./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.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-dot-product.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 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 --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 13:04:42,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 13:04:42,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 13:04:42,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 13:04:42,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 13:04:42,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 13:04:42,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 13:04:42,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 13:04:42,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 13:04:42,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 13:04:42,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 13:04:42,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 13:04:42,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 13:04:42,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 13:04:42,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 13:04:42,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 13:04:42,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 13:04:42,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 13:04:42,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 13:04:42,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 13:04:42,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 13:04:42,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 13:04:42,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 13:04:42,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 13:04:42,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 13:04:42,888 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 13:04:42,888 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 13:04:42,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 13:04:42,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 13:04:42,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 13:04:42,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 13:04:42,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 13:04:42,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 13:04:42,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 13:04:42,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 13:04:42,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 13:04:42,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 13:04:42,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 13:04:42,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 13:04:42,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 13:04:42,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 13:04:42,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 13:04:42,934 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 13:04:42,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 13:04:42,934 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 13:04:42,935 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 13:04:42,935 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 13:04:42,936 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 13:04:42,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 13:04:42,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 13:04:42,937 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 13:04:42,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 13:04:42,938 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 13:04:42,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 13:04:42,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 13:04:42,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 13:04:42,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 13:04:42,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 13:04:42,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 13:04:42,939 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 13:04:42,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 13:04:42,939 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 13:04:42,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 13:04:42,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 13:04:42,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 13:04:42,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 13:04:42,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:04:42,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 13:04:42,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 13:04:42,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 13:04:42,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 13:04:42,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 13:04:42,942 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 13:04:42,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 13:04:42,942 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 13:04:42,942 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 13:04:42,943 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 13:04:42,943 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 13:04:43,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 13:04:43,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 13:04:43,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 13:04:43,256 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 13:04:43,257 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 13:04:43,259 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-09-01 13:04:44,492 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 13:04:44,716 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 13:04:44,717 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-09-01 13:04:44,728 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7f0843c3/126b174aed1644b99ae8e65a801eb40d/FLAGd59827481 [2023-09-01 13:04:44,748 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7f0843c3/126b174aed1644b99ae8e65a801eb40d [2023-09-01 13:04:44,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 13:04:44,751 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 13:04:44,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 13:04:44,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 13:04:44,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 13:04:44,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:04:44" (1/1) ... [2023-09-01 13:04:44,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1939bf62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:44, skipping insertion in model container [2023-09-01 13:04:44,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:04:44" (1/1) ... [2023-09-01 13:04:44,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 13:04:44,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 13:04:44,959 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-dot-product.wvr.c[2865,2878] [2023-09-01 13:04:44,967 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:04:44,975 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 13:04:44,996 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-dot-product.wvr.c[2865,2878] [2023-09-01 13:04:45,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:04:45,007 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:04:45,007 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:04:45,013 INFO L208 MainTranslator]: Completed translation [2023-09-01 13:04:45,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:45 WrapperNode [2023-09-01 13:04:45,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 13:04:45,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 13:04:45,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 13:04:45,016 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 13:04:45,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:45" (1/1) ... [2023-09-01 13:04:45,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:45" (1/1) ... [2023-09-01 13:04:45,056 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 280 [2023-09-01 13:04:45,057 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 13:04:45,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 13:04:45,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 13:04:45,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 13:04:45,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:45" (1/1) ... [2023-09-01 13:04:45,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:45" (1/1) ... [2023-09-01 13:04:45,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:45" (1/1) ... [2023-09-01 13:04:45,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:45" (1/1) ... [2023-09-01 13:04:45,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:45" (1/1) ... [2023-09-01 13:04:45,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:45" (1/1) ... [2023-09-01 13:04:45,084 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:45" (1/1) ... [2023-09-01 13:04:45,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:45" (1/1) ... [2023-09-01 13:04:45,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 13:04:45,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 13:04:45,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 13:04:45,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 13:04:45,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:45" (1/1) ... [2023-09-01 13:04:45,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:04:45,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:04:45,128 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 13:04:45,131 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 13:04:45,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 13:04:45,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 13:04:45,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 13:04:45,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 13:04:45,161 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 13:04:45,161 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 13:04:45,162 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 13:04:45,162 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 13:04:45,162 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 13:04:45,162 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 13:04:45,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 13:04:45,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 13:04:45,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 13:04:45,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 13:04:45,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 13:04:45,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 13:04:45,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 13:04:45,165 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 13:04:45,268 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 13:04:45,269 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 13:04:45,663 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 13:04:45,810 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 13:04:45,810 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-09-01 13:04:45,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:04:45 BoogieIcfgContainer [2023-09-01 13:04:45,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 13:04:45,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 13:04:45,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 13:04:45,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 13:04:45,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:04:44" (1/3) ... [2023-09-01 13:04:45,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea7212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:04:45, skipping insertion in model container [2023-09-01 13:04:45,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:45" (2/3) ... [2023-09-01 13:04:45,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea7212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:04:45, skipping insertion in model container [2023-09-01 13:04:45,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:04:45" (3/3) ... [2023-09-01 13:04:45,822 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2023-09-01 13:04:45,829 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 13:04:45,838 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 13:04:45,839 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 13:04:45,839 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 13:04:45,927 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 13:04:45,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 239 transitions, 502 flow [2023-09-01 13:04:46,090 INFO L130 PetriNetUnfolder]: 25/236 cut-off events. [2023-09-01 13:04:46,090 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:04:46,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 236 events. 25/236 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 310 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 182. Up to 2 conditions per place. [2023-09-01 13:04:46,097 INFO L82 GeneralOperation]: Start removeDead. Operand has 224 places, 239 transitions, 502 flow [2023-09-01 13:04:46,107 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 226 transitions, 470 flow [2023-09-01 13:04:46,111 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 13:04:46,123 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 226 transitions, 470 flow [2023-09-01 13:04:46,127 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 226 transitions, 470 flow [2023-09-01 13:04:46,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 226 transitions, 470 flow [2023-09-01 13:04:46,172 INFO L130 PetriNetUnfolder]: 25/226 cut-off events. [2023-09-01 13:04:46,172 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:04:46,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 226 events. 25/226 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 307 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 182. Up to 2 conditions per place. [2023-09-01 13:04:46,179 INFO L119 LiptonReduction]: Number of co-enabled transitions 6720 [2023-09-01 13:04:52,484 INFO L134 LiptonReduction]: Checked pairs total: 7402 [2023-09-01 13:04:52,484 INFO L136 LiptonReduction]: Total number of compositions: 236 [2023-09-01 13:04:52,494 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 13:04:52,499 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;@7bddcccd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 13:04:52,499 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 13:04:52,509 INFO L130 PetriNetUnfolder]: 8/33 cut-off events. [2023-09-01 13:04:52,509 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:04:52,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:52,510 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] [2023-09-01 13:04:52,510 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 13:04:52,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:52,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1808989783, now seen corresponding path program 1 times [2023-09-01 13:04:52,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:52,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627417206] [2023-09-01 13:04:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:52,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:53,029 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 13:04:53,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:53,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627417206] [2023-09-01 13:04:53,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627417206] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:04:53,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:04:53,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:04:53,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79207926] [2023-09-01 13:04:53,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:04:53,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:04:53,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:53,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:04:53,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:04:53,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 475 [2023-09-01 13:04:53,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:53,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:53,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 475 [2023-09-01 13:04:53,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:53,384 INFO L130 PetriNetUnfolder]: 1162/1537 cut-off events. [2023-09-01 13:04:53,385 INFO L131 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2023-09-01 13:04:53,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3168 conditions, 1537 events. 1162/1537 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5522 event pairs, 394 based on Foata normal form. 0/1016 useless extension candidates. Maximal degree in co-relation 2710. Up to 899 conditions per place. [2023-09-01 13:04:53,401 INFO L137 encePairwiseOnDemand]: 470/475 looper letters, 44 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2023-09-01 13:04:53,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 220 flow [2023-09-01 13:04:53,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:04:53,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:04:53,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 869 transitions. [2023-09-01 13:04:53,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573684210526316 [2023-09-01 13:04:53,417 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 869 transitions. [2023-09-01 13:04:53,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 869 transitions. [2023-09-01 13:04:53,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:53,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 869 transitions. [2023-09-01 13:04:53,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:53,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 475.0) internal successors, (2375), 5 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:53,436 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 475.0) internal successors, (2375), 5 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:53,437 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 86 flow. Second operand 4 states and 869 transitions. [2023-09-01 13:04:53,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 220 flow [2023-09-01 13:04:53,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 204 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 13:04:53,445 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 95 flow [2023-09-01 13:04:53,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-09-01 13:04:53,451 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2023-09-01 13:04:53,452 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 95 flow [2023-09-01 13:04:53,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:53,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:53,455 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 13:04:53,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 13:04:53,456 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 13:04:53,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:53,464 INFO L85 PathProgramCache]: Analyzing trace with hash -120965922, now seen corresponding path program 1 times [2023-09-01 13:04:53,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:53,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832696393] [2023-09-01 13:04:53,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:53,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:04:53,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:53,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832696393] [2023-09-01 13:04:53,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832696393] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:04:53,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:04:53,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 13:04:53,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433347202] [2023-09-01 13:04:53,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:04:53,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:04:53,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:53,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:04:53,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:04:53,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 475 [2023-09-01 13:04:53,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:53,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:53,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 475 [2023-09-01 13:04:53,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:53,972 INFO L130 PetriNetUnfolder]: 1930/2561 cut-off events. [2023-09-01 13:04:53,972 INFO L131 PetriNetUnfolder]: For 392/570 co-relation queries the response was YES. [2023-09-01 13:04:53,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5940 conditions, 2561 events. 1930/2561 cut-off events. For 392/570 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10098 event pairs, 519 based on Foata normal form. 179/2075 useless extension candidates. Maximal degree in co-relation 1614. Up to 1436 conditions per place. [2023-09-01 13:04:53,985 INFO L137 encePairwiseOnDemand]: 470/475 looper letters, 52 selfloop transitions, 4 changer transitions 1/60 dead transitions. [2023-09-01 13:04:53,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 60 transitions, 276 flow [2023-09-01 13:04:53,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:04:53,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:04:53,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 686 transitions. [2023-09-01 13:04:53,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48140350877192983 [2023-09-01 13:04:53,988 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 686 transitions. [2023-09-01 13:04:53,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 686 transitions. [2023-09-01 13:04:53,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:53,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 686 transitions. [2023-09-01 13:04:53,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:53,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 475.0) internal successors, (1900), 4 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:53,993 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 475.0) internal successors, (1900), 4 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:53,993 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 95 flow. Second operand 3 states and 686 transitions. [2023-09-01 13:04:53,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 60 transitions, 276 flow [2023-09-01 13:04:53,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 60 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 13:04:53,998 INFO L231 Difference]: Finished difference. Result has 36 places, 38 transitions, 117 flow [2023-09-01 13:04:53,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=36, PETRI_TRANSITIONS=38} [2023-09-01 13:04:53,999 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2023-09-01 13:04:53,999 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 38 transitions, 117 flow [2023-09-01 13:04:54,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:54,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:54,000 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] [2023-09-01 13:04:54,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 13:04:54,001 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 13:04:54,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:54,001 INFO L85 PathProgramCache]: Analyzing trace with hash 568274986, now seen corresponding path program 1 times [2023-09-01 13:04:54,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:54,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278177168] [2023-09-01 13:04:54,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:54,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:54,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:54,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278177168] [2023-09-01 13:04:54,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278177168] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:04:54,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:04:54,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:04:54,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714652582] [2023-09-01 13:04:54,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:04:54,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:04:54,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:54,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:04:54,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:04:54,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 475 [2023-09-01 13:04:54,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 38 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 196.4) internal successors, (982), 5 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:54,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:54,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 475 [2023-09-01 13:04:54,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:54,948 INFO L130 PetriNetUnfolder]: 4453/5922 cut-off events. [2023-09-01 13:04:54,948 INFO L131 PetriNetUnfolder]: For 1504/1504 co-relation queries the response was YES. [2023-09-01 13:04:54,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14415 conditions, 5922 events. 4453/5922 cut-off events. For 1504/1504 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 26577 event pairs, 2338 based on Foata normal form. 122/4506 useless extension candidates. Maximal degree in co-relation 6160. Up to 3038 conditions per place. [2023-09-01 13:04:54,977 INFO L137 encePairwiseOnDemand]: 469/475 looper letters, 78 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2023-09-01 13:04:54,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 86 transitions, 426 flow [2023-09-01 13:04:54,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:04:54,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:04:54,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1036 transitions. [2023-09-01 13:04:54,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362105263157895 [2023-09-01 13:04:54,980 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1036 transitions. [2023-09-01 13:04:54,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1036 transitions. [2023-09-01 13:04:54,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:54,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1036 transitions. [2023-09-01 13:04:54,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.2) internal successors, (1036), 5 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:54,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:54,989 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:54,989 INFO L175 Difference]: Start difference. First operand has 36 places, 38 transitions, 117 flow. Second operand 5 states and 1036 transitions. [2023-09-01 13:04:54,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 86 transitions, 426 flow [2023-09-01 13:04:54,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 86 transitions, 418 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 13:04:54,998 INFO L231 Difference]: Finished difference. Result has 42 places, 43 transitions, 169 flow [2023-09-01 13:04:54,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=42, PETRI_TRANSITIONS=43} [2023-09-01 13:04:54,999 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2023-09-01 13:04:55,000 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 43 transitions, 169 flow [2023-09-01 13:04:55,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.4) internal successors, (982), 5 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:55,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:55,001 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] [2023-09-01 13:04:55,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 13:04:55,001 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 13:04:55,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:55,002 INFO L85 PathProgramCache]: Analyzing trace with hash 637640884, now seen corresponding path program 1 times [2023-09-01 13:04:55,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:55,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022987542] [2023-09-01 13:04:55,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:55,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:55,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:55,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022987542] [2023-09-01 13:04:55,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022987542] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:04:55,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420381919] [2023-09-01 13:04:55,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:55,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:04:55,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:04:55,181 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 13:04:55,188 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 13:04:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:55,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 13:04:55,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:04:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:55,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:04:55,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 7 [2023-09-01 13:04:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:55,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420381919] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:04:55,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:04:55,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2023-09-01 13:04:55,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442236377] [2023-09-01 13:04:55,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:04:55,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 13:04:55,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:55,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 13:04:55,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-09-01 13:04:56,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 475 [2023-09-01 13:04:56,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 169 flow. Second operand has 13 states, 13 states have (on average 189.6153846153846) internal successors, (2465), 13 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:56,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:56,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 475 [2023-09-01 13:04:56,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:57,056 INFO L130 PetriNetUnfolder]: 6603/8803 cut-off events. [2023-09-01 13:04:57,056 INFO L131 PetriNetUnfolder]: For 3446/3446 co-relation queries the response was YES. [2023-09-01 13:04:57,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22508 conditions, 8803 events. 6603/8803 cut-off events. For 3446/3446 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 42366 event pairs, 3381 based on Foata normal form. 122/6628 useless extension candidates. Maximal degree in co-relation 14940. Up to 3038 conditions per place. [2023-09-01 13:04:57,106 INFO L137 encePairwiseOnDemand]: 469/475 looper letters, 121 selfloop transitions, 11 changer transitions 0/134 dead transitions. [2023-09-01 13:04:57,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 134 transitions, 697 flow [2023-09-01 13:04:57,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 13:04:57,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 13:04:57,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1615 transitions. [2023-09-01 13:04:57,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2023-09-01 13:04:57,110 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1615 transitions. [2023-09-01 13:04:57,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1615 transitions. [2023-09-01 13:04:57,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:57,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1615 transitions. [2023-09-01 13:04:57,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 201.875) internal successors, (1615), 8 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:57,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 475.0) internal successors, (4275), 9 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:57,122 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 475.0) internal successors, (4275), 9 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:57,122 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 169 flow. Second operand 8 states and 1615 transitions. [2023-09-01 13:04:57,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 134 transitions, 697 flow [2023-09-01 13:04:57,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 134 transitions, 693 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 13:04:57,143 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 241 flow [2023-09-01 13:04:57,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=241, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-09-01 13:04:57,144 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 15 predicate places. [2023-09-01 13:04:57,144 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 241 flow [2023-09-01 13:04:57,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 189.6153846153846) internal successors, (2465), 13 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:57,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:57,146 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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 13:04:57,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 13:04:57,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:04:57,352 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 13:04:57,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:57,352 INFO L85 PathProgramCache]: Analyzing trace with hash -963449330, now seen corresponding path program 2 times [2023-09-01 13:04:57,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:57,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492989687] [2023-09-01 13:04:57,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:57,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:57,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:04:57,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:57,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492989687] [2023-09-01 13:04:57,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492989687] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:04:57,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:04:57,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:04:57,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534334799] [2023-09-01 13:04:57,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:04:57,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:04:57,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:57,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:04:57,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:04:57,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 475 [2023-09-01 13:04:57,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 200.6) internal successors, (1003), 5 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:57,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:57,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 475 [2023-09-01 13:04:57,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:58,558 INFO L130 PetriNetUnfolder]: 6604/8808 cut-off events. [2023-09-01 13:04:58,558 INFO L131 PetriNetUnfolder]: For 5547/5547 co-relation queries the response was YES. [2023-09-01 13:04:58,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24128 conditions, 8808 events. 6604/8808 cut-off events. For 5547/5547 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 42154 event pairs, 3131 based on Foata normal form. 3/6504 useless extension candidates. Maximal degree in co-relation 14672. Up to 7287 conditions per place. [2023-09-01 13:04:58,615 INFO L137 encePairwiseOnDemand]: 470/475 looper letters, 61 selfloop transitions, 3 changer transitions 4/70 dead transitions. [2023-09-01 13:04:58,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 447 flow [2023-09-01 13:04:58,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:04:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:04:58,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1031 transitions. [2023-09-01 13:04:58,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4341052631578947 [2023-09-01 13:04:58,620 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1031 transitions. [2023-09-01 13:04:58,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1031 transitions. [2023-09-01 13:04:58,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:58,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1031 transitions. [2023-09-01 13:04:58,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:58,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:58,627 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:58,628 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 241 flow. Second operand 5 states and 1031 transitions. [2023-09-01 13:04:58,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 447 flow [2023-09-01 13:04:58,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 415 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-09-01 13:04:58,662 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 237 flow [2023-09-01 13:04:58,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2023-09-01 13:04:58,665 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2023-09-01 13:04:58,665 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 237 flow [2023-09-01 13:04:58,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 200.6) internal successors, (1003), 5 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:58,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:58,666 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 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 13:04:58,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 13:04:58,667 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 13:04:58,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:58,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1429325870, now seen corresponding path program 1 times [2023-09-01 13:04:58,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:58,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976097072] [2023-09-01 13:04:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:58,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 13:04:58,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:58,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976097072] [2023-09-01 13:04:58,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976097072] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:04:58,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136842998] [2023-09-01 13:04:58,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:58,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:04:58,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:04:58,816 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 13:04:58,818 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 13:04:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:58,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:04:58,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:04:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 13:04:58,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:04:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 13:04:59,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136842998] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:04:59,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:04:59,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-09-01 13:04:59,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73980296] [2023-09-01 13:04:59,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:04:59,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:04:59,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:59,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:04:59,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 13:04:59,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 475 [2023-09-01 13:04:59,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 237 flow. Second operand has 5 states, 5 states have (on average 198.8) internal successors, (994), 5 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:59,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:59,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 475 [2023-09-01 13:04:59,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:59,896 INFO L130 PetriNetUnfolder]: 5990/8152 cut-off events. [2023-09-01 13:04:59,896 INFO L131 PetriNetUnfolder]: For 8947/9589 co-relation queries the response was YES. [2023-09-01 13:04:59,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22769 conditions, 8152 events. 5990/8152 cut-off events. For 8947/9589 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 41270 event pairs, 1923 based on Foata normal form. 642/6955 useless extension candidates. Maximal degree in co-relation 22740. Up to 4077 conditions per place. [2023-09-01 13:04:59,944 INFO L137 encePairwiseOnDemand]: 469/475 looper letters, 66 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2023-09-01 13:04:59,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 509 flow [2023-09-01 13:04:59,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:04:59,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:04:59,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1019 transitions. [2023-09-01 13:04:59,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42905263157894735 [2023-09-01 13:04:59,948 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1019 transitions. [2023-09-01 13:04:59,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1019 transitions. [2023-09-01 13:04:59,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:59,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1019 transitions. [2023-09-01 13:04:59,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 203.8) internal successors, (1019), 5 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:59,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:59,956 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:59,956 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 237 flow. Second operand 5 states and 1019 transitions. [2023-09-01 13:04:59,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 509 flow [2023-09-01 13:04:59,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 497 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 13:04:59,994 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 249 flow [2023-09-01 13:04:59,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2023-09-01 13:04:59,997 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2023-09-01 13:04:59,998 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 249 flow [2023-09-01 13:04:59,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 198.8) internal successors, (994), 5 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:59,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:59,999 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 13:05:00,007 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 13:05:00,204 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 13:05:00,205 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 13:05:00,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:05:00,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1999844878, now seen corresponding path program 1 times [2023-09-01 13:05:00,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:05:00,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899459828] [2023-09-01 13:05:00,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:05:00,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:05:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:05:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:05:00,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:05:00,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899459828] [2023-09-01 13:05:00,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899459828] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:05:00,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:05:00,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:05:00,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903038490] [2023-09-01 13:05:00,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:05:00,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:05:00,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:05:00,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:05:00,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:05:00,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 475 [2023-09-01 13:05:00,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 197.2) internal successors, (986), 5 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:00,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:05:00,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 475 [2023-09-01 13:05:00,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:05:01,384 INFO L130 PetriNetUnfolder]: 6264/8556 cut-off events. [2023-09-01 13:05:01,385 INFO L131 PetriNetUnfolder]: For 9787/10463 co-relation queries the response was YES. [2023-09-01 13:05:01,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26431 conditions, 8556 events. 6264/8556 cut-off events. For 9787/10463 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 42223 event pairs, 3638 based on Foata normal form. 779/8085 useless extension candidates. Maximal degree in co-relation 26401. Up to 5469 conditions per place. [2023-09-01 13:05:01,439 INFO L137 encePairwiseOnDemand]: 467/475 looper letters, 83 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2023-09-01 13:05:01,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 93 transitions, 585 flow [2023-09-01 13:05:01,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:05:01,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:05:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1035 transitions. [2023-09-01 13:05:01,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357894736842105 [2023-09-01 13:05:01,443 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1035 transitions. [2023-09-01 13:05:01,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1035 transitions. [2023-09-01 13:05:01,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:05:01,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1035 transitions. [2023-09-01 13:05:01,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:01,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:01,450 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:01,450 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 249 flow. Second operand 5 states and 1035 transitions. [2023-09-01 13:05:01,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 93 transitions, 585 flow [2023-09-01 13:05:01,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 93 transitions, 575 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 13:05:01,487 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 300 flow [2023-09-01 13:05:01,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=300, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2023-09-01 13:05:01,488 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2023-09-01 13:05:01,488 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 300 flow [2023-09-01 13:05:01,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 197.2) internal successors, (986), 5 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:01,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:05:01,489 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 13:05:01,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 13:05:01,489 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 13:05:01,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:05:01,490 INFO L85 PathProgramCache]: Analyzing trace with hash 800859454, now seen corresponding path program 2 times [2023-09-01 13:05:01,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:05:01,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540993185] [2023-09-01 13:05:01,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:05:01,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:05:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:05:01,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:05:01,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:05:01,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540993185] [2023-09-01 13:05:01,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540993185] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:05:01,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:05:01,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 13:05:01,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767096357] [2023-09-01 13:05:01,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:05:01,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 13:05:01,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:05:01,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 13:05:01,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-09-01 13:05:02,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 475 [2023-09-01 13:05:02,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 300 flow. Second operand has 8 states, 8 states have (on average 190.25) internal successors, (1522), 8 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:02,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:05:02,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 475 [2023-09-01 13:05:02,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:05:02,984 INFO L130 PetriNetUnfolder]: 6520/8911 cut-off events. [2023-09-01 13:05:02,985 INFO L131 PetriNetUnfolder]: For 12687/13385 co-relation queries the response was YES. [2023-09-01 13:05:03,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28906 conditions, 8911 events. 6520/8911 cut-off events. For 12687/13385 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 44134 event pairs, 3696 based on Foata normal form. 788/8394 useless extension candidates. Maximal degree in co-relation 28874. Up to 5466 conditions per place. [2023-09-01 13:05:03,050 INFO L137 encePairwiseOnDemand]: 467/475 looper letters, 83 selfloop transitions, 9 changer transitions 0/94 dead transitions. [2023-09-01 13:05:03,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 94 transitions, 631 flow [2023-09-01 13:05:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 13:05:03,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 13:05:03,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1197 transitions. [2023-09-01 13:05:03,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2023-09-01 13:05:03,055 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1197 transitions. [2023-09-01 13:05:03,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1197 transitions. [2023-09-01 13:05:03,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:05:03,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1197 transitions. [2023-09-01 13:05:03,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:03,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 475.0) internal successors, (3325), 7 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:03,062 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 475.0) internal successors, (3325), 7 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:03,062 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 300 flow. Second operand 6 states and 1197 transitions. [2023-09-01 13:05:03,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 94 transitions, 631 flow [2023-09-01 13:05:03,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 94 transitions, 626 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 13:05:03,099 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 329 flow [2023-09-01 13:05:03,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=329, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2023-09-01 13:05:03,101 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 27 predicate places. [2023-09-01 13:05:03,101 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 329 flow [2023-09-01 13:05:03,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 190.25) internal successors, (1522), 8 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:03,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:05:03,104 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 13:05:03,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 13:05:03,106 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 13:05:03,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:05:03,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1628528424, now seen corresponding path program 3 times [2023-09-01 13:05:03,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:05:03,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036190151] [2023-09-01 13:05:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:05:03,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:05:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:05:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:05:03,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:05:03,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036190151] [2023-09-01 13:05:03,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036190151] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:05:03,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:05:03,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 13:05:03,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20051134] [2023-09-01 13:05:03,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:05:03,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 13:05:03,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:05:03,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 13:05:03,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-09-01 13:05:03,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 475 [2023-09-01 13:05:03,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 329 flow. Second operand has 7 states, 7 states have (on average 189.71428571428572) internal successors, (1328), 7 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:03,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:05:03,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 475 [2023-09-01 13:05:03,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:05:04,769 INFO L130 PetriNetUnfolder]: 5942/8166 cut-off events. [2023-09-01 13:05:04,770 INFO L131 PetriNetUnfolder]: For 15503/16163 co-relation queries the response was YES. [2023-09-01 13:05:04,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27660 conditions, 8166 events. 5942/8166 cut-off events. For 15503/16163 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 40226 event pairs, 3407 based on Foata normal form. 750/7738 useless extension candidates. Maximal degree in co-relation 27626. Up to 5466 conditions per place. [2023-09-01 13:05:04,840 INFO L137 encePairwiseOnDemand]: 468/475 looper letters, 81 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2023-09-01 13:05:04,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 92 transitions, 643 flow [2023-09-01 13:05:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 13:05:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 13:05:04,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1188 transitions. [2023-09-01 13:05:04,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4168421052631579 [2023-09-01 13:05:04,844 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1188 transitions. [2023-09-01 13:05:04,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1188 transitions. [2023-09-01 13:05:04,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:05:04,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1188 transitions. [2023-09-01 13:05:04,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:04,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 475.0) internal successors, (3325), 7 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:04,853 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 475.0) internal successors, (3325), 7 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:04,853 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 329 flow. Second operand 6 states and 1188 transitions. [2023-09-01 13:05:04,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 92 transitions, 643 flow [2023-09-01 13:05:04,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 92 transitions, 630 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 13:05:04,899 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 352 flow [2023-09-01 13:05:04,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=352, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2023-09-01 13:05:04,900 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 29 predicate places. [2023-09-01 13:05:04,900 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 352 flow [2023-09-01 13:05:04,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 189.71428571428572) internal successors, (1328), 7 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:04,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:05:04,901 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, 1] [2023-09-01 13:05:04,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 13:05:04,902 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 13:05:04,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:05:04,902 INFO L85 PathProgramCache]: Analyzing trace with hash -541050982, now seen corresponding path program 1 times [2023-09-01 13:05:04,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:05:04,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061501598] [2023-09-01 13:05:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:05:04,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:05:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:05:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:05:05,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:05:05,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061501598] [2023-09-01 13:05:05,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061501598] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:05:05,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729796943] [2023-09-01 13:05:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:05:05,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:05:05,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:05:05,101 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 13:05:05,124 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 13:05:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:05:05,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 13:05:05,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:05:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:05:05,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:05:05,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 7 [2023-09-01 13:05:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:05:05,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729796943] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:05:05,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:05:05,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 13:05:05,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948927874] [2023-09-01 13:05:05,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:05:05,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 13:05:05,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:05:05,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 13:05:05,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-09-01 13:05:05,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 475 [2023-09-01 13:05:05,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 352 flow. Second operand has 12 states, 12 states have (on average 190.41666666666666) internal successors, (2285), 12 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:05,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:05:05,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 475 [2023-09-01 13:05:05,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:05:06,578 INFO L130 PetriNetUnfolder]: 6213/8517 cut-off events. [2023-09-01 13:05:06,578 INFO L131 PetriNetUnfolder]: For 19639/20355 co-relation queries the response was YES. [2023-09-01 13:05:06,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30147 conditions, 8517 events. 6213/8517 cut-off events. For 19639/20355 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 42354 event pairs, 3393 based on Foata normal form. 819/8092 useless extension candidates. Maximal degree in co-relation 30112. Up to 2836 conditions per place. [2023-09-01 13:05:06,624 INFO L137 encePairwiseOnDemand]: 467/475 looper letters, 117 selfloop transitions, 15 changer transitions 0/134 dead transitions. [2023-09-01 13:05:06,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 134 transitions, 917 flow [2023-09-01 13:05:06,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 13:05:06,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 13:05:06,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1611 transitions. [2023-09-01 13:05:06,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42394736842105263 [2023-09-01 13:05:06,629 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1611 transitions. [2023-09-01 13:05:06,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1611 transitions. [2023-09-01 13:05:06,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:05:06,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1611 transitions. [2023-09-01 13:05:06,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 201.375) internal successors, (1611), 8 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:06,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 475.0) internal successors, (4275), 9 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:06,639 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 475.0) internal successors, (4275), 9 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:06,639 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 352 flow. Second operand 8 states and 1611 transitions. [2023-09-01 13:05:06,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 134 transitions, 917 flow [2023-09-01 13:05:06,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 134 transitions, 894 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-09-01 13:05:06,672 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 418 flow [2023-09-01 13:05:06,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=418, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2023-09-01 13:05:06,673 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2023-09-01 13:05:06,673 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 418 flow [2023-09-01 13:05:06,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 190.41666666666666) internal successors, (2285), 12 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:06,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:05:06,675 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, 1] [2023-09-01 13:05:06,683 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 13:05:06,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:05:06,881 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 13:05:06,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:05:06,882 INFO L85 PathProgramCache]: Analyzing trace with hash -2109067920, now seen corresponding path program 2 times [2023-09-01 13:05:06,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:05:06,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605535838] [2023-09-01 13:05:06,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:05:06,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:05:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:05:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:05:07,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:05:07,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605535838] [2023-09-01 13:05:07,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605535838] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:05:07,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391535342] [2023-09-01 13:05:07,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:05:07,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:05:07,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:05:07,172 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 13:05:07,182 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 13:05:07,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:05:07,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:05:07,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 13:05:07,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:05:07,327 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 202 treesize of output 198 [2023-09-01 13:05:07,425 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 18 treesize of output 20 [2023-09-01 13:05:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:05:07,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:05:07,463 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_376 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_376) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))) (+ |c_thread1Thread1of1ForFork2_~j~0#1| 1))) is different from false [2023-09-01 13:05:07,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 41 treesize of output 25 [2023-09-01 13:05:07,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:05:07,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391535342] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:05:07,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:05:07,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-09-01 13:05:07,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103320084] [2023-09-01 13:05:07,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:05:07,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 13:05:07,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:05:07,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 13:05:07,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=160, Unknown=1, NotChecked=26, Total=240 [2023-09-01 13:05:07,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 475 [2023-09-01 13:05:07,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 418 flow. Second operand has 16 states, 16 states have (on average 152.4375) internal successors, (2439), 16 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 13:05:07,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:05:07,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 475 [2023-09-01 13:05:07,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:05:08,681 INFO L130 PetriNetUnfolder]: 6973/9575 cut-off events. [2023-09-01 13:05:08,681 INFO L131 PetriNetUnfolder]: For 26518/27290 co-relation queries the response was YES. [2023-09-01 13:05:08,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35706 conditions, 9575 events. 6973/9575 cut-off events. For 26518/27290 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 47927 event pairs, 3387 based on Foata normal form. 862/9034 useless extension candidates. Maximal degree in co-relation 35670. Up to 2833 conditions per place. [2023-09-01 13:05:08,739 INFO L137 encePairwiseOnDemand]: 455/475 looper letters, 115 selfloop transitions, 46 changer transitions 0/163 dead transitions. [2023-09-01 13:05:08,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 163 transitions, 1175 flow [2023-09-01 13:05:08,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 13:05:08,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 13:05:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1789 transitions. [2023-09-01 13:05:08,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34239234449760764 [2023-09-01 13:05:08,744 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1789 transitions. [2023-09-01 13:05:08,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1789 transitions. [2023-09-01 13:05:08,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:05:08,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1789 transitions. [2023-09-01 13:05:08,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 162.63636363636363) internal successors, (1789), 11 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:08,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 475.0) internal successors, (5700), 12 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:08,756 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 475.0) internal successors, (5700), 12 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:08,756 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 418 flow. Second operand 11 states and 1789 transitions. [2023-09-01 13:05:08,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 163 transitions, 1175 flow [2023-09-01 13:05:08,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 163 transitions, 1134 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-09-01 13:05:08,824 INFO L231 Difference]: Finished difference. Result has 78 places, 93 transitions, 745 flow [2023-09-01 13:05:08,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=745, PETRI_PLACES=78, PETRI_TRANSITIONS=93} [2023-09-01 13:05:08,825 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 42 predicate places. [2023-09-01 13:05:08,825 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 93 transitions, 745 flow [2023-09-01 13:05:08,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 152.4375) internal successors, (2439), 16 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 13:05:08,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:05:08,826 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, 1] [2023-09-01 13:05:08,831 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 13:05:09,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:05:09,027 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 13:05:09,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:05:09,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1281398950, now seen corresponding path program 3 times [2023-09-01 13:05:09,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:05:09,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913533192] [2023-09-01 13:05:09,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:05:09,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:05:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:05:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:05:09,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:05:09,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913533192] [2023-09-01 13:05:09,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913533192] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:05:09,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029155073] [2023-09-01 13:05:09,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:05:09,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:05:09,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:05:09,325 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 13:05:09,327 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 13:05:09,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 13:05:09,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:05:09,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 13:05:09,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:05:09,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:05:09,773 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 18 treesize of output 20 [2023-09-01 13:05:09,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:05:09,818 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 18 treesize of output 20 [2023-09-01 13:05:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:05:09,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:05:10,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 157 treesize of output 133 [2023-09-01 13:05:10,016 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 27 treesize of output 21 [2023-09-01 13:05:10,028 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 28 treesize of output 16 [2023-09-01 13:05:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:05:10,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029155073] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:05:10,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:05:10,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2023-09-01 13:05:10,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50583501] [2023-09-01 13:05:10,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:05:10,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 13:05:10,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:05:10,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 13:05:10,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=340, Unknown=6, NotChecked=0, Total=420 [2023-09-01 13:05:12,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:05:14,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:05:16,699 WARN L539 Checker$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 13:05:18,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:05:20,833 WARN L539 Checker$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 13:05:22,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:05:25,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:05:27,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:05:29,181 WARN L539 Checker$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 13:05:29,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 475 [2023-09-01 13:05:29,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 93 transitions, 745 flow. Second operand has 21 states, 21 states have (on average 149.42857142857142) internal successors, (3138), 21 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:29,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:05:29,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 475 [2023-09-01 13:05:29,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:05:30,109 INFO L130 PetriNetUnfolder]: 6365/8790 cut-off events. [2023-09-01 13:05:30,110 INFO L131 PetriNetUnfolder]: For 30415/31227 co-relation queries the response was YES. [2023-09-01 13:05:30,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43737 conditions, 8790 events. 6365/8790 cut-off events. For 30415/31227 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 43279 event pairs, 3098 based on Foata normal form. 828/8345 useless extension candidates. Maximal degree in co-relation 43697. Up to 4927 conditions per place. [2023-09-01 13:05:30,160 INFO L137 encePairwiseOnDemand]: 468/475 looper letters, 144 selfloop transitions, 18 changer transitions 0/164 dead transitions. [2023-09-01 13:05:30,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 164 transitions, 1516 flow [2023-09-01 13:05:30,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:05:30,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:05:30,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1434 transitions. [2023-09-01 13:05:30,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3354385964912281 [2023-09-01 13:05:30,165 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1434 transitions. [2023-09-01 13:05:30,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1434 transitions. [2023-09-01 13:05:30,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:05:30,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1434 transitions. [2023-09-01 13:05:30,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 159.33333333333334) internal successors, (1434), 9 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 13:05:30,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 475.0) internal successors, (4750), 10 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:30,174 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 475.0) internal successors, (4750), 10 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:30,174 INFO L175 Difference]: Start difference. First operand has 78 places, 93 transitions, 745 flow. Second operand 9 states and 1434 transitions. [2023-09-01 13:05:30,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 164 transitions, 1516 flow [2023-09-01 13:05:30,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 164 transitions, 1481 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-09-01 13:05:30,244 INFO L231 Difference]: Finished difference. Result has 80 places, 94 transitions, 769 flow [2023-09-01 13:05:30,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=769, PETRI_PLACES=80, PETRI_TRANSITIONS=94} [2023-09-01 13:05:30,244 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 44 predicate places. [2023-09-01 13:05:30,244 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 94 transitions, 769 flow [2023-09-01 13:05:30,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 149.42857142857142) internal successors, (3138), 21 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:30,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:05:30,245 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 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 13:05:30,250 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 13:05:30,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 13:05:30,446 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 13:05:30,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:05:30,446 INFO L85 PathProgramCache]: Analyzing trace with hash -935293517, now seen corresponding path program 1 times [2023-09-01 13:05:30,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:05:30,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041908324] [2023-09-01 13:05:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:05:30,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:05:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:05:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:05:31,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:05:31,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041908324] [2023-09-01 13:05:31,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041908324] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:05:31,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315608792] [2023-09-01 13:05:31,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:05:31,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:05:31,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:05:31,108 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 13:05:31,110 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 13:05:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:05:31,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 13:05:31,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:05:31,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:05:31,556 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 13:05:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:05:31,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:05:31,767 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_487 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_487) c_~A~0.base) (+ c_~A~0.offset (* 4 c_~M~0))) 1)) is different from false [2023-09-01 13:05:31,778 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:05:31,778 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 41 treesize of output 33 [2023-09-01 13:05:31,783 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 9 treesize of output 3 [2023-09-01 13:05:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:05:32,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315608792] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:05:32,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:05:32,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 34 [2023-09-01 13:05:32,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199319097] [2023-09-01 13:05:32,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:05:32,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 13:05:32,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:05:32,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 13:05:32,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1017, Unknown=1, NotChecked=64, Total=1190 [2023-09-01 13:05:32,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 475 [2023-09-01 13:05:32,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 769 flow. Second operand has 35 states, 35 states have (on average 137.0) internal successors, (4795), 35 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:32,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:05:32,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 475 [2023-09-01 13:05:32,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:05:38,702 INFO L130 PetriNetUnfolder]: 33140/45583 cut-off events. [2023-09-01 13:05:38,702 INFO L131 PetriNetUnfolder]: For 183726/183726 co-relation queries the response was YES. [2023-09-01 13:05:38,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233256 conditions, 45583 events. 33140/45583 cut-off events. For 183726/183726 co-relation queries the response was YES. Maximal size of possible extension queue 1514. Compared 270185 event pairs, 5215 based on Foata normal form. 168/40811 useless extension candidates. Maximal degree in co-relation 158746. Up to 21924 conditions per place. [2023-09-01 13:05:39,015 INFO L137 encePairwiseOnDemand]: 450/475 looper letters, 786 selfloop transitions, 317 changer transitions 100/1203 dead transitions. [2023-09-01 13:05:39,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 1203 transitions, 12578 flow [2023-09-01 13:05:39,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 13:05:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 13:05:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5493 transitions. [2023-09-01 13:05:39,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125462304409673 [2023-09-01 13:05:39,033 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5493 transitions. [2023-09-01 13:05:39,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5493 transitions. [2023-09-01 13:05:39,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:05:39,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5493 transitions. [2023-09-01 13:05:39,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 148.45945945945945) internal successors, (5493), 37 states have internal predecessors, (5493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:39,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 475.0) internal successors, (18050), 38 states have internal predecessors, (18050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:39,069 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 475.0) internal successors, (18050), 38 states have internal predecessors, (18050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:39,070 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 769 flow. Second operand 37 states and 5493 transitions. [2023-09-01 13:05:39,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 1203 transitions, 12578 flow [2023-09-01 13:05:40,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 1203 transitions, 12125 flow, removed 72 selfloop flow, removed 7 redundant places. [2023-09-01 13:05:40,048 INFO L231 Difference]: Finished difference. Result has 133 places, 420 transitions, 5476 flow [2023-09-01 13:05:40,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=5476, PETRI_PLACES=133, PETRI_TRANSITIONS=420} [2023-09-01 13:05:40,049 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 97 predicate places. [2023-09-01 13:05:40,049 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 420 transitions, 5476 flow [2023-09-01 13:05:40,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 137.0) internal successors, (4795), 35 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:40,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:05:40,051 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 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 13:05:40,059 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 13:05:40,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:05:40,257 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 13:05:40,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:05:40,257 INFO L85 PathProgramCache]: Analyzing trace with hash 792253339, now seen corresponding path program 2 times [2023-09-01 13:05:40,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:05:40,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35094454] [2023-09-01 13:05:40,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:05:40,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:05:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:05:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:05:41,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:05:41,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35094454] [2023-09-01 13:05:41,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35094454] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:05:41,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524849371] [2023-09-01 13:05:41,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:05:41,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:05:41,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:05:41,102 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 13:05:41,105 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 13:05:41,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:05:41,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:05:41,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 13:05:41,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:05:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:05:41,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:05:41,629 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:05:41,630 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 19 treesize of output 15 [2023-09-01 13:05:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:05:41,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524849371] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:05:41,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:05:41,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2023-09-01 13:05:41,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842385485] [2023-09-01 13:05:41,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:05:41,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 13:05:41,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:05:41,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 13:05:41,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2023-09-01 13:05:44,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 475 [2023-09-01 13:05:44,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 420 transitions, 5476 flow. Second operand has 30 states, 30 states have (on average 174.3) internal successors, (5229), 30 states have internal predecessors, (5229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:44,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:05:44,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 475 [2023-09-01 13:05:44,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:05:52,568 INFO L130 PetriNetUnfolder]: 26611/37134 cut-off events. [2023-09-01 13:05:52,568 INFO L131 PetriNetUnfolder]: For 558661/558661 co-relation queries the response was YES. [2023-09-01 13:05:52,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285445 conditions, 37134 events. 26611/37134 cut-off events. For 558661/558661 co-relation queries the response was YES. Maximal size of possible extension queue 1232. Compared 221386 event pairs, 6015 based on Foata normal form. 1475/38513 useless extension candidates. Maximal degree in co-relation 263413. Up to 17769 conditions per place. [2023-09-01 13:05:53,122 INFO L137 encePairwiseOnDemand]: 457/475 looper letters, 736 selfloop transitions, 501 changer transitions 424/1661 dead transitions. [2023-09-01 13:05:53,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 1661 transitions, 25517 flow [2023-09-01 13:05:53,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-09-01 13:05:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-09-01 13:05:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 10858 transitions. [2023-09-01 13:05:53,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38098245614035087 [2023-09-01 13:05:53,138 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 10858 transitions. [2023-09-01 13:05:53,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 10858 transitions. [2023-09-01 13:05:53,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:05:53,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 10858 transitions. [2023-09-01 13:05:53,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 180.96666666666667) internal successors, (10858), 60 states have internal predecessors, (10858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:53,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 475.0) internal successors, (28975), 61 states have internal predecessors, (28975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:53,182 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 475.0) internal successors, (28975), 61 states have internal predecessors, (28975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:53,183 INFO L175 Difference]: Start difference. First operand has 133 places, 420 transitions, 5476 flow. Second operand 60 states and 10858 transitions. [2023-09-01 13:05:53,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 1661 transitions, 25517 flow [2023-09-01 13:05:56,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 1661 transitions, 24560 flow, removed 295 selfloop flow, removed 3 redundant places. [2023-09-01 13:05:56,853 INFO L231 Difference]: Finished difference. Result has 234 places, 796 transitions, 11744 flow [2023-09-01 13:05:56,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=5066, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=11744, PETRI_PLACES=234, PETRI_TRANSITIONS=796} [2023-09-01 13:05:56,853 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 198 predicate places. [2023-09-01 13:05:56,853 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 796 transitions, 11744 flow [2023-09-01 13:05:56,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 174.3) internal successors, (5229), 30 states have internal predecessors, (5229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:05:56,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:05:56,854 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 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 13:05:56,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-09-01 13:05:57,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:05:57,061 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 13:05:57,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:05:57,061 INFO L85 PathProgramCache]: Analyzing trace with hash -880731739, now seen corresponding path program 3 times [2023-09-01 13:05:57,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:05:57,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805214406] [2023-09-01 13:05:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:05:57,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:05:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:05:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:05:57,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:05:57,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805214406] [2023-09-01 13:05:57,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805214406] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:05:57,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943546231] [2023-09-01 13:05:57,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:05:57,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:05:57,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:05:57,781 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 13:05:57,785 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 13:05:57,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:05:57,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:05:57,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 13:05:57,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:05:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:05:58,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:05:58,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:05:58,316 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 23 treesize of output 15 [2023-09-01 13:05:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:05:58,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943546231] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:05:58,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:05:58,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-09-01 13:05:58,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230103663] [2023-09-01 13:05:58,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:05:58,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 13:05:58,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:05:58,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 13:05:58,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2023-09-01 13:06:00,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 475 [2023-09-01 13:06:00,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 796 transitions, 11744 flow. Second operand has 30 states, 30 states have (on average 173.6) internal successors, (5208), 30 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:06:00,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:06:00,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 475 [2023-09-01 13:06:00,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:06:15,154 INFO L130 PetriNetUnfolder]: 34900/47693 cut-off events. [2023-09-01 13:06:15,154 INFO L131 PetriNetUnfolder]: For 1406199/1406199 co-relation queries the response was YES. [2023-09-01 13:06:15,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432369 conditions, 47693 events. 34900/47693 cut-off events. For 1406199/1406199 co-relation queries the response was YES. Maximal size of possible extension queue 1747. Compared 283381 event pairs, 3862 based on Foata normal form. 140/47593 useless extension candidates. Maximal degree in co-relation 425762. Up to 20582 conditions per place. [2023-09-01 13:06:16,147 INFO L137 encePairwiseOnDemand]: 455/475 looper letters, 1323 selfloop transitions, 1268 changer transitions 114/2705 dead transitions. [2023-09-01 13:06:16,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 2705 transitions, 46578 flow [2023-09-01 13:06:16,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-09-01 13:06:16,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-09-01 13:06:16,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 9045 transitions. [2023-09-01 13:06:16,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38084210526315787 [2023-09-01 13:06:16,158 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 9045 transitions. [2023-09-01 13:06:16,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 9045 transitions. [2023-09-01 13:06:16,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:06:16,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 9045 transitions. [2023-09-01 13:06:16,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 180.9) internal successors, (9045), 50 states have internal predecessors, (9045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:06:16,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 475.0) internal successors, (24225), 51 states have internal predecessors, (24225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:06:16,193 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 475.0) internal successors, (24225), 51 states have internal predecessors, (24225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:06:16,193 INFO L175 Difference]: Start difference. First operand has 234 places, 796 transitions, 11744 flow. Second operand 50 states and 9045 transitions. [2023-09-01 13:06:16,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 2705 transitions, 46578 flow [2023-09-01 13:06:31,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 2705 transitions, 41013 flow, removed 2779 selfloop flow, removed 3 redundant places. [2023-09-01 13:06:31,208 INFO L231 Difference]: Finished difference. Result has 315 places, 1695 transitions, 27600 flow [2023-09-01 13:06:31,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=9903, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=27600, PETRI_PLACES=315, PETRI_TRANSITIONS=1695} [2023-09-01 13:06:31,209 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 279 predicate places. [2023-09-01 13:06:31,209 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 1695 transitions, 27600 flow [2023-09-01 13:06:31,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 173.6) internal successors, (5208), 30 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:06:31,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:06:31,210 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 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 13:06:31,217 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 13:06:31,410 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,SelfDestructingSolverStorable14 [2023-09-01 13:06:31,410 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 13:06:31,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:06:31,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1482880989, now seen corresponding path program 4 times [2023-09-01 13:06:31,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:06:31,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141313898] [2023-09-01 13:06:31,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:06:31,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:06:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:06:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:06:32,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:06:32,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141313898] [2023-09-01 13:06:32,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141313898] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:06:32,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441760085] [2023-09-01 13:06:32,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:06:32,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:06:32,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:06:32,657 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 13:06:32,661 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 13:06:32,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:06:32,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:06:32,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 13:06:32,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:06:33,034 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:06:33,035 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 17 treesize of output 11 [2023-09-01 13:06:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:06:33,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:06:33,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:06:33,276 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 23 treesize of output 15 [2023-09-01 13:06:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:06:33,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441760085] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:06:33,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:06:33,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 30 [2023-09-01 13:06:33,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972427252] [2023-09-01 13:06:33,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:06:33,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 13:06:33,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:06:33,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 13:06:33,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2023-09-01 13:06:36,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 475 [2023-09-01 13:06:36,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 1695 transitions, 27600 flow. Second operand has 30 states, 30 states have (on average 174.23333333333332) internal successors, (5227), 30 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:06:36,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:06:36,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 475 [2023-09-01 13:06:36,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:07:20,911 INFO L130 PetriNetUnfolder]: 79796/108969 cut-off events. [2023-09-01 13:07:20,912 INFO L131 PetriNetUnfolder]: For 4447174/4448160 co-relation queries the response was YES. [2023-09-01 13:07:23,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120646 conditions, 108969 events. 79796/108969 cut-off events. For 4447174/4448160 co-relation queries the response was YES. Maximal size of possible extension queue 4178. Compared 713820 event pairs, 5130 based on Foata normal form. 1034/109988 useless extension candidates. Maximal degree in co-relation 1115365. Up to 46512 conditions per place. [2023-09-01 13:07:24,564 INFO L137 encePairwiseOnDemand]: 458/475 looper letters, 2414 selfloop transitions, 4243 changer transitions 0/6764 dead transitions. [2023-09-01 13:07:24,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 6764 transitions, 127215 flow [2023-09-01 13:07:24,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-09-01 13:07:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2023-09-01 13:07:24,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 18230 transitions. [2023-09-01 13:07:24,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3837894736842105 [2023-09-01 13:07:24,583 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 18230 transitions. [2023-09-01 13:07:24,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 18230 transitions. [2023-09-01 13:07:24,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:07:24,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 18230 transitions. [2023-09-01 13:07:24,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 182.3) internal successors, (18230), 100 states have internal predecessors, (18230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:07:24,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 475.0) internal successors, (47975), 101 states have internal predecessors, (47975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:07:24,649 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 475.0) internal successors, (47975), 101 states have internal predecessors, (47975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:07:24,649 INFO L175 Difference]: Start difference. First operand has 315 places, 1695 transitions, 27600 flow. Second operand 100 states and 18230 transitions. [2023-09-01 13:07:24,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 6764 transitions, 127215 flow [2023-09-01 13:09:30,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 6764 transitions, 120324 flow, removed 2613 selfloop flow, removed 15 redundant places. [2023-09-01 13:09:30,470 INFO L231 Difference]: Finished difference. Result has 466 places, 5133 transitions, 100916 flow [2023-09-01 13:09:30,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=26183, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=100916, PETRI_PLACES=466, PETRI_TRANSITIONS=5133} [2023-09-01 13:09:30,473 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 430 predicate places. [2023-09-01 13:09:30,473 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 5133 transitions, 100916 flow [2023-09-01 13:09:30,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 174.23333333333332) internal successors, (5227), 30 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:09:30,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:09:30,474 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 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 13:09:30,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-09-01 13:09:30,681 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,SelfDestructingSolverStorable15 [2023-09-01 13:09:30,682 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 13:09:30,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:09:30,682 INFO L85 PathProgramCache]: Analyzing trace with hash 277368277, now seen corresponding path program 5 times [2023-09-01 13:09:30,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:09:30,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323154262] [2023-09-01 13:09:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:09:30,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:09:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:09:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:09:32,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:09:32,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323154262] [2023-09-01 13:09:32,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323154262] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:09:32,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601721618] [2023-09-01 13:09:32,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:09:32,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:09:32,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:09:32,034 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 13:09:32,069 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 13:09:32,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 13:09:32,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:09:32,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 13:09:32,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:09:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:09:32,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:09:32,735 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:09:32,736 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 23 treesize of output 15 [2023-09-01 13:09:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:09:33,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601721618] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:09:33,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:09:33,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 35 [2023-09-01 13:09:33,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907494651] [2023-09-01 13:09:33,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:09:33,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-09-01 13:09:33,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:09:33,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-09-01 13:09:33,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2023-09-01 13:09:37,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 475 [2023-09-01 13:09:37,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 5133 transitions, 100916 flow. Second operand has 36 states, 36 states have (on average 164.97222222222223) internal successors, (5939), 36 states have internal predecessors, (5939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:09:37,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:09:37,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 475 [2023-09-01 13:09:37,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:11:35,325 INFO L130 PetriNetUnfolder]: 91421/125279 cut-off events. [2023-09-01 13:11:35,325 INFO L131 PetriNetUnfolder]: For 5563756/5563756 co-relation queries the response was YES. [2023-09-01 13:11:41,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1412408 conditions, 125279 events. 91421/125279 cut-off events. For 5563756/5563756 co-relation queries the response was YES. Maximal size of possible extension queue 4662. Compared 833004 event pairs, 11898 based on Foata normal form. 534/125813 useless extension candidates. Maximal degree in co-relation 1407131. Up to 54207 conditions per place. [2023-09-01 13:11:42,095 INFO L137 encePairwiseOnDemand]: 458/475 looper letters, 3529 selfloop transitions, 4967 changer transitions 0/8496 dead transitions. [2023-09-01 13:11:42,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 8496 transitions, 186655 flow [2023-09-01 13:11:42,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-09-01 13:11:42,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-09-01 13:11:42,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 11122 transitions. [2023-09-01 13:11:42,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602267206477733 [2023-09-01 13:11:42,106 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 11122 transitions. [2023-09-01 13:11:42,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 11122 transitions. [2023-09-01 13:11:42,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:11:42,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 11122 transitions. [2023-09-01 13:11:42,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 171.1076923076923) internal successors, (11122), 65 states have internal predecessors, (11122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:42,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 475.0) internal successors, (31350), 66 states have internal predecessors, (31350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:42,149 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 475.0) internal successors, (31350), 66 states have internal predecessors, (31350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:42,149 INFO L175 Difference]: Start difference. First operand has 466 places, 5133 transitions, 100916 flow. Second operand 65 states and 11122 transitions. [2023-09-01 13:11:42,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 8496 transitions, 186655 flow [2023-09-01 13:17:03,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 8496 transitions, 170778 flow, removed 6478 selfloop flow, removed 7 redundant places. [2023-09-01 13:17:03,628 INFO L231 Difference]: Finished difference. Result has 563 places, 7597 transitions, 155021 flow [2023-09-01 13:17:03,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=93488, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2682, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=155021, PETRI_PLACES=563, PETRI_TRANSITIONS=7597} [2023-09-01 13:17:03,633 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 527 predicate places. [2023-09-01 13:17:03,633 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 7597 transitions, 155021 flow [2023-09-01 13:17:03,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 164.97222222222223) internal successors, (5939), 36 states have internal predecessors, (5939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:03,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:17:03,635 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 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 13:17:03,641 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 13:17:03,840 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,SelfDestructingSolverStorable16 [2023-09-01 13:17:03,840 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 13:17:03,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:17:03,841 INFO L85 PathProgramCache]: Analyzing trace with hash 68083267, now seen corresponding path program 6 times [2023-09-01 13:17:03,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:17:03,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067393221] [2023-09-01 13:17:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:17:03,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:17:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:17:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:17:04,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:17:04,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067393221] [2023-09-01 13:17:04,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067393221] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:17:04,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516972602] [2023-09-01 13:17:04,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:17:04,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:17:04,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:17:04,537 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 13:17:04,540 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 13:17:04,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 13:17:04,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:17:04,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 13:17:04,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:17:05,041 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:17:05,041 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 19 treesize of output 11 [2023-09-01 13:17:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:17:05,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:17:05,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:17:05,211 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 23 treesize of output 15 [2023-09-01 13:17:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:17:05,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516972602] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:17:05,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:17:05,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-09-01 13:17:05,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463184500] [2023-09-01 13:17:05,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:17:05,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 13:17:05,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:17:05,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 13:17:05,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2023-09-01 13:17:07,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 475 [2023-09-01 13:17:07,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 7597 transitions, 155021 flow. Second operand has 29 states, 29 states have (on average 179.31034482758622) internal successors, (5200), 29 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:07,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:17:07,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 475 [2023-09-01 13:17:07,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15