./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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-more-multiply-verify.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 b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 20:55:21,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 20:55:21,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 20:55:22,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 20:55:22,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 20:55:22,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 20:55:22,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 20:55:22,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 20:55:22,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 20:55:22,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 20:55:22,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 20:55:22,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 20:55:22,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 20:55:22,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 20:55:22,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 20:55:22,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 20:55:22,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 20:55:22,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 20:55:22,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 20:55:22,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 20:55:22,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 20:55:22,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 20:55:22,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 20:55:22,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 20:55:22,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 20:55:22,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 20:55:22,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 20:55:22,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 20:55:22,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 20:55:22,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 20:55:22,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 20:55:22,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 20:55:22,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 20:55:22,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 20:55:22,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 20:55:22,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 20:55:22,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 20:55:22,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 20:55:22,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 20:55:22,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 20:55:22,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 20:55:22,086 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 20:55:22,119 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 20:55:22,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 20:55:22,121 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 20:55:22,121 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 20:55:22,122 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 20:55:22,122 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 20:55:22,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 20:55:22,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 20:55:22,123 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 20:55:22,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 20:55:22,124 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 20:55:22,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 20:55:22,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 20:55:22,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 20:55:22,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 20:55:22,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 20:55:22,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 20:55:22,125 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 20:55:22,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 20:55:22,126 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 20:55:22,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 20:55:22,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 20:55:22,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 20:55:22,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 20:55:22,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:55:22,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 20:55:22,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 20:55:22,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 20:55:22,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 20:55:22,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 20:55:22,128 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 20:55:22,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 20:55:22,128 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 20:55:22,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 20:55:22,129 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 20:55:22,129 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 20:55:22,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 20:55:22,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 20:55:22,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 20:55:22,466 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 20:55:22,466 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 20:55:22,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2023-08-30 20:55:23,686 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 20:55:23,859 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 20:55:23,860 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2023-08-30 20:55:23,869 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ccf2546d/95c6b471dd9d4918a93bfecc603d6f2d/FLAGc70dd9c4e [2023-08-30 20:55:23,881 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ccf2546d/95c6b471dd9d4918a93bfecc603d6f2d [2023-08-30 20:55:23,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 20:55:23,884 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 20:55:23,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 20:55:23,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 20:55:23,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 20:55:23,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:55:23" (1/1) ... [2023-08-30 20:55:23,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@796360d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:55:23, skipping insertion in model container [2023-08-30 20:55:23,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:55:23" (1/1) ... [2023-08-30 20:55:23,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 20:55:23,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 20:55:24,059 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-more-multiply-verify.wvr.c[3042,3055] [2023-08-30 20:55:24,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:55:24,074 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 20:55:24,094 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-more-multiply-verify.wvr.c[3042,3055] [2023-08-30 20:55:24,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:55:24,103 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:55:24,103 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:55:24,109 INFO L208 MainTranslator]: Completed translation [2023-08-30 20:55:24,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:55:24 WrapperNode [2023-08-30 20:55:24,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 20:55:24,111 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 20:55:24,111 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 20:55:24,112 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 20:55:24,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:55:24" (1/1) ... [2023-08-30 20:55:24,138 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:55:24" (1/1) ... [2023-08-30 20:55:24,159 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 184 [2023-08-30 20:55:24,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 20:55:24,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 20:55:24,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 20:55:24,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 20:55:24,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:55:24" (1/1) ... [2023-08-30 20:55:24,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:55:24" (1/1) ... [2023-08-30 20:55:24,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:55:24" (1/1) ... [2023-08-30 20:55:24,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:55:24" (1/1) ... [2023-08-30 20:55:24,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:55:24" (1/1) ... [2023-08-30 20:55:24,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:55:24" (1/1) ... [2023-08-30 20:55:24,198 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:55:24" (1/1) ... [2023-08-30 20:55:24,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:55:24" (1/1) ... [2023-08-30 20:55:24,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 20:55:24,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 20:55:24,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 20:55:24,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 20:55:24,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:55:24" (1/1) ... [2023-08-30 20:55:24,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:55:24,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:55:24,229 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) [2023-08-30 20:55:24,255 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 [2023-08-30 20:55:24,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 20:55:24,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 20:55:24,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 20:55:24,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 20:55:24,283 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 20:55:24,283 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 20:55:24,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 20:55:24,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 20:55:24,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 20:55:24,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 20:55:24,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 20:55:24,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 20:55:24,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 20:55:24,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 20:55:24,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 20:55:24,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 20:55:24,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 20:55:24,287 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 20:55:24,373 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 20:55:24,375 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 20:55:24,802 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 20:55:24,931 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 20:55:24,931 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 20:55:24,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:55:24 BoogieIcfgContainer [2023-08-30 20:55:24,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 20:55:24,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 20:55:24,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 20:55:24,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 20:55:24,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 08:55:23" (1/3) ... [2023-08-30 20:55:24,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b986e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:55:24, skipping insertion in model container [2023-08-30 20:55:24,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:55:24" (2/3) ... [2023-08-30 20:55:24,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b986e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:55:24, skipping insertion in model container [2023-08-30 20:55:24,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:55:24" (3/3) ... [2023-08-30 20:55:24,940 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2023-08-30 20:55:24,947 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 20:55:24,955 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 20:55:24,956 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 20:55:24,956 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 20:55:25,023 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 20:55:25,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 149 transitions, 322 flow [2023-08-30 20:55:25,171 INFO L130 PetriNetUnfolder]: 9/146 cut-off events. [2023-08-30 20:55:25,171 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:55:25,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 146 events. 9/146 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 88 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2023-08-30 20:55:25,177 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 149 transitions, 322 flow [2023-08-30 20:55:25,185 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 136 transitions, 290 flow [2023-08-30 20:55:25,188 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 20:55:25,196 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 136 transitions, 290 flow [2023-08-30 20:55:25,198 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 136 transitions, 290 flow [2023-08-30 20:55:25,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 136 transitions, 290 flow [2023-08-30 20:55:25,222 INFO L130 PetriNetUnfolder]: 9/136 cut-off events. [2023-08-30 20:55:25,222 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:55:25,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 136 events. 9/136 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 89 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2023-08-30 20:55:25,225 INFO L119 LiptonReduction]: Number of co-enabled transitions 1464 [2023-08-30 20:55:29,658 INFO L134 LiptonReduction]: Checked pairs total: 1540 [2023-08-30 20:55:29,659 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-08-30 20:55:29,676 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 20:55:29,683 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;@29123eee, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 20:55:29,684 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 20:55:29,690 INFO L130 PetriNetUnfolder]: 3/21 cut-off events. [2023-08-30 20:55:29,690 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:55:29,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:55:29,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:55:29,692 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)] === [2023-08-30 20:55:29,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:55:29,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1628863720, now seen corresponding path program 1 times [2023-08-30 20:55:29,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:55:29,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187829527] [2023-08-30 20:55:29,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:55:29,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:55:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:55:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:55:30,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:55:30,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187829527] [2023-08-30 20:55:30,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187829527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:55:30,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:55:30,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 20:55:30,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381154483] [2023-08-30 20:55:30,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:55:30,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:55:30,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:55:30,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:55:30,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:55:30,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 279 [2023-08-30 20:55:30,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 131.75) internal successors, (527), 4 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:30,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:55:30,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 279 [2023-08-30 20:55:30,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:55:30,451 INFO L130 PetriNetUnfolder]: 169/271 cut-off events. [2023-08-30 20:55:30,452 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-30 20:55:30,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 271 events. 169/271 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 667 event pairs, 108 based on Foata normal form. 8/235 useless extension candidates. Maximal degree in co-relation 372. Up to 217 conditions per place. [2023-08-30 20:55:30,458 INFO L137 encePairwiseOnDemand]: 273/279 looper letters, 21 selfloop transitions, 2 changer transitions 11/34 dead transitions. [2023-08-30 20:55:30,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 163 flow [2023-08-30 20:55:30,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:55:30,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:55:30,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 545 transitions. [2023-08-30 20:55:30,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883512544802867 [2023-08-30 20:55:30,480 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 545 transitions. [2023-08-30 20:55:30,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 545 transitions. [2023-08-30 20:55:30,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:55:30,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 545 transitions. [2023-08-30 20:55:30,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.25) internal successors, (545), 4 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:30,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 279.0) internal successors, (1395), 5 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:30,499 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 279.0) internal successors, (1395), 5 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:30,501 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 62 flow. Second operand 4 states and 545 transitions. [2023-08-30 20:55:30,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 163 flow [2023-08-30 20:55:30,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 145 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 20:55:30,506 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 68 flow [2023-08-30 20:55:30,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2023-08-30 20:55:30,511 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-08-30 20:55:30,512 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 68 flow [2023-08-30 20:55:30,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.75) internal successors, (527), 4 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:30,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:55:30,516 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] [2023-08-30 20:55:30,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 20:55:30,517 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)] === [2023-08-30 20:55:30,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:55:30,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1588577435, now seen corresponding path program 1 times [2023-08-30 20:55:30,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:55:30,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494974126] [2023-08-30 20:55:30,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:55:30,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:55:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:55:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:55:30,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:55:30,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494974126] [2023-08-30 20:55:30,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494974126] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:55:30,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205538889] [2023-08-30 20:55:30,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:55:30,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:55:30,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:55:30,829 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) [2023-08-30 20:55:30,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 20:55:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:55:30,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:55:30,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:55:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:55:31,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:55:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:55:31,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205538889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:55:31,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:55:31,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2023-08-30 20:55:31,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150102267] [2023-08-30 20:55:31,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:55:31,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 20:55:31,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:55:31,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 20:55:31,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-08-30 20:55:31,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 279 [2023-08-30 20:55:31,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 68 flow. Second operand has 14 states, 14 states have (on average 124.07142857142857) internal successors, (1737), 14 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:31,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:55:31,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 279 [2023-08-30 20:55:31,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:55:31,732 INFO L130 PetriNetUnfolder]: 203/328 cut-off events. [2023-08-30 20:55:31,732 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-08-30 20:55:31,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779 conditions, 328 events. 203/328 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 907 event pairs, 108 based on Foata normal form. 30/356 useless extension candidates. Maximal degree in co-relation 767. Up to 217 conditions per place. [2023-08-30 20:55:31,735 INFO L137 encePairwiseOnDemand]: 273/279 looper letters, 21 selfloop transitions, 3 changer transitions 24/48 dead transitions. [2023-08-30 20:55:31,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 48 transitions, 228 flow [2023-08-30 20:55:31,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 20:55:31,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 20:55:31,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 778 transitions. [2023-08-30 20:55:31,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647550776583035 [2023-08-30 20:55:31,738 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 778 transitions. [2023-08-30 20:55:31,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 778 transitions. [2023-08-30 20:55:31,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:55:31,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 778 transitions. [2023-08-30 20:55:31,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 129.66666666666666) internal successors, (778), 6 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:31,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 279.0) internal successors, (1953), 7 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:31,744 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 279.0) internal successors, (1953), 7 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:31,744 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 68 flow. Second operand 6 states and 778 transitions. [2023-08-30 20:55:31,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 48 transitions, 228 flow [2023-08-30 20:55:31,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 48 transitions, 224 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 20:55:31,746 INFO L231 Difference]: Finished difference. Result has 34 places, 24 transitions, 92 flow [2023-08-30 20:55:31,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=92, PETRI_PLACES=34, PETRI_TRANSITIONS=24} [2023-08-30 20:55:31,747 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-08-30 20:55:31,748 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 24 transitions, 92 flow [2023-08-30 20:55:31,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 124.07142857142857) internal successors, (1737), 14 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:31,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:55:31,749 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] [2023-08-30 20:55:31,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 20:55:31,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:55:31,955 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)] === [2023-08-30 20:55:31,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:55:31,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1843269852, now seen corresponding path program 2 times [2023-08-30 20:55:31,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:55:31,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116598765] [2023-08-30 20:55:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:55:31,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:55:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:55:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:55:34,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:55:34,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116598765] [2023-08-30 20:55:34,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116598765] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:55:34,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405517174] [2023-08-30 20:55:34,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:55:34,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:55:34,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:55:34,475 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) [2023-08-30 20:55:34,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 20:55:34,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 20:55:34,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:55:34,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 20:55:34,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:55:34,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:55:34,834 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 21 treesize of output 23 [2023-08-30 20:55:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:55:35,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 20:55:35,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405517174] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:55:35,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 20:55:35,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2023-08-30 20:55:35,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990599381] [2023-08-30 20:55:35,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:55:35,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 20:55:35,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:55:35,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 20:55:35,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2023-08-30 20:55:35,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 279 [2023-08-30 20:55:35,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 24 transitions, 92 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:35,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:55:35,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 279 [2023-08-30 20:55:35,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:55:35,593 INFO L130 PetriNetUnfolder]: 169/288 cut-off events. [2023-08-30 20:55:35,593 INFO L131 PetriNetUnfolder]: For 402/402 co-relation queries the response was YES. [2023-08-30 20:55:35,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 288 events. 169/288 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 855 event pairs, 32 based on Foata normal form. 25/312 useless extension candidates. Maximal degree in co-relation 847. Up to 137 conditions per place. [2023-08-30 20:55:35,595 INFO L137 encePairwiseOnDemand]: 268/279 looper letters, 50 selfloop transitions, 13 changer transitions 13/76 dead transitions. [2023-08-30 20:55:35,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 76 transitions, 405 flow [2023-08-30 20:55:35,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:55:35,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:55:35,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 975 transitions. [2023-08-30 20:55:35,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4368279569892473 [2023-08-30 20:55:35,599 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 975 transitions. [2023-08-30 20:55:35,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 975 transitions. [2023-08-30 20:55:35,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:55:35,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 975 transitions. [2023-08-30 20:55:35,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.875) internal successors, (975), 8 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:35,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:35,606 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:35,607 INFO L175 Difference]: Start difference. First operand has 34 places, 24 transitions, 92 flow. Second operand 8 states and 975 transitions. [2023-08-30 20:55:35,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 76 transitions, 405 flow [2023-08-30 20:55:35,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 76 transitions, 357 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-08-30 20:55:35,610 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 181 flow [2023-08-30 20:55:35,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=181, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-08-30 20:55:35,611 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2023-08-30 20:55:35,611 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 181 flow [2023-08-30 20:55:35,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:35,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:55:35,612 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] [2023-08-30 20:55:35,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 20:55:35,818 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,SelfDestructingSolverStorable2 [2023-08-30 20:55:35,820 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)] === [2023-08-30 20:55:35,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:55:35,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1801503998, now seen corresponding path program 3 times [2023-08-30 20:55:35,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:55:35,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055047512] [2023-08-30 20:55:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:55:35,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:55:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:55:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:55:38,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:55:38,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055047512] [2023-08-30 20:55:38,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055047512] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:55:38,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881658127] [2023-08-30 20:55:38,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:55:38,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:55:38,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:55:38,021 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) [2023-08-30 20:55:38,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 20:55:38,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 20:55:38,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:55:38,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 20:55:38,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:55:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:55:38,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 20:55:38,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881658127] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:55:38,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 20:55:38,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 17 [2023-08-30 20:55:38,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504794310] [2023-08-30 20:55:38,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:55:38,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 20:55:38,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:55:38,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 20:55:38,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:55:38,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 279 [2023-08-30 20:55:38,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 181 flow. Second operand has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:38,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:55:38,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 279 [2023-08-30 20:55:38,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:55:38,711 INFO L130 PetriNetUnfolder]: 245/402 cut-off events. [2023-08-30 20:55:38,712 INFO L131 PetriNetUnfolder]: For 862/862 co-relation queries the response was YES. [2023-08-30 20:55:38,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1495 conditions, 402 events. 245/402 cut-off events. For 862/862 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1271 event pairs, 53 based on Foata normal form. 5/406 useless extension candidates. Maximal degree in co-relation 1480. Up to 215 conditions per place. [2023-08-30 20:55:38,715 INFO L137 encePairwiseOnDemand]: 269/279 looper letters, 52 selfloop transitions, 21 changer transitions 13/86 dead transitions. [2023-08-30 20:55:38,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 86 transitions, 560 flow [2023-08-30 20:55:38,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:55:38,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:55:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1010 transitions. [2023-08-30 20:55:38,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525089605734767 [2023-08-30 20:55:38,719 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1010 transitions. [2023-08-30 20:55:38,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1010 transitions. [2023-08-30 20:55:38,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:55:38,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1010 transitions. [2023-08-30 20:55:38,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.25) internal successors, (1010), 8 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:38,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:38,725 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:38,725 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 181 flow. Second operand 8 states and 1010 transitions. [2023-08-30 20:55:38,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 86 transitions, 560 flow [2023-08-30 20:55:38,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 86 transitions, 524 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-08-30 20:55:38,730 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 341 flow [2023-08-30 20:55:38,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=341, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-08-30 20:55:38,730 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2023-08-30 20:55:38,731 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 341 flow [2023-08-30 20:55:38,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:38,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:55:38,731 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] [2023-08-30 20:55:38,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 20:55:38,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:55:38,939 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)] === [2023-08-30 20:55:38,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:55:38,939 INFO L85 PathProgramCache]: Analyzing trace with hash -516255946, now seen corresponding path program 4 times [2023-08-30 20:55:38,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:55:38,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109660976] [2023-08-30 20:55:38,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:55:38,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:55:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:55:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:55:40,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:55:40,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109660976] [2023-08-30 20:55:40,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109660976] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:55:40,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882854230] [2023-08-30 20:55:40,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:55:40,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:55:40,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:55:40,205 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) [2023-08-30 20:55:40,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 20:55:40,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:55:40,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:55:40,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 20:55:40,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:55:40,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:55:40,690 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 34 treesize of output 34 [2023-08-30 20:55:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:55:40,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:55:41,226 INFO L321 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2023-08-30 20:55:41,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 55 [2023-08-30 20:55:41,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:55:41,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2023-08-30 20:55:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:55:41,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882854230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:55:41,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:55:41,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-30 20:55:41,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12085743] [2023-08-30 20:55:41,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:55:41,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 20:55:41,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:55:41,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 20:55:41,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=806, Unknown=1, NotChecked=0, Total=992 [2023-08-30 20:55:42,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 279 [2023-08-30 20:55:42,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 341 flow. Second operand has 32 states, 32 states have (on average 91.96875) internal successors, (2943), 32 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:42,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:55:42,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 279 [2023-08-30 20:55:42,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:55:48,564 INFO L130 PetriNetUnfolder]: 822/1460 cut-off events. [2023-08-30 20:55:48,565 INFO L131 PetriNetUnfolder]: For 5229/5229 co-relation queries the response was YES. [2023-08-30 20:55:48,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6306 conditions, 1460 events. 822/1460 cut-off events. For 5229/5229 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7461 event pairs, 118 based on Foata normal form. 6/1461 useless extension candidates. Maximal degree in co-relation 6255. Up to 388 conditions per place. [2023-08-30 20:55:48,576 INFO L137 encePairwiseOnDemand]: 266/279 looper letters, 259 selfloop transitions, 86 changer transitions 79/424 dead transitions. [2023-08-30 20:55:48,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 424 transitions, 3019 flow [2023-08-30 20:55:48,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-30 20:55:48,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-30 20:55:48,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 4594 transitions. [2023-08-30 20:55:48,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3503393578891177 [2023-08-30 20:55:48,588 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 4594 transitions. [2023-08-30 20:55:48,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 4594 transitions. [2023-08-30 20:55:48,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:55:48,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 4594 transitions. [2023-08-30 20:55:48,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 97.74468085106383) internal successors, (4594), 47 states have internal predecessors, (4594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:48,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 279.0) internal successors, (13392), 48 states have internal predecessors, (13392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:48,622 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 279.0) internal successors, (13392), 48 states have internal predecessors, (13392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:48,622 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 341 flow. Second operand 47 states and 4594 transitions. [2023-08-30 20:55:48,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 424 transitions, 3019 flow [2023-08-30 20:55:48,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 424 transitions, 2921 flow, removed 49 selfloop flow, removed 1 redundant places. [2023-08-30 20:55:48,646 INFO L231 Difference]: Finished difference. Result has 112 places, 135 transitions, 1302 flow [2023-08-30 20:55:48,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1302, PETRI_PLACES=112, PETRI_TRANSITIONS=135} [2023-08-30 20:55:48,649 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 83 predicate places. [2023-08-30 20:55:48,649 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 135 transitions, 1302 flow [2023-08-30 20:55:48,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 91.96875) internal successors, (2943), 32 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:48,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:55:48,651 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] [2023-08-30 20:55:48,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 20:55:48,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:55:48,856 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)] === [2023-08-30 20:55:48,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:55:48,857 INFO L85 PathProgramCache]: Analyzing trace with hash -701119202, now seen corresponding path program 5 times [2023-08-30 20:55:48,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:55:48,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86887291] [2023-08-30 20:55:48,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:55:48,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:55:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:55:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:55:49,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:55:49,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86887291] [2023-08-30 20:55:49,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86887291] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:55:49,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748963449] [2023-08-30 20:55:49,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:55:49,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:55:49,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:55:49,998 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) [2023-08-30 20:55:50,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 20:55:50,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:55:50,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:55:50,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 20:55:50,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:55:50,557 INFO L321 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2023-08-30 20:55:50,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 41 [2023-08-30 20:55:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:55:50,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:55:50,841 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 20:55:50,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 60 [2023-08-30 20:55:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:55:52,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748963449] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:55:52,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:55:52,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2023-08-30 20:55:52,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182101620] [2023-08-30 20:55:52,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:55:52,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 20:55:52,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:55:52,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 20:55:52,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2023-08-30 20:55:52,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 279 [2023-08-30 20:55:52,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 135 transitions, 1302 flow. Second operand has 30 states, 30 states have (on average 110.1) internal successors, (3303), 30 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:52,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:55:52,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 279 [2023-08-30 20:55:52,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:55:55,283 INFO L130 PetriNetUnfolder]: 952/1727 cut-off events. [2023-08-30 20:55:55,283 INFO L131 PetriNetUnfolder]: For 13283/13283 co-relation queries the response was YES. [2023-08-30 20:55:55,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9168 conditions, 1727 events. 952/1727 cut-off events. For 13283/13283 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9421 event pairs, 221 based on Foata normal form. 1/1723 useless extension candidates. Maximal degree in co-relation 9129. Up to 720 conditions per place. [2023-08-30 20:55:55,299 INFO L137 encePairwiseOnDemand]: 265/279 looper letters, 213 selfloop transitions, 86 changer transitions 14/313 dead transitions. [2023-08-30 20:55:55,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 313 transitions, 3169 flow [2023-08-30 20:55:55,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 20:55:55,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 20:55:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2579 transitions. [2023-08-30 20:55:55,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42016943629846853 [2023-08-30 20:55:55,307 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2579 transitions. [2023-08-30 20:55:55,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2579 transitions. [2023-08-30 20:55:55,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:55:55,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2579 transitions. [2023-08-30 20:55:55,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 117.22727272727273) internal successors, (2579), 22 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:55,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 279.0) internal successors, (6417), 23 states have internal predecessors, (6417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:55,323 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 279.0) internal successors, (6417), 23 states have internal predecessors, (6417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:55,323 INFO L175 Difference]: Start difference. First operand has 112 places, 135 transitions, 1302 flow. Second operand 22 states and 2579 transitions. [2023-08-30 20:55:55,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 313 transitions, 3169 flow [2023-08-30 20:55:55,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 313 transitions, 2651 flow, removed 252 selfloop flow, removed 13 redundant places. [2023-08-30 20:55:55,365 INFO L231 Difference]: Finished difference. Result has 123 places, 185 transitions, 1852 flow [2023-08-30 20:55:55,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1852, PETRI_PLACES=123, PETRI_TRANSITIONS=185} [2023-08-30 20:55:55,367 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 94 predicate places. [2023-08-30 20:55:55,368 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 185 transitions, 1852 flow [2023-08-30 20:55:55,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 110.1) internal successors, (3303), 30 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:55,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:55:55,369 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] [2023-08-30 20:55:55,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 20:55:55,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:55:55,577 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)] === [2023-08-30 20:55:55,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:55:55,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1563406906, now seen corresponding path program 6 times [2023-08-30 20:55:55,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:55:55,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298173401] [2023-08-30 20:55:55,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:55:55,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:55:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:55:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:55:56,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:55:56,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298173401] [2023-08-30 20:55:56,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298173401] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:55:56,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383654394] [2023-08-30 20:55:56,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:55:56,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:55:56,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:55:56,675 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) [2023-08-30 20:55:56,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 20:55:56,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-30 20:55:56,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:55:56,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 20:55:56,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:55:56,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:55:56,979 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 20 treesize of output 22 [2023-08-30 20:55:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:55:57,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 20:55:57,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383654394] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:55:57,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 20:55:57,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2023-08-30 20:55:57,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211115568] [2023-08-30 20:55:57,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:55:57,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 20:55:57,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:55:57,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 20:55:57,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:55:57,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 279 [2023-08-30 20:55:57,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 185 transitions, 1852 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:57,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:55:57,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 279 [2023-08-30 20:55:57,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:55:57,792 INFO L130 PetriNetUnfolder]: 997/1817 cut-off events. [2023-08-30 20:55:57,793 INFO L131 PetriNetUnfolder]: For 15273/15273 co-relation queries the response was YES. [2023-08-30 20:55:57,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10221 conditions, 1817 events. 997/1817 cut-off events. For 15273/15273 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10120 event pairs, 233 based on Foata normal form. 4/1812 useless extension candidates. Maximal degree in co-relation 10135. Up to 1273 conditions per place. [2023-08-30 20:55:57,811 INFO L137 encePairwiseOnDemand]: 269/279 looper letters, 157 selfloop transitions, 67 changer transitions 15/239 dead transitions. [2023-08-30 20:55:57,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 239 transitions, 2791 flow [2023-08-30 20:55:57,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:55:57,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:55:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 971 transitions. [2023-08-30 20:55:57,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4350358422939068 [2023-08-30 20:55:57,814 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 971 transitions. [2023-08-30 20:55:57,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 971 transitions. [2023-08-30 20:55:57,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:55:57,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 971 transitions. [2023-08-30 20:55:57,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.375) internal successors, (971), 8 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:57,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:57,821 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:57,821 INFO L175 Difference]: Start difference. First operand has 123 places, 185 transitions, 1852 flow. Second operand 8 states and 971 transitions. [2023-08-30 20:55:57,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 239 transitions, 2791 flow [2023-08-30 20:55:57,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 239 transitions, 2633 flow, removed 64 selfloop flow, removed 7 redundant places. [2023-08-30 20:55:57,906 INFO L231 Difference]: Finished difference. Result has 127 places, 199 transitions, 2093 flow [2023-08-30 20:55:57,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2093, PETRI_PLACES=127, PETRI_TRANSITIONS=199} [2023-08-30 20:55:57,907 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 98 predicate places. [2023-08-30 20:55:57,907 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 199 transitions, 2093 flow [2023-08-30 20:55:57,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:55:57,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:55:57,914 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] [2023-08-30 20:55:57,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 20:55:58,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:55:58,122 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)] === [2023-08-30 20:55:58,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:55:58,122 INFO L85 PathProgramCache]: Analyzing trace with hash 572239084, now seen corresponding path program 7 times [2023-08-30 20:55:58,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:55:58,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801649196] [2023-08-30 20:55:58,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:55:58,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:55:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:55:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:55:59,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:55:59,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801649196] [2023-08-30 20:55:59,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801649196] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:55:59,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945901671] [2023-08-30 20:55:59,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:55:59,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:55:59,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:55:59,421 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) [2023-08-30 20:55:59,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 20:55:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:55:59,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 20:55:59,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:55:59,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:55:59,915 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 29 treesize of output 29 [2023-08-30 20:56:00,085 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:56:00,087 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:56:00,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 34 [2023-08-30 20:56:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:56:00,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:56:00,397 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 20:56:00,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 89 [2023-08-30 20:56:00,926 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:56:00,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2023-08-30 20:56:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:56:01,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945901671] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:56:01,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:56:01,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 30 [2023-08-30 20:56:01,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483949351] [2023-08-30 20:56:01,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:56:01,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 20:56:01,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:56:01,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 20:56:01,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=874, Unknown=1, NotChecked=0, Total=992 [2023-08-30 20:56:02,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 279 [2023-08-30 20:56:03,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 199 transitions, 2093 flow. Second operand has 32 states, 32 states have (on average 85.84375) internal successors, (2747), 32 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:03,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:56:03,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 279 [2023-08-30 20:56:03,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:56:06,455 INFO L130 PetriNetUnfolder]: 1052/1936 cut-off events. [2023-08-30 20:56:06,455 INFO L131 PetriNetUnfolder]: For 18632/18632 co-relation queries the response was YES. [2023-08-30 20:56:06,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11490 conditions, 1936 events. 1052/1936 cut-off events. For 18632/18632 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11072 event pairs, 225 based on Foata normal form. 1/1928 useless extension candidates. Maximal degree in co-relation 11397. Up to 791 conditions per place. [2023-08-30 20:56:06,469 INFO L137 encePairwiseOnDemand]: 267/279 looper letters, 222 selfloop transitions, 76 changer transitions 15/313 dead transitions. [2023-08-30 20:56:06,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 313 transitions, 3568 flow [2023-08-30 20:56:06,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 20:56:06,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 20:56:06,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1661 transitions. [2023-08-30 20:56:06,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3307447232178415 [2023-08-30 20:56:06,473 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1661 transitions. [2023-08-30 20:56:06,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1661 transitions. [2023-08-30 20:56:06,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:56:06,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1661 transitions. [2023-08-30 20:56:06,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 92.27777777777777) internal successors, (1661), 18 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:06,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 279.0) internal successors, (5301), 19 states have internal predecessors, (5301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:06,484 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 279.0) internal successors, (5301), 19 states have internal predecessors, (5301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:06,484 INFO L175 Difference]: Start difference. First operand has 127 places, 199 transitions, 2093 flow. Second operand 18 states and 1661 transitions. [2023-08-30 20:56:06,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 313 transitions, 3568 flow [2023-08-30 20:56:06,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 313 transitions, 3400 flow, removed 34 selfloop flow, removed 4 redundant places. [2023-08-30 20:56:06,531 INFO L231 Difference]: Finished difference. Result has 144 places, 212 transitions, 2381 flow [2023-08-30 20:56:06,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=1947, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2381, PETRI_PLACES=144, PETRI_TRANSITIONS=212} [2023-08-30 20:56:06,532 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 115 predicate places. [2023-08-30 20:56:06,532 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 212 transitions, 2381 flow [2023-08-30 20:56:06,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 85.84375) internal successors, (2747), 32 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:06,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:56:06,533 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] [2023-08-30 20:56:06,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 20:56:06,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:56:06,739 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)] === [2023-08-30 20:56:06,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:56:06,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2087705102, now seen corresponding path program 8 times [2023-08-30 20:56:06,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:56:06,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974260990] [2023-08-30 20:56:06,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:56:06,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:56:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:56:07,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:56:07,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:56:07,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974260990] [2023-08-30 20:56:07,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974260990] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:56:07,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597689384] [2023-08-30 20:56:07,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:56:07,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:56:07,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:56:07,635 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) [2023-08-30 20:56:07,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 20:56:07,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 20:56:07,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:56:07,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 20:56:07,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:56:07,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:56:07,981 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 34 treesize of output 34 [2023-08-30 20:56:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:56:08,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 20:56:08,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597689384] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:56:08,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 20:56:08,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2023-08-30 20:56:08,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851701926] [2023-08-30 20:56:08,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:56:08,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 20:56:08,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:56:08,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 20:56:08,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:56:08,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 279 [2023-08-30 20:56:08,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 212 transitions, 2381 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:08,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:56:08,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 279 [2023-08-30 20:56:08,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:56:08,729 INFO L130 PetriNetUnfolder]: 1066/1952 cut-off events. [2023-08-30 20:56:08,729 INFO L131 PetriNetUnfolder]: For 19876/19876 co-relation queries the response was YES. [2023-08-30 20:56:08,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11962 conditions, 1952 events. 1066/1952 cut-off events. For 19876/19876 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11115 event pairs, 219 based on Foata normal form. 3/1946 useless extension candidates. Maximal degree in co-relation 11871. Up to 1159 conditions per place. [2023-08-30 20:56:08,745 INFO L137 encePairwiseOnDemand]: 269/279 looper letters, 165 selfloop transitions, 70 changer transitions 22/257 dead transitions. [2023-08-30 20:56:08,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 257 transitions, 3292 flow [2023-08-30 20:56:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:56:08,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:56:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 973 transitions. [2023-08-30 20:56:08,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359318996415771 [2023-08-30 20:56:08,748 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 973 transitions. [2023-08-30 20:56:08,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 973 transitions. [2023-08-30 20:56:08,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:56:08,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 973 transitions. [2023-08-30 20:56:08,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.625) internal successors, (973), 8 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:08,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:08,753 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:08,753 INFO L175 Difference]: Start difference. First operand has 144 places, 212 transitions, 2381 flow. Second operand 8 states and 973 transitions. [2023-08-30 20:56:08,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 257 transitions, 3292 flow [2023-08-30 20:56:08,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 257 transitions, 3198 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-08-30 20:56:08,802 INFO L231 Difference]: Finished difference. Result has 143 places, 209 transitions, 2439 flow [2023-08-30 20:56:08,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2439, PETRI_PLACES=143, PETRI_TRANSITIONS=209} [2023-08-30 20:56:08,803 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 114 predicate places. [2023-08-30 20:56:08,803 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 209 transitions, 2439 flow [2023-08-30 20:56:08,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:08,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:56:08,804 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] [2023-08-30 20:56:08,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 20:56:09,009 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,SelfDestructingSolverStorable8 [2023-08-30 20:56:09,010 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)] === [2023-08-30 20:56:09,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:56:09,010 INFO L85 PathProgramCache]: Analyzing trace with hash -740666688, now seen corresponding path program 9 times [2023-08-30 20:56:09,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:56:09,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122248667] [2023-08-30 20:56:09,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:56:09,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:56:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:56:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:56:10,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:56:10,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122248667] [2023-08-30 20:56:10,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122248667] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:56:10,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614413334] [2023-08-30 20:56:10,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:56:10,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:56:10,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:56:10,699 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) [2023-08-30 20:56:10,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 20:56:10,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 20:56:10,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:56:10,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 20:56:10,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:56:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:56:11,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 20:56:11,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614413334] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:56:11,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 20:56:11,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 17 [2023-08-30 20:56:11,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200687542] [2023-08-30 20:56:11,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:56:11,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 20:56:11,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:56:11,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 20:56:11,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:56:11,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 279 [2023-08-30 20:56:11,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 209 transitions, 2439 flow. Second operand has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:11,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:56:11,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 279 [2023-08-30 20:56:11,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:56:11,516 INFO L130 PetriNetUnfolder]: 1066/1943 cut-off events. [2023-08-30 20:56:11,516 INFO L131 PetriNetUnfolder]: For 21186/21186 co-relation queries the response was YES. [2023-08-30 20:56:11,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12398 conditions, 1943 events. 1066/1943 cut-off events. For 21186/21186 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10976 event pairs, 238 based on Foata normal form. 2/1936 useless extension candidates. Maximal degree in co-relation 12306. Up to 1358 conditions per place. [2023-08-30 20:56:11,533 INFO L137 encePairwiseOnDemand]: 269/279 looper letters, 179 selfloop transitions, 61 changer transitions 14/254 dead transitions. [2023-08-30 20:56:11,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 254 transitions, 3340 flow [2023-08-30 20:56:11,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:56:11,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:56:11,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1003 transitions. [2023-08-30 20:56:11,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44937275985663083 [2023-08-30 20:56:11,536 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1003 transitions. [2023-08-30 20:56:11,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1003 transitions. [2023-08-30 20:56:11,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:56:11,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1003 transitions. [2023-08-30 20:56:11,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 125.375) internal successors, (1003), 8 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) [2023-08-30 20:56:11,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:11,540 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:11,540 INFO L175 Difference]: Start difference. First operand has 143 places, 209 transitions, 2439 flow. Second operand 8 states and 1003 transitions. [2023-08-30 20:56:11,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 254 transitions, 3340 flow [2023-08-30 20:56:11,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 254 transitions, 3189 flow, removed 21 selfloop flow, removed 7 redundant places. [2023-08-30 20:56:11,589 INFO L231 Difference]: Finished difference. Result has 144 places, 221 transitions, 2633 flow [2023-08-30 20:56:11,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=2307, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2633, PETRI_PLACES=144, PETRI_TRANSITIONS=221} [2023-08-30 20:56:11,590 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 115 predicate places. [2023-08-30 20:56:11,590 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 221 transitions, 2633 flow [2023-08-30 20:56:11,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:11,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:56:11,591 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] [2023-08-30 20:56:11,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 20:56:11,793 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,SelfDestructingSolverStorable9 [2023-08-30 20:56:11,793 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)] === [2023-08-30 20:56:11,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:56:11,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1485273708, now seen corresponding path program 10 times [2023-08-30 20:56:11,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:56:11,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073380932] [2023-08-30 20:56:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:56:11,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:56:11,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:56:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:56:13,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:56:13,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073380932] [2023-08-30 20:56:13,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073380932] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:56:13,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527154461] [2023-08-30 20:56:13,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:56:13,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:56:13,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:56:13,389 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) [2023-08-30 20:56:13,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 20:56:13,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:56:13,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:56:13,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 20:56:13,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:56:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:56:13,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:56:13,817 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:56:13,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-08-30 20:56:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:56:14,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527154461] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:56:14,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:56:14,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 7] total 23 [2023-08-30 20:56:14,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32881017] [2023-08-30 20:56:14,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:56:14,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 20:56:14,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:56:14,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 20:56:14,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2023-08-30 20:56:14,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 279 [2023-08-30 20:56:14,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 221 transitions, 2633 flow. Second operand has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:14,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:56:14,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 279 [2023-08-30 20:56:14,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:56:14,740 INFO L130 PetriNetUnfolder]: 1150/2096 cut-off events. [2023-08-30 20:56:14,740 INFO L131 PetriNetUnfolder]: For 23820/23820 co-relation queries the response was YES. [2023-08-30 20:56:14,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13537 conditions, 2096 events. 1150/2096 cut-off events. For 23820/23820 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12057 event pairs, 232 based on Foata normal form. 2/2085 useless extension candidates. Maximal degree in co-relation 13444. Up to 1307 conditions per place. [2023-08-30 20:56:14,754 INFO L137 encePairwiseOnDemand]: 268/279 looper letters, 180 selfloop transitions, 83 changer transitions 16/279 dead transitions. [2023-08-30 20:56:14,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 279 transitions, 3776 flow [2023-08-30 20:56:14,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:56:14,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:56:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1011 transitions. [2023-08-30 20:56:14,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529569892473118 [2023-08-30 20:56:14,763 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1011 transitions. [2023-08-30 20:56:14,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1011 transitions. [2023-08-30 20:56:14,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:56:14,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1011 transitions. [2023-08-30 20:56:14,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.375) internal successors, (1011), 8 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:14,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:14,769 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:14,769 INFO L175 Difference]: Start difference. First operand has 144 places, 221 transitions, 2633 flow. Second operand 8 states and 1011 transitions. [2023-08-30 20:56:14,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 279 transitions, 3776 flow [2023-08-30 20:56:14,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 279 transitions, 3663 flow, removed 34 selfloop flow, removed 3 redundant places. [2023-08-30 20:56:14,832 INFO L231 Difference]: Finished difference. Result has 150 places, 238 transitions, 3000 flow [2023-08-30 20:56:14,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=2526, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3000, PETRI_PLACES=150, PETRI_TRANSITIONS=238} [2023-08-30 20:56:14,833 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 121 predicate places. [2023-08-30 20:56:14,833 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 238 transitions, 3000 flow [2023-08-30 20:56:14,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:14,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:56:14,834 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] [2023-08-30 20:56:14,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 20:56:15,043 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,SelfDestructingSolverStorable10 [2023-08-30 20:56:15,043 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)] === [2023-08-30 20:56:15,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:56:15,044 INFO L85 PathProgramCache]: Analyzing trace with hash -522720116, now seen corresponding path program 11 times [2023-08-30 20:56:15,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:56:15,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219937688] [2023-08-30 20:56:15,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:56:15,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:56:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:56:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:56:17,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:56:17,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219937688] [2023-08-30 20:56:17,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219937688] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:56:17,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860236592] [2023-08-30 20:56:17,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:56:17,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:56:17,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:56:17,225 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) [2023-08-30 20:56:17,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 20:56:17,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:56:17,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:56:17,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 20:56:17,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:56:17,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:56:17,527 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 20 treesize of output 22 [2023-08-30 20:56:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:56:17,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:56:17,816 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_553 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_553) c_~queue~0.base))) (or (not (= (mod (select .cse0 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296) 0)) (let ((.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296)))))) is different from false [2023-08-30 20:56:17,847 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:56:17,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 110 [2023-08-30 20:56:17,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:56:17,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 52 [2023-08-30 20:56:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:56:18,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860236592] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:56:18,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:56:18,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 9] total 29 [2023-08-30 20:56:18,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483753487] [2023-08-30 20:56:18,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:56:18,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 20:56:18,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:56:18,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 20:56:18,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=781, Unknown=5, NotChecked=56, Total=930 [2023-08-30 20:56:18,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 279 [2023-08-30 20:56:18,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 238 transitions, 3000 flow. Second operand has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:18,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:56:18,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 279 [2023-08-30 20:56:18,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:56:20,978 INFO L130 PetriNetUnfolder]: 1231/2263 cut-off events. [2023-08-30 20:56:20,979 INFO L131 PetriNetUnfolder]: For 28500/28500 co-relation queries the response was YES. [2023-08-30 20:56:20,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15262 conditions, 2263 events. 1231/2263 cut-off events. For 28500/28500 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13379 event pairs, 241 based on Foata normal form. 2/2260 useless extension candidates. Maximal degree in co-relation 15163. Up to 1199 conditions per place. [2023-08-30 20:56:21,001 INFO L137 encePairwiseOnDemand]: 266/279 looper letters, 193 selfloop transitions, 110 changer transitions 17/320 dead transitions. [2023-08-30 20:56:21,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 320 transitions, 4467 flow [2023-08-30 20:56:21,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 20:56:21,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 20:56:21,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1108 transitions. [2023-08-30 20:56:21,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3971326164874552 [2023-08-30 20:56:21,003 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1108 transitions. [2023-08-30 20:56:21,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1108 transitions. [2023-08-30 20:56:21,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:56:21,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1108 transitions. [2023-08-30 20:56:21,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 110.8) internal successors, (1108), 10 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:21,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 279.0) internal successors, (3069), 11 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:21,009 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 279.0) internal successors, (3069), 11 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:21,009 INFO L175 Difference]: Start difference. First operand has 150 places, 238 transitions, 3000 flow. Second operand 10 states and 1108 transitions. [2023-08-30 20:56:21,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 320 transitions, 4467 flow [2023-08-30 20:56:21,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 320 transitions, 4364 flow, removed 23 selfloop flow, removed 4 redundant places. [2023-08-30 20:56:21,098 INFO L231 Difference]: Finished difference. Result has 159 places, 262 transitions, 3508 flow [2023-08-30 20:56:21,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=2905, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3508, PETRI_PLACES=159, PETRI_TRANSITIONS=262} [2023-08-30 20:56:21,099 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 130 predicate places. [2023-08-30 20:56:21,099 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 262 transitions, 3508 flow [2023-08-30 20:56:21,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:21,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:56:21,099 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] [2023-08-30 20:56:21,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 20:56:21,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 20:56:21,306 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)] === [2023-08-30 20:56:21,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:56:21,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1034387338, now seen corresponding path program 12 times [2023-08-30 20:56:21,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:56:21,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639930776] [2023-08-30 20:56:21,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:56:21,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:56:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:56:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:56:22,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:56:22,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639930776] [2023-08-30 20:56:22,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639930776] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:56:22,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171896241] [2023-08-30 20:56:22,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:56:22,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:56:22,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:56:22,071 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:56:22,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 20:56:22,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-30 20:56:22,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:56:22,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 20:56:22,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:56:22,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:56:22,355 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 34 treesize of output 34 [2023-08-30 20:56:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:56:22,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 20:56:22,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171896241] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:56:22,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 20:56:22,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2023-08-30 20:56:22,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923057596] [2023-08-30 20:56:22,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:56:22,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 20:56:22,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:56:22,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 20:56:22,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:56:22,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 279 [2023-08-30 20:56:22,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 262 transitions, 3508 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:22,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:56:22,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 279 [2023-08-30 20:56:22,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:56:23,276 INFO L130 PetriNetUnfolder]: 1247/2307 cut-off events. [2023-08-30 20:56:23,276 INFO L131 PetriNetUnfolder]: For 32785/32785 co-relation queries the response was YES. [2023-08-30 20:56:23,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16766 conditions, 2307 events. 1247/2307 cut-off events. For 32785/32785 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13818 event pairs, 253 based on Foata normal form. 11/2313 useless extension candidates. Maximal degree in co-relation 16665. Up to 1524 conditions per place. [2023-08-30 20:56:23,293 INFO L137 encePairwiseOnDemand]: 270/279 looper letters, 206 selfloop transitions, 73 changer transitions 22/301 dead transitions. [2023-08-30 20:56:23,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 301 transitions, 4528 flow [2023-08-30 20:56:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:56:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:56:23,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 965 transitions. [2023-08-30 20:56:23,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43234767025089604 [2023-08-30 20:56:23,295 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 965 transitions. [2023-08-30 20:56:23,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 965 transitions. [2023-08-30 20:56:23,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:56:23,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 965 transitions. [2023-08-30 20:56:23,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.625) internal successors, (965), 8 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:23,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:23,300 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:23,300 INFO L175 Difference]: Start difference. First operand has 159 places, 262 transitions, 3508 flow. Second operand 8 states and 965 transitions. [2023-08-30 20:56:23,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 301 transitions, 4528 flow [2023-08-30 20:56:23,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 301 transitions, 4321 flow, removed 26 selfloop flow, removed 6 redundant places. [2023-08-30 20:56:23,398 INFO L231 Difference]: Finished difference. Result has 162 places, 263 transitions, 3576 flow [2023-08-30 20:56:23,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=3291, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3576, PETRI_PLACES=162, PETRI_TRANSITIONS=263} [2023-08-30 20:56:23,399 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 133 predicate places. [2023-08-30 20:56:23,400 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 263 transitions, 3576 flow [2023-08-30 20:56:23,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:23,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:56:23,400 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] [2023-08-30 20:56:23,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 20:56:23,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 20:56:23,606 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)] === [2023-08-30 20:56:23,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:56:23,607 INFO L85 PathProgramCache]: Analyzing trace with hash -76548866, now seen corresponding path program 13 times [2023-08-30 20:56:23,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:56:23,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527954010] [2023-08-30 20:56:23,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:56:23,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:56:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:56:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:56:24,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:56:24,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527954010] [2023-08-30 20:56:24,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527954010] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:56:24,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980392398] [2023-08-30 20:56:24,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:56:24,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:56:24,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:56:24,889 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:56:24,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 20:56:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:56:24,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 20:56:24,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:56:25,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:56:25,229 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 [2023-08-30 20:56:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:56:25,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:56:25,674 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:56:25,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 114 [2023-08-30 20:56:25,696 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:56:25,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 56 [2023-08-30 20:56:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:56:26,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980392398] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:56:26,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:56:26,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2023-08-30 20:56:26,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584349830] [2023-08-30 20:56:26,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:56:26,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 20:56:26,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:56:26,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 20:56:26,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=932, Unknown=1, NotChecked=0, Total=1056 [2023-08-30 20:56:28,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 279 [2023-08-30 20:56:28,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 263 transitions, 3576 flow. Second operand has 33 states, 33 states have (on average 85.9090909090909) internal successors, (2835), 33 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:28,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:56:28,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 279 [2023-08-30 20:56:28,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:56:42,660 WARN L222 SmtUtils]: Spent 8.34s on a formula simplification. DAG size of input: 90 DAG size of output: 88 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:56:50,950 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] [2023-08-30 20:56:53,392 INFO L130 PetriNetUnfolder]: 1513/2940 cut-off events. [2023-08-30 20:56:53,392 INFO L131 PetriNetUnfolder]: For 42817/42817 co-relation queries the response was YES. [2023-08-30 20:56:53,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20613 conditions, 2940 events. 1513/2940 cut-off events. For 42817/42817 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 19649 event pairs, 308 based on Foata normal form. 3/2938 useless extension candidates. Maximal degree in co-relation 20466. Up to 895 conditions per place. [2023-08-30 20:56:53,410 INFO L137 encePairwiseOnDemand]: 265/279 looper letters, 321 selfloop transitions, 173 changer transitions 36/530 dead transitions. [2023-08-30 20:56:53,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 530 transitions, 7157 flow [2023-08-30 20:56:53,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 20:56:53,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 20:56:53,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3407 transitions. [2023-08-30 20:56:53,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33003971713649133 [2023-08-30 20:56:53,416 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3407 transitions. [2023-08-30 20:56:53,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3407 transitions. [2023-08-30 20:56:53,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:56:53,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3407 transitions. [2023-08-30 20:56:53,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 92.08108108108108) internal successors, (3407), 37 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:53,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 279.0) internal successors, (10602), 38 states have internal predecessors, (10602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:53,432 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 279.0) internal successors, (10602), 38 states have internal predecessors, (10602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:53,433 INFO L175 Difference]: Start difference. First operand has 162 places, 263 transitions, 3576 flow. Second operand 37 states and 3407 transitions. [2023-08-30 20:56:53,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 530 transitions, 7157 flow [2023-08-30 20:56:53,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 530 transitions, 6908 flow, removed 71 selfloop flow, removed 6 redundant places. [2023-08-30 20:56:53,569 INFO L231 Difference]: Finished difference. Result has 204 places, 317 transitions, 4744 flow [2023-08-30 20:56:53,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=3428, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4744, PETRI_PLACES=204, PETRI_TRANSITIONS=317} [2023-08-30 20:56:53,570 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 175 predicate places. [2023-08-30 20:56:53,570 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 317 transitions, 4744 flow [2023-08-30 20:56:53,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 85.9090909090909) internal successors, (2835), 33 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:53,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:56:53,571 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] [2023-08-30 20:56:53,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 20:56:53,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 20:56:53,771 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)] === [2023-08-30 20:56:53,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:56:53,772 INFO L85 PathProgramCache]: Analyzing trace with hash 892284170, now seen corresponding path program 14 times [2023-08-30 20:56:53,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:56:53,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792379454] [2023-08-30 20:56:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:56:53,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:56:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:56:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:56:54,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:56:54,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792379454] [2023-08-30 20:56:54,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792379454] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:56:54,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895377780] [2023-08-30 20:56:54,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:56:54,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:56:54,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:56:54,999 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:56:55,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 20:56:55,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 20:56:55,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:56:55,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 20:56:55,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:56:55,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:56:55,243 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 21 treesize of output 23 [2023-08-30 20:56:55,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:56:55,290 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 21 treesize of output 23 [2023-08-30 20:56:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:56:55,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 20:56:55,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895377780] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:56:55,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 20:56:55,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 19 [2023-08-30 20:56:55,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075860624] [2023-08-30 20:56:55,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:56:55,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 20:56:55,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:56:55,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 20:56:55,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2023-08-30 20:56:55,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 279 [2023-08-30 20:56:55,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 317 transitions, 4744 flow. Second operand has 11 states, 11 states have (on average 111.81818181818181) internal successors, (1230), 11 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:55,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:56:55,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 279 [2023-08-30 20:56:55,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:56:56,454 INFO L130 PetriNetUnfolder]: 1503/2891 cut-off events. [2023-08-30 20:56:56,454 INFO L131 PetriNetUnfolder]: For 47748/47748 co-relation queries the response was YES. [2023-08-30 20:56:56,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21420 conditions, 2891 events. 1503/2891 cut-off events. For 47748/47748 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 18903 event pairs, 295 based on Foata normal form. 14/2905 useless extension candidates. Maximal degree in co-relation 21235. Up to 1931 conditions per place. [2023-08-30 20:56:56,473 INFO L137 encePairwiseOnDemand]: 269/279 looper letters, 258 selfloop transitions, 89 changer transitions 14/361 dead transitions. [2023-08-30 20:56:56,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 361 transitions, 5942 flow [2023-08-30 20:56:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:56:56,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:56:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 957 transitions. [2023-08-30 20:56:56,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42876344086021506 [2023-08-30 20:56:56,475 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 957 transitions. [2023-08-30 20:56:56,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 957 transitions. [2023-08-30 20:56:56,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:56:56,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 957 transitions. [2023-08-30 20:56:56,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.625) internal successors, (957), 8 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:56,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:56,479 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:56,480 INFO L175 Difference]: Start difference. First operand has 204 places, 317 transitions, 4744 flow. Second operand 8 states and 957 transitions. [2023-08-30 20:56:56,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 361 transitions, 5942 flow [2023-08-30 20:56:56,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 361 transitions, 5773 flow, removed 77 selfloop flow, removed 9 redundant places. [2023-08-30 20:56:56,624 INFO L231 Difference]: Finished difference. Result has 203 places, 321 transitions, 4922 flow [2023-08-30 20:56:56,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=4577, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4922, PETRI_PLACES=203, PETRI_TRANSITIONS=321} [2023-08-30 20:56:56,625 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 174 predicate places. [2023-08-30 20:56:56,625 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 321 transitions, 4922 flow [2023-08-30 20:56:56,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 111.81818181818181) internal successors, (1230), 11 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:56,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:56:56,626 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] [2023-08-30 20:56:56,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 20:56:56,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:56:56,826 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)] === [2023-08-30 20:56:56,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:56:56,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1172192138, now seen corresponding path program 15 times [2023-08-30 20:56:56,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:56:56,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164282782] [2023-08-30 20:56:56,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:56:56,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:56:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:56:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:56:58,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:56:58,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164282782] [2023-08-30 20:56:58,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164282782] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:56:58,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65807527] [2023-08-30 20:56:58,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:56:58,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:56:58,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:56:58,286 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:56:58,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 20:56:58,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 20:56:58,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:56:58,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 20:56:58,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:56:58,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:56:58,530 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 21 treesize of output 23 [2023-08-30 20:56:58,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:56:58,635 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 34 treesize of output 34 [2023-08-30 20:56:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:56:58,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 20:56:58,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65807527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:56:58,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 20:56:58,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 20 [2023-08-30 20:56:58,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257356311] [2023-08-30 20:56:58,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:56:58,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 20:56:58,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:56:58,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 20:56:58,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2023-08-30 20:56:59,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 279 [2023-08-30 20:56:59,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 321 transitions, 4922 flow. Second operand has 11 states, 11 states have (on average 111.81818181818181) internal successors, (1230), 11 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:59,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:56:59,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 279 [2023-08-30 20:56:59,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:56:59,722 INFO L130 PetriNetUnfolder]: 1497/2884 cut-off events. [2023-08-30 20:56:59,722 INFO L131 PetriNetUnfolder]: For 51098/51098 co-relation queries the response was YES. [2023-08-30 20:56:59,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22117 conditions, 2884 events. 1497/2884 cut-off events. For 51098/51098 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18885 event pairs, 290 based on Foata normal form. 2/2885 useless extension candidates. Maximal degree in co-relation 21964. Up to 1909 conditions per place. [2023-08-30 20:56:59,748 INFO L137 encePairwiseOnDemand]: 270/279 looper letters, 257 selfloop transitions, 83 changer transitions 20/360 dead transitions. [2023-08-30 20:56:59,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 360 transitions, 6044 flow [2023-08-30 20:56:59,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:56:59,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:56:59,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 955 transitions. [2023-08-30 20:56:59,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42786738351254483 [2023-08-30 20:56:59,750 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 955 transitions. [2023-08-30 20:56:59,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 955 transitions. [2023-08-30 20:56:59,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:56:59,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 955 transitions. [2023-08-30 20:56:59,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.375) internal successors, (955), 8 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:59,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:59,754 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:59,754 INFO L175 Difference]: Start difference. First operand has 203 places, 321 transitions, 4922 flow. Second operand 8 states and 955 transitions. [2023-08-30 20:56:59,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 360 transitions, 6044 flow [2023-08-30 20:56:59,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 360 transitions, 5894 flow, removed 24 selfloop flow, removed 4 redundant places. [2023-08-30 20:56:59,937 INFO L231 Difference]: Finished difference. Result has 207 places, 314 transitions, 4850 flow [2023-08-30 20:56:59,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=4772, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4850, PETRI_PLACES=207, PETRI_TRANSITIONS=314} [2023-08-30 20:56:59,937 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 178 predicate places. [2023-08-30 20:56:59,937 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 314 transitions, 4850 flow [2023-08-30 20:56:59,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 111.81818181818181) internal successors, (1230), 11 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:56:59,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:56:59,938 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] [2023-08-30 20:56:59,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 20:57:00,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 20:57:00,138 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)] === [2023-08-30 20:57:00,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:00,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1038907006, now seen corresponding path program 1 times [2023-08-30 20:57:00,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:00,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737043125] [2023-08-30 20:57:00,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:00,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:57:00,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:00,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737043125] [2023-08-30 20:57:00,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737043125] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:57:00,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:57:00,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:57:00,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017934650] [2023-08-30 20:57:00,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:57:00,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:57:00,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:00,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:57:00,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:57:00,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 279 [2023-08-30 20:57:00,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 314 transitions, 4850 flow. Second operand has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:00,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:00,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 279 [2023-08-30 20:57:00,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:00,895 INFO L130 PetriNetUnfolder]: 1534/2891 cut-off events. [2023-08-30 20:57:00,895 INFO L131 PetriNetUnfolder]: For 58182/58182 co-relation queries the response was YES. [2023-08-30 20:57:00,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23110 conditions, 2891 events. 1534/2891 cut-off events. For 58182/58182 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 18418 event pairs, 205 based on Foata normal form. 113/3003 useless extension candidates. Maximal degree in co-relation 22963. Up to 1475 conditions per place. [2023-08-30 20:57:00,916 INFO L137 encePairwiseOnDemand]: 273/279 looper letters, 287 selfloop transitions, 99 changer transitions 0/386 dead transitions. [2023-08-30 20:57:00,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 386 transitions, 6556 flow [2023-08-30 20:57:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 20:57:00,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 20:57:00,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 816 transitions. [2023-08-30 20:57:00,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4874551971326165 [2023-08-30 20:57:00,918 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 816 transitions. [2023-08-30 20:57:00,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 816 transitions. [2023-08-30 20:57:00,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:00,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 816 transitions. [2023-08-30 20:57:00,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:00,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 279.0) internal successors, (1953), 7 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:00,920 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 279.0) internal successors, (1953), 7 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:00,920 INFO L175 Difference]: Start difference. First operand has 207 places, 314 transitions, 4850 flow. Second operand 6 states and 816 transitions. [2023-08-30 20:57:00,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 386 transitions, 6556 flow [2023-08-30 20:57:01,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 386 transitions, 6223 flow, removed 59 selfloop flow, removed 11 redundant places. [2023-08-30 20:57:01,080 INFO L231 Difference]: Finished difference. Result has 199 places, 324 transitions, 5121 flow [2023-08-30 20:57:01,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=4380, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5121, PETRI_PLACES=199, PETRI_TRANSITIONS=324} [2023-08-30 20:57:01,081 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 170 predicate places. [2023-08-30 20:57:01,081 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 324 transitions, 5121 flow [2023-08-30 20:57:01,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:01,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:01,081 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] [2023-08-30 20:57:01,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 20:57:01,081 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)] === [2023-08-30 20:57:01,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:01,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1291287646, now seen corresponding path program 1 times [2023-08-30 20:57:01,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:01,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691685849] [2023-08-30 20:57:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:01,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:57:01,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:01,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691685849] [2023-08-30 20:57:01,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691685849] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:57:01,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:57:01,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:57:01,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362241955] [2023-08-30 20:57:01,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:57:01,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:57:01,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:01,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:57:01,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:57:01,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 279 [2023-08-30 20:57:01,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 324 transitions, 5121 flow. Second operand has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:01,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:01,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 279 [2023-08-30 20:57:01,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:01,641 INFO L130 PetriNetUnfolder]: 1219/2364 cut-off events. [2023-08-30 20:57:01,641 INFO L131 PetriNetUnfolder]: For 51889/51889 co-relation queries the response was YES. [2023-08-30 20:57:01,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19163 conditions, 2364 events. 1219/2364 cut-off events. For 51889/51889 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14766 event pairs, 366 based on Foata normal form. 117/2480 useless extension candidates. Maximal degree in co-relation 19011. Up to 1760 conditions per place. [2023-08-30 20:57:01,658 INFO L137 encePairwiseOnDemand]: 274/279 looper letters, 223 selfloop transitions, 61 changer transitions 35/319 dead transitions. [2023-08-30 20:57:01,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 319 transitions, 5406 flow [2023-08-30 20:57:01,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:57:01,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:57:01,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 674 transitions. [2023-08-30 20:57:01,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4831541218637993 [2023-08-30 20:57:01,659 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 674 transitions. [2023-08-30 20:57:01,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 674 transitions. [2023-08-30 20:57:01,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:01,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 674 transitions. [2023-08-30 20:57:01,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.8) internal successors, (674), 5 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:01,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:01,662 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:01,662 INFO L175 Difference]: Start difference. First operand has 199 places, 324 transitions, 5121 flow. Second operand 5 states and 674 transitions. [2023-08-30 20:57:01,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 319 transitions, 5406 flow [2023-08-30 20:57:01,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 319 transitions, 5252 flow, removed 40 selfloop flow, removed 2 redundant places. [2023-08-30 20:57:01,810 INFO L231 Difference]: Finished difference. Result has 196 places, 262 transitions, 4021 flow [2023-08-30 20:57:01,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=4269, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4021, PETRI_PLACES=196, PETRI_TRANSITIONS=262} [2023-08-30 20:57:01,811 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 167 predicate places. [2023-08-30 20:57:01,811 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 262 transitions, 4021 flow [2023-08-30 20:57:01,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:01,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:01,812 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] [2023-08-30 20:57:01,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 20:57:01,812 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:57:01,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:01,813 INFO L85 PathProgramCache]: Analyzing trace with hash 733401850, now seen corresponding path program 2 times [2023-08-30 20:57:01,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:01,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53674925] [2023-08-30 20:57:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:01,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:57:01,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:01,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53674925] [2023-08-30 20:57:01,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53674925] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:57:01,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:57:01,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:57:01,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542214712] [2023-08-30 20:57:01,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:57:01,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:57:01,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:01,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:57:01,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:57:01,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 279 [2023-08-30 20:57:01,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 262 transitions, 4021 flow. Second operand has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:01,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:01,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 279 [2023-08-30 20:57:01,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:02,307 INFO L130 PetriNetUnfolder]: 1260/2360 cut-off events. [2023-08-30 20:57:02,307 INFO L131 PetriNetUnfolder]: For 53837/53837 co-relation queries the response was YES. [2023-08-30 20:57:02,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19318 conditions, 2360 events. 1260/2360 cut-off events. For 53837/53837 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14102 event pairs, 376 based on Foata normal form. 61/2420 useless extension candidates. Maximal degree in co-relation 19248. Up to 1678 conditions per place. [2023-08-30 20:57:02,325 INFO L137 encePairwiseOnDemand]: 274/279 looper letters, 253 selfloop transitions, 67 changer transitions 1/321 dead transitions. [2023-08-30 20:57:02,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 321 transitions, 5292 flow [2023-08-30 20:57:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:57:02,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:57:02,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 687 transitions. [2023-08-30 20:57:02,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4924731182795699 [2023-08-30 20:57:02,326 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 687 transitions. [2023-08-30 20:57:02,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 687 transitions. [2023-08-30 20:57:02,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:02,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 687 transitions. [2023-08-30 20:57:02,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.4) internal successors, (687), 5 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:02,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:02,328 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:02,328 INFO L175 Difference]: Start difference. First operand has 196 places, 262 transitions, 4021 flow. Second operand 5 states and 687 transitions. [2023-08-30 20:57:02,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 321 transitions, 5292 flow [2023-08-30 20:57:02,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 321 transitions, 5047 flow, removed 45 selfloop flow, removed 12 redundant places. [2023-08-30 20:57:02,452 INFO L231 Difference]: Finished difference. Result has 180 places, 269 transitions, 4079 flow [2023-08-30 20:57:02,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=3808, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4079, PETRI_PLACES=180, PETRI_TRANSITIONS=269} [2023-08-30 20:57:02,453 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 151 predicate places. [2023-08-30 20:57:02,453 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 269 transitions, 4079 flow [2023-08-30 20:57:02,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:02,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:02,453 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] [2023-08-30 20:57:02,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 20:57:02,453 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:57:02,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:02,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1684218422, now seen corresponding path program 3 times [2023-08-30 20:57:02,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:02,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787179861] [2023-08-30 20:57:02,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:02,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:02,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:57:02,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:02,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787179861] [2023-08-30 20:57:02,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787179861] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:57:02,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:57:02,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:57:02,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110995635] [2023-08-30 20:57:02,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:57:02,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:57:02,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:02,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:57:02,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:57:02,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 279 [2023-08-30 20:57:02,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 269 transitions, 4079 flow. Second operand has 5 states, 5 states have (on average 127.2) internal successors, (636), 5 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:02,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:02,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 279 [2023-08-30 20:57:02,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:02,990 INFO L130 PetriNetUnfolder]: 1181/2209 cut-off events. [2023-08-30 20:57:02,990 INFO L131 PetriNetUnfolder]: For 45813/45813 co-relation queries the response was YES. [2023-08-30 20:57:02,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17555 conditions, 2209 events. 1181/2209 cut-off events. For 45813/45813 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12978 event pairs, 378 based on Foata normal form. 24/2232 useless extension candidates. Maximal degree in co-relation 17492. Up to 1778 conditions per place. [2023-08-30 20:57:03,005 INFO L137 encePairwiseOnDemand]: 273/279 looper letters, 220 selfloop transitions, 62 changer transitions 9/291 dead transitions. [2023-08-30 20:57:03,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 291 transitions, 4717 flow [2023-08-30 20:57:03,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 20:57:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 20:57:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 801 transitions. [2023-08-30 20:57:03,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478494623655914 [2023-08-30 20:57:03,007 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 801 transitions. [2023-08-30 20:57:03,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 801 transitions. [2023-08-30 20:57:03,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:03,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 801 transitions. [2023-08-30 20:57:03,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.5) internal successors, (801), 6 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:03,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 279.0) internal successors, (1953), 7 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:03,009 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 279.0) internal successors, (1953), 7 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:03,009 INFO L175 Difference]: Start difference. First operand has 180 places, 269 transitions, 4079 flow. Second operand 6 states and 801 transitions. [2023-08-30 20:57:03,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 291 transitions, 4717 flow [2023-08-30 20:57:03,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 291 transitions, 4551 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-08-30 20:57:03,115 INFO L231 Difference]: Finished difference. Result has 179 places, 250 transitions, 3711 flow [2023-08-30 20:57:03,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=3670, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3711, PETRI_PLACES=179, PETRI_TRANSITIONS=250} [2023-08-30 20:57:03,115 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 150 predicate places. [2023-08-30 20:57:03,116 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 250 transitions, 3711 flow [2023-08-30 20:57:03,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.2) internal successors, (636), 5 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:03,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:03,116 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] [2023-08-30 20:57:03,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 20:57:03,116 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:57:03,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:03,116 INFO L85 PathProgramCache]: Analyzing trace with hash 486770582, now seen corresponding path program 4 times [2023-08-30 20:57:03,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:03,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547600500] [2023-08-30 20:57:03,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:03,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:57:03,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:03,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547600500] [2023-08-30 20:57:03,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547600500] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:57:03,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:57:03,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:57:03,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642239717] [2023-08-30 20:57:03,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:57:03,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:57:03,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:03,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:57:03,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:57:03,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 279 [2023-08-30 20:57:03,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 250 transitions, 3711 flow. Second operand has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:03,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:03,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 279 [2023-08-30 20:57:03,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:03,630 INFO L130 PetriNetUnfolder]: 1245/2301 cut-off events. [2023-08-30 20:57:03,630 INFO L131 PetriNetUnfolder]: For 49045/49045 co-relation queries the response was YES. [2023-08-30 20:57:03,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18166 conditions, 2301 events. 1245/2301 cut-off events. For 49045/49045 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13446 event pairs, 294 based on Foata normal form. 61/2361 useless extension candidates. Maximal degree in co-relation 18103. Up to 1303 conditions per place. [2023-08-30 20:57:03,645 INFO L137 encePairwiseOnDemand]: 274/279 looper letters, 204 selfloop transitions, 90 changer transitions 0/294 dead transitions. [2023-08-30 20:57:03,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 294 transitions, 4735 flow [2023-08-30 20:57:03,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:57:03,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:57:03,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 685 transitions. [2023-08-30 20:57:03,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4910394265232975 [2023-08-30 20:57:03,647 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 685 transitions. [2023-08-30 20:57:03,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 685 transitions. [2023-08-30 20:57:03,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:03,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 685 transitions. [2023-08-30 20:57:03,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:03,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:03,649 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:03,649 INFO L175 Difference]: Start difference. First operand has 179 places, 250 transitions, 3711 flow. Second operand 5 states and 685 transitions. [2023-08-30 20:57:03,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 294 transitions, 4735 flow [2023-08-30 20:57:03,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 294 transitions, 4542 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-08-30 20:57:03,747 INFO L231 Difference]: Finished difference. Result has 179 places, 251 transitions, 3806 flow [2023-08-30 20:57:03,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=3356, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3806, PETRI_PLACES=179, PETRI_TRANSITIONS=251} [2023-08-30 20:57:03,748 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 150 predicate places. [2023-08-30 20:57:03,748 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 251 transitions, 3806 flow [2023-08-30 20:57:03,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:03,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:03,748 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] [2023-08-30 20:57:03,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 20:57:03,748 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:57:03,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:03,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1354929972, now seen corresponding path program 5 times [2023-08-30 20:57:03,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:03,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861408416] [2023-08-30 20:57:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:03,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:57:03,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:03,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861408416] [2023-08-30 20:57:03,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861408416] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:57:03,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:57:03,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:57:03,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301828300] [2023-08-30 20:57:03,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:57:03,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:57:03,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:03,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:57:03,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:57:03,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 279 [2023-08-30 20:57:03,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 251 transitions, 3806 flow. Second operand has 5 states, 5 states have (on average 127.2) internal successors, (636), 5 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:03,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:03,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 279 [2023-08-30 20:57:03,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:04,265 INFO L130 PetriNetUnfolder]: 1206/2255 cut-off events. [2023-08-30 20:57:04,265 INFO L131 PetriNetUnfolder]: For 51787/51787 co-relation queries the response was YES. [2023-08-30 20:57:04,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18498 conditions, 2255 events. 1206/2255 cut-off events. For 51787/51787 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13311 event pairs, 292 based on Foata normal form. 27/2281 useless extension candidates. Maximal degree in co-relation 18433. Up to 1303 conditions per place. [2023-08-30 20:57:04,279 INFO L137 encePairwiseOnDemand]: 273/279 looper letters, 183 selfloop transitions, 81 changer transitions 4/268 dead transitions. [2023-08-30 20:57:04,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 268 transitions, 4373 flow [2023-08-30 20:57:04,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:57:04,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:57:04,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 672 transitions. [2023-08-30 20:57:04,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817204301075269 [2023-08-30 20:57:04,281 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 672 transitions. [2023-08-30 20:57:04,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 672 transitions. [2023-08-30 20:57:04,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:04,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 672 transitions. [2023-08-30 20:57:04,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.4) internal successors, (672), 5 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:04,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:04,283 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:04,283 INFO L175 Difference]: Start difference. First operand has 179 places, 251 transitions, 3806 flow. Second operand 5 states and 672 transitions. [2023-08-30 20:57:04,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 268 transitions, 4373 flow [2023-08-30 20:57:04,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 268 transitions, 4213 flow, removed 35 selfloop flow, removed 4 redundant places. [2023-08-30 20:57:04,387 INFO L231 Difference]: Finished difference. Result has 179 places, 237 transitions, 3535 flow [2023-08-30 20:57:04,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=3417, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3535, PETRI_PLACES=179, PETRI_TRANSITIONS=237} [2023-08-30 20:57:04,388 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 150 predicate places. [2023-08-30 20:57:04,388 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 237 transitions, 3535 flow [2023-08-30 20:57:04,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.2) internal successors, (636), 5 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:04,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:04,388 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] [2023-08-30 20:57:04,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 20:57:04,388 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:57:04,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:04,388 INFO L85 PathProgramCache]: Analyzing trace with hash -965886622, now seen corresponding path program 6 times [2023-08-30 20:57:04,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:04,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026502905] [2023-08-30 20:57:04,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:04,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:04,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:57:04,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:04,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026502905] [2023-08-30 20:57:04,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026502905] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:57:04,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:57:04,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:57:04,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461793698] [2023-08-30 20:57:04,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:57:04,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:57:04,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:04,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:57:04,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:57:04,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 279 [2023-08-30 20:57:04,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 237 transitions, 3535 flow. Second operand has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:04,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:04,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 279 [2023-08-30 20:57:04,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:04,805 INFO L130 PetriNetUnfolder]: 1132/2104 cut-off events. [2023-08-30 20:57:04,805 INFO L131 PetriNetUnfolder]: For 43506/43506 co-relation queries the response was YES. [2023-08-30 20:57:04,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16715 conditions, 2104 events. 1132/2104 cut-off events. For 43506/43506 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12132 event pairs, 270 based on Foata normal form. 30/2133 useless extension candidates. Maximal degree in co-relation 16652. Up to 1303 conditions per place. [2023-08-30 20:57:04,819 INFO L137 encePairwiseOnDemand]: 274/279 looper letters, 159 selfloop transitions, 65 changer transitions 17/241 dead transitions. [2023-08-30 20:57:04,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 241 transitions, 3901 flow [2023-08-30 20:57:04,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:57:04,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:57:04,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 669 transitions. [2023-08-30 20:57:04,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47956989247311826 [2023-08-30 20:57:04,820 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 669 transitions. [2023-08-30 20:57:04,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 669 transitions. [2023-08-30 20:57:04,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:04,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 669 transitions. [2023-08-30 20:57:04,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.8) internal successors, (669), 5 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:04,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:04,822 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:04,822 INFO L175 Difference]: Start difference. First operand has 179 places, 237 transitions, 3535 flow. Second operand 5 states and 669 transitions. [2023-08-30 20:57:04,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 241 transitions, 3901 flow [2023-08-30 20:57:04,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 241 transitions, 3661 flow, removed 11 selfloop flow, removed 10 redundant places. [2023-08-30 20:57:04,904 INFO L231 Difference]: Finished difference. Result has 172 places, 206 transitions, 2863 flow [2023-08-30 20:57:04,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=2988, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2863, PETRI_PLACES=172, PETRI_TRANSITIONS=206} [2023-08-30 20:57:04,904 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 143 predicate places. [2023-08-30 20:57:04,904 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 206 transitions, 2863 flow [2023-08-30 20:57:04,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:04,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:04,905 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:57:04,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 20:57:04,905 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:57:04,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:04,905 INFO L85 PathProgramCache]: Analyzing trace with hash 157372981, now seen corresponding path program 16 times [2023-08-30 20:57:04,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:04,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206064733] [2023-08-30 20:57:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:04,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:07,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:07,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206064733] [2023-08-30 20:57:07,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206064733] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:57:07,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595797778] [2023-08-30 20:57:07,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:57:07,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:07,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:57:07,820 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:57:07,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 20:57:07,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:57:07,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:57:07,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 20:57:07,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:57:08,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:57:08,163 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 35 treesize of output 35 [2023-08-30 20:57:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:57:08,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:57:08,450 INFO L321 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2023-08-30 20:57:08,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 57 [2023-08-30 20:57:08,456 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:57:08,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2023-08-30 20:57:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 20:57:08,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595797778] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:57:08,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:57:08,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 9] total 29 [2023-08-30 20:57:08,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807668066] [2023-08-30 20:57:08,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:57:08,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 20:57:08,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:08,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 20:57:08,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=805, Unknown=1, NotChecked=0, Total=930 [2023-08-30 20:57:08,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 279 [2023-08-30 20:57:08,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 206 transitions, 2863 flow. Second operand has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:08,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:08,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 279 [2023-08-30 20:57:08,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:10,122 INFO L130 PetriNetUnfolder]: 1159/2117 cut-off events. [2023-08-30 20:57:10,122 INFO L131 PetriNetUnfolder]: For 42340/42340 co-relation queries the response was YES. [2023-08-30 20:57:10,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16438 conditions, 2117 events. 1159/2117 cut-off events. For 42340/42340 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12043 event pairs, 146 based on Foata normal form. 1/2117 useless extension candidates. Maximal degree in co-relation 16379. Up to 837 conditions per place. [2023-08-30 20:57:10,137 INFO L137 encePairwiseOnDemand]: 268/279 looper letters, 165 selfloop transitions, 94 changer transitions 25/284 dead transitions. [2023-08-30 20:57:10,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 284 transitions, 4060 flow [2023-08-30 20:57:10,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:57:10,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:57:10,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1438 transitions. [2023-08-30 20:57:10,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964709125999449 [2023-08-30 20:57:10,140 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1438 transitions. [2023-08-30 20:57:10,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1438 transitions. [2023-08-30 20:57:10,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:10,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1438 transitions. [2023-08-30 20:57:10,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 110.61538461538461) internal successors, (1438), 13 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:10,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 279.0) internal successors, (3906), 14 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:10,145 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 279.0) internal successors, (3906), 14 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:10,145 INFO L175 Difference]: Start difference. First operand has 172 places, 206 transitions, 2863 flow. Second operand 13 states and 1438 transitions. [2023-08-30 20:57:10,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 284 transitions, 4060 flow [2023-08-30 20:57:10,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 284 transitions, 3808 flow, removed 18 selfloop flow, removed 6 redundant places. [2023-08-30 20:57:10,220 INFO L231 Difference]: Finished difference. Result has 177 places, 209 transitions, 2959 flow [2023-08-30 20:57:10,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=2641, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2959, PETRI_PLACES=177, PETRI_TRANSITIONS=209} [2023-08-30 20:57:10,220 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 148 predicate places. [2023-08-30 20:57:10,220 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 209 transitions, 2959 flow [2023-08-30 20:57:10,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:10,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:10,221 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:57:10,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 20:57:10,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-30 20:57:10,421 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:57:10,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:10,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2111557311, now seen corresponding path program 17 times [2023-08-30 20:57:10,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:10,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217105106] [2023-08-30 20:57:10,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:10,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:12,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:12,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217105106] [2023-08-30 20:57:12,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217105106] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:57:12,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099406374] [2023-08-30 20:57:12,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:57:12,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:12,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:57:12,330 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:57:12,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 20:57:12,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:57:12,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:57:12,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 20:57:12,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:57:12,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:57:12,624 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 34 treesize of output 34 [2023-08-30 20:57:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 20:57:12,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 20:57:12,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099406374] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:57:12,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 20:57:12,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-30 20:57:12,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73196587] [2023-08-30 20:57:12,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:57:12,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 20:57:12,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:12,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 20:57:12,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2023-08-30 20:57:12,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 279 [2023-08-30 20:57:12,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 209 transitions, 2959 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:12,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:12,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 279 [2023-08-30 20:57:12,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:13,440 INFO L130 PetriNetUnfolder]: 1144/2077 cut-off events. [2023-08-30 20:57:13,440 INFO L131 PetriNetUnfolder]: For 43376/43376 co-relation queries the response was YES. [2023-08-30 20:57:13,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16278 conditions, 2077 events. 1144/2077 cut-off events. For 43376/43376 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11501 event pairs, 269 based on Foata normal form. 1/2077 useless extension candidates. Maximal degree in co-relation 16217. Up to 1517 conditions per place. [2023-08-30 20:57:13,453 INFO L137 encePairwiseOnDemand]: 270/279 looper letters, 162 selfloop transitions, 55 changer transitions 21/238 dead transitions. [2023-08-30 20:57:13,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 238 transitions, 3661 flow [2023-08-30 20:57:13,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:57:13,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:57:13,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 965 transitions. [2023-08-30 20:57:13,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43234767025089604 [2023-08-30 20:57:13,454 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 965 transitions. [2023-08-30 20:57:13,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 965 transitions. [2023-08-30 20:57:13,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:13,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 965 transitions. [2023-08-30 20:57:13,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.625) internal successors, (965), 8 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:13,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:13,457 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:13,457 INFO L175 Difference]: Start difference. First operand has 177 places, 209 transitions, 2959 flow. Second operand 8 states and 965 transitions. [2023-08-30 20:57:13,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 238 transitions, 3661 flow [2023-08-30 20:57:13,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 238 transitions, 3510 flow, removed 34 selfloop flow, removed 6 redundant places. [2023-08-30 20:57:13,530 INFO L231 Difference]: Finished difference. Result has 174 places, 201 transitions, 2811 flow [2023-08-30 20:57:13,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=2822, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2811, PETRI_PLACES=174, PETRI_TRANSITIONS=201} [2023-08-30 20:57:13,530 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 145 predicate places. [2023-08-30 20:57:13,531 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 201 transitions, 2811 flow [2023-08-30 20:57:13,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:13,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:13,531 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:57:13,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 20:57:13,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:13,732 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:57:13,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:13,732 INFO L85 PathProgramCache]: Analyzing trace with hash 506824799, now seen corresponding path program 18 times [2023-08-30 20:57:13,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:13,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209607814] [2023-08-30 20:57:13,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:13,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:16,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:16,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209607814] [2023-08-30 20:57:16,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209607814] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:57:16,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416359739] [2023-08-30 20:57:16,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:57:16,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:16,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:57:16,784 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:57:16,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 20:57:16,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-30 20:57:16,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:57:16,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 20:57:16,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:57:17,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:57:17,125 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 34 treesize of output 34 [2023-08-30 20:57:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 20:57:17,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 20:57:17,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416359739] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:57:17,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 20:57:17,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-30 20:57:17,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780244754] [2023-08-30 20:57:17,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:57:17,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 20:57:17,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:17,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 20:57:17,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2023-08-30 20:57:17,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 279 [2023-08-30 20:57:17,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 201 transitions, 2811 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:17,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:17,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 279 [2023-08-30 20:57:17,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:18,033 INFO L130 PetriNetUnfolder]: 1131/2022 cut-off events. [2023-08-30 20:57:18,033 INFO L131 PetriNetUnfolder]: For 40101/40101 co-relation queries the response was YES. [2023-08-30 20:57:18,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15628 conditions, 2022 events. 1131/2022 cut-off events. For 40101/40101 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10893 event pairs, 264 based on Foata normal form. 1/2022 useless extension candidates. Maximal degree in co-relation 15566. Up to 1469 conditions per place. [2023-08-30 20:57:18,047 INFO L137 encePairwiseOnDemand]: 270/279 looper letters, 155 selfloop transitions, 49 changer transitions 26/230 dead transitions. [2023-08-30 20:57:18,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 230 transitions, 3485 flow [2023-08-30 20:57:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:57:18,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:57:18,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 963 transitions. [2023-08-30 20:57:18,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2023-08-30 20:57:18,049 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 963 transitions. [2023-08-30 20:57:18,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 963 transitions. [2023-08-30 20:57:18,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:18,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 963 transitions. [2023-08-30 20:57:18,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.375) internal successors, (963), 8 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:18,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:18,053 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:18,053 INFO L175 Difference]: Start difference. First operand has 174 places, 201 transitions, 2811 flow. Second operand 8 states and 963 transitions. [2023-08-30 20:57:18,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 230 transitions, 3485 flow [2023-08-30 20:57:18,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 230 transitions, 3341 flow, removed 17 selfloop flow, removed 8 redundant places. [2023-08-30 20:57:18,147 INFO L231 Difference]: Finished difference. Result has 169 places, 192 transitions, 2644 flow [2023-08-30 20:57:18,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=2677, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2644, PETRI_PLACES=169, PETRI_TRANSITIONS=192} [2023-08-30 20:57:18,147 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 140 predicate places. [2023-08-30 20:57:18,148 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 192 transitions, 2644 flow [2023-08-30 20:57:18,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:18,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:18,148 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] [2023-08-30 20:57:18,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 20:57:18,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:18,355 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:57:18,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:18,355 INFO L85 PathProgramCache]: Analyzing trace with hash -518517832, now seen corresponding path program 1 times [2023-08-30 20:57:18,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:18,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151678363] [2023-08-30 20:57:18,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:18,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:19,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:19,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151678363] [2023-08-30 20:57:19,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151678363] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:57:19,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828549820] [2023-08-30 20:57:19,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:19,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:19,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:57:19,489 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:57:19,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 20:57:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:19,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 20:57:19,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:57:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:20,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:57:20,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:57:20,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-08-30 20:57:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:21,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828549820] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:57:21,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:57:21,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2023-08-30 20:57:21,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10763520] [2023-08-30 20:57:21,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:57:21,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 20:57:21,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:21,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 20:57:21,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2023-08-30 20:57:23,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 279 [2023-08-30 20:57:23,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 192 transitions, 2644 flow. Second operand has 36 states, 36 states have (on average 107.91666666666667) internal successors, (3885), 36 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:23,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:23,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 279 [2023-08-30 20:57:23,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:38,461 WARN L222 SmtUtils]: Spent 12.47s on a formula simplification. DAG size of input: 102 DAG size of output: 65 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:57:55,952 WARN L222 SmtUtils]: Spent 9.38s on a formula simplification. DAG size of input: 99 DAG size of output: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:58:19,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 20:58:29,559 WARN L222 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 164 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:58:41,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 20:58:51,703 WARN L222 SmtUtils]: Spent 5.26s on a formula simplification. DAG size of input: 160 DAG size of output: 125 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:58:53,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:58:55,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:58:57,791 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 [] [2023-08-30 20:59:10,706 WARN L222 SmtUtils]: Spent 9.93s on a formula simplification. DAG size of input: 160 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:59:25,363 WARN L222 SmtUtils]: Spent 9.54s on a formula simplification. DAG size of input: 171 DAG size of output: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:59:25,959 INFO L130 PetriNetUnfolder]: 1830/3224 cut-off events. [2023-08-30 20:59:25,960 INFO L131 PetriNetUnfolder]: For 55904/55904 co-relation queries the response was YES. [2023-08-30 20:59:25,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24282 conditions, 3224 events. 1830/3224 cut-off events. For 55904/55904 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 19189 event pairs, 314 based on Foata normal form. 3/3226 useless extension candidates. Maximal degree in co-relation 24221. Up to 947 conditions per place. [2023-08-30 20:59:25,979 INFO L137 encePairwiseOnDemand]: 265/279 looper letters, 313 selfloop transitions, 232 changer transitions 34/579 dead transitions. [2023-08-30 20:59:25,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 579 transitions, 7914 flow [2023-08-30 20:59:25,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-30 20:59:25,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-30 20:59:25,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 5343 transitions. [2023-08-30 20:59:25,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40745824754060855 [2023-08-30 20:59:25,983 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 5343 transitions. [2023-08-30 20:59:25,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 5343 transitions. [2023-08-30 20:59:25,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:59:25,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 5343 transitions. [2023-08-30 20:59:25,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 113.68085106382979) internal successors, (5343), 47 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:25,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 279.0) internal successors, (13392), 48 states have internal predecessors, (13392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:25,999 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 279.0) internal successors, (13392), 48 states have internal predecessors, (13392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:25,999 INFO L175 Difference]: Start difference. First operand has 169 places, 192 transitions, 2644 flow. Second operand 47 states and 5343 transitions. [2023-08-30 20:59:25,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 579 transitions, 7914 flow [2023-08-30 20:59:26,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 579 transitions, 7402 flow, removed 164 selfloop flow, removed 9 redundant places. [2023-08-30 20:59:26,126 INFO L231 Difference]: Finished difference. Result has 221 places, 351 transitions, 5704 flow [2023-08-30 20:59:26,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=2477, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=5704, PETRI_PLACES=221, PETRI_TRANSITIONS=351} [2023-08-30 20:59:26,127 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 192 predicate places. [2023-08-30 20:59:26,127 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 351 transitions, 5704 flow [2023-08-30 20:59:26,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 107.91666666666667) internal successors, (3885), 36 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:26,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:26,127 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] [2023-08-30 20:59:26,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 20:59:26,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:59:26,328 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:59:26,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:26,328 INFO L85 PathProgramCache]: Analyzing trace with hash -683698794, now seen corresponding path program 2 times [2023-08-30 20:59:26,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:26,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968014227] [2023-08-30 20:59:26,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:26,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:27,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:27,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968014227] [2023-08-30 20:59:27,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968014227] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:59:27,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198546256] [2023-08-30 20:59:27,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:59:27,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:59:27,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:59:27,454 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:59:27,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 20:59:27,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:59:27,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:59:27,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-30 20:59:27,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:59:27,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 20:59:27,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:59:27,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:59:27,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:59:28,146 INFO L321 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2023-08-30 20:59:28,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 38 [2023-08-30 20:59:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:28,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:59:29,384 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:59:29,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 97 [2023-08-30 20:59:29,476 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 20:59:29,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 956 treesize of output 926 [2023-08-30 20:59:29,513 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:59:29,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:59:29,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 321 treesize of output 307 [2023-08-30 20:59:29,587 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:59:29,636 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:59:29,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 271 treesize of output 282 [2023-08-30 20:59:29,726 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 20:59:29,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 297 treesize of output 233 [2023-08-30 20:59:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:33,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198546256] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:59:33,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:59:33,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2023-08-30 20:59:33,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698670807] [2023-08-30 20:59:33,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:59:33,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-30 20:59:33,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:33,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-30 20:59:33,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1357, Unknown=5, NotChecked=0, Total=1560 [2023-08-30 20:59:35,340 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] [2023-08-30 20:59:37,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:59:40,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:59:42,386 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] [2023-08-30 20:59:42,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 279 [2023-08-30 20:59:42,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 351 transitions, 5704 flow. Second operand has 40 states, 40 states have (on average 83.725) internal successors, (3349), 40 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:42,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:59:42,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 279 [2023-08-30 20:59:42,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:59:50,517 INFO L130 PetriNetUnfolder]: 1879/3330 cut-off events. [2023-08-30 20:59:50,517 INFO L131 PetriNetUnfolder]: For 61762/61762 co-relation queries the response was YES. [2023-08-30 20:59:50,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26889 conditions, 3330 events. 1879/3330 cut-off events. For 61762/61762 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 20150 event pairs, 462 based on Foata normal form. 2/3331 useless extension candidates. Maximal degree in co-relation 26808. Up to 1639 conditions per place. [2023-08-30 20:59:50,543 INFO L137 encePairwiseOnDemand]: 268/279 looper letters, 368 selfloop transitions, 117 changer transitions 14/499 dead transitions. [2023-08-30 20:59:50,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 499 transitions, 7920 flow [2023-08-30 20:59:50,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 20:59:50,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 20:59:50,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2496 transitions. [2023-08-30 20:59:50,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3195084485407066 [2023-08-30 20:59:50,546 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2496 transitions. [2023-08-30 20:59:50,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2496 transitions. [2023-08-30 20:59:50,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:59:50,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2496 transitions. [2023-08-30 20:59:50,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 89.14285714285714) internal successors, (2496), 28 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:50,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 279.0) internal successors, (8091), 29 states have internal predecessors, (8091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:50,554 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 279.0) internal successors, (8091), 29 states have internal predecessors, (8091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:50,554 INFO L175 Difference]: Start difference. First operand has 221 places, 351 transitions, 5704 flow. Second operand 28 states and 2496 transitions. [2023-08-30 20:59:50,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 499 transitions, 7920 flow [2023-08-30 20:59:50,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 499 transitions, 7227 flow, removed 269 selfloop flow, removed 16 redundant places. [2023-08-30 20:59:50,776 INFO L231 Difference]: Finished difference. Result has 234 places, 369 transitions, 5672 flow [2023-08-30 20:59:50,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=5073, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5672, PETRI_PLACES=234, PETRI_TRANSITIONS=369} [2023-08-30 20:59:50,777 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 205 predicate places. [2023-08-30 20:59:50,777 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 369 transitions, 5672 flow [2023-08-30 20:59:50,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 83.725) internal successors, (3349), 40 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:50,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:50,778 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] [2023-08-30 20:59:50,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 20:59:50,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 20:59:50,982 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:59:50,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:50,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1658424482, now seen corresponding path program 3 times [2023-08-30 20:59:50,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:50,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121481483] [2023-08-30 20:59:50,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:50,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:51,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:51,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121481483] [2023-08-30 20:59:51,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121481483] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:59:51,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259031891] [2023-08-30 20:59:51,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:59:51,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:59:51,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:59:51,983 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:59:51,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 20:59:52,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:59:52,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:59:52,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-30 20:59:52,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:59:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:52,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:59:52,647 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-30 20:59:52,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 32 [2023-08-30 20:59:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:59:52,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259031891] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:59:52,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:59:52,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 31 [2023-08-30 20:59:52,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366832929] [2023-08-30 20:59:52,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:59:52,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 20:59:52,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:52,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 20:59:52,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2023-08-30 20:59:54,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 279 [2023-08-30 20:59:54,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 369 transitions, 5672 flow. Second operand has 32 states, 32 states have (on average 109.125) internal successors, (3492), 32 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:54,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:59:54,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 279 [2023-08-30 20:59:54,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:00:03,620 INFO L130 PetriNetUnfolder]: 1959/3503 cut-off events. [2023-08-30 21:00:03,620 INFO L131 PetriNetUnfolder]: For 55830/55830 co-relation queries the response was YES. [2023-08-30 21:00:03,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26860 conditions, 3503 events. 1959/3503 cut-off events. For 55830/55830 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 21909 event pairs, 178 based on Foata normal form. 3/3505 useless extension candidates. Maximal degree in co-relation 26779. Up to 792 conditions per place. [2023-08-30 21:00:03,648 INFO L137 encePairwiseOnDemand]: 265/279 looper letters, 306 selfloop transitions, 276 changer transitions 28/610 dead transitions. [2023-08-30 21:00:03,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 610 transitions, 9287 flow [2023-08-30 21:00:03,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-30 21:00:03,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-30 21:00:03,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4924 transitions. [2023-08-30 21:00:03,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41043594231891306 [2023-08-30 21:00:03,653 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4924 transitions. [2023-08-30 21:00:03,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4924 transitions. [2023-08-30 21:00:03,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:00:03,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4924 transitions. [2023-08-30 21:00:03,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 114.51162790697674) internal successors, (4924), 43 states have internal predecessors, (4924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:03,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 279.0) internal successors, (12276), 44 states have internal predecessors, (12276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:03,668 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 279.0) internal successors, (12276), 44 states have internal predecessors, (12276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:03,668 INFO L175 Difference]: Start difference. First operand has 234 places, 369 transitions, 5672 flow. Second operand 43 states and 4924 transitions. [2023-08-30 21:00:03,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 610 transitions, 9287 flow [2023-08-30 21:00:03,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 610 transitions, 9087 flow, removed 71 selfloop flow, removed 10 redundant places. [2023-08-30 21:00:03,957 INFO L231 Difference]: Finished difference. Result has 279 places, 416 transitions, 7171 flow [2023-08-30 21:00:03,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=5530, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=7171, PETRI_PLACES=279, PETRI_TRANSITIONS=416} [2023-08-30 21:00:03,958 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 250 predicate places. [2023-08-30 21:00:03,958 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 416 transitions, 7171 flow [2023-08-30 21:00:03,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 109.125) internal successors, (3492), 32 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:03,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:00:03,959 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] [2023-08-30 21:00:03,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 21:00:04,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 21:00:04,159 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:00:04,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:00:04,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1458131552, now seen corresponding path program 4 times [2023-08-30 21:00:04,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:00:04,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504704395] [2023-08-30 21:00:04,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:00:04,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:00:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:00:05,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:00:05,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:00:05,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504704395] [2023-08-30 21:00:05,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504704395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:00:05,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682160095] [2023-08-30 21:00:05,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:00:05,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:00:05,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:00:05,582 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:00:05,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 21:00:05,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:00:05,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:00:05,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 21:00:05,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:00:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:00:06,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:00:06,378 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:00:06,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 62 [2023-08-30 21:00:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:00:07,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682160095] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:00:07,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:00:07,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2023-08-30 21:00:07,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079378653] [2023-08-30 21:00:07,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:00:07,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 21:00:07,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:00:07,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 21:00:07,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1149, Unknown=0, NotChecked=0, Total=1332 [2023-08-30 21:00:10,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 279 [2023-08-30 21:00:10,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 416 transitions, 7171 flow. Second operand has 37 states, 37 states have (on average 100.86486486486487) internal successors, (3732), 37 states have internal predecessors, (3732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:10,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:00:10,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 279 [2023-08-30 21:00:10,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:00:17,400 INFO L130 PetriNetUnfolder]: 2086/3754 cut-off events. [2023-08-30 21:00:17,401 INFO L131 PetriNetUnfolder]: For 73272/73272 co-relation queries the response was YES. [2023-08-30 21:00:17,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31011 conditions, 3754 events. 2086/3754 cut-off events. For 73272/73272 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23947 event pairs, 311 based on Foata normal form. 3/3756 useless extension candidates. Maximal degree in co-relation 30918. Up to 1105 conditions per place. [2023-08-30 21:00:17,433 INFO L137 encePairwiseOnDemand]: 266/279 looper letters, 343 selfloop transitions, 227 changer transitions 25/595 dead transitions. [2023-08-30 21:00:17,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 595 transitions, 10119 flow [2023-08-30 21:00:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 21:00:17,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 21:00:17,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3104 transitions. [2023-08-30 21:00:17,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38363613891978743 [2023-08-30 21:00:17,436 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3104 transitions. [2023-08-30 21:00:17,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3104 transitions. [2023-08-30 21:00:17,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:00:17,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3104 transitions. [2023-08-30 21:00:17,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 107.03448275862068) internal successors, (3104), 29 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:17,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 279.0) internal successors, (8370), 30 states have internal predecessors, (8370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:17,448 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 279.0) internal successors, (8370), 30 states have internal predecessors, (8370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:17,448 INFO L175 Difference]: Start difference. First operand has 279 places, 416 transitions, 7171 flow. Second operand 29 states and 3104 transitions. [2023-08-30 21:00:17,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 595 transitions, 10119 flow [2023-08-30 21:00:17,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 595 transitions, 9692 flow, removed 145 selfloop flow, removed 24 redundant places. [2023-08-30 21:00:17,764 INFO L231 Difference]: Finished difference. Result has 289 places, 443 transitions, 7969 flow [2023-08-30 21:00:17,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=6816, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7969, PETRI_PLACES=289, PETRI_TRANSITIONS=443} [2023-08-30 21:00:17,765 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 260 predicate places. [2023-08-30 21:00:17,765 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 443 transitions, 7969 flow [2023-08-30 21:00:17,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 100.86486486486487) internal successors, (3732), 37 states have internal predecessors, (3732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:17,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:00:17,766 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] [2023-08-30 21:00:17,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 21:00:17,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:00:17,973 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:00:17,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:00:17,973 INFO L85 PathProgramCache]: Analyzing trace with hash -509029564, now seen corresponding path program 5 times [2023-08-30 21:00:17,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:00:17,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387546736] [2023-08-30 21:00:17,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:00:17,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:00:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:00:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:00:19,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:00:19,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387546736] [2023-08-30 21:00:19,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387546736] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:00:19,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413743080] [2023-08-30 21:00:19,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:00:19,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:00:19,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:00:19,365 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:00:19,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 21:00:19,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:00:19,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:00:19,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-30 21:00:19,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:00:19,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 21:00:19,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:00:19,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:00:19,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:00:19,861 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 20 treesize of output 22 [2023-08-30 21:00:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:00:20,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:00:21,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:00:21,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 95 [2023-08-30 21:00:21,160 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:00:21,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1240 treesize of output 1159 [2023-08-30 21:00:21,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:00:21,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 436 treesize of output 374 [2023-08-30 21:00:21,260 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:00:21,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 356 treesize of output 328 [2023-08-30 21:00:21,313 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:00:21,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 229 treesize of output 233 [2023-08-30 21:00:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:00:23,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413743080] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:00:23,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:00:23,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-30 21:00:23,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25588748] [2023-08-30 21:00:23,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:00:23,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 21:00:23,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:00:23,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 21:00:23,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1458, Unknown=17, NotChecked=0, Total=1640 [2023-08-30 21:00:24,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 279 [2023-08-30 21:00:24,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 443 transitions, 7969 flow. Second operand has 41 states, 41 states have (on average 83.6829268292683) internal successors, (3431), 41 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:24,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:00:24,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 279 [2023-08-30 21:00:24,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:00:32,315 WARN L222 SmtUtils]: Spent 8.14s on a formula simplification. DAG size of input: 83 DAG size of output: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:00:50,448 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] [2023-08-30 21:00:54,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:00:59,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:01:03,723 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] [2023-08-30 21:01:05,114 INFO L130 PetriNetUnfolder]: 2575/4560 cut-off events. [2023-08-30 21:01:05,115 INFO L131 PetriNetUnfolder]: For 102946/102946 co-relation queries the response was YES. [2023-08-30 21:01:05,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39239 conditions, 4560 events. 2575/4560 cut-off events. For 102946/102946 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 29606 event pairs, 417 based on Foata normal form. 7/4566 useless extension candidates. Maximal degree in co-relation 39142. Up to 1942 conditions per place. [2023-08-30 21:01:05,151 INFO L137 encePairwiseOnDemand]: 265/279 looper letters, 532 selfloop transitions, 329 changer transitions 49/910 dead transitions. [2023-08-30 21:01:05,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 910 transitions, 16408 flow [2023-08-30 21:01:05,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-30 21:01:05,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-30 21:01:05,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 5055 transitions. [2023-08-30 21:01:05,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3178645538577627 [2023-08-30 21:01:05,156 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 5055 transitions. [2023-08-30 21:01:05,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 5055 transitions. [2023-08-30 21:01:05,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:01:05,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 5055 transitions. [2023-08-30 21:01:05,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 88.6842105263158) internal successors, (5055), 57 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:05,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 279.0) internal successors, (16182), 58 states have internal predecessors, (16182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:05,173 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 279.0) internal successors, (16182), 58 states have internal predecessors, (16182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:05,174 INFO L175 Difference]: Start difference. First operand has 289 places, 443 transitions, 7969 flow. Second operand 57 states and 5055 transitions. [2023-08-30 21:01:05,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 910 transitions, 16408 flow [2023-08-30 21:01:05,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 910 transitions, 15826 flow, removed 133 selfloop flow, removed 13 redundant places. [2023-08-30 21:01:05,631 INFO L231 Difference]: Finished difference. Result has 355 places, 604 transitions, 12059 flow [2023-08-30 21:01:05,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=7598, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=12059, PETRI_PLACES=355, PETRI_TRANSITIONS=604} [2023-08-30 21:01:05,632 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 326 predicate places. [2023-08-30 21:01:05,632 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 604 transitions, 12059 flow [2023-08-30 21:01:05,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 83.6829268292683) internal successors, (3431), 41 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:05,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:01:05,633 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] [2023-08-30 21:01:05,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 21:01:05,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:05,842 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:01:05,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:01:05,843 INFO L85 PathProgramCache]: Analyzing trace with hash 405415062, now seen corresponding path program 6 times [2023-08-30 21:01:05,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:01:05,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276264977] [2023-08-30 21:01:05,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:01:05,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:01:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:01:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:07,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:01:07,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276264977] [2023-08-30 21:01:07,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276264977] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:01:07,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942598835] [2023-08-30 21:01:07,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:01:07,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:07,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:01:07,336 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:01:07,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 21:01:07,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:01:07,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:01:07,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 21:01:07,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:01:07,892 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:01:07,894 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:01:07,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 35 [2023-08-30 21:01:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:07,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:01:08,173 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:01:08,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 60 [2023-08-30 21:01:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:09,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942598835] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:01:09,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:01:09,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 34 [2023-08-30 21:01:09,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533183041] [2023-08-30 21:01:09,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:01:09,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 21:01:09,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:01:09,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 21:01:09,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2023-08-30 21:01:12,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 279 [2023-08-30 21:01:12,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 604 transitions, 12059 flow. Second operand has 36 states, 36 states have (on average 100.91666666666667) internal successors, (3633), 36 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:12,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:01:12,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 279 [2023-08-30 21:01:12,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:01:19,087 INFO L130 PetriNetUnfolder]: 2657/4663 cut-off events. [2023-08-30 21:01:19,087 INFO L131 PetriNetUnfolder]: For 98829/98829 co-relation queries the response was YES. [2023-08-30 21:01:19,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41117 conditions, 4663 events. 2657/4663 cut-off events. For 98829/98829 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 29849 event pairs, 654 based on Foata normal form. 12/4674 useless extension candidates. Maximal degree in co-relation 40996. Up to 2413 conditions per place. [2023-08-30 21:01:19,130 INFO L137 encePairwiseOnDemand]: 267/279 looper letters, 526 selfloop transitions, 144 changer transitions 77/747 dead transitions. [2023-08-30 21:01:19,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 747 transitions, 15071 flow [2023-08-30 21:01:19,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 21:01:19,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 21:01:19,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2963 transitions. [2023-08-30 21:01:19,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37928827444956476 [2023-08-30 21:01:19,133 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2963 transitions. [2023-08-30 21:01:19,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2963 transitions. [2023-08-30 21:01:19,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:01:19,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2963 transitions. [2023-08-30 21:01:19,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 105.82142857142857) internal successors, (2963), 28 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:19,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 279.0) internal successors, (8091), 29 states have internal predecessors, (8091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:19,139 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 279.0) internal successors, (8091), 29 states have internal predecessors, (8091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:19,139 INFO L175 Difference]: Start difference. First operand has 355 places, 604 transitions, 12059 flow. Second operand 28 states and 2963 transitions. [2023-08-30 21:01:19,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 747 transitions, 15071 flow [2023-08-30 21:01:19,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 747 transitions, 13771 flow, removed 497 selfloop flow, removed 28 redundant places. [2023-08-30 21:01:19,684 INFO L231 Difference]: Finished difference. Result has 353 places, 600 transitions, 11266 flow [2023-08-30 21:01:19,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=10963, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=11266, PETRI_PLACES=353, PETRI_TRANSITIONS=600} [2023-08-30 21:01:19,685 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 324 predicate places. [2023-08-30 21:01:19,685 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 600 transitions, 11266 flow [2023-08-30 21:01:19,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 100.91666666666667) internal successors, (3633), 36 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:19,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:01:19,686 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] [2023-08-30 21:01:19,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 21:01:19,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:19,893 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:01:19,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:01:19,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1021491738, now seen corresponding path program 7 times [2023-08-30 21:01:19,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:01:19,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288310507] [2023-08-30 21:01:19,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:01:19,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:01:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:01:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:21,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:01:21,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288310507] [2023-08-30 21:01:21,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288310507] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:01:21,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719276116] [2023-08-30 21:01:21,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:01:21,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:21,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:01:21,006 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:01:21,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 21:01:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:01:21,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 21:01:21,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:01:21,450 INFO L321 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2023-08-30 21:01:21,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 38 [2023-08-30 21:01:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:21,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:01:21,658 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:01:21,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 60 [2023-08-30 21:01:22,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:01:22,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719276116] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:01:22,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:01:22,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 33 [2023-08-30 21:01:22,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42478905] [2023-08-30 21:01:22,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:01:22,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 21:01:22,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:01:22,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 21:01:22,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2023-08-30 21:01:24,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 279 [2023-08-30 21:01:24,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 600 transitions, 11266 flow. Second operand has 35 states, 35 states have (on average 107.97142857142858) internal successors, (3779), 35 states have internal predecessors, (3779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:24,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:01:24,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 279 [2023-08-30 21:01:24,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:01:30,695 INFO L130 PetriNetUnfolder]: 2584/4618 cut-off events. [2023-08-30 21:01:30,695 INFO L131 PetriNetUnfolder]: For 82002/82002 co-relation queries the response was YES. [2023-08-30 21:01:30,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38188 conditions, 4618 events. 2584/4618 cut-off events. For 82002/82002 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 30195 event pairs, 612 based on Foata normal form. 2/4619 useless extension candidates. Maximal degree in co-relation 38074. Up to 2414 conditions per place. [2023-08-30 21:01:30,735 INFO L137 encePairwiseOnDemand]: 265/279 looper letters, 557 selfloop transitions, 187 changer transitions 26/770 dead transitions. [2023-08-30 21:01:30,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 770 transitions, 14103 flow [2023-08-30 21:01:30,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 21:01:30,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 21:01:30,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3626 transitions. [2023-08-30 21:01:30,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40613799283154123 [2023-08-30 21:01:30,739 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3626 transitions. [2023-08-30 21:01:30,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3626 transitions. [2023-08-30 21:01:30,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:01:30,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3626 transitions. [2023-08-30 21:01:30,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 113.3125) internal successors, (3626), 32 states have internal predecessors, (3626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:30,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 279.0) internal successors, (9207), 33 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:30,746 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 279.0) internal successors, (9207), 33 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:30,746 INFO L175 Difference]: Start difference. First operand has 353 places, 600 transitions, 11266 flow. Second operand 32 states and 3626 transitions. [2023-08-30 21:01:30,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 770 transitions, 14103 flow [2023-08-30 21:01:31,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 770 transitions, 13691 flow, removed 105 selfloop flow, removed 14 redundant places. [2023-08-30 21:01:31,138 INFO L231 Difference]: Finished difference. Result has 356 places, 631 transitions, 12024 flow [2023-08-30 21:01:31,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=10906, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=12024, PETRI_PLACES=356, PETRI_TRANSITIONS=631} [2023-08-30 21:01:31,139 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 327 predicate places. [2023-08-30 21:01:31,139 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 631 transitions, 12024 flow [2023-08-30 21:01:31,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 107.97142857142858) internal successors, (3779), 35 states have internal predecessors, (3779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:31,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:01:31,140 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] [2023-08-30 21:01:31,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-30 21:01:31,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-30 21:01:31,345 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:01:31,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:01:31,346 INFO L85 PathProgramCache]: Analyzing trace with hash -12107332, now seen corresponding path program 8 times [2023-08-30 21:01:31,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:01:31,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326932188] [2023-08-30 21:01:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:01:31,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:01:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:01:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:32,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:01:32,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326932188] [2023-08-30 21:01:32,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326932188] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:01:32,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142987616] [2023-08-30 21:01:32,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:01:32,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:32,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:01:32,917 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:01:32,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 21:01:33,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:01:33,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:01:33,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 21:01:33,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:01:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:33,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:01:33,774 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:01:33,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 62 [2023-08-30 21:01:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:34,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142987616] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:01:34,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:01:34,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 34 [2023-08-30 21:01:34,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291660402] [2023-08-30 21:01:34,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:01:34,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 21:01:34,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:01:34,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 21:01:34,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2023-08-30 21:01:37,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 279 [2023-08-30 21:01:37,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 631 transitions, 12024 flow. Second operand has 36 states, 36 states have (on average 100.80555555555556) internal successors, (3629), 36 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:37,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:01:37,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 279 [2023-08-30 21:01:37,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:01:43,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 21:01:47,397 INFO L130 PetriNetUnfolder]: 3141/5631 cut-off events. [2023-08-30 21:01:47,397 INFO L131 PetriNetUnfolder]: For 101354/101354 co-relation queries the response was YES. [2023-08-30 21:01:47,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46528 conditions, 5631 events. 3141/5631 cut-off events. For 101354/101354 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 38357 event pairs, 548 based on Foata normal form. 9/5639 useless extension candidates. Maximal degree in co-relation 46409. Up to 1458 conditions per place. [2023-08-30 21:01:47,447 INFO L137 encePairwiseOnDemand]: 266/279 looper letters, 495 selfloop transitions, 404 changer transitions 59/958 dead transitions. [2023-08-30 21:01:47,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 958 transitions, 17901 flow [2023-08-30 21:01:47,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 21:01:47,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 21:01:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3948 transitions. [2023-08-30 21:01:47,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824469630921244 [2023-08-30 21:01:47,452 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3948 transitions. [2023-08-30 21:01:47,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3948 transitions. [2023-08-30 21:01:47,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:01:47,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3948 transitions. [2023-08-30 21:01:47,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 106.70270270270271) internal successors, (3948), 37 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:47,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 279.0) internal successors, (10602), 38 states have internal predecessors, (10602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:47,463 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 279.0) internal successors, (10602), 38 states have internal predecessors, (10602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:47,463 INFO L175 Difference]: Start difference. First operand has 356 places, 631 transitions, 12024 flow. Second operand 37 states and 3948 transitions. [2023-08-30 21:01:47,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 958 transitions, 17901 flow [2023-08-30 21:01:48,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 958 transitions, 17752 flow, removed 21 selfloop flow, removed 15 redundant places. [2023-08-30 21:01:48,143 INFO L231 Difference]: Finished difference. Result has 391 places, 735 transitions, 15248 flow [2023-08-30 21:01:48,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=11903, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=15248, PETRI_PLACES=391, PETRI_TRANSITIONS=735} [2023-08-30 21:01:48,144 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 362 predicate places. [2023-08-30 21:01:48,144 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 735 transitions, 15248 flow [2023-08-30 21:01:48,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 100.80555555555556) internal successors, (3629), 36 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:48,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:01:48,145 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] [2023-08-30 21:01:48,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-30 21:01:48,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-30 21:01:48,346 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:01:48,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:01:48,346 INFO L85 PathProgramCache]: Analyzing trace with hash -54219418, now seen corresponding path program 9 times [2023-08-30 21:01:48,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:01:48,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867473466] [2023-08-30 21:01:48,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:01:48,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:01:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:01:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:49,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:01:49,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867473466] [2023-08-30 21:01:49,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867473466] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:01:49,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121673513] [2023-08-30 21:01:49,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:01:49,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:49,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:01:49,168 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:01:49,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 21:01:49,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:01:49,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:01:49,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 21:01:49,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:01:49,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:49,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:01:49,994 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:01:49,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 62 [2023-08-30 21:01:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:50,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121673513] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:01:50,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:01:50,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2023-08-30 21:01:50,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036271505] [2023-08-30 21:01:50,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:01:50,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 21:01:50,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:01:50,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 21:01:50,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 21:01:52,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 279 [2023-08-30 21:01:52,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 735 transitions, 15248 flow. Second operand has 34 states, 34 states have (on average 107.8529411764706) internal successors, (3667), 34 states have internal predecessors, (3667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:52,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:01:52,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 279 [2023-08-30 21:01:52,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:01:58,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 21:02:00,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 21:02:04,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 21:02:10,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 21:02:13,614 INFO L130 PetriNetUnfolder]: 3660/6509 cut-off events. [2023-08-30 21:02:13,614 INFO L131 PetriNetUnfolder]: For 133851/133851 co-relation queries the response was YES. [2023-08-30 21:02:13,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57334 conditions, 6509 events. 3660/6509 cut-off events. For 133851/133851 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 45279 event pairs, 614 based on Foata normal form. 3/6511 useless extension candidates. Maximal degree in co-relation 57202. Up to 1507 conditions per place. [2023-08-30 21:02:13,679 INFO L137 encePairwiseOnDemand]: 265/279 looper letters, 478 selfloop transitions, 574 changer transitions 41/1093 dead transitions. [2023-08-30 21:02:13,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1093 transitions, 22481 flow [2023-08-30 21:02:13,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-30 21:02:13,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-30 21:02:13,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4431 transitions. [2023-08-30 21:02:13,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4072236007719879 [2023-08-30 21:02:13,683 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4431 transitions. [2023-08-30 21:02:13,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4431 transitions. [2023-08-30 21:02:13,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:02:13,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4431 transitions. [2023-08-30 21:02:13,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 113.61538461538461) internal successors, (4431), 39 states have internal predecessors, (4431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:02:13,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 279.0) internal successors, (11160), 40 states have internal predecessors, (11160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:02:13,693 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 279.0) internal successors, (11160), 40 states have internal predecessors, (11160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:02:13,693 INFO L175 Difference]: Start difference. First operand has 391 places, 735 transitions, 15248 flow. Second operand 39 states and 4431 transitions. [2023-08-30 21:02:13,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1093 transitions, 22481 flow [2023-08-30 21:02:14,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1093 transitions, 22060 flow, removed 133 selfloop flow, removed 18 redundant places. [2023-08-30 21:02:14,726 INFO L231 Difference]: Finished difference. Result has 417 places, 884 transitions, 20114 flow [2023-08-30 21:02:14,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=14908, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=20114, PETRI_PLACES=417, PETRI_TRANSITIONS=884} [2023-08-30 21:02:14,727 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 388 predicate places. [2023-08-30 21:02:14,727 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 884 transitions, 20114 flow [2023-08-30 21:02:14,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 107.8529411764706) internal successors, (3667), 34 states have internal predecessors, (3667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:02:14,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:02:14,728 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] [2023-08-30 21:02:14,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 21:02:14,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-30 21:02:14,934 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:02:14,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:02:14,935 INFO L85 PathProgramCache]: Analyzing trace with hash -12708596, now seen corresponding path program 10 times [2023-08-30 21:02:14,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:02:14,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953485273] [2023-08-30 21:02:14,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:02:14,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:02:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:02:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:02:15,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:02:15,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953485273] [2023-08-30 21:02:15,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953485273] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:02:15,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778340579] [2023-08-30 21:02:15,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:02:15,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:02:15,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:02:15,817 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:02:15,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 21:02:15,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:02:15,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:02:15,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 21:02:15,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:02:16,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:02:16,125 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 22 treesize of output 24 [2023-08-30 21:02:16,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:02:16,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:02:16,311 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1570 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1570) c_~queue~0.base))) (or (let ((.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296))) (not (= (mod (select .cse0 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296) (mod |c_thread1Thread1of1ForFork0_~x~0#1| 4294967296)))))) is different from false [2023-08-30 21:02:16,345 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:02:16,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 114 [2023-08-30 21:02:16,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:02:16,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 56 [2023-08-30 21:02:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 21:02:17,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778340579] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:02:17,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:02:17,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 30 [2023-08-30 21:02:17,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750806956] [2023-08-30 21:02:17,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:02:17,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 21:02:17,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:02:17,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 21:02:17,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=830, Unknown=1, NotChecked=58, Total=992 [2023-08-30 21:02:17,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 279 [2023-08-30 21:02:17,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 884 transitions, 20114 flow. Second operand has 32 states, 32 states have (on average 90.09375) internal successors, (2883), 32 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:02:17,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:02:17,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 279 [2023-08-30 21:02:17,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:02:20,723 INFO L130 PetriNetUnfolder]: 3285/5918 cut-off events. [2023-08-30 21:02:20,723 INFO L131 PetriNetUnfolder]: For 143034/143034 co-relation queries the response was YES. [2023-08-30 21:02:20,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55242 conditions, 5918 events. 3285/5918 cut-off events. For 143034/143034 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 41028 event pairs, 618 based on Foata normal form. 169/6086 useless extension candidates. Maximal degree in co-relation 55103. Up to 2470 conditions per place. [2023-08-30 21:02:20,783 INFO L137 encePairwiseOnDemand]: 266/279 looper letters, 565 selfloop transitions, 370 changer transitions 36/971 dead transitions. [2023-08-30 21:02:20,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 971 transitions, 22519 flow [2023-08-30 21:02:20,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 21:02:20,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 21:02:20,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2385 transitions. [2023-08-30 21:02:20,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2023-08-30 21:02:20,785 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2385 transitions. [2023-08-30 21:02:20,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2385 transitions. [2023-08-30 21:02:20,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:02:20,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2385 transitions. [2023-08-30 21:02:20,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 95.4) internal successors, (2385), 25 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:02:20,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 279.0) internal successors, (7254), 26 states have internal predecessors, (7254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:02:20,793 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 279.0) internal successors, (7254), 26 states have internal predecessors, (7254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:02:20,793 INFO L175 Difference]: Start difference. First operand has 417 places, 884 transitions, 20114 flow. Second operand 25 states and 2385 transitions. [2023-08-30 21:02:20,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 971 transitions, 22519 flow [2023-08-30 21:02:21,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 971 transitions, 21960 flow, removed 163 selfloop flow, removed 20 redundant places. [2023-08-30 21:02:21,646 INFO L231 Difference]: Finished difference. Result has 423 places, 851 transitions, 19848 flow [2023-08-30 21:02:21,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=18903, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=19848, PETRI_PLACES=423, PETRI_TRANSITIONS=851} [2023-08-30 21:02:21,646 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 394 predicate places. [2023-08-30 21:02:21,646 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 851 transitions, 19848 flow [2023-08-30 21:02:21,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 90.09375) internal successors, (2883), 32 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:02:21,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:02:21,647 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] [2023-08-30 21:02:21,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 21:02:21,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:02:21,848 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:02:21,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:02:21,848 INFO L85 PathProgramCache]: Analyzing trace with hash -926409940, now seen corresponding path program 11 times [2023-08-30 21:02:21,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:02:21,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87864623] [2023-08-30 21:02:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:02:21,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:02:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:02:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:02:22,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:02:22,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87864623] [2023-08-30 21:02:22,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87864623] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:02:22,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266395098] [2023-08-30 21:02:22,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:02:22,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:02:22,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:02:22,794 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:02:22,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 21:02:22,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:02:22,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:02:22,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 21:02:22,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:02:23,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:02:23,213 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 20 treesize of output 22 [2023-08-30 21:02:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:02:23,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:02:23,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:02:23,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 118 [2023-08-30 21:02:23,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:02:23,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 60 [2023-08-30 21:02:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:02:24,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266395098] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:02:24,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:02:24,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2023-08-30 21:02:24,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280295232] [2023-08-30 21:02:24,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:02:24,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 21:02:24,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:02:24,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 21:02:24,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1169, Unknown=1, NotChecked=0, Total=1332 [2023-08-30 21:02:27,393 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] [2023-08-30 21:02:29,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:02:30,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 279 [2023-08-30 21:02:30,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 851 transitions, 19848 flow. Second operand has 37 states, 37 states have (on average 89.75675675675676) internal successors, (3321), 37 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:02:30,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:02:30,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 279 [2023-08-30 21:02:30,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:02:35,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 21:02:37,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 21:02:40,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 21:02:52,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:02:57,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:02:59,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:03:02,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 21:03:10,183 INFO L130 PetriNetUnfolder]: 3367/6105 cut-off events. [2023-08-30 21:03:10,183 INFO L131 PetriNetUnfolder]: For 148228/148228 co-relation queries the response was YES. [2023-08-30 21:03:10,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56965 conditions, 6105 events. 3367/6105 cut-off events. For 148228/148228 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 42927 event pairs, 602 based on Foata normal form. 3/6107 useless extension candidates. Maximal degree in co-relation 56823. Up to 1569 conditions per place. [2023-08-30 21:03:10,247 INFO L137 encePairwiseOnDemand]: 265/279 looper letters, 559 selfloop transitions, 529 changer transitions 37/1125 dead transitions. [2023-08-30 21:03:10,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 1125 transitions, 24808 flow [2023-08-30 21:03:10,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 21:03:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 21:03:10,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4003 transitions. [2023-08-30 21:03:10,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3416111964499061 [2023-08-30 21:03:10,250 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4003 transitions. [2023-08-30 21:03:10,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4003 transitions. [2023-08-30 21:03:10,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:03:10,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4003 transitions. [2023-08-30 21:03:10,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 95.30952380952381) internal successors, (4003), 42 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:10,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 279.0) internal successors, (11997), 43 states have internal predecessors, (11997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:10,260 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 279.0) internal successors, (11997), 43 states have internal predecessors, (11997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:10,260 INFO L175 Difference]: Start difference. First operand has 423 places, 851 transitions, 19848 flow. Second operand 42 states and 4003 transitions. [2023-08-30 21:03:10,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 1125 transitions, 24808 flow [2023-08-30 21:03:11,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1125 transitions, 24199 flow, removed 32 selfloop flow, removed 22 redundant places. [2023-08-30 21:03:11,088 INFO L231 Difference]: Finished difference. Result has 451 places, 900 transitions, 21637 flow [2023-08-30 21:03:11,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=19287, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=484, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=21637, PETRI_PLACES=451, PETRI_TRANSITIONS=900} [2023-08-30 21:03:11,089 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 422 predicate places. [2023-08-30 21:03:11,089 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 900 transitions, 21637 flow [2023-08-30 21:03:11,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 89.75675675675676) internal successors, (3321), 37 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:11,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:03:11,089 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] [2023-08-30 21:03:11,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 21:03:11,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 21:03:11,290 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:03:11,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:03:11,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1772761536, now seen corresponding path program 12 times [2023-08-30 21:03:11,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:03:11,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041201594] [2023-08-30 21:03:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:03:11,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:03:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:03:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:03:12,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:03:12,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041201594] [2023-08-30 21:03:12,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041201594] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:03:12,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048035004] [2023-08-30 21:03:12,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:03:12,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:03:12,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:03:12,681 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:03:12,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 21:03:12,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 21:03:12,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:03:12,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 21:03:12,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:03:13,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:03:13,191 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 22 treesize of output 24 [2023-08-30 21:03:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:03:13,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:03:13,786 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:03:13,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 118 [2023-08-30 21:03:13,809 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:03:13,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 60 [2023-08-30 21:03:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:03:14,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048035004] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:03:14,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:03:14,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2023-08-30 21:03:14,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514967927] [2023-08-30 21:03:14,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:03:14,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 21:03:14,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:03:14,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 21:03:14,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1326, Unknown=1, NotChecked=0, Total=1482 [2023-08-30 21:03:18,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:03:21,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:03:21,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 279 [2023-08-30 21:03:21,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 900 transitions, 21637 flow. Second operand has 39 states, 39 states have (on average 83.76923076923077) internal successors, (3267), 39 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:21,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:03:21,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 279 [2023-08-30 21:03:21,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:03:33,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:03:35,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:03:39,253 INFO L130 PetriNetUnfolder]: 3358/6087 cut-off events. [2023-08-30 21:03:39,253 INFO L131 PetriNetUnfolder]: For 157087/157087 co-relation queries the response was YES. [2023-08-30 21:03:39,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58283 conditions, 6087 events. 3358/6087 cut-off events. For 157087/157087 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 42634 event pairs, 714 based on Foata normal form. 3/6090 useless extension candidates. Maximal degree in co-relation 58132. Up to 1571 conditions per place. [2023-08-30 21:03:39,328 INFO L137 encePairwiseOnDemand]: 266/279 looper letters, 642 selfloop transitions, 401 changer transitions 37/1080 dead transitions. [2023-08-30 21:03:39,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 1080 transitions, 25265 flow [2023-08-30 21:03:39,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-30 21:03:39,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-30 21:03:39,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3370 transitions. [2023-08-30 21:03:39,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3178645538577627 [2023-08-30 21:03:39,331 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3370 transitions. [2023-08-30 21:03:39,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3370 transitions. [2023-08-30 21:03:39,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:03:39,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3370 transitions. [2023-08-30 21:03:39,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 88.6842105263158) internal successors, (3370), 38 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:39,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 279.0) internal successors, (10881), 39 states have internal predecessors, (10881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:39,338 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 279.0) internal successors, (10881), 39 states have internal predecessors, (10881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:39,338 INFO L175 Difference]: Start difference. First operand has 451 places, 900 transitions, 21637 flow. Second operand 38 states and 3370 transitions. [2023-08-30 21:03:39,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 1080 transitions, 25265 flow [2023-08-30 21:03:40,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 1080 transitions, 24901 flow, removed 50 selfloop flow, removed 25 redundant places. [2023-08-30 21:03:40,278 INFO L231 Difference]: Finished difference. Result has 467 places, 903 transitions, 22178 flow [2023-08-30 21:03:40,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=21295, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=22178, PETRI_PLACES=467, PETRI_TRANSITIONS=903} [2023-08-30 21:03:40,279 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 438 predicate places. [2023-08-30 21:03:40,279 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 903 transitions, 22178 flow [2023-08-30 21:03:40,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 83.76923076923077) internal successors, (3267), 39 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:40,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:03:40,280 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] [2023-08-30 21:03:40,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 21:03:40,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 21:03:40,492 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:03:40,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:03:40,493 INFO L85 PathProgramCache]: Analyzing trace with hash -638265102, now seen corresponding path program 13 times [2023-08-30 21:03:40,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:03:40,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152761234] [2023-08-30 21:03:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:03:40,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:03:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:03:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:03:41,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:03:41,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152761234] [2023-08-30 21:03:41,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152761234] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:03:41,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959493747] [2023-08-30 21:03:41,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:03:41,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:03:41,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:03:41,277 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:03:41,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 21:03:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:03:41,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 21:03:41,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:03:41,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:03:41,824 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 30 treesize of output 30 [2023-08-30 21:03:41,949 INFO L321 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2023-08-30 21:03:41,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 38 [2023-08-30 21:03:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:03:41,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:03:42,388 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:03:42,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 91 [2023-08-30 21:03:42,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:03:42,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2023-08-30 21:03:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:03:43,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959493747] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:03:43,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:03:43,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-30 21:03:43,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033243167] [2023-08-30 21:03:43,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:03:43,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 21:03:43,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:03:43,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 21:03:43,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1254, Unknown=1, NotChecked=0, Total=1406 [2023-08-30 21:03:43,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 279 [2023-08-30 21:03:43,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 903 transitions, 22178 flow. Second operand has 38 states, 38 states have (on average 89.8157894736842) internal successors, (3413), 38 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:43,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:03:43,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 279 [2023-08-30 21:03:43,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:03:47,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 21:03:51,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:03:54,165 INFO L130 PetriNetUnfolder]: 3386/6160 cut-off events. [2023-08-30 21:03:54,165 INFO L131 PetriNetUnfolder]: For 165356/165356 co-relation queries the response was YES. [2023-08-30 21:03:54,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59618 conditions, 6160 events. 3386/6160 cut-off events. For 165356/165356 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 43506 event pairs, 815 based on Foata normal form. 2/6162 useless extension candidates. Maximal degree in co-relation 59464. Up to 2776 conditions per place. [2023-08-30 21:03:54,234 INFO L137 encePairwiseOnDemand]: 266/279 looper letters, 781 selfloop transitions, 220 changer transitions 24/1025 dead transitions. [2023-08-30 21:03:54,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 1025 transitions, 25234 flow [2023-08-30 21:03:54,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 21:03:54,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 21:03:54,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2570 transitions. [2023-08-30 21:03:54,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34116553829815477 [2023-08-30 21:03:54,236 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2570 transitions. [2023-08-30 21:03:54,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2570 transitions. [2023-08-30 21:03:54,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:03:54,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2570 transitions. [2023-08-30 21:03:54,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 95.18518518518519) internal successors, (2570), 27 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:54,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 279.0) internal successors, (7812), 28 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:54,241 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 279.0) internal successors, (7812), 28 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:54,241 INFO L175 Difference]: Start difference. First operand has 467 places, 903 transitions, 22178 flow. Second operand 27 states and 2570 transitions. [2023-08-30 21:03:54,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 1025 transitions, 25234 flow [2023-08-30 21:03:55,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 1025 transitions, 24590 flow, removed 39 selfloop flow, removed 30 redundant places. [2023-08-30 21:03:55,285 INFO L231 Difference]: Finished difference. Result has 464 places, 916 transitions, 22517 flow [2023-08-30 21:03:55,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=21556, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=903, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=22517, PETRI_PLACES=464, PETRI_TRANSITIONS=916} [2023-08-30 21:03:55,286 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 435 predicate places. [2023-08-30 21:03:55,286 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 916 transitions, 22517 flow [2023-08-30 21:03:55,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 89.8157894736842) internal successors, (3413), 38 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:55,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:03:55,287 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] [2023-08-30 21:03:55,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-30 21:03:55,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 21:03:55,488 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:03:55,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:03:55,488 INFO L85 PathProgramCache]: Analyzing trace with hash 74357068, now seen corresponding path program 14 times [2023-08-30 21:03:55,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:03:55,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231032237] [2023-08-30 21:03:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:03:55,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:03:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:03:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:03:56,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:03:56,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231032237] [2023-08-30 21:03:56,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231032237] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:03:56,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138916405] [2023-08-30 21:03:56,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:03:56,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:03:56,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:03:56,816 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:03:56,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 21:03:56,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:03:56,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:03:56,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 21:03:56,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:03:57,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 21:03:57,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:03:57,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:03:57,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:03:57,411 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2023-08-30 21:03:57,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 35 [2023-08-30 21:03:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:03:57,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:04:00,638 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:04:00,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 97 [2023-08-30 21:04:00,729 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:04:00,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3884 treesize of output 3656 [2023-08-30 21:04:00,811 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:04:00,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:04:00,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 321 treesize of output 332 [2023-08-30 21:04:00,947 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:04:00,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 410 treesize of output 346 [2023-08-30 21:04:01,064 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:04:01,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 247 treesize of output 233 [2023-08-30 21:04:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:03,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138916405] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:04:03,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:04:03,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-30 21:04:03,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959827236] [2023-08-30 21:04:03,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:04:03,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 21:04:03,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:04:03,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 21:04:03,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1441, Unknown=8, NotChecked=0, Total=1640 [2023-08-30 21:04:03,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 279 [2023-08-30 21:04:03,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 916 transitions, 22517 flow. Second operand has 41 states, 41 states have (on average 83.6829268292683) internal successors, (3431), 41 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:03,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:04:03,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 279 [2023-08-30 21:04:03,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:04:13,621 INFO L130 PetriNetUnfolder]: 3526/6403 cut-off events. [2023-08-30 21:04:13,621 INFO L131 PetriNetUnfolder]: For 173496/173496 co-relation queries the response was YES. [2023-08-30 21:04:13,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62548 conditions, 6403 events. 3526/6403 cut-off events. For 173496/173496 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 45383 event pairs, 792 based on Foata normal form. 6/6408 useless extension candidates. Maximal degree in co-relation 62395. Up to 2775 conditions per place. [2023-08-30 21:04:13,876 INFO L137 encePairwiseOnDemand]: 267/279 looper letters, 781 selfloop transitions, 242 changer transitions 34/1057 dead transitions. [2023-08-30 21:04:13,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 1057 transitions, 26157 flow [2023-08-30 21:04:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 21:04:13,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 21:04:13,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2401 transitions. [2023-08-30 21:04:13,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3187309172972255 [2023-08-30 21:04:13,879 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2401 transitions. [2023-08-30 21:04:13,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2401 transitions. [2023-08-30 21:04:13,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:04:13,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2401 transitions. [2023-08-30 21:04:13,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 88.92592592592592) internal successors, (2401), 27 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:13,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 279.0) internal successors, (7812), 28 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:13,887 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 279.0) internal successors, (7812), 28 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:13,887 INFO L175 Difference]: Start difference. First operand has 464 places, 916 transitions, 22517 flow. Second operand 27 states and 2401 transitions. [2023-08-30 21:04:13,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 1057 transitions, 26157 flow [2023-08-30 21:04:14,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 1057 transitions, 25886 flow, removed 17 selfloop flow, removed 23 redundant places. [2023-08-30 21:04:14,770 INFO L231 Difference]: Finished difference. Result has 471 places, 943 transitions, 23467 flow [2023-08-30 21:04:14,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=22272, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=916, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=23467, PETRI_PLACES=471, PETRI_TRANSITIONS=943} [2023-08-30 21:04:14,771 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 442 predicate places. [2023-08-30 21:04:14,771 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 943 transitions, 23467 flow [2023-08-30 21:04:14,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 83.6829268292683) internal successors, (3431), 41 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:14,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:04:14,772 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] [2023-08-30 21:04:14,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 21:04:14,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 21:04:14,972 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:04:14,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:04:14,973 INFO L85 PathProgramCache]: Analyzing trace with hash -951919040, now seen corresponding path program 15 times [2023-08-30 21:04:14,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:04:14,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35222829] [2023-08-30 21:04:14,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:04:14,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:04:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:04:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:15,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:04:15,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35222829] [2023-08-30 21:04:15,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35222829] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:04:15,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455966035] [2023-08-30 21:04:15,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:04:15,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:04:15,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:04:15,844 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:04:15,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 21:04:15,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:04:15,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:04:16,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-30 21:04:16,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:04:16,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 21:04:16,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:04:16,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:04:16,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:04:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:16,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:04:19,559 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:04:19,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 98 [2023-08-30 21:04:19,630 INFO L321 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-30 21:04:19,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 476 treesize of output 465 [2023-08-30 21:04:19,675 INFO L321 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-30 21:04:19,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 442 treesize of output 358 [2023-08-30 21:04:19,736 INFO L321 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-30 21:04:19,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 338 treesize of output 306 [2023-08-30 21:04:19,819 INFO L321 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-30 21:04:19,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 223 treesize of output 217 [2023-08-30 21:04:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:21,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455966035] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:04:21,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:04:21,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2023-08-30 21:04:21,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673230417] [2023-08-30 21:04:21,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:04:21,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-30 21:04:21,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:04:21,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-30 21:04:21,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1342, Unknown=7, NotChecked=0, Total=1560 [2023-08-30 21:04:23,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 279 [2023-08-30 21:04:23,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 943 transitions, 23467 flow. Second operand has 40 states, 40 states have (on average 83.725) internal successors, (3349), 40 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:23,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:04:23,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 279 [2023-08-30 21:04:23,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:04:33,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:04:35,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:04:37,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:04:39,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:04:46,230 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] [2023-08-30 21:04:56,953 WARN L222 SmtUtils]: Spent 6.32s on a formula simplification. DAG size of input: 91 DAG size of output: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:05:14,026 INFO L130 PetriNetUnfolder]: 3911/6987 cut-off events. [2023-08-30 21:05:14,026 INFO L131 PetriNetUnfolder]: For 203388/203388 co-relation queries the response was YES. [2023-08-30 21:05:14,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70080 conditions, 6987 events. 3911/6987 cut-off events. For 203388/203388 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 49718 event pairs, 508 based on Foata normal form. 3/6989 useless extension candidates. Maximal degree in co-relation 69923. Up to 1836 conditions per place. [2023-08-30 21:05:14,118 INFO L137 encePairwiseOnDemand]: 265/279 looper letters, 784 selfloop transitions, 616 changer transitions 38/1438 dead transitions. [2023-08-30 21:05:14,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 1438 transitions, 33472 flow [2023-08-30 21:05:14,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-30 21:05:14,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-30 21:05:14,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 5040 transitions. [2023-08-30 21:05:14,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31692133559705715 [2023-08-30 21:05:14,121 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 5040 transitions. [2023-08-30 21:05:14,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 5040 transitions. [2023-08-30 21:05:14,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:05:14,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 5040 transitions. [2023-08-30 21:05:14,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 88.42105263157895) internal successors, (5040), 57 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:05:14,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 279.0) internal successors, (16182), 58 states have internal predecessors, (16182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:05:14,132 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 279.0) internal successors, (16182), 58 states have internal predecessors, (16182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:05:14,132 INFO L175 Difference]: Start difference. First operand has 471 places, 943 transitions, 23467 flow. Second operand 57 states and 5040 transitions. [2023-08-30 21:05:14,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 1438 transitions, 33472 flow [2023-08-30 21:05:15,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 1438 transitions, 33187 flow, removed 54 selfloop flow, removed 13 redundant places. [2023-08-30 21:05:15,596 INFO L231 Difference]: Finished difference. Result has 535 places, 1077 transitions, 28375 flow [2023-08-30 21:05:15,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=23213, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=491, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=28375, PETRI_PLACES=535, PETRI_TRANSITIONS=1077} [2023-08-30 21:05:15,597 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 506 predicate places. [2023-08-30 21:05:15,598 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 1077 transitions, 28375 flow [2023-08-30 21:05:15,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 83.725) internal successors, (3349), 40 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:05:15,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:05:15,598 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] [2023-08-30 21:05:15,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-30 21:05:15,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-08-30 21:05:15,799 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:05:15,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:05:15,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1825570338, now seen corresponding path program 16 times [2023-08-30 21:05:15,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:05:15,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645487549] [2023-08-30 21:05:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:05:15,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:05:15,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:05:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:05:16,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:05:16,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645487549] [2023-08-30 21:05:16,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645487549] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:05:16,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556166748] [2023-08-30 21:05:16,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:05:16,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:05:16,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:05:16,835 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:05:16,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 21:05:16,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:05:16,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:05:16,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 21:05:16,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:05:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:05:17,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:05:17,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:05:17,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-08-30 21:05:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:05:17,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556166748] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:05:17,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:05:17,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 27 [2023-08-30 21:05:17,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952940850] [2023-08-30 21:05:17,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:05:17,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 21:05:17,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:05:17,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 21:05:17,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2023-08-30 21:05:19,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 279 [2023-08-30 21:05:19,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 1077 transitions, 28375 flow. Second operand has 29 states, 29 states have (on average 110.13793103448276) internal successors, (3194), 29 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:05:19,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:05:19,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 279 [2023-08-30 21:05:19,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:05:25,839 INFO L130 PetriNetUnfolder]: 4513/7842 cut-off events. [2023-08-30 21:05:25,839 INFO L131 PetriNetUnfolder]: For 264366/264366 co-relation queries the response was YES. [2023-08-30 21:05:25,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85219 conditions, 7842 events. 4513/7842 cut-off events. For 264366/264366 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 54758 event pairs, 590 based on Foata normal form. 39/7880 useless extension candidates. Maximal degree in co-relation 85042. Up to 2079 conditions per place. [2023-08-30 21:05:26,167 INFO L137 encePairwiseOnDemand]: 267/279 looper letters, 614 selfloop transitions, 763 changer transitions 28/1405 dead transitions. [2023-08-30 21:05:26,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 1405 transitions, 37791 flow [2023-08-30 21:05:26,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 21:05:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 21:05:26,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4038 transitions. [2023-08-30 21:05:26,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41351766513056837 [2023-08-30 21:05:26,171 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4038 transitions. [2023-08-30 21:05:26,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4038 transitions. [2023-08-30 21:05:26,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:05:26,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4038 transitions. [2023-08-30 21:05:26,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 115.37142857142857) internal successors, (4038), 35 states have internal predecessors, (4038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:05:26,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 279.0) internal successors, (10044), 36 states have internal predecessors, (10044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:05:26,179 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 279.0) internal successors, (10044), 36 states have internal predecessors, (10044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:05:26,179 INFO L175 Difference]: Start difference. First operand has 535 places, 1077 transitions, 28375 flow. Second operand 35 states and 4038 transitions. [2023-08-30 21:05:26,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 1405 transitions, 37791 flow [2023-08-30 21:05:28,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 1405 transitions, 36708 flow, removed 357 selfloop flow, removed 19 redundant places. [2023-08-30 21:05:28,155 INFO L231 Difference]: Finished difference. Result has 566 places, 1235 transitions, 34811 flow [2023-08-30 21:05:28,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=26970, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1053, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=586, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=34811, PETRI_PLACES=566, PETRI_TRANSITIONS=1235} [2023-08-30 21:05:28,157 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 537 predicate places. [2023-08-30 21:05:28,157 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 1235 transitions, 34811 flow [2023-08-30 21:05:28,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 110.13793103448276) internal successors, (3194), 29 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:05:28,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:05:28,158 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] [2023-08-30 21:05:28,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-30 21:05:28,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:05:28,364 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:05:28,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:05:28,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1563787940, now seen corresponding path program 17 times [2023-08-30 21:05:28,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:05:28,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694186629] [2023-08-30 21:05:28,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:05:28,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:05:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:05:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:05:29,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:05:29,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694186629] [2023-08-30 21:05:29,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694186629] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:05:29,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175142966] [2023-08-30 21:05:29,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:05:29,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:05:29,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:05:29,376 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:05:29,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 21:05:29,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:05:29,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:05:29,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 21:05:29,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:05:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:05:29,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:05:30,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:05:30,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 62 [2023-08-30 21:05:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:05:31,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175142966] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:05:31,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:05:31,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 33 [2023-08-30 21:05:31,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712781335] [2023-08-30 21:05:31,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:05:31,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 21:05:31,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:05:31,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 21:05:31,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2023-08-30 21:05:33,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 279 [2023-08-30 21:05:33,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 1235 transitions, 34811 flow. Second operand has 35 states, 35 states have (on average 107.8) internal successors, (3773), 35 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:05:33,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:05:33,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 279 [2023-08-30 21:05:33,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:05:37,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 21:05:40,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 21:05:42,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 21:05:44,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 21:05:47,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 21:05:49,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 21:05:51,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 21:05:58,880 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 [] [2023-08-30 21:06:03,903 INFO L130 PetriNetUnfolder]: 4925/8496 cut-off events. [2023-08-30 21:06:03,903 INFO L131 PetriNetUnfolder]: For 306882/306882 co-relation queries the response was YES. [2023-08-30 21:06:03,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97278 conditions, 8496 events. 4925/8496 cut-off events. For 306882/306882 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 59601 event pairs, 493 based on Foata normal form. 5/8500 useless extension candidates. Maximal degree in co-relation 97085. Up to 2326 conditions per place. [2023-08-30 21:06:04,020 INFO L137 encePairwiseOnDemand]: 265/279 looper letters, 584 selfloop transitions, 952 changer transitions 41/1577 dead transitions. [2023-08-30 21:06:04,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 1577 transitions, 44130 flow [2023-08-30 21:06:04,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 21:06:04,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 21:06:04,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4530 transitions. [2023-08-30 21:06:04,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40591397849462363 [2023-08-30 21:06:04,023 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4530 transitions. [2023-08-30 21:06:04,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4530 transitions. [2023-08-30 21:06:04,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:06:04,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4530 transitions. [2023-08-30 21:06:04,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 113.25) internal successors, (4530), 40 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:06:04,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 279.0) internal successors, (11439), 41 states have internal predecessors, (11439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:06:04,031 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 279.0) internal successors, (11439), 41 states have internal predecessors, (11439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:06:04,031 INFO L175 Difference]: Start difference. First operand has 566 places, 1235 transitions, 34811 flow. Second operand 40 states and 4530 transitions. [2023-08-30 21:06:04,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 1577 transitions, 44130 flow [2023-08-30 21:06:06,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 1577 transitions, 43063 flow, removed 347 selfloop flow, removed 11 redundant places. [2023-08-30 21:06:06,427 INFO L231 Difference]: Finished difference. Result has 608 places, 1385 transitions, 41190 flow [2023-08-30 21:06:06,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=34016, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=813, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=41190, PETRI_PLACES=608, PETRI_TRANSITIONS=1385} [2023-08-30 21:06:06,428 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 579 predicate places. [2023-08-30 21:06:06,429 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 1385 transitions, 41190 flow [2023-08-30 21:06:06,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 107.8) internal successors, (3773), 35 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:06:06,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:06:06,429 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] [2023-08-30 21:06:06,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-30 21:06:06,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-30 21:06:06,630 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:06:06,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:06:06,630 INFO L85 PathProgramCache]: Analyzing trace with hash -780494062, now seen corresponding path program 18 times [2023-08-30 21:06:06,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:06:06,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799305835] [2023-08-30 21:06:06,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:06:06,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:06:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:06:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:06:08,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:06:08,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799305835] [2023-08-30 21:06:08,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799305835] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:06:08,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002484905] [2023-08-30 21:06:08,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:06:08,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:06:08,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:06:08,355 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:06:08,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 21:06:08,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:06:08,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:06:08,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-30 21:06:08,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:06:08,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 21:06:08,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:06:08,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:06:08,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:06:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:06:09,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:06:09,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:06:09,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 98 [2023-08-30 21:06:10,008 INFO L321 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-08-30 21:06:10,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 476 treesize of output 445 [2023-08-30 21:06:10,025 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-30 21:06:10,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 442 treesize of output 338 [2023-08-30 21:06:10,036 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-30 21:06:10,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 338 treesize of output 286 [2023-08-30 21:06:10,049 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-30 21:06:10,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 223 treesize of output 197 [2023-08-30 21:06:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:06:10,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002484905] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:06:10,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:06:10,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-30 21:06:10,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454786507] [2023-08-30 21:06:10,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:06:10,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-30 21:06:10,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:06:10,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-30 21:06:10,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1318, Unknown=6, NotChecked=0, Total=1560 [2023-08-30 21:06:11,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 279 [2023-08-30 21:06:11,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 1385 transitions, 41190 flow. Second operand has 40 states, 40 states have (on average 83.675) internal successors, (3347), 40 states have internal predecessors, (3347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:06:11,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:06:11,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 279 [2023-08-30 21:06:11,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:06:19,817 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] [2023-08-30 21:06:30,111 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] [2023-08-30 21:06:56,910 INFO L130 PetriNetUnfolder]: 5288/9218 cut-off events. [2023-08-30 21:06:56,910 INFO L131 PetriNetUnfolder]: For 372922/372922 co-relation queries the response was YES. [2023-08-30 21:06:57,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105680 conditions, 9218 events. 5288/9218 cut-off events. For 372922/372922 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 67107 event pairs, 542 based on Foata normal form. 3/9220 useless extension candidates. Maximal degree in co-relation 105473. Up to 2576 conditions per place. [2023-08-30 21:06:57,049 INFO L137 encePairwiseOnDemand]: 265/279 looper letters, 965 selfloop transitions, 1010 changer transitions 48/2023 dead transitions. [2023-08-30 21:06:57,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 672 places, 2023 transitions, 53817 flow [2023-08-30 21:06:57,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-30 21:06:57,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-30 21:06:57,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 5958 transitions. [2023-08-30 21:06:57,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31872893596533464 [2023-08-30 21:06:57,053 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 5958 transitions. [2023-08-30 21:06:57,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 5958 transitions. [2023-08-30 21:06:57,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:06:57,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 5958 transitions. [2023-08-30 21:06:57,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 88.92537313432835) internal successors, (5958), 67 states have internal predecessors, (5958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:06:57,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 279.0) internal successors, (18972), 68 states have internal predecessors, (18972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:06:57,065 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 279.0) internal successors, (18972), 68 states have internal predecessors, (18972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:06:57,065 INFO L175 Difference]: Start difference. First operand has 608 places, 1385 transitions, 41190 flow. Second operand 67 states and 5958 transitions. [2023-08-30 21:06:57,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 672 places, 2023 transitions, 53817 flow [2023-08-30 21:06:59,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 2023 transitions, 53000 flow, removed 185 selfloop flow, removed 17 redundant places. [2023-08-30 21:06:59,883 INFO L231 Difference]: Finished difference. Result has 667 places, 1477 transitions, 45271 flow [2023-08-30 21:06:59,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=40520, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=918, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=45271, PETRI_PLACES=667, PETRI_TRANSITIONS=1477} [2023-08-30 21:06:59,884 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 638 predicate places. [2023-08-30 21:06:59,884 INFO L495 AbstractCegarLoop]: Abstraction has has 667 places, 1477 transitions, 45271 flow [2023-08-30 21:06:59,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 83.675) internal successors, (3347), 40 states have internal predecessors, (3347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:06:59,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:06:59,885 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] [2023-08-30 21:06:59,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-30 21:07:00,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:07:00,089 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:07:00,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:07:00,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1915765604, now seen corresponding path program 19 times [2023-08-30 21:07:00,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:07:00,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866256662] [2023-08-30 21:07:00,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:07:00,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:07:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:07:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:07:01,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:07:01,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866256662] [2023-08-30 21:07:01,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866256662] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:07:01,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100989391] [2023-08-30 21:07:01,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:07:01,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:07:01,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:07:01,145 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:07:01,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-30 21:07:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:07:01,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 21:07:01,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:07:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:07:01,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:07:01,749 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:07:01,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 62 [2023-08-30 21:07:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:07:02,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100989391] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:07:02,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:07:02,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 27 [2023-08-30 21:07:02,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535987381] [2023-08-30 21:07:02,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:07:02,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 21:07:02,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:07:02,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 21:07:02,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2023-08-30 21:07:04,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 279 [2023-08-30 21:07:04,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 667 places, 1477 transitions, 45271 flow. Second operand has 29 states, 29 states have (on average 110.06896551724138) internal successors, (3192), 29 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:07:04,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:07:04,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 279 [2023-08-30 21:07:04,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:07:12,004 INFO L130 PetriNetUnfolder]: 5630/9750 cut-off events. [2023-08-30 21:07:12,004 INFO L131 PetriNetUnfolder]: For 412990/412990 co-relation queries the response was YES. [2023-08-30 21:07:12,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115711 conditions, 9750 events. 5630/9750 cut-off events. For 412990/412990 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 70563 event pairs, 858 based on Foata normal form. 4/9753 useless extension candidates. Maximal degree in co-relation 115495. Up to 2687 conditions per place. [2023-08-30 21:07:12,149 INFO L137 encePairwiseOnDemand]: 267/279 looper letters, 818 selfloop transitions, 881 changer transitions 47/1746 dead transitions. [2023-08-30 21:07:12,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 696 places, 1746 transitions, 53405 flow [2023-08-30 21:07:12,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 21:07:12,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 21:07:12,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4040 transitions. [2023-08-30 21:07:12,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41372247823860725 [2023-08-30 21:07:12,152 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4040 transitions. [2023-08-30 21:07:12,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4040 transitions. [2023-08-30 21:07:12,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:07:12,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4040 transitions. [2023-08-30 21:07:12,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 115.42857142857143) internal successors, (4040), 35 states have internal predecessors, (4040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:07:12,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 279.0) internal successors, (10044), 36 states have internal predecessors, (10044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:07:12,162 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 279.0) internal successors, (10044), 36 states have internal predecessors, (10044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:07:12,162 INFO L175 Difference]: Start difference. First operand has 667 places, 1477 transitions, 45271 flow. Second operand 35 states and 4040 transitions. [2023-08-30 21:07:12,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 696 places, 1746 transitions, 53405 flow [2023-08-30 21:07:15,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 654 places, 1746 transitions, 51762 flow, removed 135 selfloop flow, removed 42 redundant places. [2023-08-30 21:07:15,341 INFO L231 Difference]: Finished difference. Result has 668 places, 1581 transitions, 49349 flow [2023-08-30 21:07:15,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=43781, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=796, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=49349, PETRI_PLACES=668, PETRI_TRANSITIONS=1581} [2023-08-30 21:07:15,342 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 639 predicate places. [2023-08-30 21:07:15,342 INFO L495 AbstractCegarLoop]: Abstraction has has 668 places, 1581 transitions, 49349 flow [2023-08-30 21:07:15,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 110.06896551724138) internal successors, (3192), 29 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:07:15,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:07:15,343 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] [2023-08-30 21:07:15,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-30 21:07:15,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-30 21:07:15,544 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:07:15,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:07:15,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1209493662, now seen corresponding path program 20 times [2023-08-30 21:07:15,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:07:15,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763626059] [2023-08-30 21:07:15,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:07:15,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:07:15,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:07:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:07:16,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:07:16,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763626059] [2023-08-30 21:07:16,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763626059] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:07:16,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887783512] [2023-08-30 21:07:16,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:07:16,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:07:16,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:07:16,596 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:07:16,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-30 21:07:16,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:07:16,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:07:16,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 21:07:16,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:07:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:07:16,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:07:17,084 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:07:17,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-08-30 21:07:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:07:19,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887783512] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:07:19,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:07:19,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 27 [2023-08-30 21:07:19,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899501909] [2023-08-30 21:07:19,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:07:19,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 21:07:19,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:07:19,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 21:07:19,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=723, Unknown=1, NotChecked=0, Total=812 [2023-08-30 21:07:21,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 279 [2023-08-30 21:07:21,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 1581 transitions, 49349 flow. Second operand has 29 states, 29 states have (on average 110.13793103448276) internal successors, (3194), 29 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:07:21,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:07:21,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 279 [2023-08-30 21:07:21,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:07:29,738 INFO L130 PetriNetUnfolder]: 5629/9797 cut-off events. [2023-08-30 21:07:29,738 INFO L131 PetriNetUnfolder]: For 420953/420953 co-relation queries the response was YES. [2023-08-30 21:07:29,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117151 conditions, 9797 events. 5629/9797 cut-off events. For 420953/420953 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 71480 event pairs, 636 based on Foata normal form. 3/9799 useless extension candidates. Maximal degree in co-relation 116927. Up to 2734 conditions per place. [2023-08-30 21:07:29,881 INFO L137 encePairwiseOnDemand]: 266/279 looper letters, 769 selfloop transitions, 981 changer transitions 29/1779 dead transitions. [2023-08-30 21:07:29,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 1779 transitions, 55149 flow [2023-08-30 21:07:29,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 21:07:29,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 21:07:29,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4156 transitions. [2023-08-30 21:07:29,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137793707686181 [2023-08-30 21:07:29,884 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4156 transitions. [2023-08-30 21:07:29,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4156 transitions. [2023-08-30 21:07:29,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:07:29,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4156 transitions. [2023-08-30 21:07:29,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 115.44444444444444) internal successors, (4156), 36 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:07:29,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 279.0) internal successors, (10323), 37 states have internal predecessors, (10323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:07:29,892 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 279.0) internal successors, (10323), 37 states have internal predecessors, (10323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:07:29,892 INFO L175 Difference]: Start difference. First operand has 668 places, 1581 transitions, 49349 flow. Second operand 36 states and 4156 transitions. [2023-08-30 21:07:29,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 700 places, 1779 transitions, 55149 flow [2023-08-30 21:07:33,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 684 places, 1779 transitions, 54048 flow, removed 357 selfloop flow, removed 16 redundant places. [2023-08-30 21:07:33,449 INFO L231 Difference]: Finished difference. Result has 690 places, 1602 transitions, 51324 flow [2023-08-30 21:07:33,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=48283, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=960, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=51324, PETRI_PLACES=690, PETRI_TRANSITIONS=1602} [2023-08-30 21:07:33,450 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 661 predicate places. [2023-08-30 21:07:33,450 INFO L495 AbstractCegarLoop]: Abstraction has has 690 places, 1602 transitions, 51324 flow [2023-08-30 21:07:33,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 110.13793103448276) internal successors, (3194), 29 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:07:33,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:07:33,450 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] [2023-08-30 21:07:33,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-30 21:07:33,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-30 21:07:33,651 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:07:33,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:07:33,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1491004078, now seen corresponding path program 21 times [2023-08-30 21:07:33,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:07:33,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166524197] [2023-08-30 21:07:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:07:33,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:07:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:07:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:07:35,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:07:35,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166524197] [2023-08-30 21:07:35,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166524197] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:07:35,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459958606] [2023-08-30 21:07:35,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:07:35,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:07:35,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:07:35,172 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:07:35,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-30 21:07:35,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:07:35,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:07:35,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-30 21:07:35,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:07:35,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 21:07:35,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:07:35,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:07:35,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:07:35,965 INFO L321 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-30 21:07:35,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 38 [2023-08-30 21:07:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:07:36,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:07:39,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:07:39,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 97 [2023-08-30 21:07:39,503 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:07:39,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 956 treesize of output 926 [2023-08-30 21:07:39,586 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:07:39,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 435 treesize of output 421 [2023-08-30 21:07:39,698 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:07:39,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 385 treesize of output 321 [2023-08-30 21:07:39,782 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:07:39,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 222 treesize of output 233 [2023-08-30 21:07:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:07:41,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459958606] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:07:41,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:07:41,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-30 21:07:41,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124742253] [2023-08-30 21:07:41,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:07:41,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 21:07:41,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:07:41,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 21:07:41,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1439, Unknown=5, NotChecked=0, Total=1640 [2023-08-30 21:07:46,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 279 [2023-08-30 21:07:46,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 1602 transitions, 51324 flow. Second operand has 41 states, 41 states have (on average 83.6829268292683) internal successors, (3431), 41 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:07:46,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:07:46,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 279 [2023-08-30 21:07:46,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:07:58,208 INFO L130 PetriNetUnfolder]: 5925/10661 cut-off events. [2023-08-30 21:07:58,208 INFO L131 PetriNetUnfolder]: For 476117/476117 co-relation queries the response was YES. [2023-08-30 21:07:58,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125584 conditions, 10661 events. 5925/10661 cut-off events. For 476117/476117 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 82171 event pairs, 1235 based on Foata normal form. 3/10663 useless extension candidates. Maximal degree in co-relation 125359. Up to 4890 conditions per place. [2023-08-30 21:07:58,363 INFO L137 encePairwiseOnDemand]: 268/279 looper letters, 1355 selfloop transitions, 404 changer transitions 20/1779 dead transitions. [2023-08-30 21:07:58,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 709 places, 1779 transitions, 58436 flow [2023-08-30 21:07:58,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 21:07:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 21:07:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1956 transitions. [2023-08-30 21:07:58,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31867057673509286 [2023-08-30 21:07:58,366 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1956 transitions. [2023-08-30 21:07:58,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1956 transitions. [2023-08-30 21:07:58,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:07:58,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1956 transitions. [2023-08-30 21:07:58,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 88.9090909090909) internal successors, (1956), 22 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:07:58,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 279.0) internal successors, (6417), 23 states have internal predecessors, (6417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:07:58,372 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 279.0) internal successors, (6417), 23 states have internal predecessors, (6417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:07:58,372 INFO L175 Difference]: Start difference. First operand has 690 places, 1602 transitions, 51324 flow. Second operand 22 states and 1956 transitions. [2023-08-30 21:07:58,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 709 places, 1779 transitions, 58436 flow [2023-08-30 21:08:02,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 686 places, 1779 transitions, 57334 flow, removed 38 selfloop flow, removed 23 redundant places. [2023-08-30 21:08:02,417 INFO L231 Difference]: Finished difference. Result has 692 places, 1653 transitions, 53332 flow [2023-08-30 21:08:02,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=50234, PETRI_DIFFERENCE_MINUEND_PLACES=665, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=53332, PETRI_PLACES=692, PETRI_TRANSITIONS=1653} [2023-08-30 21:08:02,418 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 663 predicate places. [2023-08-30 21:08:02,418 INFO L495 AbstractCegarLoop]: Abstraction has has 692 places, 1653 transitions, 53332 flow [2023-08-30 21:08:02,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 83.6829268292683) internal successors, (3431), 41 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:08:02,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:08:02,419 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] [2023-08-30 21:08:02,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-30 21:08:02,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-30 21:08:02,620 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:08:02,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:08:02,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1880047428, now seen corresponding path program 22 times [2023-08-30 21:08:02,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:08:02,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847396880] [2023-08-30 21:08:02,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:08:02,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:08:02,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:08:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:08:03,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:08:03,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847396880] [2023-08-30 21:08:03,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847396880] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:08:03,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28884158] [2023-08-30 21:08:03,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:08:03,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:08:03,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:08:03,556 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:08:03,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-30 21:08:03,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:08:03,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:08:03,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 21:08:03,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:08:03,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 21:08:03,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:08:03,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:08:03,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:08:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:08:04,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:08:05,159 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:08:05,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 98 [2023-08-30 21:08:05,213 INFO L321 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-30 21:08:05,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3948 treesize of output 3699 [2023-08-30 21:08:05,246 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:08:05,249 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:08:05,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:08:05,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 328 treesize of output 322 [2023-08-30 21:08:05,280 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:08:05,282 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:08:05,305 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:08:05,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 302 treesize of output 270 [2023-08-30 21:08:05,357 INFO L321 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-30 21:08:05,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 301 treesize of output 217 [2023-08-30 21:08:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:08:06,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28884158] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:08:06,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:08:06,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 37 [2023-08-30 21:08:06,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792664658] [2023-08-30 21:08:06,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:08:06,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 21:08:06,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:08:06,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 21:08:06,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1300, Unknown=6, NotChecked=0, Total=1482 [2023-08-30 21:08:09,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 279 [2023-08-30 21:08:09,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 692 places, 1653 transitions, 53332 flow. Second operand has 39 states, 39 states have (on average 83.76923076923077) internal successors, (3267), 39 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:08:09,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:08:09,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 279 [2023-08-30 21:08:09,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:08:23,028 WARN L222 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:08:25,374 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] [2023-08-30 21:08:27,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:08:29,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:08:32,339 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] Killed by 15