023-09-01 13:20:00,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=7833, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8546, PETRI_PLACES=290, PETRI_TRANSITIONS=521} [2023-09-01 13:20:00,654 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 258 predicate places. [2023-09-01 13:20:00,655 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 521 transitions, 8546 flow [2023-09-01 13:20:00,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 252.20833333333334) internal successors, (6053), 24 states have internal predecessors, (6053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:20:00,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:20:00,656 INFO L208 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] [2023-09-01 13:20:00,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-09-01 13:20:00,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-09-01 13:20:00,856 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:20:00,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:20:00,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1507910754, now seen corresponding path program 31 times [2023-09-01 13:20:00,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:20:00,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120390489] [2023-09-01 13:20:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:20:00,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:20:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:20:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:20:01,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:20:01,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120390489] [2023-09-01 13:20:01,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120390489] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:20:01,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681222978] [2023-09-01 13:20:01,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:20:01,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:20:01,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:20:01,773 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:20:01,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-09-01 13:20:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:20:01,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 13:20:01,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:20:01,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:20:02,028 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:20:02,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-09-01 13:20:02,225 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-09-01 13:20:02,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-09-01 13:20:02,453 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:20:02,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-09-01 13:20:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:20:02,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:20:03,750 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:20:03,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 118 [2023-09-01 13:20:04,089 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:20:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:20:04,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681222978] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:20:04,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:20:04,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 27 [2023-09-01 13:20:04,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817081373] [2023-09-01 13:20:04,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:20:04,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 13:20:04,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:20:04,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 13:20:04,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-09-01 13:20:07,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 13:20:09,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:20:12,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:20:18,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:20:20,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:20:22,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 13:20:30,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:20:34,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:20:35,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:20:38,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:20:41,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:20:41,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 682 [2023-09-01 13:20:41,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 521 transitions, 8546 flow. Second operand has 29 states, 29 states have (on average 231.13793103448276) internal successors, (6703), 29 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:20:41,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:20:41,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 682 [2023-09-01 13:20:41,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:20:44,683 INFO L130 PetriNetUnfolder]: 5189/7587 cut-off events. [2023-09-01 13:20:44,683 INFO L131 PetriNetUnfolder]: For 135645/135645 co-relation queries the response was YES. [2023-09-01 13:20:44,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56006 conditions, 7587 events. 5189/7587 cut-off events. For 135645/135645 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 39657 event pairs, 1655 based on Foata normal form. 1/7588 useless extension candidates. Maximal degree in co-relation 55327. Up to 7021 conditions per place. [2023-09-01 13:20:44,787 INFO L137 encePairwiseOnDemand]: 668/682 looper letters, 504 selfloop transitions, 210 changer transitions 1/715 dead transitions. [2023-09-01 13:20:44,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 715 transitions, 13764 flow [2023-09-01 13:20:44,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 13:20:44,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 13:20:44,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 6367 transitions. [2023-09-01 13:20:44,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34576952318887805 [2023-09-01 13:20:44,792 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 6367 transitions. [2023-09-01 13:20:44,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 6367 transitions. [2023-09-01 13:20:44,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:20:44,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 6367 transitions. [2023-09-01 13:20:44,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 235.8148148148148) internal successors, (6367), 27 states have internal predecessors, (6367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:20:44,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 682.0) internal successors, (19096), 28 states have internal predecessors, (19096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:20:44,806 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 682.0) internal successors, (19096), 28 states have internal predecessors, (19096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:20:44,806 INFO L175 Difference]: Start difference. First operand has 290 places, 521 transitions, 8546 flow. Second operand 27 states and 6367 transitions. [2023-09-01 13:20:44,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 715 transitions, 13764 flow [2023-09-01 13:20:45,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 715 transitions, 13119 flow, removed 215 selfloop flow, removed 6 redundant places. [2023-09-01 13:20:45,339 INFO L231 Difference]: Finished difference. Result has 316 places, 624 transitions, 11448 flow [2023-09-01 13:20:45,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=8013, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11448, PETRI_PLACES=316, PETRI_TRANSITIONS=624} [2023-09-01 13:20:45,340 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 284 predicate places. [2023-09-01 13:20:45,340 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 624 transitions, 11448 flow [2023-09-01 13:20:45,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 231.13793103448276) internal successors, (6703), 29 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:20:45,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:20:45,341 INFO L208 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] [2023-09-01 13:20:45,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-09-01 13:20:45,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-09-01 13:20:45,541 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:20:45,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:20:45,542 INFO L85 PathProgramCache]: Analyzing trace with hash 969360588, now seen corresponding path program 32 times [2023-09-01 13:20:45,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:20:45,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599651818] [2023-09-01 13:20:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:20:45,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:20:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:20:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:20:46,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:20:46,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599651818] [2023-09-01 13:20:46,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599651818] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:20:46,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975779988] [2023-09-01 13:20:46,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:20:46,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:20:46,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:20:46,731 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:20:46,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-09-01 13:20:46,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:20:46,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:20:46,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-09-01 13:20:46,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:20:46,972 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 13:20:46,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 13:20:47,018 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 13:20:47,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 13:20:47,077 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-09-01 13:20:47,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 13:20:47,253 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 13:20:47,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2023-09-01 13:20:47,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:20:47,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2023-09-01 13:20:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:20:47,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:20:47,620 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:20:47,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 191 [2023-09-01 13:20:48,432 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:20:48,433 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:20:48,482 INFO L321 Elim1Store]: treesize reduction 26, result has 66.2 percent of original size [2023-09-01 13:20:48,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 61 [2023-09-01 13:20:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:20:48,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975779988] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:20:48,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:20:48,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2023-09-01 13:20:48,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101152585] [2023-09-01 13:20:48,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:20:48,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 13:20:48,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:20:48,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 13:20:48,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2023-09-01 13:20:52,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 682 [2023-09-01 13:20:52,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 624 transitions, 11448 flow. Second operand has 30 states, 30 states have (on average 233.2) internal successors, (6996), 30 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:20:52,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:20:52,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 682 [2023-09-01 13:20:52,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:20:56,536 INFO L130 PetriNetUnfolder]: 5754/8411 cut-off events. [2023-09-01 13:20:56,536 INFO L131 PetriNetUnfolder]: For 161517/161517 co-relation queries the response was YES. [2023-09-01 13:20:56,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68307 conditions, 8411 events. 5754/8411 cut-off events. For 161517/161517 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 44235 event pairs, 1733 based on Foata normal form. 1/8412 useless extension candidates. Maximal degree in co-relation 67621. Up to 7539 conditions per place. [2023-09-01 13:20:56,641 INFO L137 encePairwiseOnDemand]: 669/682 looper letters, 518 selfloop transitions, 378 changer transitions 1/897 dead transitions. [2023-09-01 13:20:56,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 897 transitions, 19727 flow [2023-09-01 13:20:56,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 13:20:56,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 13:20:56,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 6646 transitions. [2023-09-01 13:20:56,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3480310012568077 [2023-09-01 13:20:56,647 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 6646 transitions. [2023-09-01 13:20:56,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 6646 transitions. [2023-09-01 13:20:56,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:20:56,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 6646 transitions. [2023-09-01 13:20:56,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 237.35714285714286) internal successors, (6646), 28 states have internal predecessors, (6646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:20:56,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 682.0) internal successors, (19778), 29 states have internal predecessors, (19778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:20:56,671 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 682.0) internal successors, (19778), 29 states have internal predecessors, (19778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:20:56,671 INFO L175 Difference]: Start difference. First operand has 316 places, 624 transitions, 11448 flow. Second operand 28 states and 6646 transitions. [2023-09-01 13:20:56,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 897 transitions, 19727 flow [2023-09-01 13:20:57,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 897 transitions, 18925 flow, removed 214 selfloop flow, removed 6 redundant places. [2023-09-01 13:20:57,399 INFO L231 Difference]: Finished difference. Result has 342 places, 807 transitions, 17124 flow [2023-09-01 13:20:57,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=10829, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=17124, PETRI_PLACES=342, PETRI_TRANSITIONS=807} [2023-09-01 13:20:57,400 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 310 predicate places. [2023-09-01 13:20:57,400 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 807 transitions, 17124 flow [2023-09-01 13:20:57,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 233.2) internal successors, (6996), 30 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:20:57,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:20:57,401 INFO L208 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] [2023-09-01 13:20:57,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-09-01 13:20:57,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-09-01 13:20:57,607 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:20:57,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:20:57,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1329023202, now seen corresponding path program 33 times [2023-09-01 13:20:57,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:20:57,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423435791] [2023-09-01 13:20:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:20:57,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:20:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:20:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:20:58,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:20:58,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423435791] [2023-09-01 13:20:58,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423435791] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:20:58,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332807973] [2023-09-01 13:20:58,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:20:58,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:20:58,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:20:58,252 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:20:58,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-09-01 13:20:58,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 13:20:58,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:20:58,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-09-01 13:20:58,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:20:58,499 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 13:20:58,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 13:20:58,528 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 13:20:58,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 13:20:58,564 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-09-01 13:20:58,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 13:20:58,708 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 13:20:58,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2023-09-01 13:20:58,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:20:58,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2023-09-01 13:20:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:20:58,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:20:59,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:20:59,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 191 [2023-09-01 13:21:00,273 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:21:00,274 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:21:00,324 INFO L321 Elim1Store]: treesize reduction 26, result has 66.2 percent of original size [2023-09-01 13:21:00,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 61 [2023-09-01 13:21:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:21:00,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332807973] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:21:00,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:21:00,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-09-01 13:21:00,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260529711] [2023-09-01 13:21:00,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:21:00,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 13:21:00,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:21:00,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 13:21:00,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-09-01 13:21:02,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 682 [2023-09-01 13:21:02,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 807 transitions, 17124 flow. Second operand has 24 states, 24 states have (on average 252.20833333333334) internal successors, (6053), 24 states have internal predecessors, (6053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:21:02,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:21:02,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 682 [2023-09-01 13:21:02,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:21:04,507 INFO L130 PetriNetUnfolder]: 5834/8528 cut-off events. [2023-09-01 13:21:04,507 INFO L131 PetriNetUnfolder]: For 162003/162003 co-relation queries the response was YES. [2023-09-01 13:21:04,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69139 conditions, 8528 events. 5834/8528 cut-off events. For 162003/162003 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 45024 event pairs, 1817 based on Foata normal form. 1/8529 useless extension candidates. Maximal degree in co-relation 68447. Up to 7762 conditions per place. [2023-09-01 13:21:04,608 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 480 selfloop transitions, 359 changer transitions 1/840 dead transitions. [2023-09-01 13:21:04,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 840 transitions, 19295 flow [2023-09-01 13:21:04,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:21:04,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:21:04,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3083 transitions. [2023-09-01 13:21:04,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767106549364614 [2023-09-01 13:21:04,610 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3083 transitions. [2023-09-01 13:21:04,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3083 transitions. [2023-09-01 13:21:04,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:21:04,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3083 transitions. [2023-09-01 13:21:04,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 256.9166666666667) internal successors, (3083), 12 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:21:04,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:21:04,616 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:21:04,616 INFO L175 Difference]: Start difference. First operand has 342 places, 807 transitions, 17124 flow. Second operand 12 states and 3083 transitions. [2023-09-01 13:21:04,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 840 transitions, 19295 flow [2023-09-01 13:21:05,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 840 transitions, 18766 flow, removed 226 selfloop flow, removed 6 redundant places. [2023-09-01 13:21:05,353 INFO L231 Difference]: Finished difference. Result has 349 places, 813 transitions, 17661 flow [2023-09-01 13:21:05,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=16595, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=807, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=355, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17661, PETRI_PLACES=349, PETRI_TRANSITIONS=813} [2023-09-01 13:21:05,355 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 317 predicate places. [2023-09-01 13:21:05,355 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 813 transitions, 17661 flow [2023-09-01 13:21:05,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 252.20833333333334) internal successors, (6053), 24 states have internal predecessors, (6053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:21:05,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:21:05,356 INFO L208 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] [2023-09-01 13:21:05,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-09-01 13:21:05,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-09-01 13:21:05,562 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:21:05,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:21:05,563 INFO L85 PathProgramCache]: Analyzing trace with hash -2008673002, now seen corresponding path program 34 times [2023-09-01 13:21:05,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:21:05,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869216929] [2023-09-01 13:21:05,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:21:05,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:21:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:21:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:21:06,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:21:06,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869216929] [2023-09-01 13:21:06,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869216929] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:21:06,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228641420] [2023-09-01 13:21:06,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:21:06,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:21:06,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:21:06,296 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:21:06,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-09-01 13:21:06,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:21:06,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:21:06,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 89 conjunts are in the unsatisfiable core [2023-09-01 13:21:06,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:21:06,530 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 13:21:06,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 13:21:06,576 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-09-01 13:21:06,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-09-01 13:21:06,618 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:21:06,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-09-01 13:21:06,796 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-09-01 13:21:06,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-09-01 13:21:06,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:21:06,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 94 [2023-09-01 13:21:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:21:07,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:21:07,369 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:21:07,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 134 [2023-09-01 13:21:07,510 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:21:07,532 INFO L321 Elim1Store]: treesize reduction 65, result has 23.5 percent of original size [2023-09-01 13:21:07,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 30 [2023-09-01 13:21:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:21:07,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228641420] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:21:07,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:21:07,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-09-01 13:21:07,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597827165] [2023-09-01 13:21:07,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:21:07,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 13:21:07,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:21:07,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 13:21:07,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-09-01 13:21:09,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 682 [2023-09-01 13:21:09,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 813 transitions, 17661 flow. Second operand has 24 states, 24 states have (on average 252.29166666666666) internal successors, (6055), 24 states have internal predecessors, (6055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:21:09,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:21:09,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 682 [2023-09-01 13:21:09,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:21:12,333 INFO L130 PetriNetUnfolder]: 5914/8645 cut-off events. [2023-09-01 13:21:12,333 INFO L131 PetriNetUnfolder]: For 161639/161639 co-relation queries the response was YES. [2023-09-01 13:21:12,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69916 conditions, 8645 events. 5914/8645 cut-off events. For 161639/161639 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 45793 event pairs, 1858 based on Foata normal form. 1/8646 useless extension candidates. Maximal degree in co-relation 69221. Up to 7943 conditions per place. [2023-09-01 13:21:12,444 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 494 selfloop transitions, 350 changer transitions 1/845 dead transitions. [2023-09-01 13:21:12,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 845 transitions, 19852 flow [2023-09-01 13:21:12,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 13:21:12,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 13:21:12,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2831 transitions. [2023-09-01 13:21:12,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.377366035723807 [2023-09-01 13:21:12,447 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2831 transitions. [2023-09-01 13:21:12,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2831 transitions. [2023-09-01 13:21:12,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:21:12,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2831 transitions. [2023-09-01 13:21:12,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 257.3636363636364) internal successors, (2831), 11 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:21:12,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:21:12,457 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:21:12,457 INFO L175 Difference]: Start difference. First operand has 349 places, 813 transitions, 17661 flow. Second operand 11 states and 2831 transitions. [2023-09-01 13:21:12,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 845 transitions, 19852 flow [2023-09-01 13:21:13,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 845 transitions, 19080 flow, removed 154 selfloop flow, removed 8 redundant places. [2023-09-01 13:21:13,224 INFO L231 Difference]: Finished difference. Result has 353 places, 819 transitions, 17949 flow [2023-09-01 13:21:13,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=16889, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17949, PETRI_PLACES=353, PETRI_TRANSITIONS=819} [2023-09-01 13:21:13,227 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 321 predicate places. [2023-09-01 13:21:13,227 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 819 transitions, 17949 flow [2023-09-01 13:21:13,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 252.29166666666666) internal successors, (6055), 24 states have internal predecessors, (6055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:21:13,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:21:13,228 INFO L208 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] [2023-09-01 13:21:13,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-09-01 13:21:13,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:21:13,434 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:21:13,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:21:13,434 INFO L85 PathProgramCache]: Analyzing trace with hash -568945314, now seen corresponding path program 35 times [2023-09-01 13:21:13,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:21:13,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569092705] [2023-09-01 13:21:13,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:21:13,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:21:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:21:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:21:14,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:21:14,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569092705] [2023-09-01 13:21:14,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569092705] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:21:14,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980028582] [2023-09-01 13:21:14,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:21:14,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:21:14,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:21:14,157 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:21:14,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-09-01 13:21:14,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:21:14,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:21:14,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-09-01 13:21:14,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:21:14,381 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 13:21:14,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 13:21:14,409 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 13:21:14,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 13:21:14,445 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-09-01 13:21:14,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 13:21:14,606 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 13:21:14,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2023-09-01 13:21:14,747 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:21:14,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2023-09-01 13:21:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:21:14,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:21:14,875 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:21:14,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 215 [2023-09-01 13:21:16,063 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:21:16,064 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:21:16,112 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-09-01 13:21:16,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 65 [2023-09-01 13:21:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:21:16,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980028582] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:21:16,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:21:16,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-09-01 13:21:16,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895137740] [2023-09-01 13:21:16,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:21:16,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 13:21:16,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:21:16,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 13:21:16,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-09-01 13:21:18,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 682 [2023-09-01 13:21:18,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 819 transitions, 17949 flow. Second operand has 23 states, 23 states have (on average 252.34782608695653) internal successors, (5804), 23 states have internal predecessors, (5804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:21:18,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:21:18,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 682 [2023-09-01 13:21:18,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:21:21,398 INFO L130 PetriNetUnfolder]: 6004/8776 cut-off events. [2023-09-01 13:21:21,398 INFO L131 PetriNetUnfolder]: For 166600/166600 co-relation queries the response was YES. [2023-09-01 13:21:21,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71344 conditions, 8776 events. 6004/8776 cut-off events. For 166600/166600 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 46609 event pairs, 1891 based on Foata normal form. 1/8777 useless extension candidates. Maximal degree in co-relation 70646. Up to 8074 conditions per place. [2023-09-01 13:21:21,505 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 499 selfloop transitions, 354 changer transitions 1/854 dead transitions. [2023-09-01 13:21:21,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 854 transitions, 20200 flow [2023-09-01 13:21:21,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:21:21,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:21:21,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3081 transitions. [2023-09-01 13:21:21,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37646627565982405 [2023-09-01 13:21:21,508 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3081 transitions. [2023-09-01 13:21:21,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3081 transitions. [2023-09-01 13:21:21,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:21:21,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3081 transitions. [2023-09-01 13:21:21,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 256.75) internal successors, (3081), 12 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:21:21,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:21:21,514 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:21:21,514 INFO L175 Difference]: Start difference. First operand has 353 places, 819 transitions, 17949 flow. Second operand 12 states and 3081 transitions. [2023-09-01 13:21:21,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 854 transitions, 20200 flow [2023-09-01 13:21:22,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 854 transitions, 19452 flow, removed 160 selfloop flow, removed 7 redundant places. [2023-09-01 13:21:22,228 INFO L231 Difference]: Finished difference. Result has 360 places, 828 transitions, 18330 flow [2023-09-01 13:21:22,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=17201, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=18330, PETRI_PLACES=360, PETRI_TRANSITIONS=828} [2023-09-01 13:21:22,229 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 328 predicate places. [2023-09-01 13:21:22,229 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 828 transitions, 18330 flow [2023-09-01 13:21:22,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 252.34782608695653) internal successors, (5804), 23 states have internal predecessors, (5804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:21:22,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:21:22,230 INFO L208 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] [2023-09-01 13:21:22,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-09-01 13:21:22,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-09-01 13:21:22,431 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:21:22,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:21:22,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2034914794, now seen corresponding path program 36 times [2023-09-01 13:21:22,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:21:22,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591338667] [2023-09-01 13:21:22,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:21:22,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:21:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:21:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:21:23,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:21:23,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591338667] [2023-09-01 13:21:23,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591338667] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:21:23,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051052203] [2023-09-01 13:21:23,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:21:23,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:21:23,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:21:23,451 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:21:23,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-09-01 13:21:23,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 13:21:23,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:21:23,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 13:21:23,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:21:23,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:21:23,732 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:21:23,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-09-01 13:21:24,106 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:21:24,107 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:21:24,141 INFO L321 Elim1Store]: treesize reduction 81, result has 28.9 percent of original size [2023-09-01 13:21:24,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 55 [2023-09-01 13:21:24,624 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:21:24,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 153 treesize of output 179 [2023-09-01 13:21:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:21:24,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:21:26,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:21:26,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 118 [2023-09-01 13:21:26,730 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:21:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:21:26,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051052203] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:21:26,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:21:26,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 27 [2023-09-01 13:21:26,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722662989] [2023-09-01 13:21:26,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:21:26,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 13:21:26,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:21:26,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 13:21:26,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-09-01 13:21:31,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:21:36,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:21:45,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:21:51,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 13:21:53,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:21:55,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:21:57,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 682 [2023-09-01 13:21:57,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 828 transitions, 18330 flow. Second operand has 29 states, 29 states have (on average 240.41379310344828) internal successors, (6972), 29 states have internal predecessors, (6972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:21:57,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:21:57,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 682 [2023-09-01 13:21:57,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:22:00,759 INFO L130 PetriNetUnfolder]: 6092/8905 cut-off events. [2023-09-01 13:22:00,759 INFO L131 PetriNetUnfolder]: For 171803/171803 co-relation queries the response was YES. [2023-09-01 13:22:00,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72525 conditions, 8905 events. 6092/8905 cut-off events. For 171803/171803 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 47624 event pairs, 1904 based on Foata normal form. 1/8906 useless extension candidates. Maximal degree in co-relation 71823. Up to 8102 conditions per place. [2023-09-01 13:22:00,872 INFO L137 encePairwiseOnDemand]: 668/682 looper letters, 497 selfloop transitions, 373 changer transitions 1/871 dead transitions. [2023-09-01 13:22:00,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 871 transitions, 20530 flow [2023-09-01 13:22:00,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:22:00,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:22:00,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3186 transitions. [2023-09-01 13:22:00,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35935032709226256 [2023-09-01 13:22:00,874 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3186 transitions. [2023-09-01 13:22:00,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3186 transitions. [2023-09-01 13:22:00,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:22:00,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3186 transitions. [2023-09-01 13:22:00,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 245.07692307692307) internal successors, (3186), 13 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:00,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:00,880 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:00,880 INFO L175 Difference]: Start difference. First operand has 360 places, 828 transitions, 18330 flow. Second operand 13 states and 3186 transitions. [2023-09-01 13:22:00,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 871 transitions, 20530 flow [2023-09-01 13:22:01,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 871 transitions, 19765 flow, removed 170 selfloop flow, removed 7 redundant places. [2023-09-01 13:22:01,559 INFO L231 Difference]: Finished difference. Result has 367 places, 834 transitions, 18567 flow [2023-09-01 13:22:01,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=17565, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=18567, PETRI_PLACES=367, PETRI_TRANSITIONS=834} [2023-09-01 13:22:01,560 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 335 predicate places. [2023-09-01 13:22:01,560 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 834 transitions, 18567 flow [2023-09-01 13:22:01,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 240.41379310344828) internal successors, (6972), 29 states have internal predecessors, (6972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:01,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:22:01,561 INFO L208 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] [2023-09-01 13:22:01,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-09-01 13:22:01,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-09-01 13:22:01,762 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:22:01,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:22:01,762 INFO L85 PathProgramCache]: Analyzing trace with hash 799498386, now seen corresponding path program 37 times [2023-09-01 13:22:01,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:22:01,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592630339] [2023-09-01 13:22:01,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:22:01,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:22:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:22:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:22:02,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:22:02,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592630339] [2023-09-01 13:22:02,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592630339] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:22:02,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646738448] [2023-09-01 13:22:02,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:22:02,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:22:02,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:22:02,385 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:22:02,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-09-01 13:22:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:22:02,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-09-01 13:22:02,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:22:02,842 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:22:02,843 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 23 [2023-09-01 13:22:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:22:02,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:22:03,014 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:22:03,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95 [2023-09-01 13:22:03,174 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-09-01 13:22:03,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2023-09-01 13:22:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:22:03,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646738448] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:22:03,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:22:03,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 14 [2023-09-01 13:22:03,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194892620] [2023-09-01 13:22:03,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:22:03,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 13:22:03,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:22:03,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 13:22:03,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-09-01 13:22:03,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-09-01 13:22:03,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 834 transitions, 18567 flow. Second operand has 16 states, 16 states have (on average 265.1875) internal successors, (4243), 16 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:03,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:22:03,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-09-01 13:22:03,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:22:06,741 INFO L130 PetriNetUnfolder]: 6182/9038 cut-off events. [2023-09-01 13:22:06,741 INFO L131 PetriNetUnfolder]: For 175061/175061 co-relation queries the response was YES. [2023-09-01 13:22:06,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73785 conditions, 9038 events. 6182/9038 cut-off events. For 175061/175061 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 48397 event pairs, 1950 based on Foata normal form. 1/9039 useless extension candidates. Maximal degree in co-relation 73080. Up to 8318 conditions per place. [2023-09-01 13:22:06,850 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 531 selfloop transitions, 340 changer transitions 1/872 dead transitions. [2023-09-01 13:22:06,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 872 transitions, 20748 flow [2023-09-01 13:22:06,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:22:06,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:22:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2445 transitions. [2023-09-01 13:22:06,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39833822091886606 [2023-09-01 13:22:06,852 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2445 transitions. [2023-09-01 13:22:06,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2445 transitions. [2023-09-01 13:22:06,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:22:06,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2445 transitions. [2023-09-01 13:22:06,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 271.6666666666667) internal successors, (2445), 9 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:06,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:06,857 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:06,857 INFO L175 Difference]: Start difference. First operand has 367 places, 834 transitions, 18567 flow. Second operand 9 states and 2445 transitions. [2023-09-01 13:22:06,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 872 transitions, 20748 flow [2023-09-01 13:22:07,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 872 transitions, 19809 flow, removed 101 selfloop flow, removed 10 redundant places. [2023-09-01 13:22:07,555 INFO L231 Difference]: Finished difference. Result has 367 places, 840 transitions, 18575 flow [2023-09-01 13:22:07,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=17628, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18575, PETRI_PLACES=367, PETRI_TRANSITIONS=840} [2023-09-01 13:22:07,556 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 335 predicate places. [2023-09-01 13:22:07,557 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 840 transitions, 18575 flow [2023-09-01 13:22:07,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 265.1875) internal successors, (4243), 16 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:07,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:22:07,557 INFO L208 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] [2023-09-01 13:22:07,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-09-01 13:22:07,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-09-01 13:22:07,758 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:22:07,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:22:07,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1248228834, now seen corresponding path program 38 times [2023-09-01 13:22:07,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:22:07,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351569500] [2023-09-01 13:22:07,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:22:07,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:22:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:22:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:22:08,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:22:08,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351569500] [2023-09-01 13:22:08,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351569500] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:22:08,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43894180] [2023-09-01 13:22:08,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:22:08,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:22:08,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:22:08,678 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:22:08,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-09-01 13:22:08,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:22:08,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:22:08,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-09-01 13:22:08,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:22:08,939 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 13:22:08,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 13:22:08,994 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 13:22:08,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 13:22:09,050 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-09-01 13:22:09,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 13:22:09,238 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 13:22:09,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2023-09-01 13:22:09,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:22:09,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2023-09-01 13:22:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:22:09,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:22:09,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:22:09,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 215 [2023-09-01 13:22:11,150 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:22:11,151 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:22:11,199 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-09-01 13:22:11,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 65 [2023-09-01 13:22:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:22:11,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43894180] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:22:11,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:22:11,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2023-09-01 13:22:11,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024724538] [2023-09-01 13:22:11,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:22:11,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 13:22:11,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:22:11,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 13:22:11,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2023-09-01 13:22:14,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 682 [2023-09-01 13:22:14,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 840 transitions, 18575 flow. Second operand has 29 states, 29 states have (on average 242.3793103448276) internal successors, (7029), 29 states have internal predecessors, (7029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:14,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:22:14,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 682 [2023-09-01 13:22:14,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:22:17,615 INFO L130 PetriNetUnfolder]: 6270/9167 cut-off events. [2023-09-01 13:22:17,615 INFO L131 PetriNetUnfolder]: For 181342/181342 co-relation queries the response was YES. [2023-09-01 13:22:17,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74525 conditions, 9167 events. 6270/9167 cut-off events. For 181342/181342 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 49302 event pairs, 1991 based on Foata normal form. 1/9168 useless extension candidates. Maximal degree in co-relation 73818. Up to 8455 conditions per place. [2023-09-01 13:22:17,816 INFO L137 encePairwiseOnDemand]: 669/682 looper letters, 514 selfloop transitions, 359 changer transitions 1/874 dead transitions. [2023-09-01 13:22:17,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 874 transitions, 20744 flow [2023-09-01 13:22:17,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 13:22:17,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 13:22:17,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3445 transitions. [2023-09-01 13:22:17,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36080854629241726 [2023-09-01 13:22:17,818 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3445 transitions. [2023-09-01 13:22:17,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3445 transitions. [2023-09-01 13:22:17,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:22:17,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3445 transitions. [2023-09-01 13:22:17,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 246.07142857142858) internal successors, (3445), 14 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:17,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 682.0) internal successors, (10230), 15 states have internal predecessors, (10230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:17,825 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 682.0) internal successors, (10230), 15 states have internal predecessors, (10230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:17,825 INFO L175 Difference]: Start difference. First operand has 367 places, 840 transitions, 18575 flow. Second operand 14 states and 3445 transitions. [2023-09-01 13:22:17,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 874 transitions, 20744 flow [2023-09-01 13:22:18,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 874 transitions, 19852 flow, removed 110 selfloop flow, removed 6 redundant places. [2023-09-01 13:22:18,626 INFO L231 Difference]: Finished difference. Result has 376 places, 846 transitions, 18674 flow [2023-09-01 13:22:18,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=17683, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18674, PETRI_PLACES=376, PETRI_TRANSITIONS=846} [2023-09-01 13:22:18,627 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 344 predicate places. [2023-09-01 13:22:18,627 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 846 transitions, 18674 flow [2023-09-01 13:22:18,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 242.3793103448276) internal successors, (7029), 29 states have internal predecessors, (7029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:18,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:22:18,628 INFO L208 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] [2023-09-01 13:22:18,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-09-01 13:22:18,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:22:18,828 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:22:18,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:22:18,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1466756076, now seen corresponding path program 39 times [2023-09-01 13:22:18,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:22:18,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479294152] [2023-09-01 13:22:18,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:22:18,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:22:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:22:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:22:19,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:22:19,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479294152] [2023-09-01 13:22:19,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479294152] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:22:19,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365377522] [2023-09-01 13:22:19,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:22:19,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:22:19,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:22:19,993 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:22:19,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-09-01 13:22:20,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:22:20,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:22:20,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 13:22:20,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:22:20,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:22:20,278 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:22:20,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-09-01 13:22:20,623 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-09-01 13:22:20,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-09-01 13:22:20,822 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:22:20,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-09-01 13:22:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:22:20,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:22:23,279 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:22:23,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 134 [2023-09-01 13:22:23,598 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:22:23,621 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-09-01 13:22:23,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2023-09-01 13:22:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:22:23,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365377522] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:22:23,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:22:23,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 30 [2023-09-01 13:22:23,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250345719] [2023-09-01 13:22:23,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:22:23,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 13:22:23,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:22:23,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 13:22:23,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=856, Unknown=1, NotChecked=0, Total=992 [2023-09-01 13:22:28,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:22:29,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:22:36,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:22:38,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:22:45,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 682 [2023-09-01 13:22:45,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 846 transitions, 18674 flow. Second operand has 32 states, 32 states have (on average 227.25) internal successors, (7272), 32 states have internal predecessors, (7272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:45,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:22:45,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 682 [2023-09-01 13:22:45,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:22:50,725 INFO L130 PetriNetUnfolder]: 6358/9296 cut-off events. [2023-09-01 13:22:50,725 INFO L131 PetriNetUnfolder]: For 186703/186703 co-relation queries the response was YES. [2023-09-01 13:22:50,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75295 conditions, 9296 events. 6358/9296 cut-off events. For 186703/186703 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 50306 event pairs, 2029 based on Foata normal form. 1/9297 useless extension candidates. Maximal degree in co-relation 74587. Up to 8580 conditions per place. [2023-09-01 13:22:50,841 INFO L137 encePairwiseOnDemand]: 668/682 looper letters, 576 selfloop transitions, 362 changer transitions 1/939 dead transitions. [2023-09-01 13:22:50,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 939 transitions, 21518 flow [2023-09-01 13:22:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 13:22:50,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 13:22:50,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 7390 transitions. [2023-09-01 13:22:50,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33861803519061584 [2023-09-01 13:22:50,846 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 7390 transitions. [2023-09-01 13:22:50,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 7390 transitions. [2023-09-01 13:22:50,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:22:50,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 7390 transitions. [2023-09-01 13:22:50,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 230.9375) internal successors, (7390), 32 states have internal predecessors, (7390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:50,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 682.0) internal successors, (22506), 33 states have internal predecessors, (22506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:50,860 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 682.0) internal successors, (22506), 33 states have internal predecessors, (22506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:50,861 INFO L175 Difference]: Start difference. First operand has 376 places, 846 transitions, 18674 flow. Second operand 32 states and 7390 transitions. [2023-09-01 13:22:50,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 939 transitions, 21518 flow [2023-09-01 13:22:51,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 939 transitions, 20582 flow, removed 110 selfloop flow, removed 11 redundant places. [2023-09-01 13:22:51,562 INFO L231 Difference]: Finished difference. Result has 398 places, 854 transitions, 18785 flow [2023-09-01 13:22:51,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=17744, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=18785, PETRI_PLACES=398, PETRI_TRANSITIONS=854} [2023-09-01 13:22:51,563 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 366 predicate places. [2023-09-01 13:22:51,563 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 854 transitions, 18785 flow [2023-09-01 13:22:51,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 227.25) internal successors, (7272), 32 states have internal predecessors, (7272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:51,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:22:51,564 INFO L208 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] [2023-09-01 13:22:51,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-09-01 13:22:51,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:22:51,765 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:22:51,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:22:51,765 INFO L85 PathProgramCache]: Analyzing trace with hash 517883682, now seen corresponding path program 40 times [2023-09-01 13:22:51,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:22:51,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364302409] [2023-09-01 13:22:51,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:22:51,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:22:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:22:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:22:52,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:22:52,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364302409] [2023-09-01 13:22:52,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364302409] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:22:52,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065961793] [2023-09-01 13:22:52,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:22:52,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:22:52,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:22:52,934 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:22:52,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-09-01 13:22:53,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:22:53,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:22:53,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 90 conjunts are in the unsatisfiable core [2023-09-01 13:22:53,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:22:53,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:22:53,245 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:22:53,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-09-01 13:22:53,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:22:53,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:22:53,610 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:22:53,630 INFO L321 Elim1Store]: treesize reduction 67, result has 22.1 percent of original size [2023-09-01 13:22:53,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 38 [2023-09-01 13:22:53,813 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:22:53,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 94 [2023-09-01 13:22:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:22:53,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:22:55,003 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~B~0.offset))) (and (forall ((~C~0.offset Int) (v_ArrVal_2990 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2990))) (let ((.cse1 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) (.cse2 (select (select .cse0 c_~B~0.base) c_~B~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse0 c_~C~0.base (store (select .cse0 c_~C~0.base) ~C~0.offset (+ .cse1 .cse2))) c_~B~0.base) .cse3)) (+ .cse1 c_~csum~0 .cse2))))) (forall ((~C~0.offset Int) (v_ArrVal_2990 (Array Int Int))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2990))) (let ((.cse4 (select (select .cse6 c_~A~0.base) c_~A~0.offset)) (.cse5 (select (select .cse6 c_~B~0.base) c_~B~0.offset))) (<= (+ .cse4 c_~csum~0 .cse5) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse6 c_~C~0.base (store (select .cse6 c_~C~0.base) ~C~0.offset (+ .cse4 .cse5))) c_~B~0.base) .cse3)))))))) is different from false [2023-09-01 13:22:55,041 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:22:55,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2222 treesize of output 1958 [2023-09-01 13:22:55,079 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:22:55,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 722 treesize of output 662 [2023-09-01 13:23:00,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:00,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 46 [2023-09-01 13:23:00,075 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:00,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 52 [2023-09-01 13:23:00,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:00,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 97 [2023-09-01 13:23:00,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:00,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 71 [2023-09-01 13:23:00,177 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:00,181 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:00,186 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:00,190 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:00,201 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:00,207 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:00,219 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:00,224 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:00,229 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:00,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:00,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-09-01 13:23:00,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-09-01 13:23:00,264 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:00,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-09-01 13:23:00,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:00,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-09-01 13:23:00,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:00,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 562 treesize of output 454 [2023-09-01 13:23:00,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:00,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 347 treesize of output 253 [2023-09-01 13:23:00,380 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:00,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-09-01 13:23:00,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-09-01 13:23:00,405 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:00,427 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:00,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 19 [2023-09-01 13:23:00,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:00,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 56 treesize of output 46 [2023-09-01 13:23:00,466 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:00,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 54 treesize of output 52 [2023-09-01 13:23:00,521 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:00,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 89 treesize of output 81 [2023-09-01 13:23:00,534 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:00,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 73 treesize of output 61 [2023-09-01 13:23:00,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:00,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 25 [2023-09-01 13:23:00,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-09-01 13:23:00,610 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:00,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 27 [2023-09-01 13:23:00,624 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:00,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 19 [2023-09-01 13:23:00,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-09-01 13:23:00,750 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:00,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 117 [2023-09-01 13:23:01,145 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:01,152 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:01,159 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:01,165 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:01,179 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:01,187 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:01,194 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:01,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:01,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 172 [2023-09-01 13:23:01,275 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:01,282 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:01,327 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:01,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 75 [2023-09-01 13:23:01,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:01,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2023-09-01 13:23:01,743 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:01,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:01,755 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:01,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 75 [2023-09-01 13:23:01,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:01,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-09-01 13:23:01,814 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:01,820 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:01,829 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:01,847 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:01,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:01,860 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:01,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 578 treesize of output 354 [2023-09-01 13:23:02,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-09-01 13:23:02,040 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:02,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:02,053 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:02,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 33 [2023-09-01 13:23:02,072 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:02,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2023-09-01 13:23:02,283 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:02,286 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:02,337 INFO L321 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-09-01 13:23:02,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 326 treesize of output 228 [2023-09-01 13:23:02,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:02,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 50 treesize of output 43 [2023-09-01 13:23:02,761 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:02,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 64 [2023-09-01 13:23:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-09-01 13:23:02,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065961793] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:23:02,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:23:02,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 32 [2023-09-01 13:23:02,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748830900] [2023-09-01 13:23:02,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:23:02,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 13:23:02,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:23:02,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 13:23:02,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=932, Unknown=1, NotChecked=62, Total=1122 [2023-09-01 13:23:03,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 682 [2023-09-01 13:23:03,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 854 transitions, 18785 flow. Second operand has 34 states, 34 states have (on average 203.11764705882354) internal successors, (6906), 34 states have internal predecessors, (6906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:03,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:23:03,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 682 [2023-09-01 13:23:03,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:23:06,708 INFO L130 PetriNetUnfolder]: 6478/9471 cut-off events. [2023-09-01 13:23:06,709 INFO L131 PetriNetUnfolder]: For 196295/196295 co-relation queries the response was YES. [2023-09-01 13:23:06,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76518 conditions, 9471 events. 6478/9471 cut-off events. For 196295/196295 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 51222 event pairs, 2005 based on Foata normal form. 1/9472 useless extension candidates. Maximal degree in co-relation 75808. Up to 8543 conditions per place. [2023-09-01 13:23:06,856 INFO L137 encePairwiseOnDemand]: 668/682 looper letters, 537 selfloop transitions, 364 changer transitions 1/902 dead transitions. [2023-09-01 13:23:06,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 902 transitions, 21202 flow [2023-09-01 13:23:06,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:23:06,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:23:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2709 transitions. [2023-09-01 13:23:07,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30554928942025716 [2023-09-01 13:23:07,113 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2709 transitions. [2023-09-01 13:23:07,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2709 transitions. [2023-09-01 13:23:07,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:23:07,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2709 transitions. [2023-09-01 13:23:07,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 208.3846153846154) internal successors, (2709), 13 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:07,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:07,119 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:07,119 INFO L175 Difference]: Start difference. First operand has 398 places, 854 transitions, 18785 flow. Second operand 13 states and 2709 transitions. [2023-09-01 13:23:07,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 902 transitions, 21202 flow [2023-09-01 13:23:08,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 902 transitions, 20256 flow, removed 113 selfloop flow, removed 26 redundant places. [2023-09-01 13:23:08,038 INFO L231 Difference]: Finished difference. Result has 388 places, 866 transitions, 19041 flow [2023-09-01 13:23:08,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=17839, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=854, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=19041, PETRI_PLACES=388, PETRI_TRANSITIONS=866} [2023-09-01 13:23:08,039 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 356 predicate places. [2023-09-01 13:23:08,039 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 866 transitions, 19041 flow [2023-09-01 13:23:08,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 203.11764705882354) internal successors, (6906), 34 states have internal predecessors, (6906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:08,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:23:08,041 INFO L208 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] [2023-09-01 13:23:08,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-09-01 13:23:08,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-09-01 13:23:08,247 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:23:08,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:23:08,247 INFO L85 PathProgramCache]: Analyzing trace with hash -562875962, now seen corresponding path program 41 times [2023-09-01 13:23:08,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:23:08,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995931996] [2023-09-01 13:23:08,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:23:08,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:23:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:23:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:23:08,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:23:08,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995931996] [2023-09-01 13:23:08,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995931996] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:23:08,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41683098] [2023-09-01 13:23:08,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:23:08,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:23:08,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:23:08,851 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:23:08,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-09-01 13:23:09,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:23:09,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:23:09,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-09-01 13:23:09,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:23:09,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:09,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:23:09,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:09,407 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 23 [2023-09-01 13:23:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:23:09,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:23:09,558 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~B~0.offset))) (and (forall ((v_ArrVal_3057 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3057))) (let ((.cse0 (select .cse2 ~B~0.base))) (<= (+ c_~asum~0 c_~bsum~0 (select .cse0 .cse1)) (+ (select (select .cse2 c_~A~0.base) c_~A~0.offset) (select .cse0 c_~B~0.offset) c_~csum~0))))) (forall ((v_ArrVal_3057 (Array Int Int)) (~B~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3057))) (let ((.cse4 (select .cse3 ~B~0.base))) (<= (+ (select (select .cse3 c_~A~0.base) c_~A~0.offset) (select .cse4 c_~B~0.offset) c_~csum~0) (+ c_~asum~0 c_~bsum~0 (select .cse4 .cse1)))))))) is different from false [2023-09-01 13:23:09,595 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:09,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 166 [2023-09-01 13:23:09,616 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:09,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 98 [2023-09-01 13:23:09,913 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:23:10,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41683098] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:23:10,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:23:10,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2023-09-01 13:23:10,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251739706] [2023-09-01 13:23:10,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:23:10,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 13:23:10,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:23:10,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 13:23:10,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=498, Unknown=1, NotChecked=46, Total=650 [2023-09-01 13:23:10,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 682 [2023-09-01 13:23:10,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 866 transitions, 19041 flow. Second operand has 26 states, 26 states have (on average 233.42307692307693) internal successors, (6069), 26 states have internal predecessors, (6069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:10,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:23:10,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 682 [2023-09-01 13:23:10,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:23:13,749 INFO L130 PetriNetUnfolder]: 6636/9704 cut-off events. [2023-09-01 13:23:13,749 INFO L131 PetriNetUnfolder]: For 230142/230142 co-relation queries the response was YES. [2023-09-01 13:23:13,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79600 conditions, 9704 events. 6636/9704 cut-off events. For 230142/230142 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 52866 event pairs, 1989 based on Foata normal form. 1/9705 useless extension candidates. Maximal degree in co-relation 78886. Up to 8544 conditions per place. [2023-09-01 13:23:13,889 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 555 selfloop transitions, 362 changer transitions 1/918 dead transitions. [2023-09-01 13:23:13,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 918 transitions, 21756 flow [2023-09-01 13:23:13,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 13:23:13,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 13:23:13,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2411 transitions. [2023-09-01 13:23:13,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3535190615835777 [2023-09-01 13:23:13,891 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2411 transitions. [2023-09-01 13:23:13,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2411 transitions. [2023-09-01 13:23:13,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:23:13,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2411 transitions. [2023-09-01 13:23:13,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 241.1) internal successors, (2411), 10 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:13,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:13,896 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:13,896 INFO L175 Difference]: Start difference. First operand has 388 places, 866 transitions, 19041 flow. Second operand 10 states and 2411 transitions. [2023-09-01 13:23:13,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 918 transitions, 21756 flow [2023-09-01 13:23:14,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 918 transitions, 20845 flow, removed 127 selfloop flow, removed 8 redundant places. [2023-09-01 13:23:15,011 INFO L231 Difference]: Finished difference. Result has 391 places, 876 transitions, 19517 flow [2023-09-01 13:23:15,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=18144, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=355, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19517, PETRI_PLACES=391, PETRI_TRANSITIONS=876} [2023-09-01 13:23:15,012 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 359 predicate places. [2023-09-01 13:23:15,012 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 876 transitions, 19517 flow [2023-09-01 13:23:15,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 233.42307692307693) internal successors, (6069), 26 states have internal predecessors, (6069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:15,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:23:15,013 INFO L208 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] [2023-09-01 13:23:15,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-09-01 13:23:15,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-09-01 13:23:15,214 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:23:15,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:23:15,214 INFO L85 PathProgramCache]: Analyzing trace with hash 634044084, now seen corresponding path program 42 times [2023-09-01 13:23:15,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:23:15,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440317523] [2023-09-01 13:23:15,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:23:15,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:23:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:23:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:23:15,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:23:15,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440317523] [2023-09-01 13:23:15,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440317523] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:23:15,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979617940] [2023-09-01 13:23:15,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:23:15,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:23:15,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:23:15,942 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:23:15,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-09-01 13:23:16,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 13:23:16,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:23:16,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 82 conjunts are in the unsatisfiable core [2023-09-01 13:23:16,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:23:16,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:16,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:16,501 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 13:23:16,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2023-09-01 13:23:16,620 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:16,631 INFO L321 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2023-09-01 13:23:16,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2023-09-01 13:23:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:23:16,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:23:16,761 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_3124 (Array Int Int))) (<= .cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3124))) (+ c_~csum~0 (select (select .cse1 c_~B~0.base) c_~B~0.offset) (select (select .cse1 c_~A~0.base) c_~A~0.offset))))) (forall ((v_ArrVal_3124 (Array Int Int))) (<= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3124))) (+ c_~csum~0 (select (select .cse2 c_~B~0.base) c_~B~0.offset) (select (select .cse2 c_~A~0.base) c_~A~0.offset))) .cse0)))) is different from false [2023-09-01 13:23:16,774 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0 (select (select |c_#memory_int| c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~B~0.offset))))) (and (forall ((v_ArrVal_3124 (Array Int Int))) (<= .cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3124))) (+ c_~csum~0 (select (select .cse1 c_~B~0.base) c_~B~0.offset) (select (select .cse1 c_~A~0.base) c_~A~0.offset))))) (forall ((v_ArrVal_3124 (Array Int Int))) (<= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3124))) (+ c_~csum~0 (select (select .cse2 c_~B~0.base) c_~B~0.offset) (select (select .cse2 c_~A~0.base) c_~A~0.offset))) .cse0)))) is different from false [2023-09-01 13:23:16,813 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:16,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 158 treesize of output 154 [2023-09-01 13:23:16,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:16,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 78 treesize of output 78 [2023-09-01 13:23:17,221 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:17,222 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:17,291 INFO L321 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-09-01 13:23:17,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 57 [2023-09-01 13:23:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-09-01 13:23:17,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979617940] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:23:17,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:23:17,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-09-01 13:23:17,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142538382] [2023-09-01 13:23:17,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:23:17,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 13:23:17,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:23:17,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 13:23:17,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=594, Unknown=2, NotChecked=102, Total=812 [2023-09-01 13:23:17,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 682 [2023-09-01 13:23:17,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 876 transitions, 19517 flow. Second operand has 29 states, 29 states have (on average 227.27586206896552) internal successors, (6591), 29 states have internal predecessors, (6591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:17,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:23:17,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 682 [2023-09-01 13:23:17,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:23:20,967 INFO L130 PetriNetUnfolder]: 6764/9893 cut-off events. [2023-09-01 13:23:20,968 INFO L131 PetriNetUnfolder]: For 248185/248185 co-relation queries the response was YES. [2023-09-01 13:23:21,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82013 conditions, 9893 events. 6764/9893 cut-off events. For 248185/248185 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 53892 event pairs, 2011 based on Foata normal form. 1/9894 useless extension candidates. Maximal degree in co-relation 81297. Up to 8598 conditions per place. [2023-09-01 13:23:21,250 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 558 selfloop transitions, 368 changer transitions 1/927 dead transitions. [2023-09-01 13:23:21,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 927 transitions, 22238 flow [2023-09-01 13:23:21,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:23:21,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:23:21,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2126 transitions. [2023-09-01 13:23:21,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3463668947539915 [2023-09-01 13:23:21,252 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2126 transitions. [2023-09-01 13:23:21,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2126 transitions. [2023-09-01 13:23:21,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:23:21,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2126 transitions. [2023-09-01 13:23:21,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 236.22222222222223) internal successors, (2126), 9 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:21,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:21,256 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:21,256 INFO L175 Difference]: Start difference. First operand has 391 places, 876 transitions, 19517 flow. Second operand 9 states and 2126 transitions. [2023-09-01 13:23:21,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 927 transitions, 22238 flow [2023-09-01 13:23:22,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 927 transitions, 21256 flow, removed 285 selfloop flow, removed 5 redundant places. [2023-09-01 13:23:22,267 INFO L231 Difference]: Finished difference. Result has 397 places, 885 transitions, 19940 flow [2023-09-01 13:23:22,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=18551, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=876, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=361, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19940, PETRI_PLACES=397, PETRI_TRANSITIONS=885} [2023-09-01 13:23:22,268 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 365 predicate places. [2023-09-01 13:23:22,268 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 885 transitions, 19940 flow [2023-09-01 13:23:22,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 227.27586206896552) internal successors, (6591), 29 states have internal predecessors, (6591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:22,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:23:22,269 INFO L208 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] [2023-09-01 13:23:22,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-09-01 13:23:22,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-09-01 13:23:22,470 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:23:22,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:23:22,470 INFO L85 PathProgramCache]: Analyzing trace with hash -756902622, now seen corresponding path program 43 times [2023-09-01 13:23:22,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:23:22,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795394757] [2023-09-01 13:23:22,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:23:22,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:23:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:23:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:23:23,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:23:23,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795394757] [2023-09-01 13:23:23,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795394757] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:23:23,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825549937] [2023-09-01 13:23:23,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:23:23,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:23:23,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:23:23,556 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:23:23,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-09-01 13:23:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:23:23,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 81 conjunts are in the unsatisfiable core [2023-09-01 13:23:23,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:23:24,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:24,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:24,170 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 13:23:24,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2023-09-01 13:23:24,237 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:24,237 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 23 [2023-09-01 13:23:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:23:24,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:23:24,358 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_3191 (Array Int Int))) (<= .cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3191))) (+ (select (select .cse1 c_~A~0.base) c_~A~0.offset) (select (select .cse1 c_~B~0.base) c_~B~0.offset) c_~csum~0)))) (forall ((v_ArrVal_3191 (Array Int Int))) (<= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3191))) (+ (select (select .cse2 c_~A~0.base) c_~A~0.offset) (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0)) .cse0)))) is different from false [2023-09-01 13:23:24,372 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (select (select |c_#memory_int| c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_3191 (Array Int Int))) (<= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3191))) (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) (select (select .cse0 c_~B~0.base) c_~B~0.offset) c_~csum~0)) .cse1)) (forall ((v_ArrVal_3191 (Array Int Int))) (<= .cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3191))) (+ (select (select .cse2 c_~A~0.base) c_~A~0.offset) (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0)))))) is different from false [2023-09-01 13:23:24,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:24,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 158 treesize of output 154 [2023-09-01 13:23:24,424 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:24,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 78 treesize of output 78 [2023-09-01 13:23:24,818 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:24,819 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:24,865 INFO L321 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-09-01 13:23:24,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 57 [2023-09-01 13:23:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-09-01 13:23:25,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825549937] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:23:25,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:23:25,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 31 [2023-09-01 13:23:25,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905393315] [2023-09-01 13:23:25,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:23:25,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 13:23:25,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:23:25,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 13:23:25,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=804, Unknown=2, NotChecked=118, Total=1056 [2023-09-01 13:23:25,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 682 [2023-09-01 13:23:25,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 885 transitions, 19940 flow. Second operand has 33 states, 33 states have (on average 205.0) internal successors, (6765), 33 states have internal predecessors, (6765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:25,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:23:25,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 682 [2023-09-01 13:23:25,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:23:29,054 INFO L130 PetriNetUnfolder]: 6946/10160 cut-off events. [2023-09-01 13:23:29,054 INFO L131 PetriNetUnfolder]: For 260126/260126 co-relation queries the response was YES. [2023-09-01 13:23:29,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84910 conditions, 10160 events. 6946/10160 cut-off events. For 260126/260126 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 55871 event pairs, 2197 based on Foata normal form. 1/10161 useless extension candidates. Maximal degree in co-relation 84190. Up to 9028 conditions per place. [2023-09-01 13:23:29,190 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 580 selfloop transitions, 358 changer transitions 1/939 dead transitions. [2023-09-01 13:23:29,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 939 transitions, 22844 flow [2023-09-01 13:23:29,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 13:23:29,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 13:23:29,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2333 transitions. [2023-09-01 13:23:29,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3109837376699547 [2023-09-01 13:23:29,192 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2333 transitions. [2023-09-01 13:23:29,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2333 transitions. [2023-09-01 13:23:29,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:23:29,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2333 transitions. [2023-09-01 13:23:29,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 212.0909090909091) internal successors, (2333), 11 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:29,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:29,197 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:29,197 INFO L175 Difference]: Start difference. First operand has 397 places, 885 transitions, 19940 flow. Second operand 11 states and 2333 transitions. [2023-09-01 13:23:29,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 939 transitions, 22844 flow [2023-09-01 13:23:30,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 939 transitions, 21892 flow, removed 272 selfloop flow, removed 4 redundant places. [2023-09-01 13:23:30,580 INFO L231 Difference]: Finished difference. Result has 406 places, 898 transitions, 20539 flow [2023-09-01 13:23:30,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=18994, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=20539, PETRI_PLACES=406, PETRI_TRANSITIONS=898} [2023-09-01 13:23:30,582 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 374 predicate places. [2023-09-01 13:23:30,582 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 898 transitions, 20539 flow [2023-09-01 13:23:30,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 205.0) internal successors, (6765), 33 states have internal predecessors, (6765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:30,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:23:30,583 INFO L208 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] [2023-09-01 13:23:30,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-09-01 13:23:30,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:23:30,790 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:23:30,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:23:30,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1173329740, now seen corresponding path program 44 times [2023-09-01 13:23:30,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:23:30,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716218095] [2023-09-01 13:23:30,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:23:30,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:23:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:23:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:23:31,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:23:31,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716218095] [2023-09-01 13:23:31,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716218095] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:23:31,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016409417] [2023-09-01 13:23:31,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:23:31,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:23:31,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:23:31,523 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:23:31,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-09-01 13:23:31,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:23:31,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:23:31,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 105 conjunts are in the unsatisfiable core [2023-09-01 13:23:31,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:23:31,796 INFO L321 Elim1Store]: treesize reduction 75, result has 31.2 percent of original size [2023-09-01 13:23:31,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 63 [2023-09-01 13:23:31,856 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-09-01 13:23:31,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-09-01 13:23:31,928 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:23:31,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-09-01 13:23:32,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:32,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:23:32,430 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-09-01 13:23:32,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-09-01 13:23:32,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:32,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 94 [2023-09-01 13:23:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:23:32,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:23:34,925 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset))) (and (forall ((~C~0.offset Int) (v_ArrVal_3265 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3265))) (let ((.cse0 (select (select .cse2 c_~A~0.base) c_~A~0.offset)) (.cse1 (select (select .cse2 c_~B~0.base) c_~B~0.offset))) (<= (+ .cse0 c_~csum~0 .cse1) (+ (select (select (store .cse2 c_~C~0.base (store (select .cse2 c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~A~0.base) .cse3) c_~asum~0 c_~bsum~0))))) (forall ((~C~0.offset Int) (v_ArrVal_3265 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3265))) (let ((.cse5 (select (select .cse4 c_~A~0.base) c_~A~0.offset)) (.cse6 (select (select .cse4 c_~B~0.base) c_~B~0.offset))) (<= (+ (select (select (store .cse4 c_~C~0.base (store (select .cse4 c_~C~0.base) ~C~0.offset (+ .cse5 .cse6))) c_~A~0.base) .cse3) c_~asum~0 c_~bsum~0) (+ .cse5 c_~csum~0 .cse6))))))) is different from false [2023-09-01 13:23:34,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:34,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2582 treesize of output 2282 [2023-09-01 13:23:35,002 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:35,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 722 treesize of output 662 [2023-09-01 13:23:43,429 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:43,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 125 [2023-09-01 13:23:43,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:43,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 99 [2023-09-01 13:23:43,488 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:43,496 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:43,515 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:43,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 161 [2023-09-01 13:23:43,564 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:43,583 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:43,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 92 treesize of output 98 [2023-09-01 13:23:43,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-09-01 13:23:43,718 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:43,727 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:43,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 39 [2023-09-01 13:23:43,746 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:43,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:43,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 37 [2023-09-01 13:23:43,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:43,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 19 [2023-09-01 13:23:43,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:43,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2023-09-01 13:23:43,794 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:43,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2023-09-01 13:23:43,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:43,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:43,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 89 treesize of output 85 [2023-09-01 13:23:43,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:43,997 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:43,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 25 [2023-09-01 13:23:44,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-09-01 13:23:44,018 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:44,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:44,049 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:44,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 45 [2023-09-01 13:23:44,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:44,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 17 [2023-09-01 13:23:44,101 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:44,104 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:44,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:44,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2023-09-01 13:23:44,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:44,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-09-01 13:23:44,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:44,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-09-01 13:23:44,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:44,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-09-01 13:23:44,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-09-01 13:23:44,419 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:44,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2023-09-01 13:23:44,443 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:44,460 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:44,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2023-09-01 13:23:44,509 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:44,519 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:44,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 37 [2023-09-01 13:23:44,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:44,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2023-09-01 13:23:44,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:44,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2023-09-01 13:23:44,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-09-01 13:23:44,635 INFO L321 Elim1Store]: treesize reduction 28, result has 56.9 percent of original size [2023-09-01 13:23:44,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 47 [2023-09-01 13:23:44,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:44,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-09-01 13:23:44,683 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 13:23:44,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2023-09-01 13:23:44,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:44,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-09-01 13:23:44,793 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:44,795 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:44,843 INFO L321 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-09-01 13:23:44,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 326 treesize of output 228 [2023-09-01 13:23:44,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:44,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 50 treesize of output 43 [2023-09-01 13:23:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:23:45,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016409417] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:23:45,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:23:45,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-09-01 13:23:45,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14336479] [2023-09-01 13:23:45,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:23:45,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 13:23:45,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:23:45,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 13:23:45,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=862, Unknown=1, NotChecked=60, Total=1056 [2023-09-01 13:23:45,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 682 [2023-09-01 13:23:45,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 898 transitions, 20539 flow. Second operand has 33 states, 33 states have (on average 220.0) internal successors, (7260), 33 states have internal predecessors, (7260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:45,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:23:45,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 682 [2023-09-01 13:23:45,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:23:49,194 INFO L130 PetriNetUnfolder]: 7026/10277 cut-off events. [2023-09-01 13:23:49,195 INFO L131 PetriNetUnfolder]: For 252531/252531 co-relation queries the response was YES. [2023-09-01 13:23:49,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86053 conditions, 10277 events. 7026/10277 cut-off events. For 252531/252531 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 56532 event pairs, 2349 based on Foata normal form. 1/10278 useless extension candidates. Maximal degree in co-relation 85329. Up to 9391 conditions per place. [2023-09-01 13:23:49,354 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 580 selfloop transitions, 356 changer transitions 1/937 dead transitions. [2023-09-01 13:23:49,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 937 transitions, 23175 flow [2023-09-01 13:23:49,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:23:49,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:23:49,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2703 transitions. [2023-09-01 13:23:49,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33027859237536655 [2023-09-01 13:23:49,357 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2703 transitions. [2023-09-01 13:23:49,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2703 transitions. [2023-09-01 13:23:49,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:23:49,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2703 transitions. [2023-09-01 13:23:49,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 225.25) internal successors, (2703), 12 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:49,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:49,363 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:49,363 INFO L175 Difference]: Start difference. First operand has 406 places, 898 transitions, 20539 flow. Second operand 12 states and 2703 transitions. [2023-09-01 13:23:49,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 937 transitions, 23175 flow [2023-09-01 13:23:50,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 937 transitions, 22052 flow, removed 380 selfloop flow, removed 5 redundant places. [2023-09-01 13:23:50,607 INFO L231 Difference]: Finished difference. Result has 415 places, 907 transitions, 20766 flow [2023-09-01 13:23:50,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=19508, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=898, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=20766, PETRI_PLACES=415, PETRI_TRANSITIONS=907} [2023-09-01 13:23:50,608 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 383 predicate places. [2023-09-01 13:23:50,608 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 907 transitions, 20766 flow [2023-09-01 13:23:50,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 220.0) internal successors, (7260), 33 states have internal predecessors, (7260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:50,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:23:50,610 INFO L208 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] [2023-09-01 13:23:50,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-09-01 13:23:50,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:23:50,815 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:23:50,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:23:50,816 INFO L85 PathProgramCache]: Analyzing trace with hash 563687782, now seen corresponding path program 45 times [2023-09-01 13:23:50,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:23:50,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472638243] [2023-09-01 13:23:50,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:23:50,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:23:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:23:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:23:51,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:23:51,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472638243] [2023-09-01 13:23:51,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472638243] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:23:51,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875992172] [2023-09-01 13:23:51,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:23:51,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:23:51,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:23:51,745 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:23:51,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-09-01 13:23:51,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 13:23:51,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:23:51,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-09-01 13:23:51,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:23:52,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:23:52,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:23:52,372 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:52,372 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 23 [2023-09-01 13:23:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:23:52,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:23:52,542 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset))) (and (forall ((v_ArrVal_3332 (Array Int Int)) (~A~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3332))) (let ((.cse0 (select .cse2 ~A~0.base))) (<= (+ c_~asum~0 c_~bsum~0 (select .cse0 .cse1)) (+ (select .cse0 c_~A~0.offset) (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0))))) (forall ((v_ArrVal_3332 (Array Int Int)) (~A~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3332))) (let ((.cse3 (select .cse4 ~A~0.base))) (<= (+ (select .cse3 c_~A~0.offset) (select (select .cse4 c_~B~0.base) c_~B~0.offset) c_~csum~0) (+ c_~asum~0 c_~bsum~0 (select .cse3 .cse1)))))))) is different from false [2023-09-01 13:23:52,579 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:52,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 166 [2023-09-01 13:23:52,600 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:23:52,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 98 [2023-09-01 13:23:52,955 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:23:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:23:53,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875992172] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:23:53,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:23:53,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 30 [2023-09-01 13:23:53,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278916871] [2023-09-01 13:23:53,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:23:53,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 13:23:53,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:23:53,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 13:23:53,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=805, Unknown=1, NotChecked=58, Total=992 [2023-09-01 13:23:53,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 682 [2023-09-01 13:23:53,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 907 transitions, 20766 flow. Second operand has 32 states, 32 states have (on average 205.03125) internal successors, (6561), 32 states have internal predecessors, (6561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:53,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:23:53,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 682 [2023-09-01 13:23:53,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:23:57,281 INFO L130 PetriNetUnfolder]: 7109/10399 cut-off events. [2023-09-01 13:23:57,281 INFO L131 PetriNetUnfolder]: For 228793/228793 co-relation queries the response was YES. [2023-09-01 13:23:57,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85846 conditions, 10399 events. 7109/10399 cut-off events. For 228793/228793 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 57385 event pairs, 2388 based on Foata normal form. 1/10400 useless extension candidates. Maximal degree in co-relation 85118. Up to 9470 conditions per place. [2023-09-01 13:23:57,459 INFO L137 encePairwiseOnDemand]: 668/682 looper letters, 605 selfloop transitions, 363 changer transitions 1/969 dead transitions. [2023-09-01 13:23:57,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 969 transitions, 23491 flow [2023-09-01 13:23:57,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 13:23:57,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 13:23:57,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2953 transitions. [2023-09-01 13:23:57,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3092794302471722 [2023-09-01 13:23:57,462 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2953 transitions. [2023-09-01 13:23:57,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2953 transitions. [2023-09-01 13:23:57,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:23:57,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2953 transitions. [2023-09-01 13:23:57,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 210.92857142857142) internal successors, (2953), 14 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:57,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 682.0) internal successors, (10230), 15 states have internal predecessors, (10230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:57,469 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 682.0) internal successors, (10230), 15 states have internal predecessors, (10230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:57,469 INFO L175 Difference]: Start difference. First operand has 415 places, 907 transitions, 20766 flow. Second operand 14 states and 2953 transitions. [2023-09-01 13:23:57,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 969 transitions, 23491 flow [2023-09-01 13:23:58,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 969 transitions, 22591 flow, removed 227 selfloop flow, removed 7 redundant places. [2023-09-01 13:23:58,622 INFO L231 Difference]: Finished difference. Result has 424 places, 930 transitions, 21214 flow [2023-09-01 13:23:58,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=19910, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=907, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=340, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=21214, PETRI_PLACES=424, PETRI_TRANSITIONS=930} [2023-09-01 13:23:58,623 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 392 predicate places. [2023-09-01 13:23:58,623 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 930 transitions, 21214 flow [2023-09-01 13:23:58,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 205.03125) internal successors, (6561), 32 states have internal predecessors, (6561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:23:58,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:23:58,624 INFO L208 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] [2023-09-01 13:23:58,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-09-01 13:23:58,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:23:58,825 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:23:58,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:23:58,825 INFO L85 PathProgramCache]: Analyzing trace with hash -946393740, now seen corresponding path program 46 times [2023-09-01 13:23:58,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:23:58,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755560272] [2023-09-01 13:23:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:23:58,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:23:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:23:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:23:59,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:23:59,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755560272] [2023-09-01 13:23:59,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755560272] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:23:59,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594002470] [2023-09-01 13:23:59,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:23:59,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:23:59,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:23:59,606 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:23:59,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-09-01 13:23:59,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:23:59,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:23:59,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-09-01 13:23:59,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:24:00,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:24:00,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:24:00,242 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:24:00,242 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 23 [2023-09-01 13:24:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:24:00,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:24:00,407 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~B~0.offset))) (and (forall ((v_ArrVal_3399 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3399))) (let ((.cse0 (select .cse2 ~B~0.base))) (<= (+ (select .cse0 .cse1) c_~asum~0 c_~bsum~0) (+ c_~csum~0 (select .cse0 c_~B~0.offset) (select (select .cse2 c_~A~0.base) c_~A~0.offset)))))) (forall ((v_ArrVal_3399 (Array Int Int)) (~B~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3399))) (let ((.cse3 (select .cse4 ~B~0.base))) (<= (+ c_~csum~0 (select .cse3 c_~B~0.offset) (select (select .cse4 c_~A~0.base) c_~A~0.offset)) (+ (select .cse3 .cse1) c_~asum~0 c_~bsum~0))))))) is different from false [2023-09-01 13:24:00,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:24:00,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 166 [2023-09-01 13:24:00,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:24:00,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 98 [2023-09-01 13:24:00,793 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:24:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-09-01 13:24:00,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594002470] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:24:00,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:24:00,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 26 [2023-09-01 13:24:00,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301785125] [2023-09-01 13:24:00,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:24:00,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 13:24:00,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:24:00,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 13:24:00,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=596, Unknown=1, NotChecked=50, Total=756 [2023-09-01 13:24:01,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 682 [2023-09-01 13:24:01,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 930 transitions, 21214 flow. Second operand has 28 states, 28 states have (on average 201.35714285714286) internal successors, (5638), 28 states have internal predecessors, (5638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:01,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:24:01,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 682 [2023-09-01 13:24:01,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:24:04,417 INFO L130 PetriNetUnfolder]: 7169/10488 cut-off events. [2023-09-01 13:24:04,417 INFO L131 PetriNetUnfolder]: For 224481/224481 co-relation queries the response was YES. [2023-09-01 13:24:04,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88579 conditions, 10488 events. 7169/10488 cut-off events. For 224481/224481 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 57883 event pairs, 2328 based on Foata normal form. 1/10489 useless extension candidates. Maximal degree in co-relation 87851. Up to 9552 conditions per place. [2023-09-01 13:24:04,587 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 624 selfloop transitions, 348 changer transitions 1/973 dead transitions. [2023-09-01 13:24:04,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 973 transitions, 23695 flow [2023-09-01 13:24:04,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:24:04,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:24:04,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2486 transitions. [2023-09-01 13:24:04,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30376344086021506 [2023-09-01 13:24:04,590 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2486 transitions. [2023-09-01 13:24:04,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2486 transitions. [2023-09-01 13:24:04,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:24:04,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2486 transitions. [2023-09-01 13:24:04,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 207.16666666666666) internal successors, (2486), 12 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:04,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:04,595 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:04,595 INFO L175 Difference]: Start difference. First operand has 424 places, 930 transitions, 21214 flow. Second operand 12 states and 2486 transitions. [2023-09-01 13:24:04,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 973 transitions, 23695 flow [2023-09-01 13:24:05,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 973 transitions, 22710 flow, removed 142 selfloop flow, removed 8 redundant places. [2023-09-01 13:24:05,740 INFO L231 Difference]: Finished difference. Result has 429 places, 935 transitions, 21219 flow [2023-09-01 13:24:05,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=20235, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21219, PETRI_PLACES=429, PETRI_TRANSITIONS=935} [2023-09-01 13:24:05,741 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 397 predicate places. [2023-09-01 13:24:05,741 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 935 transitions, 21219 flow [2023-09-01 13:24:05,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 201.35714285714286) internal successors, (5638), 28 states have internal predecessors, (5638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:05,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:24:05,743 INFO L208 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] [2023-09-01 13:24:05,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-09-01 13:24:05,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-09-01 13:24:05,949 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:24:05,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:24:05,950 INFO L85 PathProgramCache]: Analyzing trace with hash 501744816, now seen corresponding path program 47 times [2023-09-01 13:24:05,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:24:05,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506978176] [2023-09-01 13:24:05,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:24:05,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:24:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:24:07,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:24:07,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506978176] [2023-09-01 13:24:07,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506978176] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:24:07,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516237350] [2023-09-01 13:24:07,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:24:07,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:24:07,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:24:07,073 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:24:07,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-09-01 13:24:07,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:24:07,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:24:07,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 88 conjunts are in the unsatisfiable core [2023-09-01 13:24:07,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:24:07,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:24:07,366 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:24:07,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-09-01 13:24:07,647 INFO L321 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2023-09-01 13:24:07,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-09-01 13:24:07,797 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:24:07,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 102 [2023-09-01 13:24:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:24:07,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:24:08,615 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:24:08,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 118 [2023-09-01 13:24:08,726 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:24:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:24:08,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516237350] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:24:08,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:24:08,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-09-01 13:24:08,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686046088] [2023-09-01 13:24:08,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:24:08,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 13:24:08,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:24:08,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 13:24:08,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2023-09-01 13:24:11,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:24:19,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 682 [2023-09-01 13:24:19,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 935 transitions, 21219 flow. Second operand has 33 states, 33 states have (on average 227.24242424242425) internal successors, (7499), 33 states have internal predecessors, (7499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:19,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:24:19,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 682 [2023-09-01 13:24:19,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:24:25,204 INFO L130 PetriNetUnfolder]: 7335/10729 cut-off events. [2023-09-01 13:24:25,205 INFO L131 PetriNetUnfolder]: For 231651/231651 co-relation queries the response was YES. [2023-09-01 13:24:25,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90860 conditions, 10729 events. 7335/10729 cut-off events. For 231651/231651 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59303 event pairs, 2505 based on Foata normal form. 1/10730 useless extension candidates. Maximal degree in co-relation 90130. Up to 9839 conditions per place. [2023-09-01 13:24:25,388 INFO L137 encePairwiseOnDemand]: 667/682 looper letters, 697 selfloop transitions, 362 changer transitions 1/1060 dead transitions. [2023-09-01 13:24:25,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 1060 transitions, 25003 flow [2023-09-01 13:24:25,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 13:24:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 13:24:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 7409 transitions. [2023-09-01 13:24:25,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33948863636363635 [2023-09-01 13:24:25,393 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 7409 transitions. [2023-09-01 13:24:25,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 7409 transitions. [2023-09-01 13:24:25,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:24:25,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 7409 transitions. [2023-09-01 13:24:25,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 231.53125) internal successors, (7409), 32 states have internal predecessors, (7409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:25,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 682.0) internal successors, (22506), 33 states have internal predecessors, (22506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:25,406 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 682.0) internal successors, (22506), 33 states have internal predecessors, (22506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:25,406 INFO L175 Difference]: Start difference. First operand has 429 places, 935 transitions, 21219 flow. Second operand 32 states and 7409 transitions. [2023-09-01 13:24:25,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 1060 transitions, 25003 flow [2023-09-01 13:24:26,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1060 transitions, 24087 flow, removed 116 selfloop flow, removed 9 redundant places. [2023-09-01 13:24:26,458 INFO L231 Difference]: Finished difference. Result has 452 places, 965 transitions, 21883 flow [2023-09-01 13:24:26,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=20313, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=935, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=21883, PETRI_PLACES=452, PETRI_TRANSITIONS=965} [2023-09-01 13:24:26,459 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 420 predicate places. [2023-09-01 13:24:26,459 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 965 transitions, 21883 flow [2023-09-01 13:24:26,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 227.24242424242425) internal successors, (7499), 33 states have internal predecessors, (7499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:26,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:24:26,460 INFO L208 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] [2023-09-01 13:24:26,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-09-01 13:24:26,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-09-01 13:24:26,665 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:24:26,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:24:26,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2004462942, now seen corresponding path program 48 times [2023-09-01 13:24:26,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:24:26,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496908732] [2023-09-01 13:24:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:24:26,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:24:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:24:27,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:24:27,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496908732] [2023-09-01 13:24:27,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496908732] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:24:27,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968858983] [2023-09-01 13:24:27,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:24:27,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:24:27,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:24:27,209 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:24:27,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-09-01 13:24:27,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 13:24:27,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:24:27,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 82 conjunts are in the unsatisfiable core [2023-09-01 13:24:27,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:24:27,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:24:27,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:24:27,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:24:27,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:24:27,869 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:24:27,870 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 23 [2023-09-01 13:24:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:24:27,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:24:28,041 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_3534 (Array Int Int))) (<= .cse0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3534) c_~A~0.base) c_~A~0.offset) c_~csum~0))) (forall ((v_ArrVal_3534 (Array Int Int))) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3534) c_~A~0.base) c_~A~0.offset) c_~csum~0) .cse0)))) is different from false [2023-09-01 13:24:28,053 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_3533 (Array Int Int)) (v_ArrVal_3534 (Array Int Int))) (<= .cse0 (+ c_~csum~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3533) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3534) c_~A~0.base) c_~A~0.offset)))) (forall ((v_ArrVal_3533 (Array Int Int)) (v_ArrVal_3534 (Array Int Int))) (<= (+ c_~csum~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3533) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3534) c_~A~0.base) c_~A~0.offset)) .cse0)))) is different from false [2023-09-01 13:24:28,065 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:24:28,065 INFO L350 Elim1Store]: Elim1 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 218 treesize of output 154 [2023-09-01 13:24:28,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-09-01 13:24:28,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2023-09-01 13:24:28,105 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:24:28,106 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:24:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-09-01 13:24:28,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968858983] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:24:28,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:24:28,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 26 [2023-09-01 13:24:28,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972445899] [2023-09-01 13:24:28,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:24:28,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 13:24:28,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:24:28,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 13:24:28,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=554, Unknown=2, NotChecked=98, Total=756 [2023-09-01 13:24:28,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 682 [2023-09-01 13:24:28,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 965 transitions, 21883 flow. Second operand has 28 states, 28 states have (on average 230.28571428571428) internal successors, (6448), 28 states have internal predecessors, (6448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:28,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:24:28,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 682 [2023-09-01 13:24:28,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:24:32,106 INFO L130 PetriNetUnfolder]: 7430/10871 cut-off events. [2023-09-01 13:24:32,106 INFO L131 PetriNetUnfolder]: For 227531/227531 co-relation queries the response was YES. [2023-09-01 13:24:32,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91654 conditions, 10871 events. 7430/10871 cut-off events. For 227531/227531 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 60336 event pairs, 1389 based on Foata normal form. 1/10872 useless extension candidates. Maximal degree in co-relation 90923. Up to 9168 conditions per place. [2023-09-01 13:24:32,250 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 563 selfloop transitions, 469 changer transitions 1/1033 dead transitions. [2023-09-01 13:24:32,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 1033 transitions, 24749 flow [2023-09-01 13:24:32,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 13:24:32,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 13:24:32,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2379 transitions. [2023-09-01 13:24:32,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34882697947214075 [2023-09-01 13:24:32,258 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2379 transitions. [2023-09-01 13:24:32,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2379 transitions. [2023-09-01 13:24:32,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:24:32,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2379 transitions. [2023-09-01 13:24:32,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 237.9) internal successors, (2379), 10 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:32,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:32,263 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:32,263 INFO L175 Difference]: Start difference. First operand has 452 places, 965 transitions, 21883 flow. Second operand 10 states and 2379 transitions. [2023-09-01 13:24:32,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 1033 transitions, 24749 flow [2023-09-01 13:24:33,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 1033 transitions, 24045 flow, removed 134 selfloop flow, removed 16 redundant places. [2023-09-01 13:24:33,114 INFO L231 Difference]: Finished difference. Result has 449 places, 984 transitions, 22867 flow [2023-09-01 13:24:33,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=21179, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=450, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=22867, PETRI_PLACES=449, PETRI_TRANSITIONS=984} [2023-09-01 13:24:33,115 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 417 predicate places. [2023-09-01 13:24:33,115 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 984 transitions, 22867 flow [2023-09-01 13:24:33,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 230.28571428571428) internal successors, (6448), 28 states have internal predecessors, (6448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:33,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:24:33,116 INFO L208 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] [2023-09-01 13:24:33,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-09-01 13:24:33,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:24:33,316 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:24:33,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:24:33,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1319615602, now seen corresponding path program 49 times [2023-09-01 13:24:33,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:24:33,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436559108] [2023-09-01 13:24:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:24:33,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:24:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:24:34,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:24:34,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436559108] [2023-09-01 13:24:34,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436559108] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:24:34,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277244561] [2023-09-01 13:24:34,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:24:34,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:24:34,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:24:34,501 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:24:34,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-09-01 13:24:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:34,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 92 conjunts are in the unsatisfiable core [2023-09-01 13:24:34,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:24:34,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:24:34,842 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:24:34,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-09-01 13:24:35,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:24:35,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:24:35,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:24:35,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:24:35,279 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-09-01 13:24:35,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-09-01 13:24:35,408 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:24:35,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-09-01 13:24:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:24:35,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:24:37,476 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_3603 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3603))) (let ((.cse1 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) (.cse2 (select (select .cse0 c_~B~0.base) c_~B~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse0 c_~C~0.base (store (select .cse0 c_~C~0.base) ~C~0.offset (+ .cse1 .cse2))) c_~B~0.base) c_~B~0.offset)) (+ .cse1 .cse2 c_~csum~0))))) (forall ((~C~0.offset Int) (v_ArrVal_3603 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3603))) (let ((.cse3 (select (select .cse5 c_~A~0.base) c_~A~0.offset)) (.cse4 (select (select .cse5 c_~B~0.base) c_~B~0.offset))) (<= (+ .cse3 .cse4 c_~csum~0) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse5 c_~C~0.base (store (select .cse5 c_~C~0.base) ~C~0.offset (+ .cse3 .cse4))) c_~B~0.base) c_~B~0.offset))))))) is different from false [2023-09-01 13:24:37,494 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_3602 (Array Int Int)) (v_ArrVal_3603 (Array Int Int))) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3602) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3603))) (let ((.cse0 (select (select .cse2 c_~A~0.base) c_~A~0.offset)) (.cse1 (select (select .cse2 c_~B~0.base) c_~B~0.offset))) (<= (+ .cse0 .cse1 c_~csum~0) (+ (select (select (store .cse2 c_~C~0.base (store (select .cse2 c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~B~0.base) c_~B~0.offset) c_~asum~0 c_~bsum~0))))) (forall ((~C~0.offset Int) (v_ArrVal_3602 (Array Int Int)) (v_ArrVal_3603 (Array Int Int))) (let ((.cse3 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3602) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3603))) (let ((.cse4 (select (select .cse3 c_~A~0.base) c_~A~0.offset)) (.cse5 (select (select .cse3 c_~B~0.base) c_~B~0.offset))) (<= (+ (select (select (store .cse3 c_~C~0.base (store (select .cse3 c_~C~0.base) ~C~0.offset (+ .cse4 .cse5))) c_~B~0.base) c_~B~0.offset) c_~asum~0 c_~bsum~0) (+ .cse4 .cse5 c_~csum~0)))))) is different from false [2023-09-01 13:24:37,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:24:37,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116870 treesize of output 105254 [2023-09-01 13:24:38,090 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:24:38,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4598 treesize of output 4350 [2023-09-01 13:24:38,150 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:24:38,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4558 treesize of output 4438 Killed by 15