/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 02:11:11,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 02:11:11,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 02:11:12,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 02:11:12,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 02:11:12,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 02:11:12,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 02:11:12,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 02:11:12,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 02:11:12,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 02:11:12,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 02:11:12,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 02:11:12,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 02:11:12,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 02:11:12,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 02:11:12,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 02:11:12,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 02:11:12,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 02:11:12,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 02:11:12,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 02:11:12,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 02:11:12,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 02:11:12,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 02:11:12,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 02:11:12,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 02:11:12,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 02:11:12,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 02:11:12,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 02:11:12,031 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 02:11:12,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 02:11:12,032 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 02:11:12,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 02:11:12,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 02:11:12,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 02:11:12,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 02:11:12,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 02:11:12,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 02:11:12,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 02:11:12,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 02:11:12,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 02:11:12,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 02:11:12,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 02:11:12,050 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 02:11:12,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 02:11:12,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 02:11:12,051 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 02:11:12,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 02:11:12,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 02:11:12,051 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 02:11:12,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 02:11:12,051 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 02:11:12,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 02:11:12,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 02:11:12,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 02:11:12,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 02:11:12,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 02:11:12,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 02:11:12,052 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 02:11:12,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 02:11:12,052 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 02:11:12,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 02:11:12,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 02:11:12,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 02:11:12,053 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 02:11:12,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 02:11:12,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 02:11:12,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 02:11:12,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 02:11:12,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 02:11:12,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 02:11:12,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 02:11:12,053 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 02:11:12,054 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 02:11:12,054 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 02:11:12,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 02:11:12,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 02:11:12,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 02:11:12,268 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 02:11:12,269 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 02:11:12,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-01-28 02:11:13,305 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 02:11:13,441 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 02:11:13,442 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-01-28 02:11:13,446 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcec4975f/b77ba1f767df4fc6a16ae8f8a82e0d0a/FLAGface74d4f [2023-01-28 02:11:13,456 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcec4975f/b77ba1f767df4fc6a16ae8f8a82e0d0a [2023-01-28 02:11:13,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 02:11:13,459 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 02:11:13,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 02:11:13,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 02:11:13,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 02:11:13,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 02:11:13" (1/1) ... [2023-01-28 02:11:13,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73d2f5bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:11:13, skipping insertion in model container [2023-01-28 02:11:13,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 02:11:13" (1/1) ... [2023-01-28 02:11:13,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 02:11:13,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 02:11:13,582 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/array-eq-symm.wvr.c[2251,2264] [2023-01-28 02:11:13,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 02:11:13,595 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 02:11:13,612 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/array-eq-symm.wvr.c[2251,2264] [2023-01-28 02:11:13,614 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 02:11:13,626 INFO L208 MainTranslator]: Completed translation [2023-01-28 02:11:13,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:11:13 WrapperNode [2023-01-28 02:11:13,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 02:11:13,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 02:11:13,627 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 02:11:13,627 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 02:11:13,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:11:13" (1/1) ... [2023-01-28 02:11:13,637 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:11:13" (1/1) ... [2023-01-28 02:11:13,651 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 116 [2023-01-28 02:11:13,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 02:11:13,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 02:11:13,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 02:11:13,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 02:11:13,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:11:13" (1/1) ... [2023-01-28 02:11:13,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:11:13" (1/1) ... [2023-01-28 02:11:13,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:11:13" (1/1) ... [2023-01-28 02:11:13,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:11:13" (1/1) ... [2023-01-28 02:11:13,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:11:13" (1/1) ... [2023-01-28 02:11:13,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:11:13" (1/1) ... [2023-01-28 02:11:13,668 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:11:13" (1/1) ... [2023-01-28 02:11:13,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:11:13" (1/1) ... [2023-01-28 02:11:13,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 02:11:13,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 02:11:13,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 02:11:13,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 02:11:13,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:11:13" (1/1) ... [2023-01-28 02:11:13,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 02:11:13,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:13,705 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 02:11:13,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 02:11:13,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 02:11:13,746 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 02:11:13,747 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 02:11:13,747 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 02:11:13,747 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 02:11:13,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 02:11:13,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 02:11:13,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 02:11:13,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 02:11:13,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 02:11:13,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 02:11:13,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 02:11:13,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 02:11:13,749 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 02:11:13,850 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 02:11:13,851 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 02:11:14,093 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 02:11:14,103 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 02:11:14,103 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-28 02:11:14,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:11:14 BoogieIcfgContainer [2023-01-28 02:11:14,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 02:11:14,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 02:11:14,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 02:11:14,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 02:11:14,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 02:11:13" (1/3) ... [2023-01-28 02:11:14,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5751d11f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 02:11:14, skipping insertion in model container [2023-01-28 02:11:14,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:11:13" (2/3) ... [2023-01-28 02:11:14,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5751d11f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 02:11:14, skipping insertion in model container [2023-01-28 02:11:14,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:11:14" (3/3) ... [2023-01-28 02:11:14,111 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2023-01-28 02:11:14,131 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 02:11:14,131 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 02:11:14,132 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 02:11:14,184 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 02:11:14,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 163 transitions, 342 flow [2023-01-28 02:11:14,268 INFO L130 PetriNetUnfolder]: 15/161 cut-off events. [2023-01-28 02:11:14,268 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 02:11:14,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 161 events. 15/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 126 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 122. Up to 3 conditions per place. [2023-01-28 02:11:14,283 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 163 transitions, 342 flow [2023-01-28 02:11:14,288 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 153 transitions, 318 flow [2023-01-28 02:11:14,290 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 02:11:14,307 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 153 transitions, 318 flow [2023-01-28 02:11:14,309 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 153 transitions, 318 flow [2023-01-28 02:11:14,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 153 transitions, 318 flow [2023-01-28 02:11:14,334 INFO L130 PetriNetUnfolder]: 15/153 cut-off events. [2023-01-28 02:11:14,335 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 02:11:14,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 153 events. 15/153 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 126 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 122. Up to 3 conditions per place. [2023-01-28 02:11:14,336 INFO L119 LiptonReduction]: Number of co-enabled transitions 992 [2023-01-28 02:11:18,056 INFO L134 LiptonReduction]: Checked pairs total: 1281 [2023-01-28 02:11:18,057 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-01-28 02:11:18,067 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 02:11:18,071 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=false, 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;@2f8b7503, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 02:11:18,071 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 02:11:18,075 INFO L130 PetriNetUnfolder]: 5/18 cut-off events. [2023-01-28 02:11:18,075 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 02:11:18,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:18,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:18,075 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:18,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:18,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1496650072, now seen corresponding path program 1 times [2023-01-28 02:11:18,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:18,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767875832] [2023-01-28 02:11:18,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:18,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:18,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:18,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767875832] [2023-01-28 02:11:18,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767875832] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:11:18,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:11:18,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 02:11:18,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067803099] [2023-01-28 02:11:18,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:11:18,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 02:11:18,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:18,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 02:11:18,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 02:11:18,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 324 [2023-01-28 02:11:18,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:18,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:18,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 324 [2023-01-28 02:11:18,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:18,572 INFO L130 PetriNetUnfolder]: 71/121 cut-off events. [2023-01-28 02:11:18,572 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-28 02:11:18,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 121 events. 71/121 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 274 event pairs, 15 based on Foata normal form. 1/80 useless extension candidates. Maximal degree in co-relation 204. Up to 73 conditions per place. [2023-01-28 02:11:18,587 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 27 selfloop transitions, 3 changer transitions 1/31 dead transitions. [2023-01-28 02:11:18,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 31 transitions, 145 flow [2023-01-28 02:11:18,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 02:11:18,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 02:11:18,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2023-01-28 02:11:18,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44650205761316875 [2023-01-28 02:11:18,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2023-01-28 02:11:18,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2023-01-28 02:11:18,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:18,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2023-01-28 02:11:18,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:18,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:18,620 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:18,622 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 50 flow. Second operand 3 states and 434 transitions. [2023-01-28 02:11:18,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 31 transitions, 145 flow [2023-01-28 02:11:18,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 31 transitions, 131 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 02:11:18,626 INFO L231 Difference]: Finished difference. Result has 20 places, 21 transitions, 61 flow [2023-01-28 02:11:18,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=20, PETRI_TRANSITIONS=21} [2023-01-28 02:11:18,630 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-01-28 02:11:18,631 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 21 transitions, 61 flow [2023-01-28 02:11:18,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:18,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:18,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:18,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 02:11:18,632 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:18,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:18,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1210615754, now seen corresponding path program 1 times [2023-01-28 02:11:18,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:18,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636231315] [2023-01-28 02:11:18,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:18,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:18,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:18,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636231315] [2023-01-28 02:11:18,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636231315] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:11:18,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:11:18,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 02:11:18,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292728389] [2023-01-28 02:11:18,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:11:18,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 02:11:18,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:18,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 02:11:18,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 02:11:18,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-01-28 02:11:18,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 21 transitions, 61 flow. Second operand has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:18,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:18,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-01-28 02:11:18,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:18,857 INFO L130 PetriNetUnfolder]: 125/225 cut-off events. [2023-01-28 02:11:18,858 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2023-01-28 02:11:18,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 225 events. 125/225 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 675 event pairs, 71 based on Foata normal form. 16/213 useless extension candidates. Maximal degree in co-relation 200. Up to 122 conditions per place. [2023-01-28 02:11:18,859 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 36 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-01-28 02:11:18,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 39 transitions, 186 flow [2023-01-28 02:11:18,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 02:11:18,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 02:11:18,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 493 transitions. [2023-01-28 02:11:18,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38040123456790126 [2023-01-28 02:11:18,861 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 493 transitions. [2023-01-28 02:11:18,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 493 transitions. [2023-01-28 02:11:18,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:18,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 493 transitions. [2023-01-28 02:11:18,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.25) internal successors, (493), 4 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:18,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:18,865 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:18,865 INFO L175 Difference]: Start difference. First operand has 20 places, 21 transitions, 61 flow. Second operand 4 states and 493 transitions. [2023-01-28 02:11:18,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 39 transitions, 186 flow [2023-01-28 02:11:18,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 02:11:18,866 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 80 flow [2023-01-28 02:11:18,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2023-01-28 02:11:18,866 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2023-01-28 02:11:18,866 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 80 flow [2023-01-28 02:11:18,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:18,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:18,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:18,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 02:11:18,867 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:18,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:18,868 INFO L85 PathProgramCache]: Analyzing trace with hash 991297935, now seen corresponding path program 1 times [2023-01-28 02:11:18,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:18,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483487371] [2023-01-28 02:11:18,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:18,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:18,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:18,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483487371] [2023-01-28 02:11:18,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483487371] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:11:18,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:11:18,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 02:11:18,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632121008] [2023-01-28 02:11:18,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:11:18,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 02:11:18,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:18,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 02:11:18,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 02:11:18,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-01-28 02:11:18,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:18,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:18,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-01-28 02:11:18,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:18,979 INFO L130 PetriNetUnfolder]: 81/151 cut-off events. [2023-01-28 02:11:18,980 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2023-01-28 02:11:18,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 151 events. 81/151 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 397 event pairs, 45 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 294. Up to 122 conditions per place. [2023-01-28 02:11:18,981 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 20 selfloop transitions, 2 changer transitions 12/34 dead transitions. [2023-01-28 02:11:18,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 34 transitions, 174 flow [2023-01-28 02:11:18,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 02:11:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 02:11:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 489 transitions. [2023-01-28 02:11:18,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3773148148148148 [2023-01-28 02:11:18,982 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 489 transitions. [2023-01-28 02:11:18,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 489 transitions. [2023-01-28 02:11:18,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:18,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 489 transitions. [2023-01-28 02:11:18,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:18,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:18,986 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:18,986 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 80 flow. Second operand 4 states and 489 transitions. [2023-01-28 02:11:18,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 34 transitions, 174 flow [2023-01-28 02:11:18,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 168 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 02:11:18,987 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 74 flow [2023-01-28 02:11:18,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-01-28 02:11:18,988 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2023-01-28 02:11:18,988 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 74 flow [2023-01-28 02:11:18,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:18,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:18,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:18,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 02:11:18,989 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:18,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:18,989 INFO L85 PathProgramCache]: Analyzing trace with hash -369944271, now seen corresponding path program 1 times [2023-01-28 02:11:18,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:18,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620387131] [2023-01-28 02:11:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:18,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:11:19,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:19,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620387131] [2023-01-28 02:11:19,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620387131] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:11:19,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:11:19,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 02:11:19,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137942487] [2023-01-28 02:11:19,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:11:19,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:11:19,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:19,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:11:19,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 02:11:19,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-01-28 02:11:19,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 74 flow. Second operand has 5 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:19,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:19,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-01-28 02:11:19,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:19,129 INFO L130 PetriNetUnfolder]: 150/268 cut-off events. [2023-01-28 02:11:19,129 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2023-01-28 02:11:19,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 268 events. 150/268 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 851 event pairs, 70 based on Foata normal form. 16/281 useless extension candidates. Maximal degree in co-relation 639. Up to 106 conditions per place. [2023-01-28 02:11:19,130 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 43 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2023-01-28 02:11:19,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 49 transitions, 248 flow [2023-01-28 02:11:19,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:11:19,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:11:19,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 616 transitions. [2023-01-28 02:11:19,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802469135802469 [2023-01-28 02:11:19,132 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 616 transitions. [2023-01-28 02:11:19,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 616 transitions. [2023-01-28 02:11:19,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:19,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 616 transitions. [2023-01-28 02:11:19,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.2) internal successors, (616), 5 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:19,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:19,137 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:19,137 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 74 flow. Second operand 5 states and 616 transitions. [2023-01-28 02:11:19,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 49 transitions, 248 flow [2023-01-28 02:11:19,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 49 transitions, 236 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-01-28 02:11:19,138 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 103 flow [2023-01-28 02:11:19,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-01-28 02:11:19,139 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-01-28 02:11:19,139 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 103 flow [2023-01-28 02:11:19,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:19,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:19,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:19,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 02:11:19,140 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:19,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:19,140 INFO L85 PathProgramCache]: Analyzing trace with hash 631656796, now seen corresponding path program 1 times [2023-01-28 02:11:19,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:19,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085141395] [2023-01-28 02:11:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:19,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:11:19,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:19,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085141395] [2023-01-28 02:11:19,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085141395] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:11:19,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:11:19,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 02:11:19,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533744804] [2023-01-28 02:11:19,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:11:19,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:11:19,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:19,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:11:19,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 02:11:19,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-01-28 02:11:19,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:19,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:19,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-01-28 02:11:19,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:19,279 INFO L130 PetriNetUnfolder]: 132/238 cut-off events. [2023-01-28 02:11:19,279 INFO L131 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2023-01-28 02:11:19,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 238 events. 132/238 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 712 event pairs, 54 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 603. Up to 113 conditions per place. [2023-01-28 02:11:19,280 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 32 selfloop transitions, 5 changer transitions 10/47 dead transitions. [2023-01-28 02:11:19,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 47 transitions, 258 flow [2023-01-28 02:11:19,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:11:19,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:11:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 614 transitions. [2023-01-28 02:11:19,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790123456790123 [2023-01-28 02:11:19,282 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 614 transitions. [2023-01-28 02:11:19,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 614 transitions. [2023-01-28 02:11:19,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:19,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 614 transitions. [2023-01-28 02:11:19,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:19,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:19,286 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:19,286 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 103 flow. Second operand 5 states and 614 transitions. [2023-01-28 02:11:19,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 47 transitions, 258 flow [2023-01-28 02:11:19,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 47 transitions, 248 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-28 02:11:19,288 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 113 flow [2023-01-28 02:11:19,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-01-28 02:11:19,289 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2023-01-28 02:11:19,289 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 113 flow [2023-01-28 02:11:19,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:19,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:19,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:19,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 02:11:19,290 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:19,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:19,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1758776951, now seen corresponding path program 1 times [2023-01-28 02:11:19,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:19,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143624782] [2023-01-28 02:11:19,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:19,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:11:19,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:19,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143624782] [2023-01-28 02:11:19,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143624782] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:19,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766083178] [2023-01-28 02:11:19,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:19,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:19,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:19,467 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) [2023-01-28 02:11:19,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 02:11:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:19,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 02:11:19,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:11:19,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:19,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:11:19,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766083178] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:19,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 02:11:19,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2023-01-28 02:11:19,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784200007] [2023-01-28 02:11:19,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:11:19,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 02:11:19,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:19,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 02:11:19,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-01-28 02:11:19,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 324 [2023-01-28 02:11:19,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 113.66666666666667) internal successors, (682), 6 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:19,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:19,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 324 [2023-01-28 02:11:19,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:19,893 INFO L130 PetriNetUnfolder]: 125/235 cut-off events. [2023-01-28 02:11:19,893 INFO L131 PetriNetUnfolder]: For 146/146 co-relation queries the response was YES. [2023-01-28 02:11:19,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 235 events. 125/235 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 756 event pairs, 41 based on Foata normal form. 10/244 useless extension candidates. Maximal degree in co-relation 629. Up to 85 conditions per place. [2023-01-28 02:11:19,895 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 38 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2023-01-28 02:11:19,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 46 transitions, 271 flow [2023-01-28 02:11:19,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 02:11:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 02:11:19,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 820 transitions. [2023-01-28 02:11:19,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36155202821869487 [2023-01-28 02:11:19,897 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 820 transitions. [2023-01-28 02:11:19,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 820 transitions. [2023-01-28 02:11:19,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:19,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 820 transitions. [2023-01-28 02:11:19,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 117.14285714285714) internal successors, (820), 7 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:19,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:19,901 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:19,902 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 113 flow. Second operand 7 states and 820 transitions. [2023-01-28 02:11:19,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 46 transitions, 271 flow [2023-01-28 02:11:19,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 46 transitions, 262 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-01-28 02:11:19,903 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 136 flow [2023-01-28 02:11:19,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=136, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-01-28 02:11:19,904 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-01-28 02:11:19,904 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 136 flow [2023-01-28 02:11:19,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.66666666666667) internal successors, (682), 6 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:19,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:19,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:19,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:20,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-28 02:11:20,112 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:20,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:20,112 INFO L85 PathProgramCache]: Analyzing trace with hash 721061444, now seen corresponding path program 1 times [2023-01-28 02:11:20,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:20,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380485582] [2023-01-28 02:11:20,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:20,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:20,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:20,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380485582] [2023-01-28 02:11:20,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380485582] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:20,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257385842] [2023-01-28 02:11:20,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:20,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:20,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:20,477 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) [2023-01-28 02:11:20,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 02:11:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:20,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 02:11:20,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:20,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:20,911 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 02:11:20,912 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 40 treesize of output 56 [2023-01-28 02:11:20,938 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 02:11:20,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 02:11:20,944 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 02:11:20,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 02:11:21,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:21,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257385842] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:21,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 02:11:21,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 18 [2023-01-28 02:11:21,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695874141] [2023-01-28 02:11:21,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:11:21,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 02:11:21,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:21,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 02:11:21,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-01-28 02:11:21,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 324 [2023-01-28 02:11:21,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 136 flow. Second operand has 8 states, 8 states have (on average 94.125) internal successors, (753), 8 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:21,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:21,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 324 [2023-01-28 02:11:21,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:21,288 INFO L130 PetriNetUnfolder]: 138/255 cut-off events. [2023-01-28 02:11:21,288 INFO L131 PetriNetUnfolder]: For 255/255 co-relation queries the response was YES. [2023-01-28 02:11:21,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 765 conditions, 255 events. 138/255 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 844 event pairs, 30 based on Foata normal form. 2/256 useless extension candidates. Maximal degree in co-relation 735. Up to 198 conditions per place. [2023-01-28 02:11:21,290 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 29 selfloop transitions, 11 changer transitions 4/44 dead transitions. [2023-01-28 02:11:21,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 278 flow [2023-01-28 02:11:21,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 02:11:21,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 02:11:21,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 778 transitions. [2023-01-28 02:11:21,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3001543209876543 [2023-01-28 02:11:21,293 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 778 transitions. [2023-01-28 02:11:21,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 778 transitions. [2023-01-28 02:11:21,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:21,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 778 transitions. [2023-01-28 02:11:21,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.25) internal successors, (778), 8 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) [2023-01-28 02:11:21,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:21,298 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:21,299 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 136 flow. Second operand 8 states and 778 transitions. [2023-01-28 02:11:21,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 278 flow [2023-01-28 02:11:21,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 260 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-01-28 02:11:21,301 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 185 flow [2023-01-28 02:11:21,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=185, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-01-28 02:11:21,301 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-01-28 02:11:21,302 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 185 flow [2023-01-28 02:11:21,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 94.125) internal successors, (753), 8 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:21,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:21,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:21,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:21,507 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,SelfDestructingSolverStorable6 [2023-01-28 02:11:21,510 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:21,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:21,510 INFO L85 PathProgramCache]: Analyzing trace with hash -867319260, now seen corresponding path program 2 times [2023-01-28 02:11:21,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:21,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156075336] [2023-01-28 02:11:21,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:21,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:21,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:21,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156075336] [2023-01-28 02:11:21,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156075336] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:21,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593277430] [2023-01-28 02:11:21,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:11:21,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:21,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:21,825 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) [2023-01-28 02:11:21,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 02:11:21,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:11:21,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:11:21,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 02:11:21,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:22,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:22,131 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-28 02:11:22,131 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 47 treesize of output 80 [2023-01-28 02:11:22,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:22,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593277430] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:22,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 02:11:22,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 19 [2023-01-28 02:11:22,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264623690] [2023-01-28 02:11:22,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:11:22,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 02:11:22,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:22,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 02:11:22,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-01-28 02:11:22,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 324 [2023-01-28 02:11:22,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 185 flow. Second operand has 8 states, 8 states have (on average 94.125) internal successors, (753), 8 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:22,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:22,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 324 [2023-01-28 02:11:22,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:22,446 INFO L130 PetriNetUnfolder]: 133/248 cut-off events. [2023-01-28 02:11:22,447 INFO L131 PetriNetUnfolder]: For 319/319 co-relation queries the response was YES. [2023-01-28 02:11:22,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 248 events. 133/248 cut-off events. For 319/319 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 805 event pairs, 35 based on Foata normal form. 2/249 useless extension candidates. Maximal degree in co-relation 842. Up to 196 conditions per place. [2023-01-28 02:11:22,450 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 30 selfloop transitions, 10 changer transitions 7/47 dead transitions. [2023-01-28 02:11:22,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 346 flow [2023-01-28 02:11:22,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 02:11:22,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 02:11:22,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 777 transitions. [2023-01-28 02:11:22,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29976851851851855 [2023-01-28 02:11:22,453 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 777 transitions. [2023-01-28 02:11:22,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 777 transitions. [2023-01-28 02:11:22,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:22,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 777 transitions. [2023-01-28 02:11:22,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.125) internal successors, (777), 8 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:22,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:22,459 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:22,459 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 185 flow. Second operand 8 states and 777 transitions. [2023-01-28 02:11:22,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 346 flow [2023-01-28 02:11:22,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 318 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-01-28 02:11:22,462 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 212 flow [2023-01-28 02:11:22,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=212, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-01-28 02:11:22,465 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-01-28 02:11:22,465 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 212 flow [2023-01-28 02:11:22,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 94.125) internal successors, (753), 8 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:22,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:22,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:22,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:22,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:22,673 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:22,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:22,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1485650043, now seen corresponding path program 1 times [2023-01-28 02:11:22,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:22,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592366517] [2023-01-28 02:11:22,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:22,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:23,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:23,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592366517] [2023-01-28 02:11:23,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592366517] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:11:23,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:11:23,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-28 02:11:23,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549417510] [2023-01-28 02:11:23,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:11:23,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 02:11:23,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:23,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 02:11:23,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-01-28 02:11:23,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 324 [2023-01-28 02:11:23,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 212 flow. Second operand has 9 states, 9 states have (on average 105.88888888888889) internal successors, (953), 9 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:23,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:23,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 324 [2023-01-28 02:11:23,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:23,258 INFO L130 PetriNetUnfolder]: 126/239 cut-off events. [2023-01-28 02:11:23,258 INFO L131 PetriNetUnfolder]: For 344/344 co-relation queries the response was YES. [2023-01-28 02:11:23,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 239 events. 126/239 cut-off events. For 344/344 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 777 event pairs, 38 based on Foata normal form. 4/242 useless extension candidates. Maximal degree in co-relation 847. Up to 192 conditions per place. [2023-01-28 02:11:23,260 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 30 selfloop transitions, 8 changer transitions 10/48 dead transitions. [2023-01-28 02:11:23,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 369 flow [2023-01-28 02:11:23,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:11:23,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:11:23,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 560 transitions. [2023-01-28 02:11:23,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.345679012345679 [2023-01-28 02:11:23,262 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 560 transitions. [2023-01-28 02:11:23,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 560 transitions. [2023-01-28 02:11:23,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:23,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 560 transitions. [2023-01-28 02:11:23,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:23,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:23,266 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:23,266 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 212 flow. Second operand 5 states and 560 transitions. [2023-01-28 02:11:23,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 369 flow [2023-01-28 02:11:23,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 48 transitions, 354 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-01-28 02:11:23,268 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 225 flow [2023-01-28 02:11:23,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2023-01-28 02:11:23,269 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-01-28 02:11:23,269 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 225 flow [2023-01-28 02:11:23,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 105.88888888888889) internal successors, (953), 9 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:23,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:23,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:23,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 02:11:23,270 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:23,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:23,270 INFO L85 PathProgramCache]: Analyzing trace with hash -708957346, now seen corresponding path program 3 times [2023-01-28 02:11:23,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:23,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412716975] [2023-01-28 02:11:23,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:23,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:23,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:23,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:23,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412716975] [2023-01-28 02:11:23,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412716975] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:23,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146964980] [2023-01-28 02:11:23,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:11:23,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:23,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:23,630 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) [2023-01-28 02:11:23,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 02:11:23,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 02:11:23,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:11:23,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 02:11:23,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:23,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:23,985 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 02:11:23,985 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 40 treesize of output 56 [2023-01-28 02:11:24,003 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 02:11:24,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 02:11:24,008 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 02:11:24,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 02:11:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:24,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146964980] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:11:24,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:11:24,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-01-28 02:11:24,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473398636] [2023-01-28 02:11:24,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:11:24,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 02:11:24,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:24,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 02:11:24,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-01-28 02:11:24,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-28 02:11:24,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 225 flow. Second operand has 18 states, 18 states have (on average 89.88888888888889) internal successors, (1618), 18 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:24,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:24,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-28 02:11:24,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:24,352 INFO L130 PetriNetUnfolder]: 135/253 cut-off events. [2023-01-28 02:11:24,353 INFO L131 PetriNetUnfolder]: For 424/424 co-relation queries the response was YES. [2023-01-28 02:11:24,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 955 conditions, 253 events. 135/253 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 839 event pairs, 6 based on Foata normal form. 12/264 useless extension candidates. Maximal degree in co-relation 924. Up to 196 conditions per place. [2023-01-28 02:11:24,354 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 32 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2023-01-28 02:11:24,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 47 transitions, 371 flow [2023-01-28 02:11:24,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 02:11:24,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 02:11:24,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 835 transitions. [2023-01-28 02:11:24,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28635116598079563 [2023-01-28 02:11:24,357 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 835 transitions. [2023-01-28 02:11:24,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 835 transitions. [2023-01-28 02:11:24,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:24,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 835 transitions. [2023-01-28 02:11:24,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 92.77777777777777) internal successors, (835), 9 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:24,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 324.0) internal successors, (3240), 10 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:24,362 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 324.0) internal successors, (3240), 10 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:24,362 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 225 flow. Second operand 9 states and 835 transitions. [2023-01-28 02:11:24,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 47 transitions, 371 flow [2023-01-28 02:11:24,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 362 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 02:11:24,364 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 265 flow [2023-01-28 02:11:24,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=265, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2023-01-28 02:11:24,365 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-01-28 02:11:24,365 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 265 flow [2023-01-28 02:11:24,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 89.88888888888889) internal successors, (1618), 18 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:24,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:24,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:24,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:24,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:24,573 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:24,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:24,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1100878043, now seen corresponding path program 2 times [2023-01-28 02:11:24,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:24,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805824311] [2023-01-28 02:11:24,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:24,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:24,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:24,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805824311] [2023-01-28 02:11:24,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805824311] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:24,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420727917] [2023-01-28 02:11:24,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:11:24,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:24,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:24,816 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) [2023-01-28 02:11:24,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 02:11:24,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:11:24,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:11:24,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 02:11:24,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:24,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:25,051 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 02:11:25,051 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 40 treesize of output 56 [2023-01-28 02:11:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:25,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420727917] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:11:25,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:11:25,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 10 [2023-01-28 02:11:25,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122566087] [2023-01-28 02:11:25,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:11:25,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 02:11:25,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:25,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 02:11:25,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-01-28 02:11:25,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-01-28 02:11:25,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 265 flow. Second operand has 11 states, 11 states have (on average 114.9090909090909) internal successors, (1264), 11 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:25,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:25,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-01-28 02:11:25,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:25,196 INFO L130 PetriNetUnfolder]: 141/263 cut-off events. [2023-01-28 02:11:25,196 INFO L131 PetriNetUnfolder]: For 673/673 co-relation queries the response was YES. [2023-01-28 02:11:25,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 263 events. 141/263 cut-off events. For 673/673 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 872 event pairs, 49 based on Foata normal form. 4/267 useless extension candidates. Maximal degree in co-relation 1045. Up to 230 conditions per place. [2023-01-28 02:11:25,198 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 33 selfloop transitions, 10 changer transitions 0/43 dead transitions. [2023-01-28 02:11:25,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 43 transitions, 385 flow [2023-01-28 02:11:25,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:11:25,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:11:25,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 596 transitions. [2023-01-28 02:11:25,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36790123456790125 [2023-01-28 02:11:25,199 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 596 transitions. [2023-01-28 02:11:25,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 596 transitions. [2023-01-28 02:11:25,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:25,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 596 transitions. [2023-01-28 02:11:25,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.2) internal successors, (596), 5 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:25,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:25,202 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:25,203 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 265 flow. Second operand 5 states and 596 transitions. [2023-01-28 02:11:25,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 43 transitions, 385 flow [2023-01-28 02:11:25,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 360 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-28 02:11:25,205 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 274 flow [2023-01-28 02:11:25,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2023-01-28 02:11:25,205 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2023-01-28 02:11:25,205 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 274 flow [2023-01-28 02:11:25,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 114.9090909090909) internal successors, (1264), 11 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:25,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:25,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:25,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:25,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-28 02:11:25,413 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:25,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:25,414 INFO L85 PathProgramCache]: Analyzing trace with hash 2141083410, now seen corresponding path program 4 times [2023-01-28 02:11:25,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:25,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455792335] [2023-01-28 02:11:25,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:25,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:25,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:25,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455792335] [2023-01-28 02:11:25,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455792335] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:25,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491859835] [2023-01-28 02:11:25,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:11:25,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:25,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:25,888 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) [2023-01-28 02:11:25,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 02:11:25,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:11:25,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:11:25,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 02:11:25,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:26,050 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 [2023-01-28 02:11:26,096 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 [2023-01-28 02:11:26,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:11:26,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:11:26,228 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 02:11:26,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2023-01-28 02:11:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:11:26,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:26,504 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:11:26,504 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 50 treesize of output 39 [2023-01-28 02:11:26,514 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:11:26,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 82 [2023-01-28 02:11:26,521 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:11:26,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 55 [2023-01-28 02:11:26,552 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:11:26,552 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 106 treesize of output 70 [2023-01-28 02:11:26,598 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-01-28 02:11:26,599 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 508 treesize of output 473 [2023-01-28 02:11:26,620 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:11:26,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 254 [2023-01-28 02:11:26,654 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:11:26,655 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 316 treesize of output 308 [2023-01-28 02:11:28,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:11:28,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491859835] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:11:28,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:11:28,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2023-01-28 02:11:28,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660737453] [2023-01-28 02:11:28,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:11:28,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 02:11:28,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:28,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 02:11:28,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=427, Unknown=4, NotChecked=0, Total=506 [2023-01-28 02:11:28,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 324 [2023-01-28 02:11:28,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 274 flow. Second operand has 23 states, 23 states have (on average 81.65217391304348) internal successors, (1878), 23 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:28,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:28,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 324 [2023-01-28 02:11:28,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:28,793 INFO L130 PetriNetUnfolder]: 172/329 cut-off events. [2023-01-28 02:11:28,793 INFO L131 PetriNetUnfolder]: For 819/819 co-relation queries the response was YES. [2023-01-28 02:11:28,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1323 conditions, 329 events. 172/329 cut-off events. For 819/819 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1251 event pairs, 6 based on Foata normal form. 20/349 useless extension candidates. Maximal degree in co-relation 1289. Up to 157 conditions per place. [2023-01-28 02:11:28,795 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 45 selfloop transitions, 17 changer transitions 1/63 dead transitions. [2023-01-28 02:11:28,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 515 flow [2023-01-28 02:11:28,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 02:11:28,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 02:11:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 777 transitions. [2023-01-28 02:11:28,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2664609053497942 [2023-01-28 02:11:28,798 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 777 transitions. [2023-01-28 02:11:28,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 777 transitions. [2023-01-28 02:11:28,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:28,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 777 transitions. [2023-01-28 02:11:28,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 86.33333333333333) internal successors, (777), 9 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:28,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 324.0) internal successors, (3240), 10 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:28,802 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 324.0) internal successors, (3240), 10 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:28,802 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 274 flow. Second operand 9 states and 777 transitions. [2023-01-28 02:11:28,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 515 flow [2023-01-28 02:11:28,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 63 transitions, 497 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 02:11:28,805 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 336 flow [2023-01-28 02:11:28,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=336, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-01-28 02:11:28,805 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2023-01-28 02:11:28,805 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 336 flow [2023-01-28 02:11:28,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 81.65217391304348) internal successors, (1878), 23 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:28,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:28,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:28,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-28 02:11:29,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:29,011 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:29,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:29,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1109515910, now seen corresponding path program 5 times [2023-01-28 02:11:29,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:29,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734614728] [2023-01-28 02:11:29,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:29,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:29,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:29,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734614728] [2023-01-28 02:11:29,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734614728] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:29,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645168233] [2023-01-28 02:11:29,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:11:29,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:29,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:29,374 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) [2023-01-28 02:11:29,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 02:11:29,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:11:29,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:11:29,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-28 02:11:29,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:29,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:11:29,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 02:11:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:29,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:29,767 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_~i_AB~0 4))) (let ((.cse4 (forall ((v_ArrVal_369 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_369) ~B~0.base) (+ ~B~0.offset .cse3)) |c_thread1Thread1of1ForFork1_#t~mem1|))))) (and (forall ((v_ArrVal_369 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_369))) (let ((.cse2 (select .cse0 ~B~0.base))) (or (let ((.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) (select .cse2 (+ .cse1 ~B~0.offset)))) (not (= (select .cse2 (+ ~B~0.offset .cse3)) |c_thread1Thread1of1ForFork1_#t~mem1|)))))) (or (< c_~i_BA~0 c_~Bn~0) .cse4) (or (< c_~i_BA~0 c_~An~0) .cse4)))) is different from false [2023-01-28 02:11:29,778 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:11:29,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2023-01-28 02:11:29,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-01-28 02:11:29,821 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-01-28 02:11:29,821 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 146 treesize of output 151 [2023-01-28 02:11:29,838 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:11:29,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 92 [2023-01-28 02:11:30,000 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 02:11:30,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2023-01-28 02:11:30,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:30,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645168233] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:30,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 02:11:30,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 22 [2023-01-28 02:11:30,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285670032] [2023-01-28 02:11:30,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:11:30,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 02:11:30,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:30,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 02:11:30,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=393, Unknown=1, NotChecked=40, Total=506 [2023-01-28 02:11:30,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 324 [2023-01-28 02:11:30,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 336 flow. Second operand has 9 states, 9 states have (on average 85.88888888888889) internal successors, (773), 9 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:30,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:30,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 324 [2023-01-28 02:11:30,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:34,554 INFO L130 PetriNetUnfolder]: 164/297 cut-off events. [2023-01-28 02:11:34,554 INFO L131 PetriNetUnfolder]: For 1186/1186 co-relation queries the response was YES. [2023-01-28 02:11:34,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1419 conditions, 297 events. 164/297 cut-off events. For 1186/1186 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1008 event pairs, 27 based on Foata normal form. 2/299 useless extension candidates. Maximal degree in co-relation 1381. Up to 271 conditions per place. [2023-01-28 02:11:34,556 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 30 selfloop transitions, 16 changer transitions 3/49 dead transitions. [2023-01-28 02:11:34,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 49 transitions, 476 flow [2023-01-28 02:11:34,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 02:11:34,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 02:11:34,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 879 transitions. [2023-01-28 02:11:34,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2712962962962963 [2023-01-28 02:11:34,559 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 879 transitions. [2023-01-28 02:11:34,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 879 transitions. [2023-01-28 02:11:34,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:34,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 879 transitions. [2023-01-28 02:11:34,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 87.9) internal successors, (879), 10 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:34,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:34,564 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:34,564 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 336 flow. Second operand 10 states and 879 transitions. [2023-01-28 02:11:34,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 49 transitions, 476 flow [2023-01-28 02:11:34,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 49 transitions, 432 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-01-28 02:11:34,569 INFO L231 Difference]: Finished difference. Result has 59 places, 42 transitions, 348 flow [2023-01-28 02:11:34,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=348, PETRI_PLACES=59, PETRI_TRANSITIONS=42} [2023-01-28 02:11:34,570 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 38 predicate places. [2023-01-28 02:11:34,570 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 42 transitions, 348 flow [2023-01-28 02:11:34,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 85.88888888888889) internal successors, (773), 9 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:34,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:34,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:34,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-01-28 02:11:34,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:34,778 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:34,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:34,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1778420361, now seen corresponding path program 3 times [2023-01-28 02:11:34,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:34,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493463544] [2023-01-28 02:11:34,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:34,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:34,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:34,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493463544] [2023-01-28 02:11:34,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493463544] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:34,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817251446] [2023-01-28 02:11:34,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:11:34,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:34,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:34,993 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) [2023-01-28 02:11:34,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 02:11:35,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 02:11:35,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:11:35,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 02:11:35,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:35,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:35,194 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 02:11:35,194 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 40 treesize of output 56 [2023-01-28 02:11:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:35,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817251446] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:11:35,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:11:35,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 10 [2023-01-28 02:11:35,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087288460] [2023-01-28 02:11:35,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:11:35,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 02:11:35,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:35,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 02:11:35,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-01-28 02:11:35,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-01-28 02:11:35,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 42 transitions, 348 flow. Second operand has 11 states, 11 states have (on average 114.9090909090909) internal successors, (1264), 11 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:35,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:35,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-01-28 02:11:35,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:35,337 INFO L130 PetriNetUnfolder]: 168/301 cut-off events. [2023-01-28 02:11:35,338 INFO L131 PetriNetUnfolder]: For 953/953 co-relation queries the response was YES. [2023-01-28 02:11:35,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1439 conditions, 301 events. 168/301 cut-off events. For 953/953 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1028 event pairs, 24 based on Foata normal form. 4/305 useless extension candidates. Maximal degree in co-relation 1402. Up to 225 conditions per place. [2023-01-28 02:11:35,339 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 43 selfloop transitions, 13 changer transitions 0/56 dead transitions. [2023-01-28 02:11:35,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 541 flow [2023-01-28 02:11:35,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 02:11:35,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 02:11:35,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 713 transitions. [2023-01-28 02:11:35,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36676954732510286 [2023-01-28 02:11:35,341 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 713 transitions. [2023-01-28 02:11:35,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 713 transitions. [2023-01-28 02:11:35,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:35,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 713 transitions. [2023-01-28 02:11:35,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.83333333333333) internal successors, (713), 6 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:35,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:35,357 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:35,358 INFO L175 Difference]: Start difference. First operand has 59 places, 42 transitions, 348 flow. Second operand 6 states and 713 transitions. [2023-01-28 02:11:35,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 541 flow [2023-01-28 02:11:35,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 505 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-01-28 02:11:35,361 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 352 flow [2023-01-28 02:11:35,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=352, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2023-01-28 02:11:35,362 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2023-01-28 02:11:35,362 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 352 flow [2023-01-28 02:11:35,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 114.9090909090909) internal successors, (1264), 11 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:35,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:35,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:35,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:35,568 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,SelfDestructingSolverStorable13 [2023-01-28 02:11:35,569 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:35,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:35,569 INFO L85 PathProgramCache]: Analyzing trace with hash -292123197, now seen corresponding path program 4 times [2023-01-28 02:11:35,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:35,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539505751] [2023-01-28 02:11:35,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:35,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:35,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:35,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539505751] [2023-01-28 02:11:35,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539505751] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:35,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723479187] [2023-01-28 02:11:35,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:11:35,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:35,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:35,819 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) [2023-01-28 02:11:35,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 02:11:35,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:11:35,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:11:35,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 02:11:35,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:36,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:11:36,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 02:11:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:36,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:36,116 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_446 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_446))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse1 c_~B~0.offset)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse1))))) (= (select .cse0 (+ c_~B~0.offset (* c_~i_AB~0 4))) |c_thread1Thread1of1ForFork1_#t~mem1|))))) is different from false [2023-01-28 02:11:36,148 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:11:36,148 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 148 treesize of output 168 [2023-01-28 02:11:36,166 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:11:36,166 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 84 treesize of output 86 [2023-01-28 02:11:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:36,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723479187] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:11:36,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:11:36,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 17 [2023-01-28 02:11:36,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136717746] [2023-01-28 02:11:36,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:11:36,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 02:11:36,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:36,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 02:11:36,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=220, Unknown=1, NotChecked=30, Total=306 [2023-01-28 02:11:36,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 324 [2023-01-28 02:11:36,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 352 flow. Second operand has 18 states, 18 states have (on average 110.22222222222223) internal successors, (1984), 18 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:36,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:36,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 324 [2023-01-28 02:11:36,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:36,839 INFO L130 PetriNetUnfolder]: 158/281 cut-off events. [2023-01-28 02:11:36,839 INFO L131 PetriNetUnfolder]: For 961/961 co-relation queries the response was YES. [2023-01-28 02:11:36,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1383 conditions, 281 events. 158/281 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 912 event pairs, 40 based on Foata normal form. 4/285 useless extension candidates. Maximal degree in co-relation 1347. Up to 243 conditions per place. [2023-01-28 02:11:36,841 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 38 selfloop transitions, 12 changer transitions 0/50 dead transitions. [2023-01-28 02:11:36,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 50 transitions, 492 flow [2023-01-28 02:11:36,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 02:11:36,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 02:11:36,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 682 transitions. [2023-01-28 02:11:36,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3508230452674897 [2023-01-28 02:11:36,843 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 682 transitions. [2023-01-28 02:11:36,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 682 transitions. [2023-01-28 02:11:36,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:36,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 682 transitions. [2023-01-28 02:11:36,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.66666666666667) internal successors, (682), 6 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:36,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:36,846 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:36,846 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 352 flow. Second operand 6 states and 682 transitions. [2023-01-28 02:11:36,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 50 transitions, 492 flow [2023-01-28 02:11:36,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 446 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-01-28 02:11:36,849 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 337 flow [2023-01-28 02:11:36,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2023-01-28 02:11:36,850 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2023-01-28 02:11:36,850 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 337 flow [2023-01-28 02:11:36,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 110.22222222222223) internal successors, (1984), 18 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:36,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:36,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:36,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:37,056 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,SelfDestructingSolverStorable14 [2023-01-28 02:11:37,057 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:37,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:37,057 INFO L85 PathProgramCache]: Analyzing trace with hash -705701550, now seen corresponding path program 1 times [2023-01-28 02:11:37,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:37,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024116308] [2023-01-28 02:11:37,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:37,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:37,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:37,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024116308] [2023-01-28 02:11:37,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024116308] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:37,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402356588] [2023-01-28 02:11:37,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:37,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:37,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:37,176 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) [2023-01-28 02:11:37,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 02:11:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:37,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 02:11:37,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:37,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:37,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:37,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402356588] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:11:37,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:11:37,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-01-28 02:11:37,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406015569] [2023-01-28 02:11:37,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:11:37,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 02:11:37,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:37,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 02:11:37,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-01-28 02:11:37,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 324 [2023-01-28 02:11:37,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 337 flow. Second operand has 7 states, 7 states have (on average 139.28571428571428) internal successors, (975), 7 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) [2023-01-28 02:11:37,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:37,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 324 [2023-01-28 02:11:37,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:37,491 INFO L130 PetriNetUnfolder]: 260/474 cut-off events. [2023-01-28 02:11:37,491 INFO L131 PetriNetUnfolder]: For 1455/1455 co-relation queries the response was YES. [2023-01-28 02:11:37,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2200 conditions, 474 events. 260/474 cut-off events. For 1455/1455 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1864 event pairs, 14 based on Foata normal form. 4/478 useless extension candidates. Maximal degree in co-relation 2165. Up to 224 conditions per place. [2023-01-28 02:11:37,494 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 67 selfloop transitions, 17 changer transitions 2/86 dead transitions. [2023-01-28 02:11:37,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 86 transitions, 756 flow [2023-01-28 02:11:37,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 02:11:37,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 02:11:37,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1006 transitions. [2023-01-28 02:11:37,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435626102292769 [2023-01-28 02:11:37,497 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1006 transitions. [2023-01-28 02:11:37,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1006 transitions. [2023-01-28 02:11:37,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:37,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1006 transitions. [2023-01-28 02:11:37,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 143.71428571428572) internal successors, (1006), 7 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:37,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:37,502 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:37,502 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 337 flow. Second operand 7 states and 1006 transitions. [2023-01-28 02:11:37,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 86 transitions, 756 flow [2023-01-28 02:11:37,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 727 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-01-28 02:11:37,506 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 431 flow [2023-01-28 02:11:37,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=431, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2023-01-28 02:11:37,507 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 38 predicate places. [2023-01-28 02:11:37,507 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 431 flow [2023-01-28 02:11:37,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 139.28571428571428) internal successors, (975), 7 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) [2023-01-28 02:11:37,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:37,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:37,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:37,713 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,SelfDestructingSolverStorable15 [2023-01-28 02:11:37,713 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:37,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:37,714 INFO L85 PathProgramCache]: Analyzing trace with hash -113070510, now seen corresponding path program 2 times [2023-01-28 02:11:37,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:37,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680830124] [2023-01-28 02:11:37,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:37,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:37,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:37,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680830124] [2023-01-28 02:11:37,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680830124] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:37,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723665693] [2023-01-28 02:11:37,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:11:37,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:37,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:37,821 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) [2023-01-28 02:11:37,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 02:11:37,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:11:37,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:11:37,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 02:11:37,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:38,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 02:11:38,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723665693] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:11:38,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:11:38,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-01-28 02:11:38,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121941640] [2023-01-28 02:11:38,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:11:38,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 02:11:38,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:38,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 02:11:38,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-01-28 02:11:38,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 324 [2023-01-28 02:11:38,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 431 flow. Second operand has 7 states, 7 states have (on average 139.28571428571428) internal successors, (975), 7 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) [2023-01-28 02:11:38,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:38,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 324 [2023-01-28 02:11:38,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:38,201 INFO L130 PetriNetUnfolder]: 380/690 cut-off events. [2023-01-28 02:11:38,201 INFO L131 PetriNetUnfolder]: For 2640/2640 co-relation queries the response was YES. [2023-01-28 02:11:38,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3367 conditions, 690 events. 380/690 cut-off events. For 2640/2640 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3052 event pairs, 74 based on Foata normal form. 4/694 useless extension candidates. Maximal degree in co-relation 3330. Up to 474 conditions per place. [2023-01-28 02:11:38,205 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 71 selfloop transitions, 18 changer transitions 2/91 dead transitions. [2023-01-28 02:11:38,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 91 transitions, 873 flow [2023-01-28 02:11:38,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 02:11:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 02:11:38,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1001 transitions. [2023-01-28 02:11:38,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44135802469135804 [2023-01-28 02:11:38,207 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1001 transitions. [2023-01-28 02:11:38,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1001 transitions. [2023-01-28 02:11:38,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:38,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1001 transitions. [2023-01-28 02:11:38,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 143.0) internal successors, (1001), 7 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:38,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:38,211 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:38,211 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 431 flow. Second operand 7 states and 1001 transitions. [2023-01-28 02:11:38,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 91 transitions, 873 flow [2023-01-28 02:11:38,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 91 transitions, 847 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-01-28 02:11:38,215 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 563 flow [2023-01-28 02:11:38,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=563, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-01-28 02:11:38,215 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2023-01-28 02:11:38,216 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 563 flow [2023-01-28 02:11:38,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 139.28571428571428) internal successors, (975), 7 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) [2023-01-28 02:11:38,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:38,216 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:38,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:38,420 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,SelfDestructingSolverStorable16 [2023-01-28 02:11:38,420 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:38,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:38,421 INFO L85 PathProgramCache]: Analyzing trace with hash -604771874, now seen corresponding path program 3 times [2023-01-28 02:11:38,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:38,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302115332] [2023-01-28 02:11:38,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:38,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:38,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:38,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302115332] [2023-01-28 02:11:38,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302115332] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:38,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769853519] [2023-01-28 02:11:38,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:11:38,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:38,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:38,487 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) [2023-01-28 02:11:38,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 02:11:38,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 02:11:38,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:11:38,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 02:11:38,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:38,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:38,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769853519] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:11:38,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:11:38,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-01-28 02:11:38,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676405477] [2023-01-28 02:11:38,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:11:38,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 02:11:38,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:38,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 02:11:38,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-01-28 02:11:38,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 324 [2023-01-28 02:11:38,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 563 flow. Second operand has 15 states, 15 states have (on average 114.13333333333334) internal successors, (1712), 15 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:38,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:38,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 324 [2023-01-28 02:11:38,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:39,094 INFO L130 PetriNetUnfolder]: 987/1932 cut-off events. [2023-01-28 02:11:39,095 INFO L131 PetriNetUnfolder]: For 8382/8382 co-relation queries the response was YES. [2023-01-28 02:11:39,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9691 conditions, 1932 events. 987/1932 cut-off events. For 8382/8382 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11836 event pairs, 288 based on Foata normal form. 168/2100 useless extension candidates. Maximal degree in co-relation 9269. Up to 549 conditions per place. [2023-01-28 02:11:39,106 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 164 selfloop transitions, 51 changer transitions 3/218 dead transitions. [2023-01-28 02:11:39,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 218 transitions, 2360 flow [2023-01-28 02:11:39,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 02:11:39,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 02:11:39,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1769 transitions. [2023-01-28 02:11:39,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3639917695473251 [2023-01-28 02:11:39,109 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1769 transitions. [2023-01-28 02:11:39,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1769 transitions. [2023-01-28 02:11:39,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:39,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1769 transitions. [2023-01-28 02:11:39,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 117.93333333333334) internal successors, (1769), 15 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:39,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:39,115 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:39,115 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 563 flow. Second operand 15 states and 1769 transitions. [2023-01-28 02:11:39,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 218 transitions, 2360 flow [2023-01-28 02:11:39,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 218 transitions, 2259 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-01-28 02:11:39,129 INFO L231 Difference]: Finished difference. Result has 86 places, 98 transitions, 1088 flow [2023-01-28 02:11:39,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1088, PETRI_PLACES=86, PETRI_TRANSITIONS=98} [2023-01-28 02:11:39,129 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-01-28 02:11:39,129 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 98 transitions, 1088 flow [2023-01-28 02:11:39,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 114.13333333333334) internal successors, (1712), 15 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:39,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:39,130 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:39,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:39,339 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,SelfDestructingSolverStorable17 [2023-01-28 02:11:39,339 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:39,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:39,339 INFO L85 PathProgramCache]: Analyzing trace with hash -128575453, now seen corresponding path program 4 times [2023-01-28 02:11:39,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:39,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124227729] [2023-01-28 02:11:39,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:39,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:39,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:39,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124227729] [2023-01-28 02:11:39,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124227729] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:39,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891474043] [2023-01-28 02:11:39,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:11:39,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:39,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:39,416 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) [2023-01-28 02:11:39,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 02:11:39,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:11:39,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:11:39,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 02:11:39,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:39,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:11:39,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891474043] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:11:39,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:11:39,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-01-28 02:11:39,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301749036] [2023-01-28 02:11:39,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:11:39,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 02:11:39,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:39,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 02:11:39,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-01-28 02:11:39,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-01-28 02:11:39,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 98 transitions, 1088 flow. Second operand has 13 states, 13 states have (on average 117.07692307692308) internal successors, (1522), 13 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:39,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:39,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-01-28 02:11:39,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:39,821 INFO L130 PetriNetUnfolder]: 705/1378 cut-off events. [2023-01-28 02:11:39,821 INFO L131 PetriNetUnfolder]: For 6998/6998 co-relation queries the response was YES. [2023-01-28 02:11:39,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7255 conditions, 1378 events. 705/1378 cut-off events. For 6998/6998 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7663 event pairs, 396 based on Foata normal form. 30/1408 useless extension candidates. Maximal degree in co-relation 6890. Up to 1103 conditions per place. [2023-01-28 02:11:39,829 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 71 selfloop transitions, 3 changer transitions 42/116 dead transitions. [2023-01-28 02:11:39,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 116 transitions, 1432 flow [2023-01-28 02:11:39,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 02:11:39,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 02:11:39,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 726 transitions. [2023-01-28 02:11:39,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3734567901234568 [2023-01-28 02:11:39,831 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 726 transitions. [2023-01-28 02:11:39,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 726 transitions. [2023-01-28 02:11:39,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:39,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 726 transitions. [2023-01-28 02:11:39,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 121.0) internal successors, (726), 6 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:39,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:39,835 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:39,835 INFO L175 Difference]: Start difference. First operand has 86 places, 98 transitions, 1088 flow. Second operand 6 states and 726 transitions. [2023-01-28 02:11:39,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 116 transitions, 1432 flow [2023-01-28 02:11:39,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 116 transitions, 1393 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-01-28 02:11:39,849 INFO L231 Difference]: Finished difference. Result has 90 places, 74 transitions, 746 flow [2023-01-28 02:11:39,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=746, PETRI_PLACES=90, PETRI_TRANSITIONS=74} [2023-01-28 02:11:39,849 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 69 predicate places. [2023-01-28 02:11:39,849 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 74 transitions, 746 flow [2023-01-28 02:11:39,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 117.07692307692308) internal successors, (1522), 13 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:39,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:39,850 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:39,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:40,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:40,056 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:40,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:40,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2055837313, now seen corresponding path program 5 times [2023-01-28 02:11:40,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:40,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609973164] [2023-01-28 02:11:40,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:40,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 02:11:40,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:40,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609973164] [2023-01-28 02:11:40,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609973164] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:40,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217727393] [2023-01-28 02:11:40,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:11:40,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:40,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:40,232 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) [2023-01-28 02:11:40,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 02:11:40,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:11:40,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:11:40,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 02:11:40,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:11:40,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:11:40,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217727393] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:11:40,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:11:40,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 16 [2023-01-28 02:11:40,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633473896] [2023-01-28 02:11:40,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:11:40,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 02:11:40,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:40,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 02:11:40,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-01-28 02:11:40,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 324 [2023-01-28 02:11:40,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 74 transitions, 746 flow. Second operand has 17 states, 17 states have (on average 108.82352941176471) internal successors, (1850), 17 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:40,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:40,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 324 [2023-01-28 02:11:40,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:41,140 INFO L130 PetriNetUnfolder]: 675/1291 cut-off events. [2023-01-28 02:11:41,140 INFO L131 PetriNetUnfolder]: For 6858/6858 co-relation queries the response was YES. [2023-01-28 02:11:41,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6764 conditions, 1291 events. 675/1291 cut-off events. For 6858/6858 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6996 event pairs, 40 based on Foata normal form. 43/1334 useless extension candidates. Maximal degree in co-relation 6716. Up to 351 conditions per place. [2023-01-28 02:11:41,148 INFO L137 encePairwiseOnDemand]: 316/324 looper letters, 128 selfloop transitions, 60 changer transitions 22/210 dead transitions. [2023-01-28 02:11:41,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 210 transitions, 2209 flow [2023-01-28 02:11:41,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 02:11:41,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 02:11:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2477 transitions. [2023-01-28 02:11:41,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3475028058361392 [2023-01-28 02:11:41,151 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2477 transitions. [2023-01-28 02:11:41,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2477 transitions. [2023-01-28 02:11:41,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:41,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2477 transitions. [2023-01-28 02:11:41,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 112.5909090909091) internal successors, (2477), 22 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:41,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:41,159 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:41,159 INFO L175 Difference]: Start difference. First operand has 90 places, 74 transitions, 746 flow. Second operand 22 states and 2477 transitions. [2023-01-28 02:11:41,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 210 transitions, 2209 flow [2023-01-28 02:11:41,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 210 transitions, 2107 flow, removed 48 selfloop flow, removed 8 redundant places. [2023-01-28 02:11:41,172 INFO L231 Difference]: Finished difference. Result has 101 places, 106 transitions, 1201 flow [2023-01-28 02:11:41,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1201, PETRI_PLACES=101, PETRI_TRANSITIONS=106} [2023-01-28 02:11:41,172 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 80 predicate places. [2023-01-28 02:11:41,172 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 106 transitions, 1201 flow [2023-01-28 02:11:41,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 108.82352941176471) internal successors, (1850), 17 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:41,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:41,173 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:41,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:41,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:41,378 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:41,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:41,378 INFO L85 PathProgramCache]: Analyzing trace with hash -7138628, now seen corresponding path program 6 times [2023-01-28 02:11:41,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:41,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151380595] [2023-01-28 02:11:41,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:41,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 02:11:41,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:41,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151380595] [2023-01-28 02:11:41,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151380595] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:41,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137534904] [2023-01-28 02:11:41,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:11:41,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:41,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:41,469 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) [2023-01-28 02:11:41,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 02:11:41,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 02:11:41,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:11:41,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 02:11:41,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 02:11:41,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 02:11:41,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137534904] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:11:41,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:11:41,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-01-28 02:11:41,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821031616] [2023-01-28 02:11:41,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:11:41,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 02:11:41,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:41,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 02:11:41,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-01-28 02:11:41,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-01-28 02:11:41,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 106 transitions, 1201 flow. Second operand has 15 states, 15 states have (on average 116.73333333333333) internal successors, (1751), 15 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:41,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:41,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-01-28 02:11:41,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:41,862 INFO L130 PetriNetUnfolder]: 503/945 cut-off events. [2023-01-28 02:11:41,863 INFO L131 PetriNetUnfolder]: For 6496/6496 co-relation queries the response was YES. [2023-01-28 02:11:41,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5523 conditions, 945 events. 503/945 cut-off events. For 6496/6496 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4502 event pairs, 142 based on Foata normal form. 15/960 useless extension candidates. Maximal degree in co-relation 5470. Up to 777 conditions per place. [2023-01-28 02:11:41,868 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 76 selfloop transitions, 13 changer transitions 27/116 dead transitions. [2023-01-28 02:11:41,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 116 transitions, 1473 flow [2023-01-28 02:11:41,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 02:11:41,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 02:11:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 955 transitions. [2023-01-28 02:11:41,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36844135802469136 [2023-01-28 02:11:41,870 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 955 transitions. [2023-01-28 02:11:41,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 955 transitions. [2023-01-28 02:11:41,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:41,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 955 transitions. [2023-01-28 02:11:41,871 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) [2023-01-28 02:11:41,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:41,873 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:41,873 INFO L175 Difference]: Start difference. First operand has 101 places, 106 transitions, 1201 flow. Second operand 8 states and 955 transitions. [2023-01-28 02:11:41,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 116 transitions, 1473 flow [2023-01-28 02:11:41,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 116 transitions, 1405 flow, removed 22 selfloop flow, removed 5 redundant places. [2023-01-28 02:11:41,887 INFO L231 Difference]: Finished difference. Result has 100 places, 85 transitions, 861 flow [2023-01-28 02:11:41,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=861, PETRI_PLACES=100, PETRI_TRANSITIONS=85} [2023-01-28 02:11:41,888 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 79 predicate places. [2023-01-28 02:11:41,888 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 85 transitions, 861 flow [2023-01-28 02:11:41,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 116.73333333333333) internal successors, (1751), 15 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:41,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:41,888 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:41,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:42,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:42,094 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:42,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:42,094 INFO L85 PathProgramCache]: Analyzing trace with hash 943532550, now seen corresponding path program 7 times [2023-01-28 02:11:42,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:42,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050975258] [2023-01-28 02:11:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:42,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:42,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:42,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050975258] [2023-01-28 02:11:42,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050975258] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:42,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335171588] [2023-01-28 02:11:42,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 02:11:42,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:42,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:42,673 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) [2023-01-28 02:11:42,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 02:11:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:42,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 02:11:42,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:43,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:43,238 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 02:11:43,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 02:11:43,272 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-28 02:11:43,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-28 02:11:43,288 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 02:11:43,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 02:11:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:43,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335171588] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:11:43,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:11:43,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-01-28 02:11:43,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331791895] [2023-01-28 02:11:43,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:11:43,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 02:11:43,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:43,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 02:11:43,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2023-01-28 02:11:43,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-28 02:11:43,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 85 transitions, 861 flow. Second operand has 32 states, 32 states have (on average 89.875) internal successors, (2876), 32 states have internal predecessors, (2876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:43,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:43,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-28 02:11:43,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:44,085 INFO L130 PetriNetUnfolder]: 510/938 cut-off events. [2023-01-28 02:11:44,086 INFO L131 PetriNetUnfolder]: For 6783/6783 co-relation queries the response was YES. [2023-01-28 02:11:44,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5317 conditions, 938 events. 510/938 cut-off events. For 6783/6783 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4511 event pairs, 113 based on Foata normal form. 12/950 useless extension candidates. Maximal degree in co-relation 5266. Up to 770 conditions per place. [2023-01-28 02:11:44,093 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 90 selfloop transitions, 29 changer transitions 0/119 dead transitions. [2023-01-28 02:11:44,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 119 transitions, 1352 flow [2023-01-28 02:11:44,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 02:11:44,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 02:11:44,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1206 transitions. [2023-01-28 02:11:44,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2863247863247863 [2023-01-28 02:11:44,094 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1206 transitions. [2023-01-28 02:11:44,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1206 transitions. [2023-01-28 02:11:44,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:44,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1206 transitions. [2023-01-28 02:11:44,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 92.76923076923077) internal successors, (1206), 13 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:44,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:44,099 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:44,099 INFO L175 Difference]: Start difference. First operand has 100 places, 85 transitions, 861 flow. Second operand 13 states and 1206 transitions. [2023-01-28 02:11:44,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 119 transitions, 1352 flow [2023-01-28 02:11:44,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 119 transitions, 1298 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-01-28 02:11:44,114 INFO L231 Difference]: Finished difference. Result has 102 places, 95 transitions, 1021 flow [2023-01-28 02:11:44,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1021, PETRI_PLACES=102, PETRI_TRANSITIONS=95} [2023-01-28 02:11:44,114 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 81 predicate places. [2023-01-28 02:11:44,114 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 95 transitions, 1021 flow [2023-01-28 02:11:44,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 89.875) internal successors, (2876), 32 states have internal predecessors, (2876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:44,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:44,115 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:44,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:44,328 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,SelfDestructingSolverStorable21 [2023-01-28 02:11:44,329 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:44,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:44,329 INFO L85 PathProgramCache]: Analyzing trace with hash -2133215393, now seen corresponding path program 1 times [2023-01-28 02:11:44,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:44,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284767237] [2023-01-28 02:11:44,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:44,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:11:44,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:44,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284767237] [2023-01-28 02:11:44,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284767237] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:44,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579379266] [2023-01-28 02:11:44,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:44,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:44,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:44,622 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) [2023-01-28 02:11:44,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 02:11:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:44,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-28 02:11:44,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:11:44,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:44,920 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-28 02:11:44,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-28 02:11:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:11:44,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579379266] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:11:44,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:11:44,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 18 [2023-01-28 02:11:44,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032320246] [2023-01-28 02:11:44,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:11:44,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 02:11:44,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:44,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 02:11:44,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-01-28 02:11:44,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-01-28 02:11:44,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 95 transitions, 1021 flow. Second operand has 19 states, 19 states have (on average 114.63157894736842) internal successors, (2178), 19 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:44,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:44,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-01-28 02:11:44,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:45,294 INFO L130 PetriNetUnfolder]: 517/968 cut-off events. [2023-01-28 02:11:45,294 INFO L131 PetriNetUnfolder]: For 8043/8043 co-relation queries the response was YES. [2023-01-28 02:11:45,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5852 conditions, 968 events. 517/968 cut-off events. For 8043/8043 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4787 event pairs, 119 based on Foata normal form. 8/976 useless extension candidates. Maximal degree in co-relation 5797. Up to 722 conditions per place. [2023-01-28 02:11:45,300 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 101 selfloop transitions, 28 changer transitions 19/148 dead transitions. [2023-01-28 02:11:45,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 148 transitions, 1654 flow [2023-01-28 02:11:45,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 02:11:45,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 02:11:45,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1433 transitions. [2023-01-28 02:11:45,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36856995884773663 [2023-01-28 02:11:45,302 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1433 transitions. [2023-01-28 02:11:45,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1433 transitions. [2023-01-28 02:11:45,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:45,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1433 transitions. [2023-01-28 02:11:45,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 119.41666666666667) internal successors, (1433), 12 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:45,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 324.0) internal successors, (4212), 13 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:45,306 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 324.0) internal successors, (4212), 13 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:45,306 INFO L175 Difference]: Start difference. First operand has 102 places, 95 transitions, 1021 flow. Second operand 12 states and 1433 transitions. [2023-01-28 02:11:45,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 148 transitions, 1654 flow [2023-01-28 02:11:45,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 148 transitions, 1577 flow, removed 16 selfloop flow, removed 9 redundant places. [2023-01-28 02:11:45,322 INFO L231 Difference]: Finished difference. Result has 107 places, 98 transitions, 1048 flow [2023-01-28 02:11:45,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1048, PETRI_PLACES=107, PETRI_TRANSITIONS=98} [2023-01-28 02:11:45,323 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 86 predicate places. [2023-01-28 02:11:45,323 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 98 transitions, 1048 flow [2023-01-28 02:11:45,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 114.63157894736842) internal successors, (2178), 19 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:45,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:45,323 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:45,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:45,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:45,529 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:45,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:45,529 INFO L85 PathProgramCache]: Analyzing trace with hash -88608933, now seen corresponding path program 2 times [2023-01-28 02:11:45,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:45,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873386573] [2023-01-28 02:11:45,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:45,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:11:45,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:45,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873386573] [2023-01-28 02:11:45,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873386573] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:45,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212168755] [2023-01-28 02:11:45,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:11:45,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:45,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:45,789 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) [2023-01-28 02:11:45,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 02:11:45,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:11:45,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:11:45,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-28 02:11:45,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:11:46,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:46,139 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-28 02:11:46,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-28 02:11:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:11:46,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212168755] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:11:46,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:11:46,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 19 [2023-01-28 02:11:46,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44997642] [2023-01-28 02:11:46,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:11:46,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 02:11:46,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:46,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 02:11:46,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-01-28 02:11:46,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-01-28 02:11:46,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 98 transitions, 1048 flow. Second operand has 20 states, 20 states have (on average 114.4) internal successors, (2288), 20 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:46,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:46,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-01-28 02:11:46,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:47,146 INFO L130 PetriNetUnfolder]: 539/992 cut-off events. [2023-01-28 02:11:47,146 INFO L131 PetriNetUnfolder]: For 8718/8718 co-relation queries the response was YES. [2023-01-28 02:11:47,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6069 conditions, 992 events. 539/992 cut-off events. For 8718/8718 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4865 event pairs, 109 based on Foata normal form. 12/1004 useless extension candidates. Maximal degree in co-relation 6013. Up to 716 conditions per place. [2023-01-28 02:11:47,153 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 102 selfloop transitions, 43 changer transitions 2/147 dead transitions. [2023-01-28 02:11:47,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 147 transitions, 1768 flow [2023-01-28 02:11:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 02:11:47,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 02:11:47,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1545 transitions. [2023-01-28 02:11:47,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3668091168091168 [2023-01-28 02:11:47,155 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1545 transitions. [2023-01-28 02:11:47,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1545 transitions. [2023-01-28 02:11:47,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:47,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1545 transitions. [2023-01-28 02:11:47,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 118.84615384615384) internal successors, (1545), 13 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:47,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:47,160 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:47,160 INFO L175 Difference]: Start difference. First operand has 107 places, 98 transitions, 1048 flow. Second operand 13 states and 1545 transitions. [2023-01-28 02:11:47,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 147 transitions, 1768 flow [2023-01-28 02:11:47,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 147 transitions, 1705 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-01-28 02:11:47,176 INFO L231 Difference]: Finished difference. Result has 117 places, 110 transitions, 1262 flow [2023-01-28 02:11:47,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1262, PETRI_PLACES=117, PETRI_TRANSITIONS=110} [2023-01-28 02:11:47,177 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 96 predicate places. [2023-01-28 02:11:47,177 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 110 transitions, 1262 flow [2023-01-28 02:11:47,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 114.4) internal successors, (2288), 20 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:47,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:47,177 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:47,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:47,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:47,383 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:47,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:47,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1583523661, now seen corresponding path program 3 times [2023-01-28 02:11:47,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:47,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460937006] [2023-01-28 02:11:47,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:47,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:11:47,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:47,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460937006] [2023-01-28 02:11:47,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460937006] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:47,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646795382] [2023-01-28 02:11:47,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:11:47,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:47,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:47,725 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) [2023-01-28 02:11:47,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 02:11:47,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 02:11:47,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:11:47,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 02:11:47,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:47,937 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 [2023-01-28 02:11:47,969 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 [2023-01-28 02:11:48,003 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 [2023-01-28 02:11:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 02:11:48,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:48,242 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:11:48,243 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 116 treesize of output 80 [2023-01-28 02:11:48,281 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 02:11:48,281 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 1804 treesize of output 1564 [2023-01-28 02:11:48,314 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:11:48,315 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:11:48,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:11:48,332 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 748 treesize of output 572 [2023-01-28 02:11:48,346 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:11:48,347 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:11:48,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:11:48,363 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 524 treesize of output 460 [2023-01-28 02:11:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 02:11:49,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646795382] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:11:49,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:11:49,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 23 [2023-01-28 02:11:49,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296056684] [2023-01-28 02:11:49,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:11:49,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 02:11:49,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:49,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 02:11:49,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=429, Unknown=8, NotChecked=0, Total=552 [2023-01-28 02:11:49,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 324 [2023-01-28 02:11:49,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 110 transitions, 1262 flow. Second operand has 24 states, 24 states have (on average 93.95833333333333) internal successors, (2255), 24 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:49,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:49,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 324 [2023-01-28 02:11:49,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:50,347 INFO L130 PetriNetUnfolder]: 585/1101 cut-off events. [2023-01-28 02:11:50,347 INFO L131 PetriNetUnfolder]: For 11783/11783 co-relation queries the response was YES. [2023-01-28 02:11:50,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7084 conditions, 1101 events. 585/1101 cut-off events. For 11783/11783 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5662 event pairs, 127 based on Foata normal form. 12/1113 useless extension candidates. Maximal degree in co-relation 7023. Up to 832 conditions per place. [2023-01-28 02:11:50,355 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 112 selfloop transitions, 43 changer transitions 23/178 dead transitions. [2023-01-28 02:11:50,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 178 transitions, 2142 flow [2023-01-28 02:11:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 02:11:50,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 02:11:50,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1866 transitions. [2023-01-28 02:11:50,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3031189083820663 [2023-01-28 02:11:50,357 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1866 transitions. [2023-01-28 02:11:50,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1866 transitions. [2023-01-28 02:11:50,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:50,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1866 transitions. [2023-01-28 02:11:50,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 98.21052631578948) internal successors, (1866), 19 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:50,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 324.0) internal successors, (6480), 20 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:50,365 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 324.0) internal successors, (6480), 20 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:50,365 INFO L175 Difference]: Start difference. First operand has 117 places, 110 transitions, 1262 flow. Second operand 19 states and 1866 transitions. [2023-01-28 02:11:50,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 178 transitions, 2142 flow [2023-01-28 02:11:50,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 178 transitions, 2048 flow, removed 24 selfloop flow, removed 6 redundant places. [2023-01-28 02:11:50,387 INFO L231 Difference]: Finished difference. Result has 135 places, 116 transitions, 1412 flow [2023-01-28 02:11:50,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1412, PETRI_PLACES=135, PETRI_TRANSITIONS=116} [2023-01-28 02:11:50,388 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 114 predicate places. [2023-01-28 02:11:50,388 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 116 transitions, 1412 flow [2023-01-28 02:11:50,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 93.95833333333333) internal successors, (2255), 24 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:50,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:50,388 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:50,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:50,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:50,594 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:50,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:50,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1313030174, now seen corresponding path program 8 times [2023-01-28 02:11:50,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:50,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408958113] [2023-01-28 02:11:50,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:50,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:51,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:51,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408958113] [2023-01-28 02:11:51,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408958113] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:51,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008468372] [2023-01-28 02:11:51,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:11:51,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:51,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:51,039 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) [2023-01-28 02:11:51,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 02:11:51,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:11:51,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:11:51,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-01-28 02:11:51,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:51,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:51,645 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 02:11:51,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 02:11:51,679 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-28 02:11:51,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-28 02:11:51,694 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 02:11:51,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 02:11:51,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:51,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008468372] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:11:51,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:11:51,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-01-28 02:11:51,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351532153] [2023-01-28 02:11:51,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:11:51,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 02:11:51,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:51,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 02:11:51,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 02:11:51,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-28 02:11:51,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 116 transitions, 1412 flow. Second operand has 33 states, 33 states have (on average 89.6969696969697) internal successors, (2960), 33 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:51,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:51,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-28 02:11:51,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:52,470 INFO L130 PetriNetUnfolder]: 565/1054 cut-off events. [2023-01-28 02:11:52,470 INFO L131 PetriNetUnfolder]: For 11383/11383 co-relation queries the response was YES. [2023-01-28 02:11:52,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6927 conditions, 1054 events. 565/1054 cut-off events. For 11383/11383 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5266 event pairs, 147 based on Foata normal form. 2/1056 useless extension candidates. Maximal degree in co-relation 6857. Up to 973 conditions per place. [2023-01-28 02:11:52,477 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 100 selfloop transitions, 27 changer transitions 2/129 dead transitions. [2023-01-28 02:11:52,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 129 transitions, 1750 flow [2023-01-28 02:11:52,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 02:11:52,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 02:11:52,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1287 transitions. [2023-01-28 02:11:52,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2837301587301587 [2023-01-28 02:11:52,491 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1287 transitions. [2023-01-28 02:11:52,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1287 transitions. [2023-01-28 02:11:52,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:52,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1287 transitions. [2023-01-28 02:11:52,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 91.92857142857143) internal successors, (1287), 14 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:52,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:52,495 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:52,495 INFO L175 Difference]: Start difference. First operand has 135 places, 116 transitions, 1412 flow. Second operand 14 states and 1287 transitions. [2023-01-28 02:11:52,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 129 transitions, 1750 flow [2023-01-28 02:11:52,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 129 transitions, 1679 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-01-28 02:11:52,517 INFO L231 Difference]: Finished difference. Result has 135 places, 116 transitions, 1401 flow [2023-01-28 02:11:52,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1401, PETRI_PLACES=135, PETRI_TRANSITIONS=116} [2023-01-28 02:11:52,518 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 114 predicate places. [2023-01-28 02:11:52,518 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 116 transitions, 1401 flow [2023-01-28 02:11:52,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 89.6969696969697) internal successors, (2960), 33 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:52,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:52,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:52,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:52,722 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,SelfDestructingSolverStorable25 [2023-01-28 02:11:52,722 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:52,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:52,723 INFO L85 PathProgramCache]: Analyzing trace with hash 456534228, now seen corresponding path program 9 times [2023-01-28 02:11:52,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:52,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118922420] [2023-01-28 02:11:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:52,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:53,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:53,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118922420] [2023-01-28 02:11:53,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118922420] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:53,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430744237] [2023-01-28 02:11:53,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:11:53,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:53,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:53,158 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) [2023-01-28 02:11:53,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 02:11:53,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 02:11:53,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:11:53,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 02:11:53,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:53,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:53,801 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-28 02:11:53,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-28 02:11:53,820 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 02:11:53,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 02:11:53,827 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 02:11:53,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 02:11:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:54,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430744237] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:11:54,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:11:54,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2023-01-28 02:11:54,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066565647] [2023-01-28 02:11:54,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:11:54,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 02:11:54,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:54,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 02:11:54,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2023-01-28 02:11:54,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-28 02:11:54,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 116 transitions, 1401 flow. Second operand has 28 states, 28 states have (on average 89.60714285714286) internal successors, (2509), 28 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:54,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:54,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-28 02:11:54,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:54,711 INFO L130 PetriNetUnfolder]: 588/1099 cut-off events. [2023-01-28 02:11:54,712 INFO L131 PetriNetUnfolder]: For 13894/13894 co-relation queries the response was YES. [2023-01-28 02:11:54,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7380 conditions, 1099 events. 588/1099 cut-off events. For 13894/13894 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5570 event pairs, 139 based on Foata normal form. 24/1123 useless extension candidates. Maximal degree in co-relation 7310. Up to 955 conditions per place. [2023-01-28 02:11:54,720 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 116 selfloop transitions, 37 changer transitions 5/158 dead transitions. [2023-01-28 02:11:54,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 158 transitions, 2061 flow [2023-01-28 02:11:54,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 02:11:54,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 02:11:54,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1577 transitions. [2023-01-28 02:11:54,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2863108206245461 [2023-01-28 02:11:54,722 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1577 transitions. [2023-01-28 02:11:54,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1577 transitions. [2023-01-28 02:11:54,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:54,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1577 transitions. [2023-01-28 02:11:54,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 92.76470588235294) internal successors, (1577), 17 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:54,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:54,729 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:54,729 INFO L175 Difference]: Start difference. First operand has 135 places, 116 transitions, 1401 flow. Second operand 17 states and 1577 transitions. [2023-01-28 02:11:54,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 158 transitions, 2061 flow [2023-01-28 02:11:54,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 158 transitions, 1997 flow, removed 2 selfloop flow, removed 12 redundant places. [2023-01-28 02:11:54,785 INFO L231 Difference]: Finished difference. Result has 139 places, 121 transitions, 1509 flow [2023-01-28 02:11:54,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1509, PETRI_PLACES=139, PETRI_TRANSITIONS=121} [2023-01-28 02:11:54,786 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 118 predicate places. [2023-01-28 02:11:54,786 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 121 transitions, 1509 flow [2023-01-28 02:11:54,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 89.60714285714286) internal successors, (2509), 28 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:54,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:54,786 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:54,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:54,993 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,SelfDestructingSolverStorable26 [2023-01-28 02:11:54,993 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:54,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:54,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1392949847, now seen corresponding path program 4 times [2023-01-28 02:11:54,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:54,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752180093] [2023-01-28 02:11:54,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:54,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:11:55,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:55,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752180093] [2023-01-28 02:11:55,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752180093] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:55,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283889113] [2023-01-28 02:11:55,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:11:55,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:55,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:55,251 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) [2023-01-28 02:11:55,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 02:11:55,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:11:55,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:11:55,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 02:11:55,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:11:55,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:55,536 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 02:11:55,537 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 40 treesize of output 56 [2023-01-28 02:11:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:11:55,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283889113] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:11:55,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:11:55,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 17 [2023-01-28 02:11:55,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549205200] [2023-01-28 02:11:55,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:11:55,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 02:11:55,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:55,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 02:11:55,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-01-28 02:11:55,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-01-28 02:11:55,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 121 transitions, 1509 flow. Second operand has 18 states, 18 states have (on average 114.77777777777777) internal successors, (2066), 18 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:55,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:55,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-01-28 02:11:55,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:56,128 INFO L130 PetriNetUnfolder]: 632/1178 cut-off events. [2023-01-28 02:11:56,128 INFO L131 PetriNetUnfolder]: For 17245/17245 co-relation queries the response was YES. [2023-01-28 02:11:56,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8310 conditions, 1178 events. 632/1178 cut-off events. For 17245/17245 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6085 event pairs, 94 based on Foata normal form. 8/1186 useless extension candidates. Maximal degree in co-relation 8239. Up to 704 conditions per place. [2023-01-28 02:11:56,137 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 125 selfloop transitions, 52 changer transitions 3/180 dead transitions. [2023-01-28 02:11:56,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 180 transitions, 2468 flow [2023-01-28 02:11:56,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 02:11:56,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 02:11:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1671 transitions. [2023-01-28 02:11:56,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3683862433862434 [2023-01-28 02:11:56,156 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1671 transitions. [2023-01-28 02:11:56,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1671 transitions. [2023-01-28 02:11:56,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:56,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1671 transitions. [2023-01-28 02:11:56,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 119.35714285714286) internal successors, (1671), 14 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:56,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:56,165 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:56,165 INFO L175 Difference]: Start difference. First operand has 139 places, 121 transitions, 1509 flow. Second operand 14 states and 1671 transitions. [2023-01-28 02:11:56,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 180 transitions, 2468 flow [2023-01-28 02:11:56,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 180 transitions, 2372 flow, removed 12 selfloop flow, removed 13 redundant places. [2023-01-28 02:11:56,197 INFO L231 Difference]: Finished difference. Result has 143 places, 126 transitions, 1612 flow [2023-01-28 02:11:56,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1612, PETRI_PLACES=143, PETRI_TRANSITIONS=126} [2023-01-28 02:11:56,201 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 122 predicate places. [2023-01-28 02:11:56,201 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 126 transitions, 1612 flow [2023-01-28 02:11:56,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 114.77777777777777) internal successors, (2066), 18 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:56,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:56,201 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:56,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:56,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-28 02:11:56,407 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:56,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:56,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1043539718, now seen corresponding path program 10 times [2023-01-28 02:11:56,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:56,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513631469] [2023-01-28 02:11:56,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:56,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:56,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:56,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513631469] [2023-01-28 02:11:56,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513631469] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:56,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30639149] [2023-01-28 02:11:56,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:11:56,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:56,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:56,815 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) [2023-01-28 02:11:56,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 02:11:56,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:11:56,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:11:56,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 02:11:56,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:11:57,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:57,196 INFO L321 Elim1Store]: treesize reduction 24, result has 68.8 percent of original size [2023-01-28 02:11:57,197 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 47 treesize of output 67 [2023-01-28 02:11:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:11:57,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30639149] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:11:57,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:11:57,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-01-28 02:11:57,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113286788] [2023-01-28 02:11:57,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:11:57,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 02:11:57,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:57,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 02:11:57,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-01-28 02:11:57,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-28 02:11:57,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 126 transitions, 1612 flow. Second operand has 24 states, 24 states have (on average 90.16666666666667) internal successors, (2164), 24 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:57,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:57,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-28 02:11:57,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:11:57,981 INFO L130 PetriNetUnfolder]: 641/1206 cut-off events. [2023-01-28 02:11:57,981 INFO L131 PetriNetUnfolder]: For 18735/18735 co-relation queries the response was YES. [2023-01-28 02:11:57,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8653 conditions, 1206 events. 641/1206 cut-off events. For 18735/18735 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6332 event pairs, 114 based on Foata normal form. 4/1210 useless extension candidates. Maximal degree in co-relation 8579. Up to 769 conditions per place. [2023-01-28 02:11:57,991 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 121 selfloop transitions, 52 changer transitions 16/189 dead transitions. [2023-01-28 02:11:57,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 189 transitions, 2534 flow [2023-01-28 02:11:57,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 02:11:57,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 02:11:57,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1686 transitions. [2023-01-28 02:11:57,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2890946502057613 [2023-01-28 02:11:57,998 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1686 transitions. [2023-01-28 02:11:57,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1686 transitions. [2023-01-28 02:11:57,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:11:57,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1686 transitions. [2023-01-28 02:11:58,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 93.66666666666667) internal successors, (1686), 18 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:58,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:58,003 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:58,003 INFO L175 Difference]: Start difference. First operand has 143 places, 126 transitions, 1612 flow. Second operand 18 states and 1686 transitions. [2023-01-28 02:11:58,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 189 transitions, 2534 flow [2023-01-28 02:11:58,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 189 transitions, 2447 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-01-28 02:11:58,037 INFO L231 Difference]: Finished difference. Result has 158 places, 134 transitions, 1805 flow [2023-01-28 02:11:58,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1805, PETRI_PLACES=158, PETRI_TRANSITIONS=134} [2023-01-28 02:11:58,038 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 137 predicate places. [2023-01-28 02:11:58,038 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 134 transitions, 1805 flow [2023-01-28 02:11:58,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 90.16666666666667) internal successors, (2164), 24 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:58,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:11:58,039 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:11:58,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-28 02:11:58,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:58,245 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:11:58,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:11:58,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2045874430, now seen corresponding path program 11 times [2023-01-28 02:11:58,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:11:58,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843973103] [2023-01-28 02:11:58,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:11:58,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:11:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:11:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:11:58,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:11:58,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843973103] [2023-01-28 02:11:58,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843973103] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:11:58,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457296494] [2023-01-28 02:11:58,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:11:58,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:11:58,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:11:58,648 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) [2023-01-28 02:11:58,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 02:11:58,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 02:11:58,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:11:58,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-28 02:11:58,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:11:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:11:58,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:11:59,087 INFO L321 Elim1Store]: treesize reduction 35, result has 80.9 percent of original size [2023-01-28 02:11:59,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 173 [2023-01-28 02:11:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 02:11:59,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457296494] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:11:59,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:11:59,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-01-28 02:11:59,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058981904] [2023-01-28 02:11:59,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:11:59,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 02:11:59,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:11:59,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 02:11:59,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-01-28 02:11:59,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-28 02:11:59,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 134 transitions, 1805 flow. Second operand has 24 states, 24 states have (on average 90.16666666666667) internal successors, (2164), 24 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:11:59,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:11:59,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-28 02:11:59,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:12:00,038 INFO L130 PetriNetUnfolder]: 637/1193 cut-off events. [2023-01-28 02:12:00,039 INFO L131 PetriNetUnfolder]: For 21843/21843 co-relation queries the response was YES. [2023-01-28 02:12:00,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9097 conditions, 1193 events. 637/1193 cut-off events. For 21843/21843 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6229 event pairs, 152 based on Foata normal form. 4/1197 useless extension candidates. Maximal degree in co-relation 9015. Up to 914 conditions per place. [2023-01-28 02:12:00,047 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 109 selfloop transitions, 50 changer transitions 7/166 dead transitions. [2023-01-28 02:12:00,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 166 transitions, 2387 flow [2023-01-28 02:12:00,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 02:12:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 02:12:00,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1582 transitions. [2023-01-28 02:12:00,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28721859114015974 [2023-01-28 02:12:00,049 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1582 transitions. [2023-01-28 02:12:00,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1582 transitions. [2023-01-28 02:12:00,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:12:00,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1582 transitions. [2023-01-28 02:12:00,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 93.05882352941177) internal successors, (1582), 17 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:00,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:00,054 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:00,054 INFO L175 Difference]: Start difference. First operand has 158 places, 134 transitions, 1805 flow. Second operand 17 states and 1582 transitions. [2023-01-28 02:12:00,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 166 transitions, 2387 flow [2023-01-28 02:12:00,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 166 transitions, 2253 flow, removed 45 selfloop flow, removed 9 redundant places. [2023-01-28 02:12:00,093 INFO L231 Difference]: Finished difference. Result has 166 places, 136 transitions, 1843 flow [2023-01-28 02:12:00,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1843, PETRI_PLACES=166, PETRI_TRANSITIONS=136} [2023-01-28 02:12:00,094 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 145 predicate places. [2023-01-28 02:12:00,094 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 136 transitions, 1843 flow [2023-01-28 02:12:00,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 90.16666666666667) internal successors, (2164), 24 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:00,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:12:00,094 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:12:00,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-28 02:12:00,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:12:00,299 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:12:00,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:12:00,300 INFO L85 PathProgramCache]: Analyzing trace with hash -962381630, now seen corresponding path program 12 times [2023-01-28 02:12:00,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:12:00,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560404976] [2023-01-28 02:12:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:12:00,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:12:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:12:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:12:00,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:12:00,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560404976] [2023-01-28 02:12:00,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560404976] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:12:00,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651805107] [2023-01-28 02:12:00,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:12:00,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:12:00,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:12:00,737 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) [2023-01-28 02:12:00,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 02:12:00,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 02:12:00,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:12:00,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 02:12:00,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:12:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:12:01,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:12:01,345 INFO L321 Elim1Store]: treesize reduction 13, result has 93.8 percent of original size [2023-01-28 02:12:01,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 220 [2023-01-28 02:12:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 02:12:05,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651805107] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:12:05,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:12:05,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-01-28 02:12:05,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025138042] [2023-01-28 02:12:05,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:12:05,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 02:12:05,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:12:05,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 02:12:05,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-01-28 02:12:05,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-28 02:12:05,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 136 transitions, 1843 flow. Second operand has 24 states, 24 states have (on average 90.25) internal successors, (2166), 24 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:05,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:12:05,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-28 02:12:05,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:12:06,557 INFO L130 PetriNetUnfolder]: 681/1281 cut-off events. [2023-01-28 02:12:06,557 INFO L131 PetriNetUnfolder]: For 26071/26071 co-relation queries the response was YES. [2023-01-28 02:12:06,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9743 conditions, 1281 events. 681/1281 cut-off events. For 26071/26071 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6833 event pairs, 133 based on Foata normal form. 48/1329 useless extension candidates. Maximal degree in co-relation 9658. Up to 906 conditions per place. [2023-01-28 02:12:06,566 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 129 selfloop transitions, 66 changer transitions 12/207 dead transitions. [2023-01-28 02:12:06,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 207 transitions, 2873 flow [2023-01-28 02:12:06,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 02:12:06,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 02:12:06,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2068 transitions. [2023-01-28 02:12:06,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29012345679012347 [2023-01-28 02:12:06,568 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2068 transitions. [2023-01-28 02:12:06,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2068 transitions. [2023-01-28 02:12:06,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:12:06,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2068 transitions. [2023-01-28 02:12:06,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 94.0) internal successors, (2068), 22 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:06,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:06,594 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:06,595 INFO L175 Difference]: Start difference. First operand has 166 places, 136 transitions, 1843 flow. Second operand 22 states and 2068 transitions. [2023-01-28 02:12:06,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 207 transitions, 2873 flow [2023-01-28 02:12:06,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 207 transitions, 2769 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-01-28 02:12:06,638 INFO L231 Difference]: Finished difference. Result has 176 places, 144 transitions, 2063 flow [2023-01-28 02:12:06,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2063, PETRI_PLACES=176, PETRI_TRANSITIONS=144} [2023-01-28 02:12:06,639 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 155 predicate places. [2023-01-28 02:12:06,639 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 144 transitions, 2063 flow [2023-01-28 02:12:06,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 90.25) internal successors, (2166), 24 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:06,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:12:06,639 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:12:06,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-28 02:12:06,846 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,SelfDestructingSolverStorable30 [2023-01-28 02:12:06,846 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:12:06,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:12:06,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1900475021, now seen corresponding path program 5 times [2023-01-28 02:12:06,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:12:06,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607686152] [2023-01-28 02:12:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:12:06,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:12:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:12:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:12:07,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:12:07,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607686152] [2023-01-28 02:12:07,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607686152] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:12:07,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003317017] [2023-01-28 02:12:07,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:12:07,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:12:07,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:12:07,119 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) [2023-01-28 02:12:07,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 02:12:07,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 02:12:07,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:12:07,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 02:12:07,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:12:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:12:07,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:12:07,471 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-28 02:12:07,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-28 02:12:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:12:07,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003317017] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:12:07,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:12:07,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 15 [2023-01-28 02:12:07,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930514111] [2023-01-28 02:12:07,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:12:07,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 02:12:07,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:12:07,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 02:12:07,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-01-28 02:12:07,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-01-28 02:12:07,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 144 transitions, 2063 flow. Second operand has 16 states, 16 states have (on average 114.4375) internal successors, (1831), 16 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:07,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:12:07,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-01-28 02:12:07,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:12:08,092 INFO L130 PetriNetUnfolder]: 775/1447 cut-off events. [2023-01-28 02:12:08,092 INFO L131 PetriNetUnfolder]: For 36374/36374 co-relation queries the response was YES. [2023-01-28 02:12:08,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11810 conditions, 1447 events. 775/1447 cut-off events. For 36374/36374 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7900 event pairs, 106 based on Foata normal form. 32/1479 useless extension candidates. Maximal degree in co-relation 11722. Up to 922 conditions per place. [2023-01-28 02:12:08,103 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 177 selfloop transitions, 49 changer transitions 1/227 dead transitions. [2023-01-28 02:12:08,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 227 transitions, 3627 flow [2023-01-28 02:12:08,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 02:12:08,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 02:12:08,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2012 transitions. [2023-01-28 02:12:08,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36528685548293394 [2023-01-28 02:12:08,105 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2012 transitions. [2023-01-28 02:12:08,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2012 transitions. [2023-01-28 02:12:08,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:12:08,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2012 transitions. [2023-01-28 02:12:08,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 118.3529411764706) internal successors, (2012), 17 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:08,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:08,110 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:08,110 INFO L175 Difference]: Start difference. First operand has 176 places, 144 transitions, 2063 flow. Second operand 17 states and 2012 transitions. [2023-01-28 02:12:08,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 227 transitions, 3627 flow [2023-01-28 02:12:08,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 227 transitions, 3485 flow, removed 30 selfloop flow, removed 15 redundant places. [2023-01-28 02:12:08,178 INFO L231 Difference]: Finished difference. Result has 183 places, 163 transitions, 2288 flow [2023-01-28 02:12:08,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2288, PETRI_PLACES=183, PETRI_TRANSITIONS=163} [2023-01-28 02:12:08,179 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 162 predicate places. [2023-01-28 02:12:08,179 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 163 transitions, 2288 flow [2023-01-28 02:12:08,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 114.4375) internal successors, (1831), 16 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:08,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:12:08,179 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:12:08,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-01-28 02:12:08,380 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,SelfDestructingSolverStorable31 [2023-01-28 02:12:08,380 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:12:08,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:12:08,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1115989726, now seen corresponding path program 13 times [2023-01-28 02:12:08,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:12:08,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470337591] [2023-01-28 02:12:08,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:12:08,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:12:08,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:12:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:12:08,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:12:08,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470337591] [2023-01-28 02:12:08,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470337591] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:12:08,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580937019] [2023-01-28 02:12:08,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 02:12:08,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:12:08,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:12:08,770 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) [2023-01-28 02:12:08,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 02:12:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:12:08,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 02:12:08,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:12:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:12:09,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:12:09,249 INFO L321 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2023-01-28 02:12:09,249 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 49 treesize of output 86 [2023-01-28 02:12:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:12:09,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580937019] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:12:09,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:12:09,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-01-28 02:12:09,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419811102] [2023-01-28 02:12:09,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:12:09,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 02:12:09,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:12:09,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 02:12:09,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2023-01-28 02:12:09,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-28 02:12:09,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 163 transitions, 2288 flow. Second operand has 32 states, 32 states have (on average 89.75) internal successors, (2872), 32 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:09,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:12:09,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-28 02:12:09,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:12:10,041 INFO L130 PetriNetUnfolder]: 776/1457 cut-off events. [2023-01-28 02:12:10,041 INFO L131 PetriNetUnfolder]: For 36803/36803 co-relation queries the response was YES. [2023-01-28 02:12:10,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12087 conditions, 1457 events. 776/1457 cut-off events. For 36803/36803 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8031 event pairs, 190 based on Foata normal form. 2/1459 useless extension candidates. Maximal degree in co-relation 11993. Up to 1391 conditions per place. [2023-01-28 02:12:10,051 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 147 selfloop transitions, 19 changer transitions 13/179 dead transitions. [2023-01-28 02:12:10,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 179 transitions, 2814 flow [2023-01-28 02:12:10,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 02:12:10,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 02:12:10,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1189 transitions. [2023-01-28 02:12:10,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2822886989553656 [2023-01-28 02:12:10,053 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1189 transitions. [2023-01-28 02:12:10,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1189 transitions. [2023-01-28 02:12:10,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:12:10,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1189 transitions. [2023-01-28 02:12:10,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 91.46153846153847) internal successors, (1189), 13 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:10,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:10,056 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:10,056 INFO L175 Difference]: Start difference. First operand has 183 places, 163 transitions, 2288 flow. Second operand 13 states and 1189 transitions. [2023-01-28 02:12:10,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 179 transitions, 2814 flow [2023-01-28 02:12:10,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 179 transitions, 2655 flow, removed 24 selfloop flow, removed 10 redundant places. [2023-01-28 02:12:10,137 INFO L231 Difference]: Finished difference. Result has 188 places, 163 transitions, 2201 flow [2023-01-28 02:12:10,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=2146, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2201, PETRI_PLACES=188, PETRI_TRANSITIONS=163} [2023-01-28 02:12:10,137 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 167 predicate places. [2023-01-28 02:12:10,137 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 163 transitions, 2201 flow [2023-01-28 02:12:10,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 89.75) internal successors, (2872), 32 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:10,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:12:10,138 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:12:10,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-28 02:12:10,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:12:10,338 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:12:10,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:12:10,338 INFO L85 PathProgramCache]: Analyzing trace with hash 966105765, now seen corresponding path program 6 times [2023-01-28 02:12:10,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:12:10,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276841414] [2023-01-28 02:12:10,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:12:10,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:12:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:12:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:12:10,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:12:10,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276841414] [2023-01-28 02:12:10,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276841414] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:12:10,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001173740] [2023-01-28 02:12:10,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:12:10,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:12:10,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:12:10,574 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) [2023-01-28 02:12:10,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 02:12:10,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 02:12:10,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:12:10,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-28 02:12:10,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:12:10,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:12:10,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:12:10,694 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-01-28 02:12:10,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-01-28 02:12:10,752 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 13 treesize of output 9 [2023-01-28 02:12:10,790 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 02:12:10,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 02:12:10,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-01-28 02:12:10,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-01-28 02:12:10,863 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 [2023-01-28 02:12:10,897 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 [2023-01-28 02:12:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:12:11,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:12:13,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:12:13,498 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 126 treesize of output 90 [2023-01-28 02:12:13,565 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-28 02:12:13,566 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 110572 treesize of output 101920 [2023-01-28 02:12:14,074 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:12:14,076 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:12:14,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:12:14,096 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 3164 treesize of output 3006 [2023-01-28 02:12:14,138 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:12:14,139 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:12:14,159 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:12:14,160 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 2956 treesize of output 2590 [2023-01-28 02:12:14,205 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:12:14,207 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:12:14,227 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:12:14,227 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 2540 treesize of output 1758 [2023-01-28 02:12:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:12:20,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001173740] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:12:20,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:12:20,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 30 [2023-01-28 02:12:20,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549868763] [2023-01-28 02:12:20,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:12:20,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 02:12:20,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:12:20,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 02:12:20,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=755, Unknown=22, NotChecked=0, Total=930 [2023-01-28 02:12:20,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 324 [2023-01-28 02:12:20,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 163 transitions, 2201 flow. Second operand has 31 states, 31 states have (on average 82.74193548387096) internal successors, (2565), 31 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:20,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:12:20,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 324 [2023-01-28 02:12:20,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:12:21,988 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~i_AB~0 4))) (let ((.cse2 (* c_~i_BA~0 4)) (.cse19 (select |c_#memory_int| c_~A~0.base)) (.cse10 (+ c_~A~0.offset 4 .cse4))) (let ((.cse5 (select .cse19 .cse10)) (.cse0 (<= c_~An~0 c_~i_BA~0)) (.cse3 (select .cse19 (+ c_~A~0.offset .cse2))) (.cse9 (+ c_~i_BA~0 1))) (and (or .cse0 (forall ((~B~0.offset Int) (~B~0.base Int)) (let ((.cse1 (select |c_#memory_int| ~B~0.base))) (or (not (= (select .cse1 (+ .cse2 ~B~0.offset)) .cse3)) (= (select .cse1 (+ ~B~0.offset 4 .cse4)) .cse5))))) (forall ((~B~0.offset Int) (v_ArrVal_1297 (Array Int Int)) (v_ArrVal_1296 (Array Int Int)) (~B~0.base Int) (v_~i_BA~0_100 Int) (v_ArrVal_1295 (Array Int Int))) (let ((.cse11 (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_1295) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1296) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1297))) (let ((.cse8 (select .cse11 c_~A~0.base)) (.cse6 (select .cse11 ~B~0.base))) (or (<= c_~An~0 v_~i_BA~0_100) (not (let ((.cse7 (* 4 v_~i_BA~0_100))) (= (select .cse6 (+ ~B~0.offset .cse7)) (select .cse8 (+ c_~A~0.offset .cse7))))) (< v_~i_BA~0_100 .cse9) (= (select .cse8 .cse10) (select .cse6 (+ ~B~0.offset 4 .cse4))))))) (or .cse0 (forall ((~B~0.offset Int) (~B~0.base Int)) (let ((.cse12 (select |c_#memory_int| ~B~0.base))) (or (not (= (select .cse12 (+ .cse2 ~B~0.offset)) .cse3)) (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse12 (+ ~B~0.offset .cse4))))))) (forall ((~B~0.offset Int) (v_ArrVal_1297 (Array Int Int)) (v_ArrVal_1296 (Array Int Int)) (~B~0.base Int) (v_~i_BA~0_100 Int)) (let ((.cse16 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1296) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1297))) (let ((.cse13 (select .cse16 ~B~0.base)) (.cse14 (select .cse16 c_~A~0.base))) (or (<= c_~An~0 v_~i_BA~0_100) (< v_~i_BA~0_100 .cse9) (= (select .cse13 (+ ~B~0.offset 4 .cse4)) (select .cse14 .cse10)) (not (let ((.cse15 (* 4 v_~i_BA~0_100))) (= (select .cse13 (+ ~B~0.offset .cse15)) (select .cse14 (+ c_~A~0.offset .cse15))))))))) (forall ((v_~i_BA~0_100 Int)) (or (<= c_~An~0 v_~i_BA~0_100) (forall ((~B~0.offset Int) (~B~0.base Int)) (let ((.cse17 (select |c_#memory_int| ~B~0.base))) (or (not (let ((.cse18 (* 4 v_~i_BA~0_100))) (= (select .cse17 (+ ~B~0.offset .cse18)) (select .cse19 (+ c_~A~0.offset .cse18))))) (= (select .cse17 (+ ~B~0.offset 4 .cse4)) .cse5)))) (< v_~i_BA~0_100 .cse9))) (forall ((~B~0.offset Int) (v_ArrVal_1297 (Array Int Int)) (v_~i_BA~0_100 Int) (~B~0.base Int)) (let ((.cse23 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1297))) (let ((.cse21 (select .cse23 ~B~0.base)) (.cse20 (select .cse23 c_~A~0.base))) (or (<= c_~An~0 v_~i_BA~0_100) (= (select .cse20 .cse10) (select .cse21 (+ ~B~0.offset 4 .cse4))) (not (let ((.cse22 (* 4 v_~i_BA~0_100))) (= (select .cse21 (+ ~B~0.offset .cse22)) (select .cse20 (+ c_~A~0.offset .cse22))))) (< v_~i_BA~0_100 .cse9))))) (or .cse0 (not (= .cse3 (select (select |c_#memory_int| c_~B~0.base) (+ .cse2 c_~B~0.offset))))) (or (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_114| Int)) (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_114|) 0))) (< (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (let ((.cse24 (< c_~An~0 (+ c_~i_BA~0 2)))) (and (or (< c_~An~0 (+ c_~i_AB~0 3)) .cse24) (or .cse24 (< c_~i_AB~0 .cse9))))))))) is different from false [2023-01-28 02:12:25,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 02:12:27,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 02:12:29,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 02:12:32,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 02:12:34,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 02:12:36,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 02:12:38,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 02:12:39,210 INFO L130 PetriNetUnfolder]: 1131/2153 cut-off events. [2023-01-28 02:12:39,210 INFO L131 PetriNetUnfolder]: For 65717/65717 co-relation queries the response was YES. [2023-01-28 02:12:39,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18415 conditions, 2153 events. 1131/2153 cut-off events. For 65717/65717 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12962 event pairs, 196 based on Foata normal form. 50/2203 useless extension candidates. Maximal degree in co-relation 17838. Up to 1383 conditions per place. [2023-01-28 02:12:39,227 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 260 selfloop transitions, 94 changer transitions 12/366 dead transitions. [2023-01-28 02:12:39,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 366 transitions, 5486 flow [2023-01-28 02:12:39,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 02:12:39,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 02:12:39,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3040 transitions. [2023-01-28 02:12:39,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26807760141093473 [2023-01-28 02:12:39,230 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3040 transitions. [2023-01-28 02:12:39,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3040 transitions. [2023-01-28 02:12:39,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:12:39,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3040 transitions. [2023-01-28 02:12:39,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 86.85714285714286) internal successors, (3040), 35 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:39,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 324.0) internal successors, (11664), 36 states have internal predecessors, (11664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:39,240 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 324.0) internal successors, (11664), 36 states have internal predecessors, (11664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:39,240 INFO L175 Difference]: Start difference. First operand has 188 places, 163 transitions, 2201 flow. Second operand 35 states and 3040 transitions. [2023-01-28 02:12:39,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 366 transitions, 5486 flow [2023-01-28 02:12:39,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 366 transitions, 5378 flow, removed 19 selfloop flow, removed 11 redundant places. [2023-01-28 02:12:39,351 INFO L231 Difference]: Finished difference. Result has 224 places, 238 transitions, 3624 flow [2023-01-28 02:12:39,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3624, PETRI_PLACES=224, PETRI_TRANSITIONS=238} [2023-01-28 02:12:39,351 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 203 predicate places. [2023-01-28 02:12:39,351 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 238 transitions, 3624 flow [2023-01-28 02:12:39,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 82.74193548387096) internal successors, (2565), 31 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:39,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:12:39,352 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:12:39,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-01-28 02:12:39,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:12:39,554 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:12:39,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:12:39,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1637860844, now seen corresponding path program 14 times [2023-01-28 02:12:39,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:12:39,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404873723] [2023-01-28 02:12:39,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:12:39,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:12:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:12:39,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:12:39,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:12:39,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404873723] [2023-01-28 02:12:39,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404873723] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:12:39,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400051675] [2023-01-28 02:12:39,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:12:39,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:12:39,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:12:39,945 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) [2023-01-28 02:12:39,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-28 02:12:40,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:12:40,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:12:40,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-01-28 02:12:40,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:12:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:12:40,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:12:40,445 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-28 02:12:40,445 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 47 treesize of output 80 [2023-01-28 02:12:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:12:40,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400051675] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:12:40,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:12:40,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-01-28 02:12:40,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851806032] [2023-01-28 02:12:40,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:12:40,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 02:12:40,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:12:40,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 02:12:40,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 02:12:40,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-28 02:12:40,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 238 transitions, 3624 flow. Second operand has 33 states, 33 states have (on average 89.6969696969697) internal successors, (2960), 33 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:40,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:12:40,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-28 02:12:40,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:12:41,365 INFO L130 PetriNetUnfolder]: 1117/2125 cut-off events. [2023-01-28 02:12:41,366 INFO L131 PetriNetUnfolder]: For 76794/76794 co-relation queries the response was YES. [2023-01-28 02:12:41,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19935 conditions, 2125 events. 1117/2125 cut-off events. For 76794/76794 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12730 event pairs, 313 based on Foata normal form. 4/2129 useless extension candidates. Maximal degree in co-relation 19313. Up to 2017 conditions per place. [2023-01-28 02:12:41,383 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 205 selfloop transitions, 41 changer transitions 3/249 dead transitions. [2023-01-28 02:12:41,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 249 transitions, 4247 flow [2023-01-28 02:12:41,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 02:12:41,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 02:12:41,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1187 transitions. [2023-01-28 02:12:41,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2818138651471985 [2023-01-28 02:12:41,386 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1187 transitions. [2023-01-28 02:12:41,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1187 transitions. [2023-01-28 02:12:41,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:12:41,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1187 transitions. [2023-01-28 02:12:41,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 91.3076923076923) internal successors, (1187), 13 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:41,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:41,390 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:41,390 INFO L175 Difference]: Start difference. First operand has 224 places, 238 transitions, 3624 flow. Second operand 13 states and 1187 transitions. [2023-01-28 02:12:41,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 249 transitions, 4247 flow [2023-01-28 02:12:41,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 249 transitions, 3837 flow, removed 178 selfloop flow, removed 6 redundant places. [2023-01-28 02:12:41,538 INFO L231 Difference]: Finished difference. Result has 230 places, 241 transitions, 3394 flow [2023-01-28 02:12:41,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3230, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3394, PETRI_PLACES=230, PETRI_TRANSITIONS=241} [2023-01-28 02:12:41,538 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 209 predicate places. [2023-01-28 02:12:41,538 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 241 transitions, 3394 flow [2023-01-28 02:12:41,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 89.6969696969697) internal successors, (2960), 33 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:41,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:12:41,539 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:12:41,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-01-28 02:12:41,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:12:41,740 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:12:41,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:12:41,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1833946803, now seen corresponding path program 7 times [2023-01-28 02:12:41,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:12:41,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428269574] [2023-01-28 02:12:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:12:41,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:12:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:12:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:12:42,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:12:42,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428269574] [2023-01-28 02:12:42,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428269574] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:12:42,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261552045] [2023-01-28 02:12:42,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 02:12:42,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:12:42,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:12:42,018 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) [2023-01-28 02:12:42,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-28 02:12:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:12:42,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 02:12:42,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:12:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:12:42,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:12:42,363 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 02:12:42,363 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 40 treesize of output 56 [2023-01-28 02:12:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 02:12:42,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261552045] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:12:42,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:12:42,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 5] total 20 [2023-01-28 02:12:42,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316678110] [2023-01-28 02:12:42,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:12:42,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 02:12:42,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:12:42,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 02:12:42,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-01-28 02:12:42,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 324 [2023-01-28 02:12:42,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 241 transitions, 3394 flow. Second operand has 21 states, 21 states have (on average 104.47619047619048) internal successors, (2194), 21 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:42,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:12:42,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 324 [2023-01-28 02:12:42,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:12:43,275 INFO L130 PetriNetUnfolder]: 1189/2262 cut-off events. [2023-01-28 02:12:43,275 INFO L131 PetriNetUnfolder]: For 84153/84153 co-relation queries the response was YES. [2023-01-28 02:12:43,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20196 conditions, 2262 events. 1189/2262 cut-off events. For 84153/84153 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 13706 event pairs, 233 based on Foata normal form. 44/2306 useless extension candidates. Maximal degree in co-relation 20084. Up to 1610 conditions per place. [2023-01-28 02:12:43,303 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 212 selfloop transitions, 110 changer transitions 7/329 dead transitions. [2023-01-28 02:12:43,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 329 transitions, 5306 flow [2023-01-28 02:12:43,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 02:12:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 02:12:43,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2153 transitions. [2023-01-28 02:12:43,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3322530864197531 [2023-01-28 02:12:43,306 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2153 transitions. [2023-01-28 02:12:43,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2153 transitions. [2023-01-28 02:12:43,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:12:43,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2153 transitions. [2023-01-28 02:12:43,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 107.65) internal successors, (2153), 20 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:43,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:43,312 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:43,312 INFO L175 Difference]: Start difference. First operand has 230 places, 241 transitions, 3394 flow. Second operand 20 states and 2153 transitions. [2023-01-28 02:12:43,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 329 transitions, 5306 flow [2023-01-28 02:12:43,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 329 transitions, 5138 flow, removed 49 selfloop flow, removed 10 redundant places. [2023-01-28 02:12:43,494 INFO L231 Difference]: Finished difference. Result has 238 places, 272 transitions, 3996 flow [2023-01-28 02:12:43,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3257, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3996, PETRI_PLACES=238, PETRI_TRANSITIONS=272} [2023-01-28 02:12:43,495 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 217 predicate places. [2023-01-28 02:12:43,495 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 272 transitions, 3996 flow [2023-01-28 02:12:43,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 104.47619047619048) internal successors, (2194), 21 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:43,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:12:43,495 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:12:43,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-28 02:12:43,704 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,SelfDestructingSolverStorable35 [2023-01-28 02:12:43,704 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:12:43,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:12:43,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1288803642, now seen corresponding path program 15 times [2023-01-28 02:12:43,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:12:43,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665570870] [2023-01-28 02:12:43,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:12:43,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:12:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:12:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:12:44,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:12:44,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665570870] [2023-01-28 02:12:44,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665570870] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:12:44,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63939273] [2023-01-28 02:12:44,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:12:44,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:12:44,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:12:44,111 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) [2023-01-28 02:12:44,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-28 02:12:44,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 02:12:44,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:12:44,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 02:12:44,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:12:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:12:44,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:12:44,676 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 02:12:44,677 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 40 treesize of output 56 [2023-01-28 02:12:44,701 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 02:12:44,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 02:12:44,708 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 02:12:44,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 02:12:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:12:44,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63939273] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:12:44,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:12:44,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 30 [2023-01-28 02:12:44,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846475202] [2023-01-28 02:12:44,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:12:44,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 02:12:44,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:12:44,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 02:12:44,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2023-01-28 02:12:44,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-28 02:12:44,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 272 transitions, 3996 flow. Second operand has 31 states, 31 states have (on average 89.58064516129032) internal successors, (2777), 31 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:44,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:12:44,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-28 02:12:44,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:12:45,758 INFO L130 PetriNetUnfolder]: 1173/2238 cut-off events. [2023-01-28 02:12:45,759 INFO L131 PetriNetUnfolder]: For 77866/77866 co-relation queries the response was YES. [2023-01-28 02:12:45,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20130 conditions, 2238 events. 1173/2238 cut-off events. For 77866/77866 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13557 event pairs, 277 based on Foata normal form. 24/2262 useless extension candidates. Maximal degree in co-relation 20018. Up to 1996 conditions per place. [2023-01-28 02:12:45,780 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 237 selfloop transitions, 59 changer transitions 1/297 dead transitions. [2023-01-28 02:12:45,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 297 transitions, 4865 flow [2023-01-28 02:12:45,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 02:12:45,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 02:12:45,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1386 transitions. [2023-01-28 02:12:45,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2851851851851852 [2023-01-28 02:12:45,781 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1386 transitions. [2023-01-28 02:12:45,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1386 transitions. [2023-01-28 02:12:45,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:12:45,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1386 transitions. [2023-01-28 02:12:45,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 92.4) internal successors, (1386), 15 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:45,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:45,785 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:45,785 INFO L175 Difference]: Start difference. First operand has 238 places, 272 transitions, 3996 flow. Second operand 15 states and 1386 transitions. [2023-01-28 02:12:45,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 297 transitions, 4865 flow [2023-01-28 02:12:45,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 297 transitions, 4599 flow, removed 72 selfloop flow, removed 10 redundant places. [2023-01-28 02:12:45,966 INFO L231 Difference]: Finished difference. Result has 243 places, 273 transitions, 3908 flow [2023-01-28 02:12:45,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3750, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3908, PETRI_PLACES=243, PETRI_TRANSITIONS=273} [2023-01-28 02:12:45,966 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 222 predicate places. [2023-01-28 02:12:45,967 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 273 transitions, 3908 flow [2023-01-28 02:12:45,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 89.58064516129032) internal successors, (2777), 31 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:45,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:12:45,967 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:12:45,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-01-28 02:12:46,167 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,SelfDestructingSolverStorable36 [2023-01-28 02:12:46,168 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:12:46,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:12:46,168 INFO L85 PathProgramCache]: Analyzing trace with hash -432307696, now seen corresponding path program 16 times [2023-01-28 02:12:46,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:12:46,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781035986] [2023-01-28 02:12:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:12:46,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:12:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:12:46,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:12:46,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:12:46,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781035986] [2023-01-28 02:12:46,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781035986] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:12:46,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091246895] [2023-01-28 02:12:46,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:12:46,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:12:46,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:12:46,573 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) [2023-01-28 02:12:46,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-28 02:12:46,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:12:46,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:12:46,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 02:12:46,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:12:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:12:46,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:12:47,113 INFO L321 Elim1Store]: treesize reduction 13, result has 93.8 percent of original size [2023-01-28 02:12:47,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 220 [2023-01-28 02:12:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 02:12:48,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091246895] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:12:48,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:12:48,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-01-28 02:12:48,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557877437] [2023-01-28 02:12:48,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:12:48,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 02:12:48,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:12:48,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 02:12:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-01-28 02:12:48,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-28 02:12:48,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 273 transitions, 3908 flow. Second operand has 24 states, 24 states have (on average 90.16666666666667) internal successors, (2164), 24 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:48,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:12:48,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-28 02:12:48,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:12:49,508 INFO L130 PetriNetUnfolder]: 1159/2206 cut-off events. [2023-01-28 02:12:49,508 INFO L131 PetriNetUnfolder]: For 72311/72311 co-relation queries the response was YES. [2023-01-28 02:12:49,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19755 conditions, 2206 events. 1159/2206 cut-off events. For 72311/72311 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13242 event pairs, 232 based on Foata normal form. 18/2224 useless extension candidates. Maximal degree in co-relation 19644. Up to 1656 conditions per place. [2023-01-28 02:12:49,527 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 187 selfloop transitions, 104 changer transitions 8/299 dead transitions. [2023-01-28 02:12:49,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 299 transitions, 4733 flow [2023-01-28 02:12:49,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 02:12:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 02:12:49,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1658 transitions. [2023-01-28 02:12:49,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2842935528120713 [2023-01-28 02:12:49,529 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1658 transitions. [2023-01-28 02:12:49,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1658 transitions. [2023-01-28 02:12:49,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:12:49,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1658 transitions. [2023-01-28 02:12:49,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 92.11111111111111) internal successors, (1658), 18 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:49,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:49,533 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:49,533 INFO L175 Difference]: Start difference. First operand has 243 places, 273 transitions, 3908 flow. Second operand 18 states and 1658 transitions. [2023-01-28 02:12:49,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 299 transitions, 4733 flow [2023-01-28 02:12:49,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 299 transitions, 4599 flow, removed 12 selfloop flow, removed 13 redundant places. [2023-01-28 02:12:49,660 INFO L231 Difference]: Finished difference. Result has 248 places, 270 transitions, 3966 flow [2023-01-28 02:12:49,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3740, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3966, PETRI_PLACES=248, PETRI_TRANSITIONS=270} [2023-01-28 02:12:49,660 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 227 predicate places. [2023-01-28 02:12:49,660 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 270 transitions, 3966 flow [2023-01-28 02:12:49,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 90.16666666666667) internal successors, (2164), 24 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:12:49,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:12:49,661 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:12:49,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-01-28 02:12:49,865 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,SelfDestructingSolverStorable37 [2023-01-28 02:12:49,865 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:12:49,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:12:49,865 INFO L85 PathProgramCache]: Analyzing trace with hash 559278698, now seen corresponding path program 17 times [2023-01-28 02:12:49,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:12:49,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486943838] [2023-01-28 02:12:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:12:49,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:12:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:12:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:12:50,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:12:50,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486943838] [2023-01-28 02:12:50,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486943838] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:12:50,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167994596] [2023-01-28 02:12:50,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:12:50,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:12:50,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:12:50,437 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) [2023-01-28 02:12:50,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-28 02:12:50,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 02:12:50,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:12:50,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-28 02:12:50,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:12:50,756 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 [2023-01-28 02:12:50,818 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 [2023-01-28 02:12:51,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:12:51,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:12:51,019 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 02:12:51,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 25 [2023-01-28 02:12:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:12:51,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:12:51,473 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:12:51,473 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 52 treesize of output 41 [2023-01-28 02:12:51,487 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:12:51,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 86 [2023-01-28 02:12:51,495 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:12:51,495 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 74 treesize of output 55 [2023-01-28 02:12:51,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:12:51,523 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 150 treesize of output 90 [2023-01-28 02:12:51,543 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:12:51,543 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 3140 treesize of output 2996 [2023-01-28 02:12:51,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:12:51,613 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 1560 treesize of output 1288 [2023-01-28 02:13:52,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:13:52,834 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 72617 treesize of output 48356 [2023-01-28 02:14:29,626 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 02:14:29,636 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 44635 treesize of output 37498 [2023-01-28 02:14:42,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:14:42,962 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:14:42,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58647 treesize of output 43215 [2023-01-28 02:14:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 02:14:47,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167994596] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:14:47,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:14:47,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 32 [2023-01-28 02:14:47,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621063602] [2023-01-28 02:14:47,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:14:47,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 02:14:47,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:14:47,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 02:14:47,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=938, Unknown=4, NotChecked=0, Total=1056 [2023-01-28 02:14:47,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 324 [2023-01-28 02:14:47,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 270 transitions, 3966 flow. Second operand has 33 states, 33 states have (on average 81.66666666666667) internal successors, (2695), 33 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:14:47,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:14:47,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 324 [2023-01-28 02:14:47,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:14:49,228 INFO L130 PetriNetUnfolder]: 1320/2473 cut-off events. [2023-01-28 02:14:49,228 INFO L131 PetriNetUnfolder]: For 88807/88807 co-relation queries the response was YES. [2023-01-28 02:14:49,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22467 conditions, 2473 events. 1320/2473 cut-off events. For 88807/88807 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15065 event pairs, 213 based on Foata normal form. 28/2501 useless extension candidates. Maximal degree in co-relation 22355. Up to 1766 conditions per place. [2023-01-28 02:14:49,248 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 284 selfloop transitions, 76 changer transitions 1/361 dead transitions. [2023-01-28 02:14:49,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 361 transitions, 5807 flow [2023-01-28 02:14:49,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 02:14:49,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 02:14:49,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1729 transitions. [2023-01-28 02:14:49,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.266820987654321 [2023-01-28 02:14:49,250 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1729 transitions. [2023-01-28 02:14:49,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1729 transitions. [2023-01-28 02:14:49,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:14:49,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1729 transitions. [2023-01-28 02:14:49,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 86.45) internal successors, (1729), 20 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:14:49,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:14:49,255 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:14:49,255 INFO L175 Difference]: Start difference. First operand has 248 places, 270 transitions, 3966 flow. Second operand 20 states and 1729 transitions. [2023-01-28 02:14:49,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 361 transitions, 5807 flow [2023-01-28 02:14:49,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 361 transitions, 5563 flow, removed 12 selfloop flow, removed 17 redundant places. [2023-01-28 02:14:49,400 INFO L231 Difference]: Finished difference. Result has 254 places, 290 transitions, 4302 flow [2023-01-28 02:14:49,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3722, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4302, PETRI_PLACES=254, PETRI_TRANSITIONS=290} [2023-01-28 02:14:49,400 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 233 predicate places. [2023-01-28 02:14:49,400 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 290 transitions, 4302 flow [2023-01-28 02:14:49,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 81.66666666666667) internal successors, (2695), 33 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:14:49,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:14:49,401 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:14:49,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-01-28 02:14:49,605 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,SelfDestructingSolverStorable38 [2023-01-28 02:14:49,605 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:14:49,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:14:49,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1611664731, now seen corresponding path program 8 times [2023-01-28 02:14:49,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:14:49,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713562693] [2023-01-28 02:14:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:14:49,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:14:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:14:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:14:49,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:14:49,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713562693] [2023-01-28 02:14:49,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713562693] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:14:49,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220050625] [2023-01-28 02:14:49,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:14:49,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:14:49,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:14:49,938 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) [2023-01-28 02:14:49,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-28 02:14:50,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:14:50,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:14:50,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 02:14:50,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:14:50,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:14:50,213 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 14 treesize of output 16 [2023-01-28 02:14:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:14:50,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:14:50,351 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1579 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1579))) (let ((.cse2 (select .cse0 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1 4)) (select .cse2 (+ .cse1 ~B~0.offset 4))))) (= (select .cse2 (+ ~B~0.offset (* c_~i_AB~0 4))) |c_thread1Thread1of1ForFork1_#t~mem1|))))) is different from false [2023-01-28 02:14:50,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:14:50,382 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 156 treesize of output 178 [2023-01-28 02:14:50,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:14:50,400 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 88 treesize of output 89 [2023-01-28 02:14:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:14:50,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220050625] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:14:50,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:14:50,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2023-01-28 02:14:50,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485423912] [2023-01-28 02:14:50,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:14:50,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 02:14:50,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:14:50,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 02:14:50,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=481, Unknown=1, NotChecked=44, Total=600 [2023-01-28 02:14:50,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 324 [2023-01-28 02:14:50,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 290 transitions, 4302 flow. Second operand has 25 states, 25 states have (on average 109.92) internal successors, (2748), 25 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:14:50,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:14:50,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 324 [2023-01-28 02:14:50,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:14:56,494 INFO L130 PetriNetUnfolder]: 1351/2531 cut-off events. [2023-01-28 02:14:56,494 INFO L131 PetriNetUnfolder]: For 102767/102767 co-relation queries the response was YES. [2023-01-28 02:14:56,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24115 conditions, 2531 events. 1351/2531 cut-off events. For 102767/102767 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 15491 event pairs, 270 based on Foata normal form. 4/2535 useless extension candidates. Maximal degree in co-relation 23997. Up to 2150 conditions per place. [2023-01-28 02:14:56,519 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 250 selfloop transitions, 84 changer transitions 13/347 dead transitions. [2023-01-28 02:14:56,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 347 transitions, 5680 flow [2023-01-28 02:14:56,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 02:14:56,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 02:14:56,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1601 transitions. [2023-01-28 02:14:56,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35295414462081126 [2023-01-28 02:14:56,521 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1601 transitions. [2023-01-28 02:14:56,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1601 transitions. [2023-01-28 02:14:56,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:14:56,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1601 transitions. [2023-01-28 02:14:56,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 114.35714285714286) internal successors, (1601), 14 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:14:56,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:14:56,525 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:14:56,525 INFO L175 Difference]: Start difference. First operand has 254 places, 290 transitions, 4302 flow. Second operand 14 states and 1601 transitions. [2023-01-28 02:14:56,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 347 transitions, 5680 flow [2023-01-28 02:14:56,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 347 transitions, 5424 flow, removed 87 selfloop flow, removed 10 redundant places. [2023-01-28 02:14:56,759 INFO L231 Difference]: Finished difference. Result has 259 places, 308 transitions, 4591 flow [2023-01-28 02:14:56,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4062, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4591, PETRI_PLACES=259, PETRI_TRANSITIONS=308} [2023-01-28 02:14:56,760 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 238 predicate places. [2023-01-28 02:14:56,760 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 308 transitions, 4591 flow [2023-01-28 02:14:56,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 109.92) internal successors, (2748), 25 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:14:56,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:14:56,760 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:14:56,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-01-28 02:14:56,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-28 02:14:56,961 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:14:56,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:14:56,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1001465655, now seen corresponding path program 9 times [2023-01-28 02:14:56,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:14:56,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146418470] [2023-01-28 02:14:56,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:14:56,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:14:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:14:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:14:57,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:14:57,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146418470] [2023-01-28 02:14:57,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146418470] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:14:57,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39718207] [2023-01-28 02:14:57,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:14:57,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:14:57,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:14:57,285 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) [2023-01-28 02:14:57,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-28 02:14:57,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 02:14:57,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:14:57,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-28 02:14:57,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:14:57,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:14:57,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:14:57,606 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 02:14:57,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2023-01-28 02:14:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:14:57,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:14:57,777 INFO L321 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-01-28 02:14:57,778 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 130 treesize of output 145 [2023-01-28 02:14:57,786 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:14:57,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 55 [2023-01-28 02:14:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:14:57,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39718207] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:14:57,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:14:57,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-01-28 02:14:57,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101953651] [2023-01-28 02:14:57,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:14:57,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 02:14:57,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:14:57,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 02:14:57,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=565, Unknown=8, NotChecked=0, Total=650 [2023-01-28 02:14:57,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 324 [2023-01-28 02:14:57,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 308 transitions, 4591 flow. Second operand has 26 states, 26 states have (on average 105.84615384615384) internal successors, (2752), 26 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:14:57,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:14:57,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 324 [2023-01-28 02:14:57,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:14:59,012 INFO L130 PetriNetUnfolder]: 1343/2518 cut-off events. [2023-01-28 02:14:59,012 INFO L131 PetriNetUnfolder]: For 104932/104932 co-relation queries the response was YES. [2023-01-28 02:14:59,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24522 conditions, 2518 events. 1343/2518 cut-off events. For 104932/104932 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15371 event pairs, 279 based on Foata normal form. 4/2522 useless extension candidates. Maximal degree in co-relation 24404. Up to 2150 conditions per place. [2023-01-28 02:14:59,039 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 255 selfloop transitions, 75 changer transitions 13/343 dead transitions. [2023-01-28 02:14:59,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 343 transitions, 5647 flow [2023-01-28 02:14:59,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 02:14:59,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 02:14:59,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1221 transitions. [2023-01-28 02:14:59,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3425925925925926 [2023-01-28 02:14:59,041 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1221 transitions. [2023-01-28 02:14:59,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1221 transitions. [2023-01-28 02:14:59,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:14:59,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1221 transitions. [2023-01-28 02:14:59,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 111.0) internal successors, (1221), 11 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:14:59,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 324.0) internal successors, (3888), 12 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:14:59,044 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 324.0) internal successors, (3888), 12 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:14:59,044 INFO L175 Difference]: Start difference. First operand has 259 places, 308 transitions, 4591 flow. Second operand 11 states and 1221 transitions. [2023-01-28 02:14:59,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 343 transitions, 5647 flow [2023-01-28 02:14:59,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 343 transitions, 5412 flow, removed 26 selfloop flow, removed 11 redundant places. [2023-01-28 02:14:59,229 INFO L231 Difference]: Finished difference. Result has 257 places, 306 transitions, 4492 flow [2023-01-28 02:14:59,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4359, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4492, PETRI_PLACES=257, PETRI_TRANSITIONS=306} [2023-01-28 02:14:59,229 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 236 predicate places. [2023-01-28 02:14:59,229 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 306 transitions, 4492 flow [2023-01-28 02:14:59,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 105.84615384615384) internal successors, (2752), 26 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:14:59,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:14:59,230 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:14:59,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-01-28 02:14:59,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:14:59,431 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:14:59,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:14:59,431 INFO L85 PathProgramCache]: Analyzing trace with hash 695500837, now seen corresponding path program 10 times [2023-01-28 02:14:59,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:14:59,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660181454] [2023-01-28 02:14:59,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:14:59,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:14:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:14:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:14:59,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:14:59,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660181454] [2023-01-28 02:14:59,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660181454] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:14:59,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676710161] [2023-01-28 02:14:59,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:14:59,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:14:59,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:14:59,728 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) [2023-01-28 02:14:59,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-28 02:14:59,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:14:59,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:14:59,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-28 02:14:59,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:14:59,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:14:59,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 02:15:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:15:00,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:15:00,130 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1673 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1673))) (let ((.cse0 (select .cse1 ~B~0.base))) (or (= (select .cse0 (+ ~B~0.offset (* c_~i_AB~0 4))) |c_thread1Thread1of1ForFork1_#t~mem1|) (not (let ((.cse2 (* c_~i_BA~0 4))) (= (select (select .cse1 c_~A~0.base) (+ c_~A~0.offset .cse2 4)) (select .cse0 (+ .cse2 ~B~0.offset 4))))))))) is different from false [2023-01-28 02:15:00,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:15:00,158 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 156 treesize of output 178 [2023-01-28 02:15:00,174 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:15:00,175 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 88 treesize of output 89 [2023-01-28 02:15:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:15:00,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676710161] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:15:00,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:15:00,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2023-01-28 02:15:00,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160682924] [2023-01-28 02:15:00,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:15:00,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 02:15:00,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:15:00,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 02:15:00,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=480, Unknown=1, NotChecked=44, Total=600 [2023-01-28 02:15:00,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 324 [2023-01-28 02:15:00,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 306 transitions, 4492 flow. Second operand has 25 states, 25 states have (on average 110.08) internal successors, (2752), 25 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:00,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:15:00,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 324 [2023-01-28 02:15:00,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:15:11,932 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] [2023-01-28 02:15:12,779 INFO L130 PetriNetUnfolder]: 1331/2486 cut-off events. [2023-01-28 02:15:12,780 INFO L131 PetriNetUnfolder]: For 103972/103972 co-relation queries the response was YES. [2023-01-28 02:15:12,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24152 conditions, 2486 events. 1331/2486 cut-off events. For 103972/103972 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15084 event pairs, 294 based on Foata normal form. 4/2490 useless extension candidates. Maximal degree in co-relation 24046. Up to 2060 conditions per place. [2023-01-28 02:15:12,805 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 234 selfloop transitions, 103 changer transitions 3/340 dead transitions. [2023-01-28 02:15:12,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 340 transitions, 5667 flow [2023-01-28 02:15:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 02:15:12,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 02:15:12,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1816 transitions. [2023-01-28 02:15:12,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35030864197530864 [2023-01-28 02:15:12,807 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1816 transitions. [2023-01-28 02:15:12,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1816 transitions. [2023-01-28 02:15:12,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:15:12,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1816 transitions. [2023-01-28 02:15:12,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 113.5) internal successors, (1816), 16 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:12,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 324.0) internal successors, (5508), 17 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:12,811 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 324.0) internal successors, (5508), 17 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:12,811 INFO L175 Difference]: Start difference. First operand has 257 places, 306 transitions, 4492 flow. Second operand 16 states and 1816 transitions. [2023-01-28 02:15:12,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 340 transitions, 5667 flow [2023-01-28 02:15:12,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 340 transitions, 5517 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-01-28 02:15:12,983 INFO L231 Difference]: Finished difference. Result has 263 places, 308 transitions, 4617 flow [2023-01-28 02:15:12,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4344, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4617, PETRI_PLACES=263, PETRI_TRANSITIONS=308} [2023-01-28 02:15:12,984 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 242 predicate places. [2023-01-28 02:15:12,984 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 308 transitions, 4617 flow [2023-01-28 02:15:12,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 110.08) internal successors, (2752), 25 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:12,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:15:12,984 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:15:12,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-01-28 02:15:13,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:15:13,185 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:15:13,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:15:13,185 INFO L85 PathProgramCache]: Analyzing trace with hash 95734045, now seen corresponding path program 11 times [2023-01-28 02:15:13,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:15:13,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968533192] [2023-01-28 02:15:13,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:15:13,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:15:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:15:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:15:13,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:15:13,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968533192] [2023-01-28 02:15:13,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968533192] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:15:13,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720840168] [2023-01-28 02:15:13,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:15:13,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:15:13,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:15:13,469 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) [2023-01-28 02:15:13,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-01-28 02:15:13,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:15:13,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:15:13,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 02:15:13,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:15:13,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:15:13,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 02:15:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:15:13,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:15:13,888 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1720 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1720))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse1 4 c_~B~0.offset)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse1 4))))) (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse0 (+ c_~B~0.offset (* c_~i_AB~0 4)))))))) is different from false [2023-01-28 02:15:13,918 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:15:13,918 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 156 treesize of output 178 [2023-01-28 02:15:13,935 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:15:13,935 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 88 treesize of output 89 [2023-01-28 02:15:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:15:14,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720840168] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:15:14,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:15:14,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 8] total 25 [2023-01-28 02:15:14,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620907792] [2023-01-28 02:15:14,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:15:14,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 02:15:14,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:15:14,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 02:15:14,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=520, Unknown=1, NotChecked=46, Total=650 [2023-01-28 02:15:14,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 324 [2023-01-28 02:15:14,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 308 transitions, 4617 flow. Second operand has 26 states, 26 states have (on average 99.88461538461539) internal successors, (2597), 26 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:14,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:15:14,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 324 [2023-01-28 02:15:14,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:15:19,608 INFO L130 PetriNetUnfolder]: 1311/2446 cut-off events. [2023-01-28 02:15:19,608 INFO L131 PetriNetUnfolder]: For 103193/103193 co-relation queries the response was YES. [2023-01-28 02:15:19,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23955 conditions, 2446 events. 1311/2446 cut-off events. For 103193/103193 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14779 event pairs, 276 based on Foata normal form. 8/2454 useless extension candidates. Maximal degree in co-relation 23837. Up to 2106 conditions per place. [2023-01-28 02:15:19,637 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 238 selfloop transitions, 85 changer transitions 15/338 dead transitions. [2023-01-28 02:15:19,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 338 transitions, 5579 flow [2023-01-28 02:15:19,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 02:15:19,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 02:15:19,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1752 transitions. [2023-01-28 02:15:19,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31808278867102396 [2023-01-28 02:15:19,639 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1752 transitions. [2023-01-28 02:15:19,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1752 transitions. [2023-01-28 02:15:19,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:15:19,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1752 transitions. [2023-01-28 02:15:19,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 103.05882352941177) internal successors, (1752), 17 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:19,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:19,643 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:19,643 INFO L175 Difference]: Start difference. First operand has 263 places, 308 transitions, 4617 flow. Second operand 17 states and 1752 transitions. [2023-01-28 02:15:19,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 338 transitions, 5579 flow [2023-01-28 02:15:19,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 338 transitions, 5355 flow, removed 16 selfloop flow, removed 13 redundant places. [2023-01-28 02:15:19,841 INFO L231 Difference]: Finished difference. Result has 266 places, 304 transitions, 4515 flow [2023-01-28 02:15:19,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4377, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4515, PETRI_PLACES=266, PETRI_TRANSITIONS=304} [2023-01-28 02:15:19,842 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 245 predicate places. [2023-01-28 02:15:19,842 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 304 transitions, 4515 flow [2023-01-28 02:15:19,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 99.88461538461539) internal successors, (2597), 26 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:19,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:15:19,842 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:15:19,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-01-28 02:15:20,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:15:20,047 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:15:20,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:15:20,048 INFO L85 PathProgramCache]: Analyzing trace with hash -185131032, now seen corresponding path program 18 times [2023-01-28 02:15:20,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:15:20,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813834248] [2023-01-28 02:15:20,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:15:20,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:15:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:15:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:15:20,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:15:20,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813834248] [2023-01-28 02:15:20,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813834248] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:15:20,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043195816] [2023-01-28 02:15:20,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:15:20,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:15:20,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:15:20,528 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) [2023-01-28 02:15:20,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-01-28 02:15:20,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 02:15:20,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:15:20,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 02:15:20,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:15:20,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:15:20,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 02:15:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:15:20,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:15:21,210 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_~i_AB~0 4))) (let ((.cse4 (+ c_~i_BA~0 1)) (.cse5 (forall ((v_ArrVal_1767 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1767) ~B~0.base) (+ ~B~0.offset .cse3))))))) (and (forall ((v_ArrVal_1767 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1767))) (let ((.cse2 (select .cse0 ~B~0.base))) (or (let ((.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1 4)) (select .cse2 (+ .cse1 ~B~0.offset 4)))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse2 (+ ~B~0.offset .cse3)))))))) (or (< .cse4 c_~Bn~0) .cse5) (or (< .cse4 c_~An~0) .cse5)))) is different from false [2023-01-28 02:15:21,300 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:15:21,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 263 treesize of output 373 [2023-01-28 02:15:21,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:15:21,333 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 155 treesize of output 157 [2023-01-28 02:15:21,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 115 [2023-01-28 02:15:21,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 109 [2023-01-28 02:15:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:15:26,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043195816] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:15:26,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:15:26,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 26 [2023-01-28 02:15:26,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019967108] [2023-01-28 02:15:26,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:15:26,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 02:15:26,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:15:26,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 02:15:26,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=580, Unknown=1, NotChecked=48, Total=702 [2023-01-28 02:15:26,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 324 [2023-01-28 02:15:26,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 304 transitions, 4515 flow. Second operand has 27 states, 27 states have (on average 86.0) internal successors, (2322), 27 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:26,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:15:26,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 324 [2023-01-28 02:15:26,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:15:27,537 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse7 (+ c_~i_BA~0 1)) (.cse6 (* c_~i_AB~0 4)) (.cse5 (* c_~i_BA~0 4))) (let ((.cse3 (+ c_~A~0.offset .cse5 4)) (.cse10 (forall ((v_ArrVal_1767 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1767) ~B~0.base) (+ ~B~0.offset .cse6)))))) (.cse11 (< .cse7 c_~An~0)) (.cse1 (select |c_#memory_int| c_~B~0.base)) (.cse0 (select |c_#memory_int| c_~A~0.base)) (.cse9 (< .cse7 c_~Bn~0)) (.cse12 (forall ((~B~0.offset Int) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select |c_#memory_int| ~B~0.base) (+ ~B~0.offset .cse6))))))) (and (= (select .cse0 4) (select .cse1 (+ 4 c_~B~0.offset))) (forall ((v_ArrVal_1767 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1767))) (let ((.cse4 (select .cse2 ~B~0.base))) (or (= (select (select .cse2 c_~A~0.base) .cse3) (select .cse4 (+ .cse5 ~B~0.offset 4))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse4 (+ ~B~0.offset .cse6)))))))) (= c_~i_AB~0 .cse7) (< 1 c_~An~0) (forall ((~B~0.offset Int) (~B~0.base Int)) (let ((.cse8 (select |c_#memory_int| ~B~0.base))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse8 (+ ~B~0.offset .cse6)))) (= (select .cse0 .cse3) (select .cse8 (+ .cse5 ~B~0.offset 4)))))) (or .cse9 .cse10) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| c_~A~0.base)) (= c_~i_BA~0 1) (or .cse11 .cse10) (= c_~B~0.offset 0) (or .cse11 .cse12) (<= .cse7 c_~An~0) (= c_~A~0.offset 0) (<= .cse7 c_~Bn~0) (= (select .cse1 .cse5) (select .cse0 .cse5)) (or .cse9 .cse12) (< 1 c_~Bn~0)))) is different from false [2023-01-28 02:15:27,557 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (+ c_~i_BA~0 1)) (.cse4 (* c_~i_AB~0 4)) (.cse3 (* c_~i_BA~0 4))) (let ((.cse1 (+ c_~A~0.offset .cse3 4)) (.cse9 (forall ((v_ArrVal_1767 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1767) ~B~0.base) (+ ~B~0.offset .cse4)))))) (.cse7 (select |c_#memory_int| c_~A~0.base)) (.cse10 (< .cse5 c_~An~0)) (.cse8 (< .cse5 c_~Bn~0)) (.cse11 (forall ((~B~0.offset Int) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select |c_#memory_int| ~B~0.base) (+ ~B~0.offset .cse4))))))) (and (forall ((v_ArrVal_1767 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1767))) (let ((.cse2 (select .cse0 ~B~0.base))) (or (= (select (select .cse0 c_~A~0.base) .cse1) (select .cse2 (+ .cse3 ~B~0.offset 4))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse2 (+ ~B~0.offset .cse4)))))))) (= c_~i_AB~0 .cse5) (forall ((~B~0.offset Int) (~B~0.base Int)) (let ((.cse6 (select |c_#memory_int| ~B~0.base))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse6 (+ ~B~0.offset .cse4)))) (= (select .cse7 .cse1) (select .cse6 (+ .cse3 ~B~0.offset 4)))))) (or .cse8 .cse9) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| c_~A~0.base)) (or .cse10 .cse9) (< c_~i_BA~0 c_~An~0) (< c_~i_BA~0 c_~Bn~0) (= (select .cse7 (+ c_~A~0.offset .cse3)) (select (select |c_#memory_int| c_~B~0.base) (+ .cse3 c_~B~0.offset))) (or .cse10 .cse11) (or .cse8 .cse11)))) is different from false [2023-01-28 02:15:28,049 INFO L130 PetriNetUnfolder]: 1411/2650 cut-off events. [2023-01-28 02:15:28,049 INFO L131 PetriNetUnfolder]: For 111176/111176 co-relation queries the response was YES. [2023-01-28 02:15:28,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25533 conditions, 2650 events. 1411/2650 cut-off events. For 111176/111176 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16299 event pairs, 243 based on Foata normal form. 33/2683 useless extension candidates. Maximal degree in co-relation 25414. Up to 2201 conditions per place. [2023-01-28 02:15:28,074 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 284 selfloop transitions, 104 changer transitions 8/396 dead transitions. [2023-01-28 02:15:28,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 396 transitions, 6530 flow [2023-01-28 02:15:28,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-28 02:15:28,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-28 02:15:28,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2214 transitions. [2023-01-28 02:15:28,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2733333333333333 [2023-01-28 02:15:28,119 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2214 transitions. [2023-01-28 02:15:28,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2214 transitions. [2023-01-28 02:15:28,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:15:28,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2214 transitions. [2023-01-28 02:15:28,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 88.56) internal successors, (2214), 25 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:28,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 324.0) internal successors, (8424), 26 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:28,127 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 324.0) internal successors, (8424), 26 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:28,127 INFO L175 Difference]: Start difference. First operand has 266 places, 304 transitions, 4515 flow. Second operand 25 states and 2214 transitions. [2023-01-28 02:15:28,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 396 transitions, 6530 flow [2023-01-28 02:15:28,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 396 transitions, 6197 flow, removed 14 selfloop flow, removed 19 redundant places. [2023-01-28 02:15:28,320 INFO L231 Difference]: Finished difference. Result has 279 places, 334 transitions, 5121 flow [2023-01-28 02:15:28,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4285, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5121, PETRI_PLACES=279, PETRI_TRANSITIONS=334} [2023-01-28 02:15:28,320 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 258 predicate places. [2023-01-28 02:15:28,320 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 334 transitions, 5121 flow [2023-01-28 02:15:28,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 86.0) internal successors, (2322), 27 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:28,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:15:28,321 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:15:28,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-01-28 02:15:28,521 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,SelfDestructingSolverStorable43 [2023-01-28 02:15:28,521 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:15:28,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:15:28,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1268623832, now seen corresponding path program 19 times [2023-01-28 02:15:28,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:15:28,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733873494] [2023-01-28 02:15:28,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:15:28,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:15:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:15:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:15:28,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:15:28,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733873494] [2023-01-28 02:15:28,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733873494] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:15:28,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832524240] [2023-01-28 02:15:28,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 02:15:28,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:15:28,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:15:28,956 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) [2023-01-28 02:15:28,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-01-28 02:15:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:15:29,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 02:15:29,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:15:29,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:15:29,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 02:15:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:15:29,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:15:30,193 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~i_AB~0 4))) (let ((.cse4 (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_1814 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1814) ~B~0.base) (+ ~B~0.offset .cse1)) |c_thread1Thread1of1ForFork1_#t~mem1|)))) (.cse5 (+ c_~i_BA~0 1))) (and (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_1814 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1814))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (not (= (select .cse0 (+ ~B~0.offset .cse1)) |c_thread1Thread1of1ForFork1_#t~mem1|)) (let ((.cse3 (* c_~i_BA~0 4))) (= (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse3 4)) (select .cse0 (+ .cse3 ~B~0.offset 4)))))))) (or .cse4 (< .cse5 c_~An~0)) (or .cse4 (< .cse5 c_~Bn~0))))) is different from false [2023-01-28 02:15:30,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:15:30,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2023-01-28 02:15:30,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-01-28 02:15:30,254 INFO L321 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-01-28 02:15:30,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 161 [2023-01-28 02:15:30,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:15:30,271 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 94 treesize of output 95 [2023-01-28 02:15:30,498 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 02:15:30,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2023-01-28 02:15:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:15:30,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832524240] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:15:30,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:15:30,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 35 [2023-01-28 02:15:30,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506934981] [2023-01-28 02:15:30,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:15:30,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-01-28 02:15:30,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:15:30,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-01-28 02:15:30,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1075, Unknown=1, NotChecked=66, Total=1260 [2023-01-28 02:15:30,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 324 [2023-01-28 02:15:30,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 334 transitions, 5121 flow. Second operand has 36 states, 36 states have (on average 85.55555555555556) internal successors, (3080), 36 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:30,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:15:30,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 324 [2023-01-28 02:15:30,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:15:32,018 INFO L130 PetriNetUnfolder]: 1399/2627 cut-off events. [2023-01-28 02:15:32,018 INFO L131 PetriNetUnfolder]: For 118631/118631 co-relation queries the response was YES. [2023-01-28 02:15:32,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26083 conditions, 2627 events. 1399/2627 cut-off events. For 118631/118631 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16035 event pairs, 281 based on Foata normal form. 2/2629 useless extension candidates. Maximal degree in co-relation 25958. Up to 2519 conditions per place. [2023-01-28 02:15:32,049 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 293 selfloop transitions, 48 changer transitions 3/344 dead transitions. [2023-01-28 02:15:32,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 344 transitions, 5885 flow [2023-01-28 02:15:32,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 02:15:32,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 02:15:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1225 transitions. [2023-01-28 02:15:32,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2700617283950617 [2023-01-28 02:15:32,051 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1225 transitions. [2023-01-28 02:15:32,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1225 transitions. [2023-01-28 02:15:32,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:15:32,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1225 transitions. [2023-01-28 02:15:32,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 87.5) internal successors, (1225), 14 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:32,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:32,054 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:32,054 INFO L175 Difference]: Start difference. First operand has 279 places, 334 transitions, 5121 flow. Second operand 14 states and 1225 transitions. [2023-01-28 02:15:32,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 344 transitions, 5885 flow [2023-01-28 02:15:32,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 344 transitions, 5761 flow, removed 13 selfloop flow, removed 11 redundant places. [2023-01-28 02:15:32,294 INFO L231 Difference]: Finished difference. Result has 281 places, 332 transitions, 5061 flow [2023-01-28 02:15:32,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4975, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5061, PETRI_PLACES=281, PETRI_TRANSITIONS=332} [2023-01-28 02:15:32,294 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 260 predicate places. [2023-01-28 02:15:32,295 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 332 transitions, 5061 flow [2023-01-28 02:15:32,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 85.55555555555556) internal successors, (3080), 36 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:32,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:15:32,295 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:15:32,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-01-28 02:15:32,495 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,SelfDestructingSolverStorable44 [2023-01-28 02:15:32,496 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:15:32,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:15:32,496 INFO L85 PathProgramCache]: Analyzing trace with hash 654676370, now seen corresponding path program 20 times [2023-01-28 02:15:32,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:15:32,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111224262] [2023-01-28 02:15:32,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:15:32,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:15:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:15:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:15:32,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:15:32,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111224262] [2023-01-28 02:15:32,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111224262] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:15:32,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516216074] [2023-01-28 02:15:32,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:15:32,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:15:32,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:15:32,586 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) [2023-01-28 02:15:32,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-01-28 02:15:32,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:15:32,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:15:32,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 02:15:32,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:15:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:15:32,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:15:32,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:15:32,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516216074] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:15:32,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:15:32,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3] total 8 [2023-01-28 02:15:32,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677801124] [2023-01-28 02:15:32,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:15:32,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 02:15:32,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:15:32,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 02:15:32,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-01-28 02:15:32,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 324 [2023-01-28 02:15:32,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 332 transitions, 5061 flow. Second operand has 10 states, 10 states have (on average 138.3) internal successors, (1383), 10 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:32,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:15:32,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 324 [2023-01-28 02:15:32,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:15:33,668 INFO L130 PetriNetUnfolder]: 1745/3280 cut-off events. [2023-01-28 02:15:33,668 INFO L131 PetriNetUnfolder]: For 147613/147613 co-relation queries the response was YES. [2023-01-28 02:15:33,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32318 conditions, 3280 events. 1745/3280 cut-off events. For 147613/147613 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21112 event pairs, 264 based on Foata normal form. 5/3285 useless extension candidates. Maximal degree in co-relation 32193. Up to 2161 conditions per place. [2023-01-28 02:15:33,698 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 293 selfloop transitions, 117 changer transitions 2/412 dead transitions. [2023-01-28 02:15:33,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 412 transitions, 7089 flow [2023-01-28 02:15:33,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 02:15:33,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 02:15:33,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1433 transitions. [2023-01-28 02:15:33,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422839506172839 [2023-01-28 02:15:33,700 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1433 transitions. [2023-01-28 02:15:33,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1433 transitions. [2023-01-28 02:15:33,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:15:33,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1433 transitions. [2023-01-28 02:15:33,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 143.3) internal successors, (1433), 10 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:33,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:33,703 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:33,703 INFO L175 Difference]: Start difference. First operand has 281 places, 332 transitions, 5061 flow. Second operand 10 states and 1433 transitions. [2023-01-28 02:15:33,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 412 transitions, 7089 flow [2023-01-28 02:15:33,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 412 transitions, 6963 flow, removed 1 selfloop flow, removed 16 redundant places. [2023-01-28 02:15:33,989 INFO L231 Difference]: Finished difference. Result has 276 places, 359 transitions, 5788 flow [2023-01-28 02:15:33,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4935, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5788, PETRI_PLACES=276, PETRI_TRANSITIONS=359} [2023-01-28 02:15:33,990 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 255 predicate places. [2023-01-28 02:15:33,990 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 359 transitions, 5788 flow [2023-01-28 02:15:33,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 138.3) internal successors, (1383), 10 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:33,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:15:33,990 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:15:33,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-01-28 02:15:34,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-01-28 02:15:34,197 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:15:34,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:15:34,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1667538898, now seen corresponding path program 21 times [2023-01-28 02:15:34,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:15:34,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527487476] [2023-01-28 02:15:34,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:15:34,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:15:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:15:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:15:34,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:15:34,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527487476] [2023-01-28 02:15:34,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527487476] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:15:34,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018048027] [2023-01-28 02:15:34,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:15:34,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:15:34,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:15:34,282 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:15:34,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-01-28 02:15:34,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 02:15:34,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:15:34,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 02:15:34,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:15:34,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:15:34,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:15:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:15:35,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018048027] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:15:35,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:15:35,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 11] total 25 [2023-01-28 02:15:35,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156656453] [2023-01-28 02:15:35,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:15:35,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 02:15:35,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:15:35,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 02:15:35,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2023-01-28 02:15:35,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 324 [2023-01-28 02:15:35,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 359 transitions, 5788 flow. Second operand has 27 states, 27 states have (on average 108.33333333333333) internal successors, (2925), 27 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:35,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:15:35,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 324 [2023-01-28 02:15:35,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:15:36,785 INFO L130 PetriNetUnfolder]: 2031/3822 cut-off events. [2023-01-28 02:15:36,785 INFO L131 PetriNetUnfolder]: For 187033/187033 co-relation queries the response was YES. [2023-01-28 02:15:36,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39581 conditions, 3822 events. 2031/3822 cut-off events. For 187033/187033 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25655 event pairs, 128 based on Foata normal form. 18/3840 useless extension candidates. Maximal degree in co-relation 39457. Up to 1339 conditions per place. [2023-01-28 02:15:36,821 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 280 selfloop transitions, 239 changer transitions 6/525 dead transitions. [2023-01-28 02:15:36,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 525 transitions, 9574 flow [2023-01-28 02:15:36,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 02:15:36,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 02:15:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2463 transitions. [2023-01-28 02:15:36,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34553872053872053 [2023-01-28 02:15:36,823 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2463 transitions. [2023-01-28 02:15:36,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2463 transitions. [2023-01-28 02:15:36,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:15:36,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2463 transitions. [2023-01-28 02:15:36,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 111.95454545454545) internal successors, (2463), 22 states have internal predecessors, (2463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:36,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:36,829 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:36,829 INFO L175 Difference]: Start difference. First operand has 276 places, 359 transitions, 5788 flow. Second operand 22 states and 2463 transitions. [2023-01-28 02:15:36,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 525 transitions, 9574 flow [2023-01-28 02:15:37,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 525 transitions, 9154 flow, removed 191 selfloop flow, removed 2 redundant places. [2023-01-28 02:15:37,242 INFO L231 Difference]: Finished difference. Result has 303 places, 409 transitions, 7261 flow [2023-01-28 02:15:37,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=5530, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7261, PETRI_PLACES=303, PETRI_TRANSITIONS=409} [2023-01-28 02:15:37,242 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 282 predicate places. [2023-01-28 02:15:37,242 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 409 transitions, 7261 flow [2023-01-28 02:15:37,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 108.33333333333333) internal successors, (2925), 27 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:37,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:15:37,243 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:15:37,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-01-28 02:15:37,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-01-28 02:15:37,443 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:15:37,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:15:37,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1628592980, now seen corresponding path program 22 times [2023-01-28 02:15:37,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:15:37,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557971763] [2023-01-28 02:15:37,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:15:37,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:15:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:15:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:15:37,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:15:37,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557971763] [2023-01-28 02:15:37,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557971763] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:15:37,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433863531] [2023-01-28 02:15:37,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:15:37,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:15:37,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:15:37,527 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:15:37,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-01-28 02:15:37,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:15:37,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:15:37,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-28 02:15:37,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:15:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:15:37,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:15:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 02:15:37,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433863531] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:15:37,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:15:37,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 14 [2023-01-28 02:15:37,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054469682] [2023-01-28 02:15:37,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:15:37,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 02:15:37,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:15:37,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 02:15:37,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-01-28 02:15:37,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 324 [2023-01-28 02:15:37,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 409 transitions, 7261 flow. Second operand has 16 states, 16 states have (on average 131.5625) internal successors, (2105), 16 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:37,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:15:37,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 324 [2023-01-28 02:15:37,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:15:39,358 INFO L130 PetriNetUnfolder]: 2517/4780 cut-off events. [2023-01-28 02:15:39,358 INFO L131 PetriNetUnfolder]: For 270782/270782 co-relation queries the response was YES. [2023-01-28 02:15:39,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52626 conditions, 4780 events. 2517/4780 cut-off events. For 270782/270782 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 33917 event pairs, 262 based on Foata normal form. 123/4903 useless extension candidates. Maximal degree in co-relation 52491. Up to 1815 conditions per place. [2023-01-28 02:15:39,416 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 329 selfloop transitions, 275 changer transitions 25/629 dead transitions. [2023-01-28 02:15:39,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 629 transitions, 12528 flow [2023-01-28 02:15:39,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 02:15:39,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 02:15:39,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3673 transitions. [2023-01-28 02:15:39,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41986739826246 [2023-01-28 02:15:39,420 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3673 transitions. [2023-01-28 02:15:39,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3673 transitions. [2023-01-28 02:15:39,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:15:39,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3673 transitions. [2023-01-28 02:15:39,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 136.03703703703704) internal successors, (3673), 27 states have internal predecessors, (3673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:39,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 324.0) internal successors, (9072), 28 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:39,427 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 324.0) internal successors, (9072), 28 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:39,427 INFO L175 Difference]: Start difference. First operand has 303 places, 409 transitions, 7261 flow. Second operand 27 states and 3673 transitions. [2023-01-28 02:15:39,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 629 transitions, 12528 flow [2023-01-28 02:15:40,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 629 transitions, 12040 flow, removed 189 selfloop flow, removed 11 redundant places. [2023-01-28 02:15:40,147 INFO L231 Difference]: Finished difference. Result has 329 places, 460 transitions, 9076 flow [2023-01-28 02:15:40,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=6662, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=9076, PETRI_PLACES=329, PETRI_TRANSITIONS=460} [2023-01-28 02:15:40,147 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 308 predicate places. [2023-01-28 02:15:40,147 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 460 transitions, 9076 flow [2023-01-28 02:15:40,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 131.5625) internal successors, (2105), 16 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:40,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:15:40,148 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:15:40,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-01-28 02:15:40,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:15:40,353 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:15:40,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:15:40,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1095367968, now seen corresponding path program 23 times [2023-01-28 02:15:40,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:15:40,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221756387] [2023-01-28 02:15:40,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:15:40,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:15:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:15:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:15:40,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:15:40,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221756387] [2023-01-28 02:15:40,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221756387] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:15:40,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888191483] [2023-01-28 02:15:40,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:15:40,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:15:40,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:15:40,449 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:15:40,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-01-28 02:15:40,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 02:15:40,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:15:40,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 02:15:40,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:15:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:15:40,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:15:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 02:15:40,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888191483] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:15:40,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:15:40,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3] total 8 [2023-01-28 02:15:40,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603934370] [2023-01-28 02:15:40,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:15:40,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 02:15:40,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:15:40,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 02:15:40,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-01-28 02:15:40,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 324 [2023-01-28 02:15:40,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 460 transitions, 9076 flow. Second operand has 10 states, 10 states have (on average 138.3) internal successors, (1383), 10 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:40,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:15:40,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 324 [2023-01-28 02:15:40,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:15:42,234 INFO L130 PetriNetUnfolder]: 2918/5533 cut-off events. [2023-01-28 02:15:42,234 INFO L131 PetriNetUnfolder]: For 329776/329776 co-relation queries the response was YES. [2023-01-28 02:15:42,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63586 conditions, 5533 events. 2918/5533 cut-off events. For 329776/329776 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 40182 event pairs, 634 based on Foata normal form. 9/5542 useless extension candidates. Maximal degree in co-relation 63443. Up to 3804 conditions per place. [2023-01-28 02:15:42,295 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 411 selfloop transitions, 163 changer transitions 8/582 dead transitions. [2023-01-28 02:15:42,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 582 transitions, 12832 flow [2023-01-28 02:15:42,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 02:15:42,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 02:15:42,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1423 transitions. [2023-01-28 02:15:42,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43919753086419755 [2023-01-28 02:15:42,297 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1423 transitions. [2023-01-28 02:15:42,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1423 transitions. [2023-01-28 02:15:42,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:15:42,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1423 transitions. [2023-01-28 02:15:42,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 142.3) internal successors, (1423), 10 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:42,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:42,300 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:42,300 INFO L175 Difference]: Start difference. First operand has 329 places, 460 transitions, 9076 flow. Second operand 10 states and 1423 transitions. [2023-01-28 02:15:42,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 582 transitions, 12832 flow [2023-01-28 02:15:43,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 582 transitions, 11684 flow, removed 543 selfloop flow, removed 7 redundant places. [2023-01-28 02:15:43,122 INFO L231 Difference]: Finished difference. Result has 332 places, 511 transitions, 10090 flow [2023-01-28 02:15:43,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=8354, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10090, PETRI_PLACES=332, PETRI_TRANSITIONS=511} [2023-01-28 02:15:43,123 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 311 predicate places. [2023-01-28 02:15:43,123 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 511 transitions, 10090 flow [2023-01-28 02:15:43,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 138.3) internal successors, (1383), 10 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:43,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:15:43,123 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:15:43,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-01-28 02:15:43,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-01-28 02:15:43,324 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:15:43,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:15:43,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1359474198, now seen corresponding path program 12 times [2023-01-28 02:15:43,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:15:43,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695195118] [2023-01-28 02:15:43,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:15:43,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:15:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:15:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 02:15:43,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:15:43,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695195118] [2023-01-28 02:15:43,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695195118] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:15:43,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529304219] [2023-01-28 02:15:43,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:15:43,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:15:43,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:15:43,405 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:15:43,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-01-28 02:15:43,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 02:15:43,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:15:43,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 02:15:43,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:15:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 02:15:43,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:15:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 02:15:43,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529304219] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:15:43,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:15:43,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 02:15:43,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674737991] [2023-01-28 02:15:43,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:15:43,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 02:15:43,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:15:43,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 02:15:43,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-01-28 02:15:43,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-01-28 02:15:43,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 511 transitions, 10090 flow. Second operand has 18 states, 18 states have (on average 116.61111111111111) internal successors, (2099), 18 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:43,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:15:43,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-01-28 02:15:43,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:15:45,238 INFO L130 PetriNetUnfolder]: 2744/5252 cut-off events. [2023-01-28 02:15:45,238 INFO L131 PetriNetUnfolder]: For 286636/286636 co-relation queries the response was YES. [2023-01-28 02:15:45,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58350 conditions, 5252 events. 2744/5252 cut-off events. For 286636/286636 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 37419 event pairs, 1363 based on Foata normal form. 107/5359 useless extension candidates. Maximal degree in co-relation 58205. Up to 4508 conditions per place. [2023-01-28 02:15:45,342 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 469 selfloop transitions, 23 changer transitions 56/548 dead transitions. [2023-01-28 02:15:45,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 548 transitions, 11582 flow [2023-01-28 02:15:45,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 02:15:45,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 02:15:45,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 963 transitions. [2023-01-28 02:15:45,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3715277777777778 [2023-01-28 02:15:45,343 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 963 transitions. [2023-01-28 02:15:45,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 963 transitions. [2023-01-28 02:15:45,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:15:45,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 963 transitions. [2023-01-28 02:15:45,344 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) [2023-01-28 02:15:45,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:45,346 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:45,346 INFO L175 Difference]: Start difference. First operand has 332 places, 511 transitions, 10090 flow. Second operand 8 states and 963 transitions. [2023-01-28 02:15:45,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 548 transitions, 11582 flow [2023-01-28 02:15:46,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 548 transitions, 11225 flow, removed 99 selfloop flow, removed 10 redundant places. [2023-01-28 02:15:46,119 INFO L231 Difference]: Finished difference. Result has 328 places, 445 transitions, 8536 flow [2023-01-28 02:15:46,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=8334, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8536, PETRI_PLACES=328, PETRI_TRANSITIONS=445} [2023-01-28 02:15:46,119 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 307 predicate places. [2023-01-28 02:15:46,119 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 445 transitions, 8536 flow [2023-01-28 02:15:46,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 116.61111111111111) internal successors, (2099), 18 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:46,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:15:46,120 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:15:46,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-01-28 02:15:46,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-01-28 02:15:46,328 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:15:46,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:15:46,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1159595898, now seen corresponding path program 24 times [2023-01-28 02:15:46,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:15:46,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975130039] [2023-01-28 02:15:46,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:15:46,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:15:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:15:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 02:15:46,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:15:46,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975130039] [2023-01-28 02:15:46,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975130039] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:15:46,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530619767] [2023-01-28 02:15:46,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:15:46,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:15:46,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:15:46,417 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:15:46,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-01-28 02:15:46,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 02:15:46,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:15:46,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 02:15:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:15:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 02:15:46,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:15:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 02:15:46,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530619767] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:15:46,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:15:46,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2023-01-28 02:15:46,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339929057] [2023-01-28 02:15:46,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:15:46,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 02:15:46,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:15:46,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 02:15:46,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-01-28 02:15:46,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 324 [2023-01-28 02:15:46,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 445 transitions, 8536 flow. Second operand has 21 states, 21 states have (on average 113.61904761904762) internal successors, (2386), 21 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:46,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:15:46,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 324 [2023-01-28 02:15:46,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:15:48,958 INFO L130 PetriNetUnfolder]: 3680/7195 cut-off events. [2023-01-28 02:15:48,958 INFO L131 PetriNetUnfolder]: For 357197/357197 co-relation queries the response was YES. [2023-01-28 02:15:49,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75827 conditions, 7195 events. 3680/7195 cut-off events. For 357197/357197 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 55394 event pairs, 866 based on Foata normal form. 286/7481 useless extension candidates. Maximal degree in co-relation 75683. Up to 4127 conditions per place. [2023-01-28 02:15:49,037 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 488 selfloop transitions, 96 changer transitions 216/800 dead transitions. [2023-01-28 02:15:49,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 800 transitions, 15998 flow [2023-01-28 02:15:49,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 02:15:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 02:15:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2457 transitions. [2023-01-28 02:15:49,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3611111111111111 [2023-01-28 02:15:49,039 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2457 transitions. [2023-01-28 02:15:49,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2457 transitions. [2023-01-28 02:15:49,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:15:49,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2457 transitions. [2023-01-28 02:15:49,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 117.0) internal successors, (2457), 21 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:49,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 324.0) internal successors, (7128), 22 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:49,045 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 324.0) internal successors, (7128), 22 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:49,045 INFO L175 Difference]: Start difference. First operand has 328 places, 445 transitions, 8536 flow. Second operand 21 states and 2457 transitions. [2023-01-28 02:15:49,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 800 transitions, 15998 flow [2023-01-28 02:15:50,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 800 transitions, 15867 flow, removed 49 selfloop flow, removed 8 redundant places. [2023-01-28 02:15:50,576 INFO L231 Difference]: Finished difference. Result has 345 places, 462 transitions, 9112 flow [2023-01-28 02:15:50,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=8331, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9112, PETRI_PLACES=345, PETRI_TRANSITIONS=462} [2023-01-28 02:15:50,577 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 324 predicate places. [2023-01-28 02:15:50,577 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 462 transitions, 9112 flow [2023-01-28 02:15:50,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 113.61904761904762) internal successors, (2386), 21 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:50,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:15:50,577 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:15:50,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-01-28 02:15:50,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-01-28 02:15:50,778 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:15:50,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:15:50,778 INFO L85 PathProgramCache]: Analyzing trace with hash -631102909, now seen corresponding path program 13 times [2023-01-28 02:15:50,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:15:50,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088154837] [2023-01-28 02:15:50,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:15:50,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:15:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:15:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:15:50,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:15:50,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088154837] [2023-01-28 02:15:50,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088154837] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:15:50,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997338898] [2023-01-28 02:15:50,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 02:15:50,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:15:50,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:15:50,863 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:15:50,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-01-28 02:15:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:15:50,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 02:15:50,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:15:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:15:51,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:15:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:15:51,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997338898] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:15:51,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:15:51,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-01-28 02:15:51,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003691048] [2023-01-28 02:15:51,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:15:51,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 02:15:51,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:15:51,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 02:15:51,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2023-01-28 02:15:51,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-01-28 02:15:51,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 462 transitions, 9112 flow. Second operand has 20 states, 20 states have (on average 116.25) internal successors, (2325), 20 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:51,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:15:51,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-01-28 02:15:51,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:15:52,559 INFO L130 PetriNetUnfolder]: 2618/4968 cut-off events. [2023-01-28 02:15:52,560 INFO L131 PetriNetUnfolder]: For 266319/266319 co-relation queries the response was YES. [2023-01-28 02:15:52,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54535 conditions, 4968 events. 2618/4968 cut-off events. For 266319/266319 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 34642 event pairs, 680 based on Foata normal form. 49/5017 useless extension candidates. Maximal degree in co-relation 54386. Up to 4408 conditions per place. [2023-01-28 02:15:52,627 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 395 selfloop transitions, 17 changer transitions 98/510 dead transitions. [2023-01-28 02:15:52,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 510 transitions, 10862 flow [2023-01-28 02:15:52,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 02:15:52,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 02:15:52,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1195 transitions. [2023-01-28 02:15:52,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36882716049382713 [2023-01-28 02:15:52,629 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1195 transitions. [2023-01-28 02:15:52,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1195 transitions. [2023-01-28 02:15:52,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:15:52,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1195 transitions. [2023-01-28 02:15:52,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 119.5) internal successors, (1195), 10 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:52,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:52,631 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:52,632 INFO L175 Difference]: Start difference. First operand has 345 places, 462 transitions, 9112 flow. Second operand 10 states and 1195 transitions. [2023-01-28 02:15:52,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 510 transitions, 10862 flow [2023-01-28 02:15:53,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 510 transitions, 10500 flow, removed 131 selfloop flow, removed 20 redundant places. [2023-01-28 02:15:53,628 INFO L231 Difference]: Finished difference. Result has 313 places, 408 transitions, 7745 flow [2023-01-28 02:15:53,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=8288, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7745, PETRI_PLACES=313, PETRI_TRANSITIONS=408} [2023-01-28 02:15:53,629 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 292 predicate places. [2023-01-28 02:15:53,629 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 408 transitions, 7745 flow [2023-01-28 02:15:53,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 116.25) internal successors, (2325), 20 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:53,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:15:53,629 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:15:53,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-01-28 02:15:53,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:15:53,837 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:15:53,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:15:53,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1198980961, now seen corresponding path program 14 times [2023-01-28 02:15:53,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:15:53,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275854686] [2023-01-28 02:15:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:15:53,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:15:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:15:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:15:54,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:15:54,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275854686] [2023-01-28 02:15:54,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275854686] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:15:54,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943095232] [2023-01-28 02:15:54,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:15:54,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:15:54,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:15:54,430 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:15:54,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-01-28 02:15:54,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:15:54,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:15:54,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 02:15:54,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:15:55,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:15:55,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 02:15:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:15:55,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:15:55,516 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* c_~i_AB~0 4))) (let ((.cse0 (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_2195 (Array Int Int))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2195) ~B~0.base) (+ ~B~0.offset .cse5)))))) (.cse1 (+ c_~i_BA~0 1))) (and (or .cse0 (< .cse1 c_~An~0)) (or .cse0 (< .cse1 c_~Bn~0)) (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_2195 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2195))) (let ((.cse4 (select .cse2 ~B~0.base))) (or (let ((.cse3 (* c_~i_BA~0 4))) (= (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse3 4)) (select .cse4 (+ .cse3 ~B~0.offset 4)))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse4 (+ ~B~0.offset .cse5))))))))))) is different from false [2023-01-28 02:15:55,565 INFO L321 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-01-28 02:15:55,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 161 [2023-01-28 02:15:55,583 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:15:55,583 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 94 treesize of output 95 [2023-01-28 02:15:55,866 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 02:15:55,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2023-01-28 02:15:55,875 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 02:15:55,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2023-01-28 02:15:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:15:56,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943095232] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:15:56,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:15:56,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 42 [2023-01-28 02:15:56,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635441731] [2023-01-28 02:15:56,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:15:56,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-01-28 02:15:56,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:15:56,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-01-28 02:15:56,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1543, Unknown=1, NotChecked=80, Total=1806 [2023-01-28 02:15:56,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 324 [2023-01-28 02:15:56,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 408 transitions, 7745 flow. Second operand has 43 states, 43 states have (on average 85.55813953488372) internal successors, (3679), 43 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:15:56,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:15:56,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 324 [2023-01-28 02:15:56,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:15:59,888 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] [2023-01-28 02:16:03,525 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] [2023-01-28 02:16:04,789 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse8 (* c_~i_BA~0 4)) (.cse2 (+ c_~i_BA~0 1)) (.cse6 (* c_~i_AB~0 4))) (let ((.cse9 (+ c_~i_BA~0 2)) (.cse3 (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_2195 (Array Int Int))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2195) ~B~0.base) (+ ~B~0.offset .cse6)))))) (.cse4 (< .cse2 c_~An~0)) (.cse1 (select |c_#memory_int| c_~B~0.base)) (.cse0 (select |c_#memory_int| c_~A~0.base)) (.cse7 (+ c_~A~0.offset .cse8 4)) (.cse10 (< .cse2 c_~Bn~0)) (.cse11 (forall ((~B~0.offset Int) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select |c_#memory_int| ~B~0.base) (+ ~B~0.offset .cse6))))))) (and (= (select .cse0 4) (select .cse1 (+ 4 c_~B~0.offset))) (= c_~i_AB~0 .cse2) (or .cse3 .cse4) (forall ((~B~0.offset Int) (~B~0.base Int)) (let ((.cse5 (select |c_#memory_int| ~B~0.base))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse5 (+ ~B~0.offset .cse6)))) (= (select .cse0 .cse7) (select .cse5 (+ .cse8 ~B~0.offset 4)))))) (<= .cse9 c_~Bn~0) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| c_~A~0.base)) .cse4 (= c_~i_BA~0 1) (<= .cse9 c_~An~0) (<= 3 c_~An~0) (or .cse3 .cse10) .cse10 (= c_~B~0.offset 0) (or .cse4 .cse11) (= c_~A~0.offset 0) (= (select .cse1 .cse8) (select .cse0 .cse8)) (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_2195 (Array Int Int))) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2195))) (let ((.cse13 (select .cse12 ~B~0.base))) (or (= (select (select .cse12 c_~A~0.base) .cse7) (select .cse13 (+ .cse8 ~B~0.offset 4))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse13 (+ ~B~0.offset .cse6)))))))) (or .cse10 .cse11) (<= 3 c_~Bn~0)))) is different from false [2023-01-28 02:16:11,379 WARN L222 SmtUtils]: Spent 6.50s on a formula simplification. DAG size of input: 60 DAG size of output: 53 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 02:16:13,517 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] [2023-01-28 02:16:14,880 INFO L130 PetriNetUnfolder]: 2469/4639 cut-off events. [2023-01-28 02:16:14,880 INFO L131 PetriNetUnfolder]: For 244891/244891 co-relation queries the response was YES. [2023-01-28 02:16:14,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50151 conditions, 4639 events. 2469/4639 cut-off events. For 244891/244891 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 32020 event pairs, 578 based on Foata normal form. 10/4649 useless extension candidates. Maximal degree in co-relation 50013. Up to 4196 conditions per place. [2023-01-28 02:16:15,039 INFO L137 encePairwiseOnDemand]: 310/324 looper letters, 371 selfloop transitions, 93 changer transitions 7/471 dead transitions. [2023-01-28 02:16:15,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 471 transitions, 9510 flow [2023-01-28 02:16:15,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 02:16:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 02:16:15,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2724 transitions. [2023-01-28 02:16:15,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2712066905615293 [2023-01-28 02:16:15,043 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2724 transitions. [2023-01-28 02:16:15,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2724 transitions. [2023-01-28 02:16:15,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:16:15,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2724 transitions. [2023-01-28 02:16:15,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 87.87096774193549) internal successors, (2724), 31 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:16:15,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 324.0) internal successors, (10368), 32 states have internal predecessors, (10368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:16:15,052 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 324.0) internal successors, (10368), 32 states have internal predecessors, (10368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:16:15,052 INFO L175 Difference]: Start difference. First operand has 313 places, 408 transitions, 7745 flow. Second operand 31 states and 2724 transitions. [2023-01-28 02:16:15,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 471 transitions, 9510 flow [2023-01-28 02:16:15,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 471 transitions, 9307 flow, removed 82 selfloop flow, removed 10 redundant places. [2023-01-28 02:16:15,633 INFO L231 Difference]: Finished difference. Result has 332 places, 415 transitions, 7892 flow [2023-01-28 02:16:15,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=7552, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=7892, PETRI_PLACES=332, PETRI_TRANSITIONS=415} [2023-01-28 02:16:15,634 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 311 predicate places. [2023-01-28 02:16:15,634 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 415 transitions, 7892 flow [2023-01-28 02:16:15,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 85.55813953488372) internal successors, (3679), 43 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:16:15,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:16:15,634 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:16:15,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-01-28 02:16:15,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:16:15,840 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:16:15,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:16:15,841 INFO L85 PathProgramCache]: Analyzing trace with hash 2113999335, now seen corresponding path program 15 times [2023-01-28 02:16:15,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:16:15,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523515028] [2023-01-28 02:16:15,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:16:15,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:16:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:16:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:16:16,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:16:16,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523515028] [2023-01-28 02:16:16,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523515028] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:16:16,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047435868] [2023-01-28 02:16:16,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:16:16,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:16:16,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:16:16,468 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:16:16,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-01-28 02:16:16,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 02:16:16,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:16:16,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-28 02:16:16,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:16:17,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:16:17,168 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 16 treesize of output 18 [2023-01-28 02:16:17,400 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:16:17,403 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-01-28 02:16:17,403 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 53 treesize of output 1 [2023-01-28 02:16:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:16:17,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:16:17,733 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~An~0 (+ c_~i_AB~0 1)) (let ((.cse5 (+ c_~B~0.offset (* c_~i_AB~0 4)))) (let ((.cse0 (+ c_~i_BA~0 1)) (.cse1 (forall ((~B~0.base Int) (v_ArrVal_2250 (Array Int Int))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2250) ~B~0.base) .cse5)))))) (and (or (< .cse0 c_~Bn~0) .cse1) (or (< .cse0 c_~An~0) .cse1) (forall ((~B~0.base Int) (v_ArrVal_2250 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2250))) (let ((.cse2 (select .cse4 ~B~0.base))) (or (let ((.cse3 (* c_~i_BA~0 4))) (= (select .cse2 (+ .cse3 4 c_~B~0.offset)) (select (select .cse4 c_~A~0.base) (+ c_~A~0.offset .cse3 4)))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse2 .cse5)))))))))) (= c_~i_AB~0 c_~i_BA~0)) is different from false [2023-01-28 02:16:17,784 INFO L321 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-01-28 02:16:17,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 161 [2023-01-28 02:16:17,800 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:16:17,800 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 94 treesize of output 95 [2023-01-28 02:16:18,028 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 02:16:18,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2023-01-28 02:16:18,033 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 02:16:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:16:18,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047435868] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:16:18,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:16:18,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 44 [2023-01-28 02:16:18,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491796220] [2023-01-28 02:16:18,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:16:18,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-28 02:16:18,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:16:18,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-28 02:16:18,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1638, Unknown=1, NotChecked=84, Total=1980 [2023-01-28 02:16:18,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 324 [2023-01-28 02:16:18,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 415 transitions, 7892 flow. Second operand has 45 states, 45 states have (on average 85.57777777777778) internal successors, (3851), 45 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:16:18,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:16:18,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 324 [2023-01-28 02:16:18,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:16:49,310 WARN L222 SmtUtils]: Spent 24.60s on a formula simplification. DAG size of input: 107 DAG size of output: 81 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 02:17:06,077 INFO L130 PetriNetUnfolder]: 5538/10352 cut-off events. [2023-01-28 02:17:06,078 INFO L131 PetriNetUnfolder]: For 542047/542047 co-relation queries the response was YES. [2023-01-28 02:17:06,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108975 conditions, 10352 events. 5538/10352 cut-off events. For 542047/542047 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 82298 event pairs, 514 based on Foata normal form. 65/10417 useless extension candidates. Maximal degree in co-relation 108165. Up to 4387 conditions per place. [2023-01-28 02:17:06,367 INFO L137 encePairwiseOnDemand]: 309/324 looper letters, 553 selfloop transitions, 836 changer transitions 35/1424 dead transitions. [2023-01-28 02:17:06,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 1424 transitions, 28071 flow [2023-01-28 02:17:06,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-01-28 02:17:06,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2023-01-28 02:17:06,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 7489 transitions. [2023-01-28 02:17:06,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2751690182245738 [2023-01-28 02:17:06,372 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 7489 transitions. [2023-01-28 02:17:06,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 7489 transitions. [2023-01-28 02:17:06,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:17:06,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 7489 transitions. [2023-01-28 02:17:06,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 89.1547619047619) internal successors, (7489), 84 states have internal predecessors, (7489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:06,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 324.0) internal successors, (27540), 85 states have internal predecessors, (27540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:06,389 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 324.0) internal successors, (27540), 85 states have internal predecessors, (27540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:06,389 INFO L175 Difference]: Start difference. First operand has 332 places, 415 transitions, 7892 flow. Second operand 84 states and 7489 transitions. [2023-01-28 02:17:06,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 1424 transitions, 28071 flow [2023-01-28 02:17:07,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 1424 transitions, 27335 flow, removed 68 selfloop flow, removed 24 redundant places. [2023-01-28 02:17:07,809 INFO L231 Difference]: Finished difference. Result has 420 places, 1154 transitions, 24614 flow [2023-01-28 02:17:07,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=7645, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=24614, PETRI_PLACES=420, PETRI_TRANSITIONS=1154} [2023-01-28 02:17:07,810 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 399 predicate places. [2023-01-28 02:17:07,810 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 1154 transitions, 24614 flow [2023-01-28 02:17:07,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 85.57777777777778) internal successors, (3851), 45 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:07,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:17:07,810 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:17:07,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-01-28 02:17:08,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:17:08,016 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:17:08,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:17:08,016 INFO L85 PathProgramCache]: Analyzing trace with hash -758541815, now seen corresponding path program 25 times [2023-01-28 02:17:08,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:17:08,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461218105] [2023-01-28 02:17:08,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:17:08,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:17:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:17:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:17:08,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:17:08,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461218105] [2023-01-28 02:17:08,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461218105] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:17:08,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419975916] [2023-01-28 02:17:08,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 02:17:08,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:17:08,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:17:08,188 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:17:08,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-01-28 02:17:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:17:08,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-28 02:17:08,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:17:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:17:08,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:17:08,798 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:17:08,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419975916] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:17:08,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:17:08,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-01-28 02:17:08,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81305078] [2023-01-28 02:17:08,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:17:08,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 02:17:08,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:17:08,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 02:17:08,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2023-01-28 02:17:08,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 324 [2023-01-28 02:17:08,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 1154 transitions, 24614 flow. Second operand has 30 states, 30 states have (on average 112.9) internal successors, (3387), 30 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:08,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:17:08,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 324 [2023-01-28 02:17:08,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:17:12,617 INFO L130 PetriNetUnfolder]: 5395/9975 cut-off events. [2023-01-28 02:17:12,618 INFO L131 PetriNetUnfolder]: For 902403/902403 co-relation queries the response was YES. [2023-01-28 02:17:12,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130375 conditions, 9975 events. 5395/9975 cut-off events. For 902403/902403 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 77423 event pairs, 391 based on Foata normal form. 128/10103 useless extension candidates. Maximal degree in co-relation 129505. Up to 3713 conditions per place. [2023-01-28 02:17:12,739 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 957 selfloop transitions, 374 changer transitions 1/1332 dead transitions. [2023-01-28 02:17:12,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 1332 transitions, 30942 flow [2023-01-28 02:17:12,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 02:17:12,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 02:17:12,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1504 transitions. [2023-01-28 02:17:12,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3570750237416904 [2023-01-28 02:17:12,741 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1504 transitions. [2023-01-28 02:17:12,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1504 transitions. [2023-01-28 02:17:12,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:17:12,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1504 transitions. [2023-01-28 02:17:12,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 115.6923076923077) internal successors, (1504), 13 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:12,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:12,744 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:12,744 INFO L175 Difference]: Start difference. First operand has 420 places, 1154 transitions, 24614 flow. Second operand 13 states and 1504 transitions. [2023-01-28 02:17:12,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 1332 transitions, 30942 flow [2023-01-28 02:17:16,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 1332 transitions, 27641 flow, removed 1395 selfloop flow, removed 27 redundant places. [2023-01-28 02:17:16,636 INFO L231 Difference]: Finished difference. Result has 403 places, 1164 transitions, 23495 flow [2023-01-28 02:17:16,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=21571, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=764, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=23495, PETRI_PLACES=403, PETRI_TRANSITIONS=1164} [2023-01-28 02:17:16,637 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 382 predicate places. [2023-01-28 02:17:16,637 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 1164 transitions, 23495 flow [2023-01-28 02:17:16,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 112.9) internal successors, (3387), 30 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:16,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:17:16,637 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:17:16,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-01-28 02:17:16,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-01-28 02:17:16,838 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:17:16,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:17:16,838 INFO L85 PathProgramCache]: Analyzing trace with hash -326833819, now seen corresponding path program 16 times [2023-01-28 02:17:16,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:17:16,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011549795] [2023-01-28 02:17:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:17:16,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:17:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:17:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:17:17,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:17:17,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011549795] [2023-01-28 02:17:17,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011549795] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:17:17,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588032638] [2023-01-28 02:17:17,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:17:17,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:17:17,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:17:17,283 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:17:17,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-01-28 02:17:17,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:17:17,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:17:17,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 02:17:17,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:17:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-28 02:17:17,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:17:17,709 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-28 02:17:17,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-28 02:17:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-28 02:17:17,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588032638] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:17:17,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:17:17,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 27 [2023-01-28 02:17:17,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717766535] [2023-01-28 02:17:17,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:17:17,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 02:17:17,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:17:17,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 02:17:17,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2023-01-28 02:17:17,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 324 [2023-01-28 02:17:17,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 1164 transitions, 23495 flow. Second operand has 28 states, 28 states have (on average 104.17857142857143) internal successors, (2917), 28 states have internal predecessors, (2917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:17,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:17:17,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 324 [2023-01-28 02:17:17,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:17:22,022 INFO L130 PetriNetUnfolder]: 5453/10129 cut-off events. [2023-01-28 02:17:22,023 INFO L131 PetriNetUnfolder]: For 789296/789296 co-relation queries the response was YES. [2023-01-28 02:17:22,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122533 conditions, 10129 events. 5453/10129 cut-off events. For 789296/789296 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 79514 event pairs, 751 based on Foata normal form. 16/10145 useless extension candidates. Maximal degree in co-relation 122369. Up to 7069 conditions per place. [2023-01-28 02:17:22,171 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 879 selfloop transitions, 431 changer transitions 60/1370 dead transitions. [2023-01-28 02:17:22,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1370 transitions, 29479 flow [2023-01-28 02:17:22,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 02:17:22,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 02:17:22,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2061 transitions. [2023-01-28 02:17:22,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3347953216374269 [2023-01-28 02:17:22,173 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2061 transitions. [2023-01-28 02:17:22,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2061 transitions. [2023-01-28 02:17:22,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:17:22,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2061 transitions. [2023-01-28 02:17:22,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 108.47368421052632) internal successors, (2061), 19 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:22,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 324.0) internal successors, (6480), 20 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:22,177 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 324.0) internal successors, (6480), 20 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:22,177 INFO L175 Difference]: Start difference. First operand has 403 places, 1164 transitions, 23495 flow. Second operand 19 states and 2061 transitions. [2023-01-28 02:17:22,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1370 transitions, 29479 flow [2023-01-28 02:17:24,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 1370 transitions, 29345 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-01-28 02:17:24,968 INFO L231 Difference]: Finished difference. Result has 417 places, 1222 transitions, 25328 flow [2023-01-28 02:17:24,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=23361, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=25328, PETRI_PLACES=417, PETRI_TRANSITIONS=1222} [2023-01-28 02:17:24,968 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 396 predicate places. [2023-01-28 02:17:24,969 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 1222 transitions, 25328 flow [2023-01-28 02:17:24,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 104.17857142857143) internal successors, (2917), 28 states have internal predecessors, (2917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:24,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:17:24,969 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:17:24,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-01-28 02:17:25,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-01-28 02:17:25,171 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:17:25,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:17:25,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1977088976, now seen corresponding path program 26 times [2023-01-28 02:17:25,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:17:25,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875776401] [2023-01-28 02:17:25,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:17:25,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:17:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:17:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:17:25,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:17:25,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875776401] [2023-01-28 02:17:25,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875776401] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:17:25,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802559320] [2023-01-28 02:17:25,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:17:25,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:17:25,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:17:25,749 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:17:25,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-01-28 02:17:25,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:17:25,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:17:25,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 02:17:25,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:17:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:17:26,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:17:26,566 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 02:17:26,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 02:17:26,599 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-28 02:17:26,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-28 02:17:26,615 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-28 02:17:26,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-28 02:17:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:17:27,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802559320] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:17:27,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:17:27,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 44 [2023-01-28 02:17:27,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127733560] [2023-01-28 02:17:27,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:17:27,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-28 02:17:27,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:17:27,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-28 02:17:27,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1753, Unknown=0, NotChecked=0, Total=1980 [2023-01-28 02:17:27,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-28 02:17:27,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 1222 transitions, 25328 flow. Second operand has 45 states, 45 states have (on average 89.62222222222222) internal successors, (4033), 45 states have internal predecessors, (4033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:27,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:17:27,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-28 02:17:27,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:17:31,508 INFO L130 PetriNetUnfolder]: 5596/10349 cut-off events. [2023-01-28 02:17:31,509 INFO L131 PetriNetUnfolder]: For 838408/838408 co-relation queries the response was YES. [2023-01-28 02:17:31,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127445 conditions, 10349 events. 5596/10349 cut-off events. For 838408/838408 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 81288 event pairs, 863 based on Foata normal form. 74/10423 useless extension candidates. Maximal degree in co-relation 127275. Up to 8740 conditions per place. [2023-01-28 02:17:31,630 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 1120 selfloop transitions, 235 changer transitions 0/1355 dead transitions. [2023-01-28 02:17:31,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 1355 transitions, 30346 flow [2023-01-28 02:17:31,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 02:17:31,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 02:17:31,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1574 transitions. [2023-01-28 02:17:31,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28576615831517793 [2023-01-28 02:17:31,632 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1574 transitions. [2023-01-28 02:17:31,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1574 transitions. [2023-01-28 02:17:31,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:17:31,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1574 transitions. [2023-01-28 02:17:31,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 92.58823529411765) internal successors, (1574), 17 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:31,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:31,636 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:31,636 INFO L175 Difference]: Start difference. First operand has 417 places, 1222 transitions, 25328 flow. Second operand 17 states and 1574 transitions. [2023-01-28 02:17:31,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 1355 transitions, 30346 flow [2023-01-28 02:17:34,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 1355 transitions, 29735 flow, removed 49 selfloop flow, removed 9 redundant places. [2023-01-28 02:17:34,627 INFO L231 Difference]: Finished difference. Result has 424 places, 1270 transitions, 26399 flow [2023-01-28 02:17:34,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=24721, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=987, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=26399, PETRI_PLACES=424, PETRI_TRANSITIONS=1270} [2023-01-28 02:17:34,628 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 403 predicate places. [2023-01-28 02:17:34,628 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 1270 transitions, 26399 flow [2023-01-28 02:17:34,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 89.62222222222222) internal successors, (4033), 45 states have internal predecessors, (4033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:34,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:17:34,629 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:17:34,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-01-28 02:17:34,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-01-28 02:17:34,835 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:17:34,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:17:34,835 INFO L85 PathProgramCache]: Analyzing trace with hash -725040933, now seen corresponding path program 17 times [2023-01-28 02:17:34,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:17:34,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559005563] [2023-01-28 02:17:34,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:17:34,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:17:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:17:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:17:35,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:17:35,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559005563] [2023-01-28 02:17:35,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559005563] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:17:35,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061773211] [2023-01-28 02:17:35,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:17:35,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:17:35,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:17:35,212 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:17:35,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-01-28 02:17:35,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 02:17:35,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:17:35,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 02:17:35,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:17:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-28 02:17:35,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:17:35,710 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-28 02:17:35,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-28 02:17:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-28 02:17:35,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061773211] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:17:35,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:17:35,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 23 [2023-01-28 02:17:35,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009571228] [2023-01-28 02:17:35,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:17:35,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 02:17:35,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:17:35,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 02:17:35,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2023-01-28 02:17:35,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 324 [2023-01-28 02:17:35,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 1270 transitions, 26399 flow. Second operand has 24 states, 24 states have (on average 104.04166666666667) internal successors, (2497), 24 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:35,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:17:35,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 324 [2023-01-28 02:17:35,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:17:40,496 INFO L130 PetriNetUnfolder]: 5636/10467 cut-off events. [2023-01-28 02:17:40,496 INFO L131 PetriNetUnfolder]: For 854568/854568 co-relation queries the response was YES. [2023-01-28 02:17:40,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130267 conditions, 10467 events. 5636/10467 cut-off events. For 854568/854568 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 82822 event pairs, 811 based on Foata normal form. 28/10495 useless extension candidates. Maximal degree in co-relation 130094. Up to 7590 conditions per place. [2023-01-28 02:17:40,626 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 885 selfloop transitions, 480 changer transitions 34/1399 dead transitions. [2023-01-28 02:17:40,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 1399 transitions, 31577 flow [2023-01-28 02:17:40,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 02:17:40,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 02:17:40,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2164 transitions. [2023-01-28 02:17:40,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3339506172839506 [2023-01-28 02:17:40,628 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2164 transitions. [2023-01-28 02:17:40,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2164 transitions. [2023-01-28 02:17:40,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:17:40,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2164 transitions. [2023-01-28 02:17:40,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 108.2) internal successors, (2164), 20 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:40,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:40,633 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:40,633 INFO L175 Difference]: Start difference. First operand has 424 places, 1270 transitions, 26399 flow. Second operand 20 states and 2164 transitions. [2023-01-28 02:17:40,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 1399 transitions, 31577 flow [2023-01-28 02:17:43,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 1399 transitions, 31035 flow, removed 148 selfloop flow, removed 13 redundant places. [2023-01-28 02:17:43,663 INFO L231 Difference]: Finished difference. Result has 433 places, 1295 transitions, 27652 flow [2023-01-28 02:17:43,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=25857, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=807, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=27652, PETRI_PLACES=433, PETRI_TRANSITIONS=1295} [2023-01-28 02:17:43,664 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 412 predicate places. [2023-01-28 02:17:43,664 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 1295 transitions, 27652 flow [2023-01-28 02:17:43,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 104.04166666666667) internal successors, (2497), 24 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:43,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:17:43,665 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:17:43,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-01-28 02:17:43,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-01-28 02:17:43,865 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:17:43,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:17:43,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1588312397, now seen corresponding path program 18 times [2023-01-28 02:17:43,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:17:43,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664354117] [2023-01-28 02:17:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:17:43,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:17:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:17:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:17:44,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:17:44,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664354117] [2023-01-28 02:17:44,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664354117] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:17:44,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972112402] [2023-01-28 02:17:44,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:17:44,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:17:44,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:17:44,304 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:17:44,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-01-28 02:17:44,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 02:17:44,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:17:44,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 02:17:44,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:17:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-28 02:17:44,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:17:44,907 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-28 02:17:44,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-28 02:17:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-28 02:17:44,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972112402] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:17:44,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:17:44,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 28 [2023-01-28 02:17:44,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78610351] [2023-01-28 02:17:44,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:17:44,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 02:17:44,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:17:44,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 02:17:44,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2023-01-28 02:17:44,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 324 [2023-01-28 02:17:44,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 1295 transitions, 27652 flow. Second operand has 29 states, 29 states have (on average 104.10344827586206) internal successors, (3019), 29 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:44,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:17:44,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 324 [2023-01-28 02:17:44,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:17:50,355 INFO L130 PetriNetUnfolder]: 5601/10368 cut-off events. [2023-01-28 02:17:50,356 INFO L131 PetriNetUnfolder]: For 854985/854985 co-relation queries the response was YES. [2023-01-28 02:17:50,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131519 conditions, 10368 events. 5601/10368 cut-off events. For 854985/854985 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 81510 event pairs, 798 based on Foata normal form. 12/10380 useless extension candidates. Maximal degree in co-relation 131343. Up to 7462 conditions per place. [2023-01-28 02:17:50,493 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 873 selfloop transitions, 528 changer transitions 2/1403 dead transitions. [2023-01-28 02:17:50,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1403 transitions, 32935 flow [2023-01-28 02:17:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 02:17:50,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 02:17:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2478 transitions. [2023-01-28 02:17:50,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3325281803542673 [2023-01-28 02:17:50,495 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2478 transitions. [2023-01-28 02:17:50,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2478 transitions. [2023-01-28 02:17:50,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:17:50,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2478 transitions. [2023-01-28 02:17:50,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 107.73913043478261) internal successors, (2478), 23 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:50,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 324.0) internal successors, (7776), 24 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:50,500 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 324.0) internal successors, (7776), 24 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:50,500 INFO L175 Difference]: Start difference. First operand has 433 places, 1295 transitions, 27652 flow. Second operand 23 states and 2478 transitions. [2023-01-28 02:17:50,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 1403 transitions, 32935 flow [2023-01-28 02:17:53,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1403 transitions, 32260 flow, removed 47 selfloop flow, removed 11 redundant places. [2023-01-28 02:17:53,908 INFO L231 Difference]: Finished difference. Result has 446 places, 1319 transitions, 28876 flow [2023-01-28 02:17:53,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=26997, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=782, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=28876, PETRI_PLACES=446, PETRI_TRANSITIONS=1319} [2023-01-28 02:17:53,909 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 425 predicate places. [2023-01-28 02:17:53,909 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 1319 transitions, 28876 flow [2023-01-28 02:17:53,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 104.10344827586206) internal successors, (3019), 29 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:53,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:17:53,910 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:17:53,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-01-28 02:17:54,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-01-28 02:17:54,110 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:17:54,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:17:54,111 INFO L85 PathProgramCache]: Analyzing trace with hash 93397669, now seen corresponding path program 19 times [2023-01-28 02:17:54,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:17:54,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882320497] [2023-01-28 02:17:54,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:17:54,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:17:54,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:17:54,450 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:17:54,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:17:54,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882320497] [2023-01-28 02:17:54,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882320497] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:17:54,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250290140] [2023-01-28 02:17:54,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 02:17:54,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:17:54,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:17:54,452 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:17:54,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-01-28 02:17:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:17:54,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 31 conjunts are in the unsatisfiable core [2023-01-28 02:17:54,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:17:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 02:17:54,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:17:54,988 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-28 02:17:54,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-28 02:17:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-28 02:17:55,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250290140] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:17:55,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:17:55,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 27 [2023-01-28 02:17:55,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993200568] [2023-01-28 02:17:55,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:17:55,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 02:17:55,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:17:55,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 02:17:55,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2023-01-28 02:17:55,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 324 [2023-01-28 02:17:55,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 1319 transitions, 28876 flow. Second operand has 28 states, 28 states have (on average 104.10714285714286) internal successors, (2915), 28 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:17:55,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:17:55,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 324 [2023-01-28 02:17:55,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:18:00,466 INFO L130 PetriNetUnfolder]: 5601/10404 cut-off events. [2023-01-28 02:18:00,466 INFO L131 PetriNetUnfolder]: For 882883/882883 co-relation queries the response was YES. [2023-01-28 02:18:00,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133939 conditions, 10404 events. 5601/10404 cut-off events. For 882883/882883 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 82184 event pairs, 812 based on Foata normal form. 24/10428 useless extension candidates. Maximal degree in co-relation 133758. Up to 7620 conditions per place. [2023-01-28 02:18:00,599 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 874 selfloop transitions, 505 changer transitions 17/1396 dead transitions. [2023-01-28 02:18:00,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 1396 transitions, 33307 flow [2023-01-28 02:18:00,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 02:18:00,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 02:18:00,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2374 transitions. [2023-01-28 02:18:00,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3330527497194164 [2023-01-28 02:18:00,601 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2374 transitions. [2023-01-28 02:18:00,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2374 transitions. [2023-01-28 02:18:00,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:18:00,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2374 transitions. [2023-01-28 02:18:00,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 107.9090909090909) internal successors, (2374), 22 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:18:00,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:18:00,606 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:18:00,606 INFO L175 Difference]: Start difference. First operand has 446 places, 1319 transitions, 28876 flow. Second operand 22 states and 2374 transitions. [2023-01-28 02:18:00,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 1396 transitions, 33307 flow [2023-01-28 02:18:03,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1396 transitions, 32439 flow, removed 59 selfloop flow, removed 16 redundant places. [2023-01-28 02:18:03,985 INFO L231 Difference]: Finished difference. Result has 451 places, 1314 transitions, 28958 flow [2023-01-28 02:18:03,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=28008, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=814, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=28958, PETRI_PLACES=451, PETRI_TRANSITIONS=1314} [2023-01-28 02:18:03,986 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 430 predicate places. [2023-01-28 02:18:03,986 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 1314 transitions, 28958 flow [2023-01-28 02:18:03,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 104.10714285714286) internal successors, (2915), 28 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:18:03,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:18:03,987 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:18:03,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-01-28 02:18:04,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-01-28 02:18:04,191 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:18:04,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:18:04,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1305015792, now seen corresponding path program 27 times [2023-01-28 02:18:04,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:18:04,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121319974] [2023-01-28 02:18:04,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:18:04,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:18:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:18:04,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:18:04,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:18:04,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121319974] [2023-01-28 02:18:04,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121319974] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:18:04,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444730145] [2023-01-28 02:18:04,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:18:04,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:18:04,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:18:04,700 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:18:04,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-01-28 02:18:05,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 02:18:05,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:18:05,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 58 conjunts are in the unsatisfiable core [2023-01-28 02:18:05,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:18:05,396 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 [2023-01-28 02:18:05,444 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 6 treesize of output 5 [2023-01-28 02:18:05,505 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 [2023-01-28 02:18:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:18:05,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:18:13,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:18:13,278 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 114 treesize of output 78 [2023-01-28 02:18:13,322 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-28 02:18:13,323 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 1740 treesize of output 1520 [2023-01-28 02:18:13,354 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:18:13,355 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:18:13,373 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:18:13,373 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 724 treesize of output 566 [2023-01-28 02:18:13,388 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:18:13,388 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:18:13,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:18:13,407 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 516 treesize of output 462 [2023-01-28 02:18:15,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:18:15,417 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 56 treesize of output 45 [2023-01-28 02:18:15,427 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:18:15,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 422 treesize of output 370 [2023-01-28 02:18:15,450 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:18:15,451 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 358 treesize of output 271 [2023-01-28 02:18:15,465 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:18:15,465 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 262 treesize of output 223 [2023-01-28 02:18:15,559 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 02:18:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 13 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:18:16,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444730145] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:18:16,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:18:16,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 48 [2023-01-28 02:18:16,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318275743] [2023-01-28 02:18:16,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:18:16,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-01-28 02:18:16,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:18:16,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-01-28 02:18:16,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=2080, Unknown=17, NotChecked=0, Total=2352 [2023-01-28 02:18:16,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 324 [2023-01-28 02:18:16,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 1314 transitions, 28958 flow. Second operand has 49 states, 49 states have (on average 81.44897959183673) internal successors, (3991), 49 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:18:16,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:18:16,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 324 [2023-01-28 02:18:16,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:18:34,127 INFO L130 PetriNetUnfolder]: 6518/12095 cut-off events. [2023-01-28 02:18:34,128 INFO L131 PetriNetUnfolder]: For 1052027/1052027 co-relation queries the response was YES. [2023-01-28 02:18:34,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157481 conditions, 12095 events. 6518/12095 cut-off events. For 1052027/1052027 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 98259 event pairs, 809 based on Foata normal form. 16/12111 useless extension candidates. Maximal degree in co-relation 157299. Up to 8344 conditions per place. [2023-01-28 02:18:34,285 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 1103 selfloop transitions, 636 changer transitions 5/1744 dead transitions. [2023-01-28 02:18:34,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 1744 transitions, 41261 flow [2023-01-28 02:18:34,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-01-28 02:18:34,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-01-28 02:18:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 4856 transitions. [2023-01-28 02:18:34,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2629413038769764 [2023-01-28 02:18:34,289 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 4856 transitions. [2023-01-28 02:18:34,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 4856 transitions. [2023-01-28 02:18:34,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:18:34,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 4856 transitions. [2023-01-28 02:18:34,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 85.19298245614036) internal successors, (4856), 57 states have internal predecessors, (4856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:18:34,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 324.0) internal successors, (18792), 58 states have internal predecessors, (18792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:18:34,300 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 324.0) internal successors, (18792), 58 states have internal predecessors, (18792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:18:34,300 INFO L175 Difference]: Start difference. First operand has 451 places, 1314 transitions, 28958 flow. Second operand 57 states and 4856 transitions. [2023-01-28 02:18:34,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 1744 transitions, 41261 flow [2023-01-28 02:18:38,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 1744 transitions, 40080 flow, removed 0 selfloop flow, removed 19 redundant places. [2023-01-28 02:18:38,683 INFO L231 Difference]: Finished difference. Result has 504 places, 1548 transitions, 35648 flow [2023-01-28 02:18:38,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=27963, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=436, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=35648, PETRI_PLACES=504, PETRI_TRANSITIONS=1548} [2023-01-28 02:18:38,685 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 483 predicate places. [2023-01-28 02:18:38,685 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 1548 transitions, 35648 flow [2023-01-28 02:18:38,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 81.44897959183673) internal successors, (3991), 49 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:18:38,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:18:38,685 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:18:38,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-01-28 02:18:38,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:18:38,886 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:18:38,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:18:38,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1756967216, now seen corresponding path program 28 times [2023-01-28 02:18:38,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:18:38,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913534549] [2023-01-28 02:18:38,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:18:38,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:18:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:18:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:18:39,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:18:39,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913534549] [2023-01-28 02:18:39,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913534549] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:18:39,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220799270] [2023-01-28 02:18:39,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:18:39,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:18:39,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:18:39,469 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:18:39,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-01-28 02:18:39,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:18:39,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:18:39,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 02:18:39,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:18:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-28 02:18:39,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:18:40,403 INFO L321 Elim1Store]: treesize reduction 15, result has 93.1 percent of original size [2023-01-28 02:18:40,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 232 [2023-01-28 02:18:56,170 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-28 02:18:56,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220799270] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:18:56,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:18:56,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 30 [2023-01-28 02:18:56,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078472097] [2023-01-28 02:18:56,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:18:56,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 02:18:56,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:18:56,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 02:18:56,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2023-01-28 02:18:56,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-28 02:18:56,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 1548 transitions, 35648 flow. Second operand has 31 states, 31 states have (on average 90.2258064516129) internal successors, (2797), 31 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:18:56,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:18:56,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-28 02:18:56,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:19:05,786 INFO L130 PetriNetUnfolder]: 7327/13518 cut-off events. [2023-01-28 02:19:05,787 INFO L131 PetriNetUnfolder]: For 1719210/1719210 co-relation queries the response was YES. [2023-01-28 02:19:05,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183667 conditions, 13518 events. 7327/13518 cut-off events. For 1719210/1719210 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 111130 event pairs, 927 based on Foata normal form. 520/14038 useless extension candidates. Maximal degree in co-relation 183467. Up to 7340 conditions per place. [2023-01-28 02:19:05,988 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 1176 selfloop transitions, 913 changer transitions 71/2160 dead transitions. [2023-01-28 02:19:05,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 2160 transitions, 53756 flow [2023-01-28 02:19:05,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-01-28 02:19:05,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-01-28 02:19:05,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 5067 transitions. [2023-01-28 02:19:05,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28960905349794236 [2023-01-28 02:19:05,992 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 5067 transitions. [2023-01-28 02:19:05,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 5067 transitions. [2023-01-28 02:19:05,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:19:05,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 5067 transitions. [2023-01-28 02:19:05,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 93.83333333333333) internal successors, (5067), 54 states have internal predecessors, (5067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:19:06,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 324.0) internal successors, (17820), 55 states have internal predecessors, (17820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:19:06,003 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 324.0) internal successors, (17820), 55 states have internal predecessors, (17820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:19:06,003 INFO L175 Difference]: Start difference. First operand has 504 places, 1548 transitions, 35648 flow. Second operand 54 states and 5067 transitions. [2023-01-28 02:19:06,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 2160 transitions, 53756 flow [2023-01-28 02:19:12,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 2160 transitions, 51891 flow, removed 891 selfloop flow, removed 18 redundant places. [2023-01-28 02:19:12,678 INFO L231 Difference]: Finished difference. Result has 560 places, 1745 transitions, 42630 flow [2023-01-28 02:19:12,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=34198, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=713, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=42630, PETRI_PLACES=560, PETRI_TRANSITIONS=1745} [2023-01-28 02:19:12,680 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 539 predicate places. [2023-01-28 02:19:12,680 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 1745 transitions, 42630 flow [2023-01-28 02:19:12,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 90.2258064516129) internal successors, (2797), 31 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:19:12,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:19:12,680 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:19:12,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-01-28 02:19:12,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:19:12,886 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:19:12,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:19:12,888 INFO L85 PathProgramCache]: Analyzing trace with hash -359157412, now seen corresponding path program 29 times [2023-01-28 02:19:12,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:19:12,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895538129] [2023-01-28 02:19:12,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:19:12,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:19:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:19:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:19:13,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:19:13,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895538129] [2023-01-28 02:19:13,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895538129] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:19:13,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434103108] [2023-01-28 02:19:13,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:19:13,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:19:13,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:19:13,410 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:19:13,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-01-28 02:19:13,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 02:19:13,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:19:13,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 02:19:13,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:19:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 02:19:13,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:19:14,329 INFO L321 Elim1Store]: treesize reduction 41, result has 79.0 percent of original size [2023-01-28 02:19:14,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 183 [2023-01-28 02:19:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-28 02:19:15,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434103108] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:19:15,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:19:15,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 8] total 33 [2023-01-28 02:19:15,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208458037] [2023-01-28 02:19:15,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:19:15,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 02:19:15,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:19:15,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 02:19:15,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2023-01-28 02:19:15,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-28 02:19:15,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 1745 transitions, 42630 flow. Second operand has 34 states, 34 states have (on average 90.02941176470588) internal successors, (3061), 34 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:19:15,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:19:15,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-28 02:19:15,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:19:25,086 INFO L130 PetriNetUnfolder]: 7383/13922 cut-off events. [2023-01-28 02:19:25,086 INFO L131 PetriNetUnfolder]: For 2751089/2751089 co-relation queries the response was YES. [2023-01-28 02:19:25,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208166 conditions, 13922 events. 7383/13922 cut-off events. For 2751089/2751089 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 117195 event pairs, 1047 based on Foata normal form. 288/14210 useless extension candidates. Maximal degree in co-relation 207944. Up to 9322 conditions per place. [2023-01-28 02:19:25,309 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 1215 selfloop transitions, 879 changer transitions 20/2114 dead transitions. [2023-01-28 02:19:25,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 2114 transitions, 55588 flow [2023-01-28 02:19:25,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-01-28 02:19:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-01-28 02:19:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4032 transitions. [2023-01-28 02:19:25,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28940568475452194 [2023-01-28 02:19:25,312 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4032 transitions. [2023-01-28 02:19:25,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4032 transitions. [2023-01-28 02:19:25,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:19:25,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4032 transitions. [2023-01-28 02:19:25,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 93.76744186046511) internal successors, (4032), 43 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:19:25,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 324.0) internal successors, (14256), 44 states have internal predecessors, (14256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:19:25,321 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 324.0) internal successors, (14256), 44 states have internal predecessors, (14256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:19:25,321 INFO L175 Difference]: Start difference. First operand has 560 places, 1745 transitions, 42630 flow. Second operand 43 states and 4032 transitions. [2023-01-28 02:19:25,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 2114 transitions, 55588 flow [2023-01-28 02:19:34,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 2114 transitions, 51725 flow, removed 1203 selfloop flow, removed 23 redundant places. [2023-01-28 02:19:34,850 INFO L231 Difference]: Finished difference. Result has 593 places, 1879 transitions, 45267 flow [2023-01-28 02:19:34,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=38849, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=738, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=997, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=45267, PETRI_PLACES=593, PETRI_TRANSITIONS=1879} [2023-01-28 02:19:34,852 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 572 predicate places. [2023-01-28 02:19:34,852 INFO L495 AbstractCegarLoop]: Abstraction has has 593 places, 1879 transitions, 45267 flow [2023-01-28 02:19:34,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 90.02941176470588) internal successors, (3061), 34 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:19:34,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:19:34,852 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:19:34,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-01-28 02:19:35,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:19:35,058 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:19:35,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:19:35,058 INFO L85 PathProgramCache]: Analyzing trace with hash 2023043557, now seen corresponding path program 20 times [2023-01-28 02:19:35,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:19:35,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320171996] [2023-01-28 02:19:35,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:19:35,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:19:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:19:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:19:35,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:19:35,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320171996] [2023-01-28 02:19:35,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320171996] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:19:35,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990785321] [2023-01-28 02:19:35,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:19:35,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:19:35,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:19:35,365 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:19:35,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-01-28 02:19:35,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:19:35,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:19:35,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 02:19:35,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:19:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-28 02:19:35,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:19:35,790 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-28 02:19:35,790 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 40 treesize of output 56 [2023-01-28 02:19:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-28 02:19:35,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990785321] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:19:35,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:19:35,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 6] total 25 [2023-01-28 02:19:35,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517673768] [2023-01-28 02:19:35,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:19:35,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 02:19:35,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:19:35,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 02:19:35,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2023-01-28 02:19:35,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 324 [2023-01-28 02:19:35,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 1879 transitions, 45267 flow. Second operand has 26 states, 26 states have (on average 104.34615384615384) internal successors, (2713), 26 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:19:35,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:19:35,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 324 [2023-01-28 02:19:35,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:19:44,994 INFO L130 PetriNetUnfolder]: 7574/14300 cut-off events. [2023-01-28 02:19:44,994 INFO L131 PetriNetUnfolder]: For 3460295/3460295 co-relation queries the response was YES. [2023-01-28 02:19:45,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229309 conditions, 14300 events. 7574/14300 cut-off events. For 3460295/3460295 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 121221 event pairs, 835 based on Foata normal form. 12/14312 useless extension candidates. Maximal degree in co-relation 229073. Up to 9662 conditions per place. [2023-01-28 02:19:45,218 INFO L137 encePairwiseOnDemand]: 316/324 looper letters, 1342 selfloop transitions, 714 changer transitions 6/2062 dead transitions. [2023-01-28 02:19:45,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 2062 transitions, 54928 flow [2023-01-28 02:19:45,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 02:19:45,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 02:19:45,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2402 transitions. [2023-01-28 02:19:45,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33698092031425364 [2023-01-28 02:19:45,222 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2402 transitions. [2023-01-28 02:19:45,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2402 transitions. [2023-01-28 02:19:45,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:19:45,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2402 transitions. [2023-01-28 02:19:45,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 109.18181818181819) internal successors, (2402), 22 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:19:45,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:19:45,227 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:19:45,227 INFO L175 Difference]: Start difference. First operand has 593 places, 1879 transitions, 45267 flow. Second operand 22 states and 2402 transitions. [2023-01-28 02:19:45,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 2062 transitions, 54928 flow [2023-01-28 02:20:01,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 2062 transitions, 53940 flow, removed 364 selfloop flow, removed 16 redundant places. [2023-01-28 02:20:01,065 INFO L231 Difference]: Finished difference. Result has 602 places, 1918 transitions, 46988 flow [2023-01-28 02:20:01,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=44376, PETRI_DIFFERENCE_MINUEND_PLACES=577, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1879, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=677, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=46988, PETRI_PLACES=602, PETRI_TRANSITIONS=1918} [2023-01-28 02:20:01,066 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 581 predicate places. [2023-01-28 02:20:01,066 INFO L495 AbstractCegarLoop]: Abstraction has has 602 places, 1918 transitions, 46988 flow [2023-01-28 02:20:01,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 104.34615384615384) internal successors, (2713), 26 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:20:01,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:20:01,066 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:20:01,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-01-28 02:20:01,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-01-28 02:20:01,269 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:20:01,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:20:01,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1673633428, now seen corresponding path program 30 times [2023-01-28 02:20:01,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:20:01,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120895576] [2023-01-28 02:20:01,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:20:01,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:20:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:20:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:20:01,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:20:01,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120895576] [2023-01-28 02:20:01,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120895576] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:20:01,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664340555] [2023-01-28 02:20:01,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:20:01,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:20:01,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:20:01,748 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:20:01,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-01-28 02:20:02,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-01-28 02:20:02,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:20:02,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-28 02:20:02,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:20:02,256 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 [2023-01-28 02:20:02,302 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 [2023-01-28 02:20:02,343 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 [2023-01-28 02:20:03,162 INFO L321 Elim1Store]: treesize reduction 12, result has 94.6 percent of original size [2023-01-28 02:20:03,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 87 treesize of output 232 [2023-01-28 02:20:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:20:14,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:20:17,942 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:20:17,942 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 114 treesize of output 78 [2023-01-28 02:20:17,988 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-28 02:20:17,988 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 1740 treesize of output 1520 [2023-01-28 02:20:18,051 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:20:18,054 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:20:18,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:20:18,070 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 724 treesize of output 670 [2023-01-28 02:20:18,088 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:20:18,092 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:20:18,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:20:18,108 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 620 treesize of output 462 [2023-01-28 02:20:19,510 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:20:19,510 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 114 treesize of output 78 [2023-01-28 02:20:19,553 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-28 02:20:19,553 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 860 treesize of output 776 [2023-01-28 02:20:19,568 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:20:19,571 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:20:19,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:20:19,587 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 724 treesize of output 566 [2023-01-28 02:20:19,605 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:20:19,608 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:20:19,624 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:20:19,624 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 516 treesize of output 462 [2023-01-28 02:20:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:20:27,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664340555] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:20:27,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:20:27,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2023-01-28 02:20:27,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648244472] [2023-01-28 02:20:27,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:20:27,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-01-28 02:20:27,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:20:27,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-01-28 02:20:27,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1973, Unknown=7, NotChecked=0, Total=2352 [2023-01-28 02:20:27,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 324 [2023-01-28 02:20:27,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 1918 transitions, 46988 flow. Second operand has 49 states, 49 states have (on average 81.57142857142857) internal successors, (3997), 49 states have internal predecessors, (3997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:20:27,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:20:27,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 324 [2023-01-28 02:20:27,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:20:48,463 WARN L222 SmtUtils]: Spent 10.12s on a formula simplification that was a NOOP. DAG size: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 02:21:10,986 WARN L222 SmtUtils]: Spent 14.10s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 02:21:23,912 WARN L222 SmtUtils]: Spent 12.14s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 02:21:27,515 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] [2023-01-28 02:21:29,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 02:21:31,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 02:21:33,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 02:21:55,915 WARN L222 SmtUtils]: Spent 18.14s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 02:21:57,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 02:21:59,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 02:22:03,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 02:22:05,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 02:22:07,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 02:22:09,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 02:22:11,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 02:22:13,678 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] [2023-01-28 02:22:47,755 WARN L222 SmtUtils]: Spent 26.61s on a formula simplification. DAG size of input: 129 DAG size of output: 125 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 02:23:24,678 WARN L222 SmtUtils]: Spent 34.21s on a formula simplification. DAG size of input: 142 DAG size of output: 138 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 02:23:36,016 WARN L222 SmtUtils]: Spent 10.17s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 02:23:51,040 WARN L222 SmtUtils]: Spent 10.51s on a formula simplification that was a NOOP. DAG size: 138 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 02:24:12,505 INFO L130 PetriNetUnfolder]: 25940/49572 cut-off events. [2023-01-28 02:24:12,505 INFO L131 PetriNetUnfolder]: For 12616721/12616721 co-relation queries the response was YES. [2023-01-28 02:24:13,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807948 conditions, 49572 events. 25940/49572 cut-off events. For 12616721/12616721 co-relation queries the response was YES. Maximal size of possible extension queue 2669. Compared 504728 event pairs, 942 based on Foata normal form. 1105/50677 useless extension candidates. Maximal degree in co-relation 807707. Up to 17401 conditions per place. [2023-01-28 02:24:14,164 INFO L137 encePairwiseOnDemand]: 311/324 looper letters, 3329 selfloop transitions, 4526 changer transitions 427/8282 dead transitions. [2023-01-28 02:24:14,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 8282 transitions, 217123 flow [2023-01-28 02:24:14,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-01-28 02:24:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2023-01-28 02:24:14,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 9054 transitions. [2023-01-28 02:24:14,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2636268343815514 [2023-01-28 02:24:14,170 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 9054 transitions. [2023-01-28 02:24:14,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 9054 transitions. [2023-01-28 02:24:14,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:24:14,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 9054 transitions. [2023-01-28 02:24:14,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 85.41509433962264) internal successors, (9054), 106 states have internal predecessors, (9054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:24:14,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 324.0) internal successors, (34668), 107 states have internal predecessors, (34668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:24:14,195 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 324.0) internal successors, (34668), 107 states have internal predecessors, (34668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:24:14,195 INFO L175 Difference]: Start difference. First operand has 602 places, 1918 transitions, 46988 flow. Second operand 106 states and 9054 transitions. [2023-01-28 02:24:14,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 8282 transitions, 217123 flow Received shutdown request... [2023-01-28 02:24:46,763 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 02:24:46,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-01-28 02:24:46,794 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 02:24:46,794 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 02:24:46,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-01-28 02:24:46,964 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-01-28 02:24:46,965 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 02:24:46,965 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 02:24:46,966 INFO L445 BasicCegarLoop]: Path program histogram: [30, 20, 5, 4, 1, 1, 1, 1, 1, 1] [2023-01-28 02:24:46,968 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 02:24:46,968 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 02:24:46,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 02:24:46 BasicIcfg [2023-01-28 02:24:46,969 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 02:24:46,969 INFO L158 Benchmark]: Toolchain (without parser) took 813510.67ms. Allocated memory was 341.8MB in the beginning and 7.9GB in the end (delta: 7.6GB). Free memory was 301.0MB in the beginning and 5.3GB in the end (delta: -5.0GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. [2023-01-28 02:24:46,970 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 212.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 02:24:46,970 INFO L158 Benchmark]: CACSL2BoogieTranslator took 166.67ms. Allocated memory is still 341.8MB. Free memory was 301.0MB in the beginning and 289.8MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 02:24:46,970 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.45ms. Allocated memory is still 341.8MB. Free memory was 289.8MB in the beginning and 288.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 02:24:46,970 INFO L158 Benchmark]: Boogie Preprocessor took 18.47ms. Allocated memory is still 341.8MB. Free memory was 288.1MB in the beginning and 286.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 02:24:46,970 INFO L158 Benchmark]: RCFGBuilder took 434.10ms. Allocated memory is still 341.8MB. Free memory was 286.4MB in the beginning and 269.6MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-01-28 02:24:46,970 INFO L158 Benchmark]: TraceAbstraction took 812862.83ms. Allocated memory was 341.8MB in the beginning and 7.9GB in the end (delta: 7.6GB). Free memory was 269.0MB in the beginning and 5.3GB in the end (delta: -5.0GB). Peak memory consumption was 4.0GB. Max. memory is 16.0GB. [2023-01-28 02:24:46,970 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 212.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 166.67ms. Allocated memory is still 341.8MB. Free memory was 301.0MB in the beginning and 289.8MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 24.45ms. Allocated memory is still 341.8MB. Free memory was 289.8MB in the beginning and 288.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 18.47ms. Allocated memory is still 341.8MB. Free memory was 288.1MB in the beginning and 286.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 434.10ms. Allocated memory is still 341.8MB. Free memory was 286.4MB in the beginning and 269.6MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 812862.83ms. Allocated memory was 341.8MB in the beginning and 7.9GB in the end (delta: 7.6GB). Free memory was 269.0MB in the beginning and 5.3GB in the end (delta: -5.0GB). Peak memory consumption was 4.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.7s, 145 PlacesBefore, 21 PlacesAfterwards, 153 TransitionsBefore, 19 TransitionsAfterwards, 992 CoEnabledTransitionPairs, 7 FixpointIterations, 94 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 19 TrivialYvCompositions, 8 ConcurrentYvCompositions, 10 ChoiceCompositions, 161 TotalNumberOfCompositions, 1281 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1142, independent: 1103, independent conditional: 0, independent unconditional: 1103, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 576, independent: 565, independent conditional: 0, independent unconditional: 565, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1142, independent: 538, independent conditional: 0, independent unconditional: 538, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 576, unknown conditional: 0, unknown unconditional: 576] , Statistics on independence cache: Total cache size (in pairs): 22, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 179 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 812.8s, OverallIterations: 65, TraceHistogramMax: 3, PathProgramHistogramMax: 30, EmptinessCheckTime: 0.0s, AutomataDifference: 546.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.9s, HoareTripleCheckerStatistics: 759 mSolverCounterUnknown, 7437 SdHoareTripleChecker+Valid, 83.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7437 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 79.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1459 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 972 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 41865 IncrementalHoareTripleChecker+Invalid, 45055 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 972 mSolverCounterUnsat, 0 mSDtfsCounter, 41865 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 759 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3851 GetRequests, 1745 SyntacticMatches, 42 SemanticMatches, 2064 ConstructedPredicates, 13 IntricatePredicates, 5 DeprecatedPredicates, 22506 ImplicationChecksByTransitivity, 295.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46988occurred in iteration=64, InterpolantAutomatonStates: 1079, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 240.7s InterpolantComputationTime, 2702 NumberOfCodeBlocks, 2702 NumberOfCodeBlocksAsserted, 197 NumberOfCheckSat, 3825 ConstructedInterpolants, 154 QuantifiedInterpolants, 51848 SizeOfPredicates, 573 NumberOfNonLiveVariables, 13723 ConjunctsInSsa, 1524 ConjunctsInUnsatCore, 183 InterpolantComputations, 10 PerfectInterpolantSequences, 1030/2193 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown