./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-context1.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/test-context1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 14:47:38,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:47:38,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:47:38,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:47:38,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:47:38,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:47:38,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:47:38,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:47:38,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:47:38,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:47:38,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:47:38,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:47:38,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:47:38,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:47:38,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:47:38,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:47:38,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:47:38,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:47:38,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:47:38,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:47:38,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:47:38,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:47:38,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:47:38,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:47:38,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:47:38,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:47:38,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:47:38,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:47:38,940 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:47:38,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:47:38,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:47:38,945 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:47:38,947 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:47:38,947 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:47:38,948 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:47:38,948 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:47:38,949 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:47:38,949 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:47:38,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:47:38,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:47:38,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:47:38,951 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:47:38,977 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:47:38,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:47:38,978 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:47:38,978 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:47:38,979 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:47:38,979 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:47:38,980 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:47:38,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:47:38,980 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:47:38,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:47:38,981 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:47:38,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:47:38,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:47:38,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:47:38,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:47:38,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:47:38,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:47:38,982 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:47:38,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:47:38,982 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:47:38,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:47:38,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:47:38,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:47:38,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:47:38,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:47:38,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:47:38,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:47:38,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:47:38,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:47:38,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:47:38,984 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:47:38,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:47:38,985 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:47:38,985 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:47:38,985 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:47:38,985 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:47:39,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:47:39,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:47:39,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:47:39,262 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:47:39,262 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:47:39,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-09-01 14:47:40,137 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:47:40,281 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:47:40,282 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-09-01 14:47:40,286 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af901f616/e6e5259acb6249d190d95c173a2aaf7f/FLAG264e96565 [2023-09-01 14:47:40,296 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af901f616/e6e5259acb6249d190d95c173a2aaf7f [2023-09-01 14:47:40,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:47:40,298 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:47:40,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:47:40,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:47:40,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:47:40,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:47:40" (1/1) ... [2023-09-01 14:47:40,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6888ddc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:47:40, skipping insertion in model container [2023-09-01 14:47:40,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:47:40" (1/1) ... [2023-09-01 14:47:40,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:47:40,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:47:40,414 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/test-context1.wvr.c[2433,2446] [2023-09-01 14:47:40,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:47:40,424 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:47:40,435 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/test-context1.wvr.c[2433,2446] [2023-09-01 14:47:40,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:47:40,442 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:47:40,443 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:47:40,447 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:47:40,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:47:40 WrapperNode [2023-09-01 14:47:40,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:47:40,448 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:47:40,448 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:47:40,448 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:47:40,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:47:40" (1/1) ... [2023-09-01 14:47:40,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:47:40" (1/1) ... [2023-09-01 14:47:40,491 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 135 [2023-09-01 14:47:40,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:47:40,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:47:40,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:47:40,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:47:40,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:47:40" (1/1) ... [2023-09-01 14:47:40,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:47:40" (1/1) ... [2023-09-01 14:47:40,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:47:40" (1/1) ... [2023-09-01 14:47:40,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:47:40" (1/1) ... [2023-09-01 14:47:40,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:47:40" (1/1) ... [2023-09-01 14:47:40,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:47:40" (1/1) ... [2023-09-01 14:47:40,527 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:47:40" (1/1) ... [2023-09-01 14:47:40,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:47:40" (1/1) ... [2023-09-01 14:47:40,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:47:40,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:47:40,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:47:40,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:47:40,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:47:40" (1/1) ... [2023-09-01 14:47:40,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:47:40,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:47:40,561 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 14:47:40,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 14:47:40,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:47:40,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:47:40,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:47:40,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:47:40,594 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:47:40,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:47:40,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:47:40,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:47:40,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 14:47:40,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 14:47:40,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 14:47:40,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:47:40,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:47:40,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:47:40,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:47:40,596 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 14:47:40,721 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:47:40,722 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:47:40,923 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:47:40,999 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:47:41,000 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 14:47:41,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:47:41 BoogieIcfgContainer [2023-09-01 14:47:41,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:47:41,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:47:41,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:47:41,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:47:41,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:47:40" (1/3) ... [2023-09-01 14:47:41,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562ca498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:47:41, skipping insertion in model container [2023-09-01 14:47:41,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:47:40" (2/3) ... [2023-09-01 14:47:41,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562ca498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:47:41, skipping insertion in model container [2023-09-01 14:47:41,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:47:41" (3/3) ... [2023-09-01 14:47:41,007 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2023-09-01 14:47:41,012 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:47:41,018 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:47:41,018 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:47:41,018 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:47:41,081 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 14:47:41,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 110 transitions, 236 flow [2023-09-01 14:47:41,159 INFO L130 PetriNetUnfolder]: 9/108 cut-off events. [2023-09-01 14:47:41,159 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:47:41,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 108 events. 9/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2023-09-01 14:47:41,163 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 110 transitions, 236 flow [2023-09-01 14:47:41,166 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 100 transitions, 212 flow [2023-09-01 14:47:41,168 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:47:41,179 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 100 transitions, 212 flow [2023-09-01 14:47:41,182 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 100 transitions, 212 flow [2023-09-01 14:47:41,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 100 transitions, 212 flow [2023-09-01 14:47:41,212 INFO L130 PetriNetUnfolder]: 9/100 cut-off events. [2023-09-01 14:47:41,212 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:47:41,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 100 events. 9/100 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2023-09-01 14:47:41,213 INFO L119 LiptonReduction]: Number of co-enabled transitions 432 [2023-09-01 14:47:43,834 INFO L134 LiptonReduction]: Checked pairs total: 513 [2023-09-01 14:47:43,835 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-09-01 14:47:43,843 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:47:43,847 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@39844d39, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:47:43,847 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 14:47:43,850 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-09-01 14:47:43,850 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:47:43,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:47:43,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:47:43,851 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:47:43,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:47:43,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1991554592, now seen corresponding path program 1 times [2023-09-01 14:47:43,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:47:43,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130521822] [2023-09-01 14:47:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:47:43,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:47:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:47:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:47:44,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:47:44,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130521822] [2023-09-01 14:47:44,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130521822] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:47:44,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:47:44,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 14:47:44,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46384659] [2023-09-01 14:47:44,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:47:44,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:47:44,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:47:44,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:47:44,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:47:44,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 211 [2023-09-01 14:47:44,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:44,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:47:44,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 211 [2023-09-01 14:47:44,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:47:44,392 INFO L130 PetriNetUnfolder]: 59/111 cut-off events. [2023-09-01 14:47:44,392 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-09-01 14:47:44,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 111 events. 59/111 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 267 event pairs, 18 based on Foata normal form. 2/77 useless extension candidates. Maximal degree in co-relation 100. Up to 43 conditions per place. [2023-09-01 14:47:44,395 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 28 selfloop transitions, 4 changer transitions 4/36 dead transitions. [2023-09-01 14:47:44,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 36 transitions, 174 flow [2023-09-01 14:47:44,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:47:44,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:47:44,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 402 transitions. [2023-09-01 14:47:44,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.476303317535545 [2023-09-01 14:47:44,411 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 402 transitions. [2023-09-01 14:47:44,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 402 transitions. [2023-09-01 14:47:44,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:47:44,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 402 transitions. [2023-09-01 14:47:44,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:44,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:44,422 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:44,423 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 4 states and 402 transitions. [2023-09-01 14:47:44,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 36 transitions, 174 flow [2023-09-01 14:47:44,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 36 transitions, 154 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 14:47:44,426 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 61 flow [2023-09-01 14:47:44,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=61, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-09-01 14:47:44,429 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2023-09-01 14:47:44,429 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 61 flow [2023-09-01 14:47:44,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:44,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:47:44,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:47:44,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:47:44,430 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:47:44,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:47:44,431 INFO L85 PathProgramCache]: Analyzing trace with hash 220979605, now seen corresponding path program 1 times [2023-09-01 14:47:44,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:47:44,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377397709] [2023-09-01 14:47:44,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:47:44,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:47:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:47:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:47:44,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:47:44,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377397709] [2023-09-01 14:47:44,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377397709] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:47:44,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:47:44,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 14:47:44,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391752040] [2023-09-01 14:47:44,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:47:44,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:47:44,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:47:44,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:47:44,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:47:44,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-09-01 14:47:44,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:44,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:47:44,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-09-01 14:47:44,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:47:44,538 INFO L130 PetriNetUnfolder]: 87/173 cut-off events. [2023-09-01 14:47:44,538 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-09-01 14:47:44,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 173 events. 87/173 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 566 event pairs, 26 based on Foata normal form. 12/157 useless extension candidates. Maximal degree in co-relation 224. Up to 117 conditions per place. [2023-09-01 14:47:44,539 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 20 selfloop transitions, 2 changer transitions 5/27 dead transitions. [2023-09-01 14:47:44,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 27 transitions, 136 flow [2023-09-01 14:47:44,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:47:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:47:44,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 313 transitions. [2023-09-01 14:47:44,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49447077409162715 [2023-09-01 14:47:44,541 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 313 transitions. [2023-09-01 14:47:44,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 313 transitions. [2023-09-01 14:47:44,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:47:44,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 313 transitions. [2023-09-01 14:47:44,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:44,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:44,544 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:44,544 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 61 flow. Second operand 3 states and 313 transitions. [2023-09-01 14:47:44,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 27 transitions, 136 flow [2023-09-01 14:47:44,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 27 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 14:47:44,546 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 75 flow [2023-09-01 14:47:44,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-09-01 14:47:44,547 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2023-09-01 14:47:44,547 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 75 flow [2023-09-01 14:47:44,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:44,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:47:44,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:47:44,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:47:44,548 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:47:44,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:47:44,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2120815196, now seen corresponding path program 1 times [2023-09-01 14:47:44,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:47:44,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711014833] [2023-09-01 14:47:44,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:47:44,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:47:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:47:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:47:44,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:47:44,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711014833] [2023-09-01 14:47:44,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711014833] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:47:44,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:47:44,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:47:44,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879049886] [2023-09-01 14:47:44,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:47:44,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:47:44,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:47:44,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:47:44,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:47:44,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 211 [2023-09-01 14:47:44,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:44,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:47:44,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 211 [2023-09-01 14:47:44,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:47:44,778 INFO L130 PetriNetUnfolder]: 61/130 cut-off events. [2023-09-01 14:47:44,779 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-09-01 14:47:44,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 130 events. 61/130 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 355 event pairs, 44 based on Foata normal form. 6/136 useless extension candidates. Maximal degree in co-relation 249. Up to 103 conditions per place. [2023-09-01 14:47:44,782 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 16 selfloop transitions, 2 changer transitions 10/28 dead transitions. [2023-09-01 14:47:44,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 148 flow [2023-09-01 14:47:44,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:47:44,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:47:44,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 387 transitions. [2023-09-01 14:47:44,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585308056872038 [2023-09-01 14:47:44,783 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 387 transitions. [2023-09-01 14:47:44,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 387 transitions. [2023-09-01 14:47:44,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:47:44,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 387 transitions. [2023-09-01 14:47:44,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 96.75) internal successors, (387), 4 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:44,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:44,786 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:44,786 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 75 flow. Second operand 4 states and 387 transitions. [2023-09-01 14:47:44,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 148 flow [2023-09-01 14:47:44,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 28 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:47:44,787 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 76 flow [2023-09-01 14:47:44,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2023-09-01 14:47:44,788 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 8 predicate places. [2023-09-01 14:47:44,790 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 76 flow [2023-09-01 14:47:44,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:44,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:47:44,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:47:44,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 14:47:44,791 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:47:44,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:47:44,792 INFO L85 PathProgramCache]: Analyzing trace with hash 2067904534, now seen corresponding path program 1 times [2023-09-01 14:47:44,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:47:44,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960467995] [2023-09-01 14:47:44,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:47:44,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:47:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:47:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:47:44,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:47:44,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960467995] [2023-09-01 14:47:44,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960467995] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:47:44,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407533418] [2023-09-01 14:47:44,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:47:44,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:47:44,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:47:44,993 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:47:45,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 14:47:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:47:45,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 14:47:45,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:47:45,191 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 [2023-09-01 14:47:45,239 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 [2023-09-01 14:47:45,274 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 [2023-09-01 14:47:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:47:45,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:47:45,432 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse1 (* c_~front~0 4))) (or (not (= 5 (select .cse0 (+ (* c_~size~0 4) .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (= 5 (select .cse0 (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))) is different from false [2023-09-01 14:47:45,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:47:45,443 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 63 treesize of output 51 [2023-09-01 14:47:45,453 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:47:45,454 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 324 treesize of output 289 [2023-09-01 14:47:45,471 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:47:45,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 86 [2023-09-01 14:47:45,480 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 14:47:45,480 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 97 treesize of output 67 [2023-09-01 14:47:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-09-01 14:47:45,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407533418] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:47:45,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:47:45,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2023-09-01 14:47:45,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055108172] [2023-09-01 14:47:45,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:47:45,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 14:47:45,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:47:45,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 14:47:45,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=104, Unknown=7, NotChecked=22, Total=182 [2023-09-01 14:47:45,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 211 [2023-09-01 14:47:45,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 76 flow. Second operand has 14 states, 14 states have (on average 70.14285714285714) internal successors, (982), 14 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:45,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:47:45,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 211 [2023-09-01 14:47:45,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:47:45,582 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_73 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) c_~queue~0.base)) (.cse1 (* c_~front~0 4))) (or (not (= 5 (select .cse0 (+ (* c_~size~0 4) c_~queue~0.offset .cse1)))) (= 5 (select .cse0 (+ c_~queue~0.offset .cse1)))))) (= c_~queue~0.offset 0) (= 5 c_~x~0) (= c_~front~0 0) (= 5 (select (select |c_#memory_int| c_~queue~0.base) 0))) is different from false [2023-09-01 14:47:45,691 INFO L130 PetriNetUnfolder]: 136/258 cut-off events. [2023-09-01 14:47:45,691 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2023-09-01 14:47:45,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 258 events. 136/258 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 962 event pairs, 21 based on Foata normal form. 1/259 useless extension candidates. Maximal degree in co-relation 665. Up to 79 conditions per place. [2023-09-01 14:47:45,693 INFO L137 encePairwiseOnDemand]: 201/211 looper letters, 39 selfloop transitions, 16 changer transitions 14/69 dead transitions. [2023-09-01 14:47:45,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 69 transitions, 363 flow [2023-09-01 14:47:45,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 14:47:45,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 14:47:45,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 681 transitions. [2023-09-01 14:47:45,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358609794628752 [2023-09-01 14:47:45,695 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 681 transitions. [2023-09-01 14:47:45,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 681 transitions. [2023-09-01 14:47:45,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:47:45,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 681 transitions. [2023-09-01 14:47:45,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 75.66666666666667) internal successors, (681), 9 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:45,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:45,699 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:45,700 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 76 flow. Second operand 9 states and 681 transitions. [2023-09-01 14:47:45,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 69 transitions, 363 flow [2023-09-01 14:47:45,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 69 transitions, 353 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 14:47:45,702 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 185 flow [2023-09-01 14:47:45,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=185, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-09-01 14:47:45,703 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 15 predicate places. [2023-09-01 14:47:45,703 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 185 flow [2023-09-01 14:47:45,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.14285714285714) internal successors, (982), 14 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:45,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:47:45,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:47:45,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 14:47:45,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:47:45,910 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:47:45,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:47:45,911 INFO L85 PathProgramCache]: Analyzing trace with hash -2125347476, now seen corresponding path program 2 times [2023-09-01 14:47:45,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:47:45,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063646636] [2023-09-01 14:47:45,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:47:45,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:47:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:47:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:47:46,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:47:46,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063646636] [2023-09-01 14:47:46,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063646636] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:47:46,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112879637] [2023-09-01 14:47:46,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:47:46,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:47:46,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:47:46,253 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:47:46,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 14:47:46,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:47:46,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:47:46,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 14:47:46,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:47:46,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:47:46,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 14:47:46,439 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:47:46,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:47:46,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-09-01 14:47:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:47:46,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:47:46,472 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_104 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_104) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2023-09-01 14:47:46,482 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:47:46,482 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 45 treesize of output 34 [2023-09-01 14:47:46,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-09-01 14:47:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:47:46,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112879637] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:47:46,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:47:46,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-09-01 14:47:46,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779259953] [2023-09-01 14:47:46,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:47:46,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 14:47:46,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:47:46,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 14:47:46,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2023-09-01 14:47:46,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 211 [2023-09-01 14:47:46,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 185 flow. Second operand has 14 states, 14 states have (on average 78.35714285714286) internal successors, (1097), 14 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:46,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:47:46,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 211 [2023-09-01 14:47:46,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:47:46,625 INFO L130 PetriNetUnfolder]: 148/276 cut-off events. [2023-09-01 14:47:46,625 INFO L131 PetriNetUnfolder]: For 280/280 co-relation queries the response was YES. [2023-09-01 14:47:46,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 276 events. 148/276 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1026 event pairs, 21 based on Foata normal form. 1/277 useless extension candidates. Maximal degree in co-relation 992. Up to 173 conditions per place. [2023-09-01 14:47:46,627 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 35 selfloop transitions, 9 changer transitions 9/53 dead transitions. [2023-09-01 14:47:46,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 53 transitions, 378 flow [2023-09-01 14:47:46,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:47:46,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:47:46,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 421 transitions. [2023-09-01 14:47:46,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990521327014218 [2023-09-01 14:47:46,628 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 421 transitions. [2023-09-01 14:47:46,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 421 transitions. [2023-09-01 14:47:46,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:47:46,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 421 transitions. [2023-09-01 14:47:46,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.2) internal successors, (421), 5 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:46,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:46,630 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:46,630 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 185 flow. Second operand 5 states and 421 transitions. [2023-09-01 14:47:46,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 53 transitions, 378 flow [2023-09-01 14:47:46,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 53 transitions, 362 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-09-01 14:47:46,633 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 204 flow [2023-09-01 14:47:46,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=32, 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=5, PETRI_FLOW=204, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-09-01 14:47:46,633 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 18 predicate places. [2023-09-01 14:47:46,634 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 204 flow [2023-09-01 14:47:46,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 78.35714285714286) internal successors, (1097), 14 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:46,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:47:46,634 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:47:46,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 14:47:46,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:47:46,839 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:47:46,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:47:46,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1479539105, now seen corresponding path program 3 times [2023-09-01 14:47:46,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:47:46,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568974866] [2023-09-01 14:47:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:47:46,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:47:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:47:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:47:46,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:47:46,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568974866] [2023-09-01 14:47:46,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568974866] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:47:46,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426797240] [2023-09-01 14:47:46,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:47:46,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:47:46,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:47:46,889 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:47:46,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 14:47:46,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:47:46,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:47:46,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 14:47:46,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:47:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:47:46,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:47:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:47:46,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426797240] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:47:46,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:47:46,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-09-01 14:47:46,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507771472] [2023-09-01 14:47:46,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:47:46,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:47:46,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:47:46,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:47:46,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:47:46,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-09-01 14:47:47,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:47,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:47:47,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-09-01 14:47:47,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:47:47,075 INFO L130 PetriNetUnfolder]: 248/479 cut-off events. [2023-09-01 14:47:47,075 INFO L131 PetriNetUnfolder]: For 941/941 co-relation queries the response was YES. [2023-09-01 14:47:47,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1767 conditions, 479 events. 248/479 cut-off events. For 941/941 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2155 event pairs, 80 based on Foata normal form. 18/497 useless extension candidates. Maximal degree in co-relation 1742. Up to 306 conditions per place. [2023-09-01 14:47:47,077 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 40 selfloop transitions, 12 changer transitions 3/55 dead transitions. [2023-09-01 14:47:47,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 446 flow [2023-09-01 14:47:47,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:47:47,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:47:47,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 421 transitions. [2023-09-01 14:47:47,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49881516587677727 [2023-09-01 14:47:47,079 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 421 transitions. [2023-09-01 14:47:47,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 421 transitions. [2023-09-01 14:47:47,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:47:47,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 421 transitions. [2023-09-01 14:47:47,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:47,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:47,081 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:47,081 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 204 flow. Second operand 4 states and 421 transitions. [2023-09-01 14:47:47,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 446 flow [2023-09-01 14:47:47,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 55 transitions, 417 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-09-01 14:47:47,085 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 287 flow [2023-09-01 14:47:47,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=287, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-09-01 14:47:47,087 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 20 predicate places. [2023-09-01 14:47:47,087 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 287 flow [2023-09-01 14:47:47,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:47,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:47:47,088 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:47:47,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 14:47:47,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:47:47,297 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:47:47,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:47:47,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1493740304, now seen corresponding path program 4 times [2023-09-01 14:47:47,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:47:47,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544549519] [2023-09-01 14:47:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:47:47,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:47:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:47:47,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:47:47,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:47:47,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544549519] [2023-09-01 14:47:47,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544549519] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:47:47,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295910411] [2023-09-01 14:47:47,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:47:47,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:47:47,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:47:47,411 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:47:47,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 14:47:47,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:47:47,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:47:47,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 14:47:47,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:47:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:47:47,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:47:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:47:47,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295910411] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:47:47,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:47:47,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-09-01 14:47:47,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362929115] [2023-09-01 14:47:47,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:47:47,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 14:47:47,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:47:47,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 14:47:47,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-09-01 14:47:47,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 211 [2023-09-01 14:47:47,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 287 flow. Second operand has 14 states, 14 states have (on average 89.64285714285714) internal successors, (1255), 14 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:47,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:47:47,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 211 [2023-09-01 14:47:47,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:47:47,902 INFO L130 PetriNetUnfolder]: 288/586 cut-off events. [2023-09-01 14:47:47,903 INFO L131 PetriNetUnfolder]: For 1450/1450 co-relation queries the response was YES. [2023-09-01 14:47:47,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2340 conditions, 586 events. 288/586 cut-off events. For 1450/1450 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2921 event pairs, 166 based on Foata normal form. 23/609 useless extension candidates. Maximal degree in co-relation 1829. Up to 455 conditions per place. [2023-09-01 14:47:47,905 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 34 selfloop transitions, 3 changer transitions 30/67 dead transitions. [2023-09-01 14:47:47,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 67 transitions, 579 flow [2023-09-01 14:47:47,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 14:47:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 14:47:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 654 transitions. [2023-09-01 14:47:47,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44278943805010157 [2023-09-01 14:47:47,907 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 654 transitions. [2023-09-01 14:47:47,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 654 transitions. [2023-09-01 14:47:47,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:47:47,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 654 transitions. [2023-09-01 14:47:47,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.42857142857143) internal successors, (654), 7 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:47,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:47,910 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:47,910 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 287 flow. Second operand 7 states and 654 transitions. [2023-09-01 14:47:47,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 67 transitions, 579 flow [2023-09-01 14:47:47,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 67 transitions, 569 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-09-01 14:47:47,913 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 311 flow [2023-09-01 14:47:47,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=311, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2023-09-01 14:47:47,914 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 30 predicate places. [2023-09-01 14:47:47,914 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 311 flow [2023-09-01 14:47:47,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 89.64285714285714) internal successors, (1255), 14 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:47,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:47:47,916 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:47:47,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 14:47:48,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:47:48,120 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:47:48,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:47:48,121 INFO L85 PathProgramCache]: Analyzing trace with hash 88962534, now seen corresponding path program 5 times [2023-09-01 14:47:48,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:47:48,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893644391] [2023-09-01 14:47:48,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:47:48,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:47:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:47:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:47:48,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:47:48,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893644391] [2023-09-01 14:47:48,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893644391] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:47:48,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487846766] [2023-09-01 14:47:48,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:47:48,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:47:48,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:47:48,405 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:47:48,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 14:47:48,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:47:48,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:47:48,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 14:47:48,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:47:48,620 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:47:48,620 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 21 treesize of output 10 [2023-09-01 14:47:48,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:47:48,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:47:48,666 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:47:48,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-09-01 14:47:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:47:48,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487846766] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:47:48,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:47:48,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 15 [2023-09-01 14:47:48,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962395978] [2023-09-01 14:47:48,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:47:48,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 14:47:48,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:47:48,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 14:47:48,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-09-01 14:47:48,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 211 [2023-09-01 14:47:48,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 311 flow. Second operand has 17 states, 17 states have (on average 86.58823529411765) internal successors, (1472), 17 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:48,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:47:48,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 211 [2023-09-01 14:47:48,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:47:49,413 INFO L130 PetriNetUnfolder]: 350/661 cut-off events. [2023-09-01 14:47:49,414 INFO L131 PetriNetUnfolder]: For 1370/1370 co-relation queries the response was YES. [2023-09-01 14:47:49,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2649 conditions, 661 events. 350/661 cut-off events. For 1370/1370 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3189 event pairs, 30 based on Foata normal form. 5/666 useless extension candidates. Maximal degree in co-relation 2614. Up to 422 conditions per place. [2023-09-01 14:47:49,417 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 69 selfloop transitions, 29 changer transitions 51/149 dead transitions. [2023-09-01 14:47:49,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 149 transitions, 1101 flow [2023-09-01 14:47:49,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 14:47:49,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 14:47:49,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1657 transitions. [2023-09-01 14:47:49,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43628225381779884 [2023-09-01 14:47:49,420 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1657 transitions. [2023-09-01 14:47:49,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1657 transitions. [2023-09-01 14:47:49,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:47:49,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1657 transitions. [2023-09-01 14:47:49,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 92.05555555555556) internal successors, (1657), 18 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:49,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:49,427 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:49,427 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 311 flow. Second operand 18 states and 1657 transitions. [2023-09-01 14:47:49,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 149 transitions, 1101 flow [2023-09-01 14:47:49,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 149 transitions, 1071 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-09-01 14:47:49,433 INFO L231 Difference]: Finished difference. Result has 64 places, 47 transitions, 486 flow [2023-09-01 14:47:49,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=486, PETRI_PLACES=64, PETRI_TRANSITIONS=47} [2023-09-01 14:47:49,434 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 45 predicate places. [2023-09-01 14:47:49,434 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 47 transitions, 486 flow [2023-09-01 14:47:49,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 86.58823529411765) internal successors, (1472), 17 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:49,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:47:49,435 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:47:49,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 14:47:49,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:47:49,644 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:47:49,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:47:49,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1904152626, now seen corresponding path program 6 times [2023-09-01 14:47:49,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:47:49,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248579452] [2023-09-01 14:47:49,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:47:49,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:47:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:47:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:47:49,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:47:49,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248579452] [2023-09-01 14:47:49,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248579452] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:47:49,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012548480] [2023-09-01 14:47:49,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:47:49,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:47:49,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:47:49,910 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:47:49,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 14:47:49,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 14:47:49,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:47:49,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 14:47:49,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:47:50,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:47:50,066 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 [2023-09-01 14:47:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:47:50,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:47:50,180 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:47:50,181 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 47 treesize of output 35 [2023-09-01 14:47:50,183 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 10 treesize of output 3 [2023-09-01 14:47:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:47:50,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012548480] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:47:50,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:47:50,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-09-01 14:47:50,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971260137] [2023-09-01 14:47:50,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:47:50,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 14:47:50,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:47:50,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 14:47:50,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=358, Unknown=3, NotChecked=0, Total=420 [2023-09-01 14:47:50,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 211 [2023-09-01 14:47:50,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 47 transitions, 486 flow. Second operand has 21 states, 21 states have (on average 84.14285714285714) internal successors, (1767), 21 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:50,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:47:50,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 211 [2023-09-01 14:47:50,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:47:50,741 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_~front~0 4))) (and (= (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset .cse0)) 5) (= 5 c_~x~0) (forall ((v_ArrVal_233 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_233) c_~queue~0.base) (+ c_~queue~0.offset .cse0 4)) 5)))) is different from false [2023-09-01 14:47:50,923 INFO L130 PetriNetUnfolder]: 486/934 cut-off events. [2023-09-01 14:47:50,923 INFO L131 PetriNetUnfolder]: For 2844/2844 co-relation queries the response was YES. [2023-09-01 14:47:50,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3923 conditions, 934 events. 486/934 cut-off events. For 2844/2844 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4929 event pairs, 52 based on Foata normal form. 1/935 useless extension candidates. Maximal degree in co-relation 3885. Up to 583 conditions per place. [2023-09-01 14:47:50,927 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 63 selfloop transitions, 38 changer transitions 35/136 dead transitions. [2023-09-01 14:47:50,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 136 transitions, 1230 flow [2023-09-01 14:47:50,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 14:47:50,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 14:47:50,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1256 transitions. [2023-09-01 14:47:50,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42518618821936355 [2023-09-01 14:47:50,930 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1256 transitions. [2023-09-01 14:47:50,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1256 transitions. [2023-09-01 14:47:50,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:47:50,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1256 transitions. [2023-09-01 14:47:50,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 89.71428571428571) internal successors, (1256), 14 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:50,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 211.0) internal successors, (3165), 15 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:50,936 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 211.0) internal successors, (3165), 15 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:50,936 INFO L175 Difference]: Start difference. First operand has 64 places, 47 transitions, 486 flow. Second operand 14 states and 1256 transitions. [2023-09-01 14:47:50,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 136 transitions, 1230 flow [2023-09-01 14:47:50,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 136 transitions, 1054 flow, removed 66 selfloop flow, removed 7 redundant places. [2023-09-01 14:47:50,943 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 621 flow [2023-09-01 14:47:50,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=621, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2023-09-01 14:47:50,944 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 53 predicate places. [2023-09-01 14:47:50,944 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 621 flow [2023-09-01 14:47:50,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 84.14285714285714) internal successors, (1767), 21 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:50,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:47:50,945 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:47:50,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-09-01 14:47:51,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:47:51,149 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:47:51,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:47:51,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1205721493, now seen corresponding path program 7 times [2023-09-01 14:47:51,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:47:51,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632102570] [2023-09-01 14:47:51,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:47:51,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:47:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:47:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:47:51,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:47:51,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632102570] [2023-09-01 14:47:51,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632102570] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:47:51,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088549363] [2023-09-01 14:47:51,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:47:51,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:47:51,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:47:51,202 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:47:51,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 14:47:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:47:51,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 14:47:51,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:47:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:47:51,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:47:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:47:51,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088549363] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:47:51,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:47:51,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-09-01 14:47:51,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132877799] [2023-09-01 14:47:51,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:47:51,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 14:47:51,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:47:51,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 14:47:51,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-09-01 14:47:51,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-09-01 14:47:51,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 621 flow. Second operand has 6 states, 6 states have (on average 100.33333333333333) internal successors, (602), 6 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:51,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:47:51,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-09-01 14:47:51,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:47:51,465 INFO L130 PetriNetUnfolder]: 840/1596 cut-off events. [2023-09-01 14:47:51,465 INFO L131 PetriNetUnfolder]: For 5254/5254 co-relation queries the response was YES. [2023-09-01 14:47:51,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7271 conditions, 1596 events. 840/1596 cut-off events. For 5254/5254 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9419 event pairs, 161 based on Foata normal form. 18/1614 useless extension candidates. Maximal degree in co-relation 7234. Up to 991 conditions per place. [2023-09-01 14:47:51,471 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 65 selfloop transitions, 45 changer transitions 4/114 dead transitions. [2023-09-01 14:47:51,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 114 transitions, 1310 flow [2023-09-01 14:47:51,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:47:51,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:47:51,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 528 transitions. [2023-09-01 14:47:51,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500473933649289 [2023-09-01 14:47:51,473 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 528 transitions. [2023-09-01 14:47:51,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 528 transitions. [2023-09-01 14:47:51,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:47:51,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 528 transitions. [2023-09-01 14:47:51,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.6) internal successors, (528), 5 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:51,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:51,475 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:51,475 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 621 flow. Second operand 5 states and 528 transitions. [2023-09-01 14:47:51,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 114 transitions, 1310 flow [2023-09-01 14:47:51,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 114 transitions, 1182 flow, removed 27 selfloop flow, removed 7 redundant places. [2023-09-01 14:47:51,485 INFO L231 Difference]: Finished difference. Result has 70 places, 85 transitions, 915 flow [2023-09-01 14:47:51,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=915, PETRI_PLACES=70, PETRI_TRANSITIONS=85} [2023-09-01 14:47:51,485 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 51 predicate places. [2023-09-01 14:47:51,485 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 85 transitions, 915 flow [2023-09-01 14:47:51,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 100.33333333333333) internal successors, (602), 6 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:51,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:47:51,486 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:47:51,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 14:47:51,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:47:51,691 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:47:51,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:47:51,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1918772906, now seen corresponding path program 8 times [2023-09-01 14:47:51,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:47:51,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020557357] [2023-09-01 14:47:51,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:47:51,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:47:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:47:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:47:51,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:47:51,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020557357] [2023-09-01 14:47:51,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020557357] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:47:51,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194128671] [2023-09-01 14:47:51,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:47:51,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:47:51,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:47:51,835 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:47:51,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 14:47:51,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:47:51,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:47:51,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 14:47:51,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:47:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:47:52,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:47:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:47:52,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194128671] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:47:52,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:47:52,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-09-01 14:47:52,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882214361] [2023-09-01 14:47:52,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:47:52,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 14:47:52,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:47:52,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 14:47:52,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2023-09-01 14:47:52,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 211 [2023-09-01 14:47:52,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 85 transitions, 915 flow. Second operand has 23 states, 23 states have (on average 88.78260869565217) internal successors, (2042), 23 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:52,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:47:52,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 211 [2023-09-01 14:47:52,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:47:52,746 INFO L130 PetriNetUnfolder]: 1013/1983 cut-off events. [2023-09-01 14:47:52,746 INFO L131 PetriNetUnfolder]: For 6338/6338 co-relation queries the response was YES. [2023-09-01 14:47:52,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9334 conditions, 1983 events. 1013/1983 cut-off events. For 6338/6338 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12659 event pairs, 557 based on Foata normal form. 52/2035 useless extension candidates. Maximal degree in co-relation 8051. Up to 1534 conditions per place. [2023-09-01 14:47:52,755 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 82 selfloop transitions, 4 changer transitions 70/156 dead transitions. [2023-09-01 14:47:52,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 156 transitions, 1700 flow [2023-09-01 14:47:52,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 14:47:52,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 14:47:52,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1123 transitions. [2023-09-01 14:47:52,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44352290679304895 [2023-09-01 14:47:52,758 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1123 transitions. [2023-09-01 14:47:52,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1123 transitions. [2023-09-01 14:47:52,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:47:52,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1123 transitions. [2023-09-01 14:47:52,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.58333333333333) internal successors, (1123), 12 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:52,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 211.0) internal successors, (2743), 13 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:52,762 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 211.0) internal successors, (2743), 13 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:52,762 INFO L175 Difference]: Start difference. First operand has 70 places, 85 transitions, 915 flow. Second operand 12 states and 1123 transitions. [2023-09-01 14:47:52,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 156 transitions, 1700 flow [2023-09-01 14:47:52,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 156 transitions, 1621 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-09-01 14:47:52,808 INFO L231 Difference]: Finished difference. Result has 86 places, 86 transitions, 931 flow [2023-09-01 14:47:52,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=863, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=931, PETRI_PLACES=86, PETRI_TRANSITIONS=86} [2023-09-01 14:47:52,809 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 67 predicate places. [2023-09-01 14:47:52,809 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 86 transitions, 931 flow [2023-09-01 14:47:52,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 88.78260869565217) internal successors, (2042), 23 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:52,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:47:52,810 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:47:52,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 14:47:53,017 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,SelfDestructingSolverStorable10 [2023-09-01 14:47:53,019 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:47:53,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:47:53,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1263742992, now seen corresponding path program 9 times [2023-09-01 14:47:53,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:47:53,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743050645] [2023-09-01 14:47:53,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:47:53,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:47:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:47:53,377 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:47:53,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:47:53,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743050645] [2023-09-01 14:47:53,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743050645] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:47:53,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503719899] [2023-09-01 14:47:53,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:47:53,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:47:53,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:47:53,379 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:47:53,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 14:47:53,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 14:47:53,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:47:53,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 14:47:53,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:47:53,706 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 [2023-09-01 14:47:53,732 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 [2023-09-01 14:47:53,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:47:53,983 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-09-01 14:47:53,984 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 26 treesize of output 10 [2023-09-01 14:47:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:47:53,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:47:54,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:47:54,417 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 63 treesize of output 51 [2023-09-01 14:47:54,426 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 14:47:54,426 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 152 treesize of output 138 [2023-09-01 14:47:54,434 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 14:47:54,434 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 133 treesize of output 103 [2023-09-01 14:47:54,442 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 14:47:54,442 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 82 treesize of output 67 [2023-09-01 14:47:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:47:54,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503719899] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:47:54,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:47:54,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2023-09-01 14:47:54,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509041669] [2023-09-01 14:47:54,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:47:54,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 14:47:54,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:47:54,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 14:47:54,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=783, Unknown=2, NotChecked=0, Total=930 [2023-09-01 14:47:56,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:47:57,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 211 [2023-09-01 14:47:57,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 86 transitions, 931 flow. Second operand has 31 states, 31 states have (on average 62.774193548387096) internal successors, (1946), 31 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:57,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:47:57,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 211 [2023-09-01 14:47:57,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:47:59,811 INFO L130 PetriNetUnfolder]: 1597/3061 cut-off events. [2023-09-01 14:47:59,811 INFO L131 PetriNetUnfolder]: For 9204/9204 co-relation queries the response was YES. [2023-09-01 14:47:59,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14170 conditions, 3061 events. 1597/3061 cut-off events. For 9204/9204 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20781 event pairs, 93 based on Foata normal form. 67/3128 useless extension candidates. Maximal degree in co-relation 14118. Up to 1891 conditions per place. [2023-09-01 14:47:59,826 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 95 selfloop transitions, 92 changer transitions 212/399 dead transitions. [2023-09-01 14:47:59,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 399 transitions, 3745 flow [2023-09-01 14:47:59,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-09-01 14:47:59,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-09-01 14:47:59,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2757 transitions. [2023-09-01 14:47:59,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32665876777251185 [2023-09-01 14:47:59,832 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2757 transitions. [2023-09-01 14:47:59,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2757 transitions. [2023-09-01 14:47:59,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:47:59,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2757 transitions. [2023-09-01 14:47:59,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 68.925) internal successors, (2757), 40 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:59,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 211.0) internal successors, (8651), 41 states have internal predecessors, (8651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:59,844 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 211.0) internal successors, (8651), 41 states have internal predecessors, (8651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:59,844 INFO L175 Difference]: Start difference. First operand has 86 places, 86 transitions, 931 flow. Second operand 40 states and 2757 transitions. [2023-09-01 14:47:59,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 399 transitions, 3745 flow [2023-09-01 14:47:59,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 399 transitions, 3619 flow, removed 60 selfloop flow, removed 10 redundant places. [2023-09-01 14:47:59,874 INFO L231 Difference]: Finished difference. Result has 118 places, 111 transitions, 1452 flow [2023-09-01 14:47:59,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1452, PETRI_PLACES=118, PETRI_TRANSITIONS=111} [2023-09-01 14:47:59,874 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 99 predicate places. [2023-09-01 14:47:59,874 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 111 transitions, 1452 flow [2023-09-01 14:47:59,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 62.774193548387096) internal successors, (1946), 31 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:59,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:47:59,875 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:47:59,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 14:48:00,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:48:00,081 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:48:00,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:48:00,081 INFO L85 PathProgramCache]: Analyzing trace with hash 205051960, now seen corresponding path program 10 times [2023-09-01 14:48:00,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:48:00,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252040178] [2023-09-01 14:48:00,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:48:00,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:48:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:48:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:48:00,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:48:00,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252040178] [2023-09-01 14:48:00,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252040178] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:48:00,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502137113] [2023-09-01 14:48:00,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:48:00,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:48:00,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:48:00,505 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:48:00,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 14:48:00,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:48:00,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:48:00,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 14:48:00,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:48:00,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:48:00,733 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 [2023-09-01 14:48:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:48:00,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:48:00,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:48:00,917 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 47 treesize of output 35 [2023-09-01 14:48:00,920 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 10 treesize of output 3 [2023-09-01 14:48:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:48:01,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502137113] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:48:01,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:48:01,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2023-09-01 14:48:01,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511137675] [2023-09-01 14:48:01,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:48:01,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 14:48:01,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:48:01,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 14:48:01,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2023-09-01 14:48:01,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 211 [2023-09-01 14:48:01,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 111 transitions, 1452 flow. Second operand has 30 states, 30 states have (on average 76.8) internal successors, (2304), 30 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:01,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:48:01,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 211 [2023-09-01 14:48:01,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:48:02,558 INFO L130 PetriNetUnfolder]: 1066/2007 cut-off events. [2023-09-01 14:48:02,558 INFO L131 PetriNetUnfolder]: For 8399/8399 co-relation queries the response was YES. [2023-09-01 14:48:02,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10221 conditions, 2007 events. 1066/2007 cut-off events. For 8399/8399 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 12343 event pairs, 52 based on Foata normal form. 1/2008 useless extension candidates. Maximal degree in co-relation 10155. Up to 1230 conditions per place. [2023-09-01 14:48:02,567 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 65 selfloop transitions, 93 changer transitions 44/202 dead transitions. [2023-09-01 14:48:02,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 202 transitions, 2346 flow [2023-09-01 14:48:02,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 14:48:02,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 14:48:02,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1477 transitions. [2023-09-01 14:48:02,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2023-09-01 14:48:02,574 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1477 transitions. [2023-09-01 14:48:02,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1477 transitions. [2023-09-01 14:48:02,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:48:02,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1477 transitions. [2023-09-01 14:48:02,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 82.05555555555556) internal successors, (1477), 18 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:02,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:02,581 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:02,581 INFO L175 Difference]: Start difference. First operand has 118 places, 111 transitions, 1452 flow. Second operand 18 states and 1477 transitions. [2023-09-01 14:48:02,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 202 transitions, 2346 flow [2023-09-01 14:48:02,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 202 transitions, 2061 flow, removed 48 selfloop flow, removed 15 redundant places. [2023-09-01 14:48:02,622 INFO L231 Difference]: Finished difference. Result has 110 places, 114 transitions, 1432 flow [2023-09-01 14:48:02,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1432, PETRI_PLACES=110, PETRI_TRANSITIONS=114} [2023-09-01 14:48:02,622 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 91 predicate places. [2023-09-01 14:48:02,622 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 114 transitions, 1432 flow [2023-09-01 14:48:02,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 76.8) internal successors, (2304), 30 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:02,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:48:02,623 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:48:02,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-09-01 14:48:02,828 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,SelfDestructingSolverStorable12 [2023-09-01 14:48:02,828 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:48:02,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:48:02,828 INFO L85 PathProgramCache]: Analyzing trace with hash 290459673, now seen corresponding path program 11 times [2023-09-01 14:48:02,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:48:02,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44433131] [2023-09-01 14:48:02,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:48:02,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:48:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:48:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:48:02,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:48:02,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44433131] [2023-09-01 14:48:02,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44433131] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:48:02,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060732972] [2023-09-01 14:48:02,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:48:02,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:48:02,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:48:02,905 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:48:02,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 14:48:02,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:48:02,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:48:02,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 14:48:02,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:48:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:48:03,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:48:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:48:03,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060732972] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:48:03,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:48:03,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-09-01 14:48:03,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231137433] [2023-09-01 14:48:03,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:48:03,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 14:48:03,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:48:03,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 14:48:03,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-09-01 14:48:03,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-09-01 14:48:03,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 114 transitions, 1432 flow. Second operand has 6 states, 6 states have (on average 99.33333333333333) internal successors, (596), 6 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) [2023-09-01 14:48:03,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:48:03,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-09-01 14:48:03,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:48:03,391 INFO L130 PetriNetUnfolder]: 2058/3848 cut-off events. [2023-09-01 14:48:03,391 INFO L131 PetriNetUnfolder]: For 16564/16564 co-relation queries the response was YES. [2023-09-01 14:48:03,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18595 conditions, 3848 events. 2058/3848 cut-off events. For 16564/16564 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 26569 event pairs, 336 based on Foata normal form. 18/3866 useless extension candidates. Maximal degree in co-relation 18549. Up to 2364 conditions per place. [2023-09-01 14:48:03,409 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 93 selfloop transitions, 122 changer transitions 0/215 dead transitions. [2023-09-01 14:48:03,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 215 transitions, 3102 flow [2023-09-01 14:48:03,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:48:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:48:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 635 transitions. [2023-09-01 14:48:03,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5015797788309637 [2023-09-01 14:48:03,410 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 635 transitions. [2023-09-01 14:48:03,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 635 transitions. [2023-09-01 14:48:03,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:48:03,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 635 transitions. [2023-09-01 14:48:03,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:03,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 211.0) internal successors, (1477), 7 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:03,412 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 211.0) internal successors, (1477), 7 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:03,412 INFO L175 Difference]: Start difference. First operand has 110 places, 114 transitions, 1432 flow. Second operand 6 states and 635 transitions. [2023-09-01 14:48:03,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 215 transitions, 3102 flow [2023-09-01 14:48:03,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 215 transitions, 2975 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-09-01 14:48:03,439 INFO L231 Difference]: Finished difference. Result has 107 places, 182 transitions, 2658 flow [2023-09-01 14:48:03,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=1354, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2658, PETRI_PLACES=107, PETRI_TRANSITIONS=182} [2023-09-01 14:48:03,440 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 88 predicate places. [2023-09-01 14:48:03,440 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 182 transitions, 2658 flow [2023-09-01 14:48:03,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 99.33333333333333) internal successors, (596), 6 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) [2023-09-01 14:48:03,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:48:03,440 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:48:03,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-09-01 14:48:03,645 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,SelfDestructingSolverStorable13 [2023-09-01 14:48:03,645 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:48:03,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:48:03,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1809702648, now seen corresponding path program 12 times [2023-09-01 14:48:03,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:48:03,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703669031] [2023-09-01 14:48:03,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:48:03,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:48:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:48:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:48:04,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:48:04,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703669031] [2023-09-01 14:48:04,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703669031] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:48:04,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448553132] [2023-09-01 14:48:04,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:48:04,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:48:04,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:48:04,064 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:48:04,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 14:48:04,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 14:48:04,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:48:04,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 14:48:04,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:48:04,304 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 [2023-09-01 14:48:04,338 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 [2023-09-01 14:48:04,374 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 [2023-09-01 14:48:04,597 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:48:04,597 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 22 treesize of output 10 [2023-09-01 14:48:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:48:04,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:48:05,153 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:48:05,154 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 65 treesize of output 53 [2023-09-01 14:48:05,162 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:48:05,162 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 160 treesize of output 142 [2023-09-01 14:48:05,169 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 14:48:05,169 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 139 treesize of output 105 [2023-09-01 14:48:05,177 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 14:48:05,177 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 84 treesize of output 67 [2023-09-01 14:48:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:48:05,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448553132] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:48:05,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:48:05,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 41 [2023-09-01 14:48:05,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46666221] [2023-09-01 14:48:05,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:48:05,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-09-01 14:48:05,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:48:05,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-09-01 14:48:05,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1605, Unknown=1, NotChecked=0, Total=1806 [2023-09-01 14:48:07,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 211 [2023-09-01 14:48:07,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 182 transitions, 2658 flow. Second operand has 43 states, 43 states have (on average 62.348837209302324) internal successors, (2681), 43 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:07,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:48:07,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 211 [2023-09-01 14:48:07,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:48:14,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:48:16,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:48:31,652 INFO L130 PetriNetUnfolder]: 8591/16018 cut-off events. [2023-09-01 14:48:31,652 INFO L131 PetriNetUnfolder]: For 70405/70405 co-relation queries the response was YES. [2023-09-01 14:48:31,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80744 conditions, 16018 events. 8591/16018 cut-off events. For 70405/70405 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 138059 event pairs, 300 based on Foata normal form. 168/16186 useless extension candidates. Maximal degree in co-relation 67529. Up to 9851 conditions per place. [2023-09-01 14:48:31,770 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 608 selfloop transitions, 711 changer transitions 324/1643 dead transitions. [2023-09-01 14:48:31,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 1643 transitions, 18837 flow [2023-09-01 14:48:31,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2023-09-01 14:48:31,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2023-09-01 14:48:31,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 9863 transitions. [2023-09-01 14:48:31,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32918363260129496 [2023-09-01 14:48:31,785 INFO L72 ComplementDD]: Start complementDD. Operand 142 states and 9863 transitions. [2023-09-01 14:48:31,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 142 states and 9863 transitions. [2023-09-01 14:48:31,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:48:31,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 142 states and 9863 transitions. [2023-09-01 14:48:31,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 143 states, 142 states have (on average 69.45774647887323) internal successors, (9863), 142 states have internal predecessors, (9863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:31,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 143 states, 143 states have (on average 211.0) internal successors, (30173), 143 states have internal predecessors, (30173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:31,828 INFO L81 ComplementDD]: Finished complementDD. Result has 143 states, 143 states have (on average 211.0) internal successors, (30173), 143 states have internal predecessors, (30173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:31,829 INFO L175 Difference]: Start difference. First operand has 107 places, 182 transitions, 2658 flow. Second operand 142 states and 9863 transitions. [2023-09-01 14:48:31,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 1643 transitions, 18837 flow [2023-09-01 14:48:32,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 1643 transitions, 18553 flow, removed 142 selfloop flow, removed 0 redundant places. [2023-09-01 14:48:32,015 INFO L231 Difference]: Finished difference. Result has 326 places, 737 transitions, 12959 flow [2023-09-01 14:48:32,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=2592, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=142, PETRI_FLOW=12959, PETRI_PLACES=326, PETRI_TRANSITIONS=737} [2023-09-01 14:48:32,016 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 307 predicate places. [2023-09-01 14:48:32,016 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 737 transitions, 12959 flow [2023-09-01 14:48:32,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 62.348837209302324) internal successors, (2681), 43 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:32,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:48:32,016 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:48:32,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-09-01 14:48:32,224 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,SelfDestructingSolverStorable14 [2023-09-01 14:48:32,226 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:48:32,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:48:32,226 INFO L85 PathProgramCache]: Analyzing trace with hash -139368886, now seen corresponding path program 13 times [2023-09-01 14:48:32,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:48:32,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138678725] [2023-09-01 14:48:32,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:48:32,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:48:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:48:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:48:32,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:48:32,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138678725] [2023-09-01 14:48:32,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138678725] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:48:32,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075314094] [2023-09-01 14:48:32,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:48:32,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:48:32,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:48:32,656 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:48:32,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 14:48:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:48:32,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 14:48:32,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:48:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:48:32,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:48:33,022 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:48:33,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-09-01 14:48:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:48:33,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075314094] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:48:33,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:48:33,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-09-01 14:48:33,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020068041] [2023-09-01 14:48:33,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:48:33,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 14:48:33,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:48:33,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 14:48:33,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2023-09-01 14:48:33,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 211 [2023-09-01 14:48:33,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 737 transitions, 12959 flow. Second operand has 33 states, 33 states have (on average 85.81818181818181) internal successors, (2832), 33 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:33,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:48:33,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 211 [2023-09-01 14:48:33,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:48:39,365 INFO L130 PetriNetUnfolder]: 9459/17584 cut-off events. [2023-09-01 14:48:39,365 INFO L131 PetriNetUnfolder]: For 1085152/1085152 co-relation queries the response was YES. [2023-09-01 14:48:39,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133567 conditions, 17584 events. 9459/17584 cut-off events. For 1085152/1085152 co-relation queries the response was YES. Maximal size of possible extension queue 1019. Compared 152422 event pairs, 1145 based on Foata normal form. 37/17621 useless extension candidates. Maximal degree in co-relation 131935. Up to 10837 conditions per place. [2023-09-01 14:48:39,511 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 314 selfloop transitions, 707 changer transitions 163/1184 dead transitions. [2023-09-01 14:48:39,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 1184 transitions, 20985 flow [2023-09-01 14:48:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-09-01 14:48:39,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-09-01 14:48:39,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4870 transitions. [2023-09-01 14:48:39,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435482428686399 [2023-09-01 14:48:39,515 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4870 transitions. [2023-09-01 14:48:39,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4870 transitions. [2023-09-01 14:48:39,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:48:39,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4870 transitions. [2023-09-01 14:48:39,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 91.88679245283019) internal successors, (4870), 53 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:39,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 211.0) internal successors, (11394), 54 states have internal predecessors, (11394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:39,527 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 211.0) internal successors, (11394), 54 states have internal predecessors, (11394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:39,527 INFO L175 Difference]: Start difference. First operand has 326 places, 737 transitions, 12959 flow. Second operand 53 states and 4870 transitions. [2023-09-01 14:48:39,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 1184 transitions, 20985 flow [2023-09-01 14:48:50,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 1184 transitions, 19327 flow, removed 738 selfloop flow, removed 6 redundant places. [2023-09-01 14:48:50,205 INFO L231 Difference]: Finished difference. Result has 384 places, 824 transitions, 15285 flow [2023-09-01 14:48:50,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=11700, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=629, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=15285, PETRI_PLACES=384, PETRI_TRANSITIONS=824} [2023-09-01 14:48:50,206 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 365 predicate places. [2023-09-01 14:48:50,206 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 824 transitions, 15285 flow [2023-09-01 14:48:50,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 85.81818181818181) internal successors, (2832), 33 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:50,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:48:50,207 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:48:50,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 14:48:50,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 14:48:50,407 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:48:50,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:48:50,408 INFO L85 PathProgramCache]: Analyzing trace with hash 779977742, now seen corresponding path program 14 times [2023-09-01 14:48:50,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:48:50,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947851939] [2023-09-01 14:48:50,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:48:50,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:48:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:48:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:48:51,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:48:51,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947851939] [2023-09-01 14:48:51,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947851939] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:48:51,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063291804] [2023-09-01 14:48:51,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:48:51,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:48:51,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:48:51,125 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:48:51,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 14:48:51,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:48:51,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:48:51,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 14:48:51,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:48:51,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:48:51,420 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 [2023-09-01 14:48:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:48:51,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:48:51,627 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_559 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_559) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 12)))) is different from false [2023-09-01 14:48:51,636 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:48:51,636 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 47 treesize of output 35 [2023-09-01 14:48:51,639 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 10 treesize of output 3 [2023-09-01 14:48:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 4 not checked. [2023-09-01 14:48:51,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063291804] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:48:51,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:48:51,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-09-01 14:48:51,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534621044] [2023-09-01 14:48:51,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:48:51,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-09-01 14:48:51,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:48:51,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-09-01 14:48:51,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1170, Unknown=1, NotChecked=68, Total=1332 [2023-09-01 14:48:51,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 211 [2023-09-01 14:48:51,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 824 transitions, 15285 flow. Second operand has 37 states, 37 states have (on average 68.62162162162163) internal successors, (2539), 37 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:51,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:48:51,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 211 [2023-09-01 14:48:51,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:48:58,101 INFO L130 PetriNetUnfolder]: 10741/19640 cut-off events. [2023-09-01 14:48:58,101 INFO L131 PetriNetUnfolder]: For 1436966/1436966 co-relation queries the response was YES. [2023-09-01 14:48:58,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163118 conditions, 19640 events. 10741/19640 cut-off events. For 1436966/1436966 co-relation queries the response was YES. Maximal size of possible extension queue 1130. Compared 169507 event pairs, 1119 based on Foata normal form. 12/19652 useless extension candidates. Maximal degree in co-relation 162978. Up to 12301 conditions per place. [2023-09-01 14:48:58,357 INFO L137 encePairwiseOnDemand]: 201/211 looper letters, 175 selfloop transitions, 828 changer transitions 60/1063 dead transitions. [2023-09-01 14:48:58,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 1063 transitions, 21290 flow [2023-09-01 14:48:58,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 14:48:58,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 14:48:58,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1851 transitions. [2023-09-01 14:48:58,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3509004739336493 [2023-09-01 14:48:58,361 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1851 transitions. [2023-09-01 14:48:58,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1851 transitions. [2023-09-01 14:48:58,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:48:58,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1851 transitions. [2023-09-01 14:48:58,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 74.04) internal successors, (1851), 25 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:58,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 211.0) internal successors, (5486), 26 states have internal predecessors, (5486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:58,366 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 211.0) internal successors, (5486), 26 states have internal predecessors, (5486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:58,366 INFO L175 Difference]: Start difference. First operand has 384 places, 824 transitions, 15285 flow. Second operand 25 states and 1851 transitions. [2023-09-01 14:48:58,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 1063 transitions, 21290 flow [2023-09-01 14:49:10,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 1063 transitions, 20037 flow, removed 118 selfloop flow, removed 26 redundant places. [2023-09-01 14:49:10,382 INFO L231 Difference]: Finished difference. Result has 385 places, 930 transitions, 18275 flow [2023-09-01 14:49:10,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=14045, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=722, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=18275, PETRI_PLACES=385, PETRI_TRANSITIONS=930} [2023-09-01 14:49:10,383 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 366 predicate places. [2023-09-01 14:49:10,383 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 930 transitions, 18275 flow [2023-09-01 14:49:10,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 68.62162162162163) internal successors, (2539), 37 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:49:10,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:49:10,383 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:49:10,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-09-01 14:49:10,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:49:10,588 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:49:10,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:49:10,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1070764383, now seen corresponding path program 15 times [2023-09-01 14:49:10,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:49:10,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960953776] [2023-09-01 14:49:10,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:49:10,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:49:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:49:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:49:10,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:49:10,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960953776] [2023-09-01 14:49:10,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960953776] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:49:10,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289183312] [2023-09-01 14:49:10,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:49:10,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:49:10,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:49:10,666 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:49:10,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 14:49:10,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 14:49:10,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:49:10,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 76 conjunts are in the unsatisfiable core [2023-09-01 14:49:10,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:49:10,892 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 [2023-09-01 14:49:10,920 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 [2023-09-01 14:49:10,948 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 [2023-09-01 14:49:11,159 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-09-01 14:49:11,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 16 [2023-09-01 14:49:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:49:11,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:49:11,454 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_605 (Array Int Int)) (v_~front~0_147 Int)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_605) c_~queue~0.base)) (.cse1 (* c_~size~0 4)) (.cse2 (* c_~front~0 4))) (or (= (select .cse0 (+ c_~queue~0.offset (* v_~front~0_147 4) 4)) 5) (not (= (select .cse0 (+ .cse1 c_~queue~0.offset .cse2 12)) 5)) (not (= (select .cse0 (+ .cse1 c_~queue~0.offset .cse2 8)) 5)) (< v_~front~0_147 0) (not (= 5 (select .cse0 (+ .cse1 c_~queue~0.offset .cse2 4)))) (<= c_~n~0 (+ v_~front~0_147 1))))) is different from false [2023-09-01 14:49:11,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:49:11,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 97 [2023-09-01 14:49:11,552 INFO L321 Elim1Store]: treesize reduction 15, result has 54.5 percent of original size [2023-09-01 14:49:11,552 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 336 treesize of output 308 [2023-09-01 14:49:11,568 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-09-01 14:49:11,568 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 291 treesize of output 217 [2023-09-01 14:49:11,578 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-09-01 14:49:11,579 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 196 treesize of output 159 [2023-09-01 14:49:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:49:11,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289183312] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:49:11,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:49:11,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 14, 13] total 32 [2023-09-01 14:49:11,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729495419] [2023-09-01 14:49:11,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:49:11,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 14:49:11,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:49:11,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 14:49:11,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=809, Unknown=1, NotChecked=60, Total=1056 [2023-09-01 14:49:11,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 211 [2023-09-01 14:49:11,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 930 transitions, 18275 flow. Second operand has 33 states, 33 states have (on average 63.0) internal successors, (2079), 33 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:49:11,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:49:11,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 211 [2023-09-01 14:49:11,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:49:28,508 INFO L130 PetriNetUnfolder]: 22749/42342 cut-off events. [2023-09-01 14:49:28,508 INFO L131 PetriNetUnfolder]: For 2832658/2832658 co-relation queries the response was YES. [2023-09-01 14:49:28,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421022 conditions, 42342 events. 22749/42342 cut-off events. For 2832658/2832658 co-relation queries the response was YES. Maximal size of possible extension queue 2489. Compared 417051 event pairs, 3249 based on Foata normal form. 124/42466 useless extension candidates. Maximal degree in co-relation 420887. Up to 26047 conditions per place. [2023-09-01 14:49:29,066 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 411 selfloop transitions, 886 changer transitions 1077/2374 dead transitions. [2023-09-01 14:49:29,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 2374 transitions, 48941 flow [2023-09-01 14:49:29,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-09-01 14:49:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-09-01 14:49:29,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4689 transitions. [2023-09-01 14:49:29,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3268051296347923 [2023-09-01 14:49:29,071 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4689 transitions. [2023-09-01 14:49:29,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4689 transitions. [2023-09-01 14:49:29,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:49:29,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4689 transitions. [2023-09-01 14:49:29,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 68.95588235294117) internal successors, (4689), 68 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:49:29,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 211.0) internal successors, (14559), 69 states have internal predecessors, (14559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:49:29,083 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 211.0) internal successors, (14559), 69 states have internal predecessors, (14559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:49:29,083 INFO L175 Difference]: Start difference. First operand has 385 places, 930 transitions, 18275 flow. Second operand 68 states and 4689 transitions. [2023-09-01 14:49:29,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 2374 transitions, 48941 flow [2023-09-01 14:49:51,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 2374 transitions, 45262 flow, removed 688 selfloop flow, removed 18 redundant places. [2023-09-01 14:49:51,304 INFO L231 Difference]: Finished difference. Result has 454 places, 1247 transitions, 26433 flow [2023-09-01 14:49:51,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=16503, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=501, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=26433, PETRI_PLACES=454, PETRI_TRANSITIONS=1247} [2023-09-01 14:49:51,305 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 435 predicate places. [2023-09-01 14:49:51,305 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 1247 transitions, 26433 flow [2023-09-01 14:49:51,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 63.0) internal successors, (2079), 33 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:49:51,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:49:51,306 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:49:51,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 14:49:51,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 14:49:51,506 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:49:51,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:49:51,506 INFO L85 PathProgramCache]: Analyzing trace with hash -527780414, now seen corresponding path program 16 times [2023-09-01 14:49:51,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:49:51,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435322290] [2023-09-01 14:49:51,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:49:51,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:49:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:49:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 14:49:51,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:49:51,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435322290] [2023-09-01 14:49:51,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435322290] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:49:51,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51288604] [2023-09-01 14:49:51,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:49:51,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:49:51,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:49:51,693 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:49:51,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 14:49:51,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:49:51,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:49:51,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 14:49:51,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:49:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:49:52,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:49:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 14:49:52,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51288604] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:49:52,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:49:52,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 34 [2023-09-01 14:49:52,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949822854] [2023-09-01 14:49:52,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:49:52,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 14:49:52,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:49:52,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 14:49:52,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=871, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 14:49:52,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 211 [2023-09-01 14:49:52,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 1247 transitions, 26433 flow. Second operand has 35 states, 35 states have (on average 88.57142857142857) internal successors, (3100), 35 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:49:52,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:49:52,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 211 [2023-09-01 14:49:52,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:49:58,107 INFO L130 PetriNetUnfolder]: 7993/15078 cut-off events. [2023-09-01 14:49:58,108 INFO L131 PetriNetUnfolder]: For 1101641/1101641 co-relation queries the response was YES. [2023-09-01 14:49:58,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149742 conditions, 15078 events. 7993/15078 cut-off events. For 1101641/1101641 co-relation queries the response was YES. Maximal size of possible extension queue 913. Compared 132728 event pairs, 4749 based on Foata normal form. 141/15219 useless extension candidates. Maximal degree in co-relation 149605. Up to 13633 conditions per place. [2023-09-01 14:49:58,263 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 613 selfloop transitions, 6 changer transitions 169/788 dead transitions. [2023-09-01 14:49:58,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 788 transitions, 17736 flow [2023-09-01 14:49:58,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 14:49:58,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 14:49:58,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2155 transitions. [2023-09-01 14:49:58,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4440552235730476 [2023-09-01 14:49:58,266 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2155 transitions. [2023-09-01 14:49:58,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2155 transitions. [2023-09-01 14:49:58,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:49:58,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2155 transitions. [2023-09-01 14:49:58,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 93.69565217391305) internal successors, (2155), 23 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:49:58,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 211.0) internal successors, (5064), 24 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:49:58,270 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 211.0) internal successors, (5064), 24 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:49:58,270 INFO L175 Difference]: Start difference. First operand has 454 places, 1247 transitions, 26433 flow. Second operand 23 states and 2155 transitions. [2023-09-01 14:49:58,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 788 transitions, 17736 flow [2023-09-01 14:50:10,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 788 transitions, 16237 flow, removed 583 selfloop flow, removed 63 redundant places. [2023-09-01 14:50:10,772 INFO L231 Difference]: Finished difference. Result has 314 places, 619 transitions, 12967 flow [2023-09-01 14:50:10,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=13990, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12967, PETRI_PLACES=314, PETRI_TRANSITIONS=619} [2023-09-01 14:50:10,773 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 295 predicate places. [2023-09-01 14:50:10,773 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 619 transitions, 12967 flow [2023-09-01 14:50:10,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 88.57142857142857) internal successors, (3100), 35 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:50:10,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:50:10,774 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:50:10,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 14:50:10,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:50:10,974 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:50:10,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:50:10,974 INFO L85 PathProgramCache]: Analyzing trace with hash -338254250, now seen corresponding path program 17 times [2023-09-01 14:50:10,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:50:10,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249496834] [2023-09-01 14:50:10,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:50:10,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:50:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:50:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:50:11,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:50:11,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249496834] [2023-09-01 14:50:11,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249496834] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:50:11,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083316797] [2023-09-01 14:50:11,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:50:11,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:50:11,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:50:11,534 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:50:11,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 14:50:11,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 14:50:11,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:50:11,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 46 conjunts are in the unsatisfiable core [2023-09-01 14:50:11,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:50:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:50:12,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:50:12,159 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:50:12,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-09-01 14:50:12,287 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 14:50:12,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083316797] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:50:12,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:50:12,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 11] total 41 [2023-09-01 14:50:12,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681647915] [2023-09-01 14:50:12,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:50:12,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-09-01 14:50:12,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:50:12,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-09-01 14:50:12,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1682, Unknown=0, NotChecked=0, Total=1806 [2023-09-01 14:50:13,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 211 [2023-09-01 14:50:13,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 619 transitions, 12967 flow. Second operand has 43 states, 43 states have (on average 85.65116279069767) internal successors, (3683), 43 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:50:13,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:50:13,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 211 [2023-09-01 14:50:13,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:50:18,951 INFO L130 PetriNetUnfolder]: 9200/17044 cut-off events. [2023-09-01 14:50:18,951 INFO L131 PetriNetUnfolder]: For 269351/269351 co-relation queries the response was YES. [2023-09-01 14:50:19,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129035 conditions, 17044 events. 9200/17044 cut-off events. For 269351/269351 co-relation queries the response was YES. Maximal size of possible extension queue 1095. Compared 147890 event pairs, 735 based on Foata normal form. 11/17055 useless extension candidates. Maximal degree in co-relation 128950. Up to 10508 conditions per place. [2023-09-01 14:50:19,063 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 278 selfloop transitions, 733 changer transitions 240/1251 dead transitions. [2023-09-01 14:50:19,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 1251 transitions, 22796 flow [2023-09-01 14:50:19,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-09-01 14:50:19,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-09-01 14:50:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 6989 transitions. [2023-09-01 14:50:19,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43583187827388375 [2023-09-01 14:50:19,067 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 6989 transitions. [2023-09-01 14:50:19,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 6989 transitions. [2023-09-01 14:50:19,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:50:19,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 6989 transitions. [2023-09-01 14:50:19,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 91.96052631578948) internal successors, (6989), 76 states have internal predecessors, (6989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:50:19,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 211.0) internal successors, (16247), 77 states have internal predecessors, (16247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:50:19,081 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 211.0) internal successors, (16247), 77 states have internal predecessors, (16247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:50:19,081 INFO L175 Difference]: Start difference. First operand has 314 places, 619 transitions, 12967 flow. Second operand 76 states and 6989 transitions. [2023-09-01 14:50:19,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 1251 transitions, 22796 flow [2023-09-01 14:50:21,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1251 transitions, 22110 flow, removed 272 selfloop flow, removed 30 redundant places. [2023-09-01 14:50:21,945 INFO L231 Difference]: Finished difference. Result has 321 places, 765 transitions, 18180 flow [2023-09-01 14:50:21,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=12735, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=592, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=18180, PETRI_PLACES=321, PETRI_TRANSITIONS=765} [2023-09-01 14:50:21,946 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 302 predicate places. [2023-09-01 14:50:21,946 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 765 transitions, 18180 flow [2023-09-01 14:50:21,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 85.65116279069767) internal successors, (3683), 43 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:50:21,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:50:21,947 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:50:21,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-09-01 14:50:22,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:50:22,147 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:50:22,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:50:22,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1419600050, now seen corresponding path program 18 times [2023-09-01 14:50:22,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:50:22,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146155987] [2023-09-01 14:50:22,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:50:22,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:50:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:50:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:50:22,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:50:22,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146155987] [2023-09-01 14:50:22,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146155987] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:50:22,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218150897] [2023-09-01 14:50:22,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:50:22,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:50:22,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:50:22,719 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:50:22,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 14:50:23,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 14:50:23,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:50:23,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 60 conjunts are in the unsatisfiable core [2023-09-01 14:50:23,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:50:23,313 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 [2023-09-01 14:50:23,357 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 [2023-09-01 14:50:23,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:50:23,476 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 [2023-09-01 14:50:23,729 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:50:23,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:50:23,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-09-01 14:50:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:50:23,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:50:24,143 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:50:24,143 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 61 treesize of output 49 [2023-09-01 14:50:24,150 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:50:24,150 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 98 [2023-09-01 14:50:24,154 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 63 treesize of output 49 [2023-09-01 14:50:24,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:50:24,162 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 55 treesize of output 47 [2023-09-01 14:50:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:50:24,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218150897] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:50:24,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:50:24,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 44 [2023-09-01 14:50:24,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299938020] [2023-09-01 14:50:24,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:50:24,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-09-01 14:50:24,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:50:24,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-09-01 14:50:24,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1846, Unknown=0, NotChecked=0, Total=2070 [2023-09-01 14:50:26,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 211 [2023-09-01 14:50:26,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 765 transitions, 18180 flow. Second operand has 46 states, 46 states have (on average 75.5) internal successors, (3473), 46 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:50:26,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:50:26,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 211 [2023-09-01 14:50:26,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:50:42,136 INFO L130 PetriNetUnfolder]: 20457/37922 cut-off events. [2023-09-01 14:50:42,136 INFO L131 PetriNetUnfolder]: For 570205/570205 co-relation queries the response was YES. [2023-09-01 14:50:42,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288343 conditions, 37922 events. 20457/37922 cut-off events. For 570205/570205 co-relation queries the response was YES. Maximal size of possible extension queue 2478. Compared 371893 event pairs, 1685 based on Foata normal form. 8/37930 useless extension candidates. Maximal degree in co-relation 288260. Up to 23391 conditions per place. [2023-09-01 14:50:42,565 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 288 selfloop transitions, 1682 changer transitions 222/2192 dead transitions. [2023-09-01 14:50:42,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 2192 transitions, 49356 flow [2023-09-01 14:50:42,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-09-01 14:50:42,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-09-01 14:50:42,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 6132 transitions. [2023-09-01 14:50:42,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38748815165876777 [2023-09-01 14:50:42,569 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 6132 transitions. [2023-09-01 14:50:42,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 6132 transitions. [2023-09-01 14:50:42,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:50:42,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 6132 transitions. [2023-09-01 14:50:42,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 81.76) internal successors, (6132), 75 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:50:42,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 211.0) internal successors, (16036), 76 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:50:42,584 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 211.0) internal successors, (16036), 76 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:50:42,584 INFO L175 Difference]: Start difference. First operand has 321 places, 765 transitions, 18180 flow. Second operand 75 states and 6132 transitions. [2023-09-01 14:50:42,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 2192 transitions, 49356 flow [2023-09-01 14:50:49,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 2192 transitions, 45081 flow, removed 525 selfloop flow, removed 31 redundant places. [2023-09-01 14:50:49,104 INFO L231 Difference]: Finished difference. Result has 380 places, 1716 transitions, 40348 flow [2023-09-01 14:50:49,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=16430, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=733, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=40348, PETRI_PLACES=380, PETRI_TRANSITIONS=1716} [2023-09-01 14:50:49,105 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 361 predicate places. [2023-09-01 14:50:49,105 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 1716 transitions, 40348 flow [2023-09-01 14:50:49,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 75.5) internal successors, (3473), 46 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:50:49,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:50:49,106 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:50:49,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-09-01 14:50:49,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:50:49,311 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:50:49,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:50:49,311 INFO L85 PathProgramCache]: Analyzing trace with hash -46687399, now seen corresponding path program 19 times [2023-09-01 14:50:49,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:50:49,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222176406] [2023-09-01 14:50:49,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:50:49,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:50:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:50:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-09-01 14:50:49,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:50:49,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222176406] [2023-09-01 14:50:49,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222176406] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:50:49,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219671818] [2023-09-01 14:50:49,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:50:49,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:50:49,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:50:49,422 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:50:49,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 14:50:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:50:49,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 14:50:49,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:50:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-09-01 14:50:49,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:50:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-09-01 14:50:49,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219671818] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:50:49,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:50:49,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2023-09-01 14:50:49,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015544114] [2023-09-01 14:50:49,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:50:49,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 14:50:49,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:50:49,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 14:50:49,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-09-01 14:50:49,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-09-01 14:50:49,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 1716 transitions, 40348 flow. Second operand has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:50:49,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:50:49,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-09-01 14:50:49,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:51:13,512 INFO L130 PetriNetUnfolder]: 34925/64331 cut-off events. [2023-09-01 14:51:13,513 INFO L131 PetriNetUnfolder]: For 1304326/1304326 co-relation queries the response was YES. [2023-09-01 14:51:14,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532356 conditions, 64331 events. 34925/64331 cut-off events. For 1304326/1304326 co-relation queries the response was YES. Maximal size of possible extension queue 3928. Compared 665815 event pairs, 4994 based on Foata normal form. 72/64403 useless extension candidates. Maximal degree in co-relation 532262. Up to 39725 conditions per place. [2023-09-01 14:51:14,535 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 686 selfloop transitions, 2024 changer transitions 0/2710 dead transitions. [2023-09-01 14:51:14,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 2710 transitions, 69850 flow [2023-09-01 14:51:14,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 14:51:14,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 14:51:14,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 849 transitions. [2023-09-01 14:51:14,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029620853080569 [2023-09-01 14:51:14,537 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 849 transitions. [2023-09-01 14:51:14,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 849 transitions. [2023-09-01 14:51:14,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:51:14,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 849 transitions. [2023-09-01 14:51:14,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 106.125) internal successors, (849), 8 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:51:14,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 211.0) internal successors, (1899), 9 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:51:14,539 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 211.0) internal successors, (1899), 9 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:51:14,539 INFO L175 Difference]: Start difference. First operand has 380 places, 1716 transitions, 40348 flow. Second operand 8 states and 849 transitions. [2023-09-01 14:51:14,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 2710 transitions, 69850 flow [2023-09-01 14:51:33,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 2710 transitions, 68403 flow, removed 717 selfloop flow, removed 6 redundant places. [2023-09-01 14:51:33,770 INFO L231 Difference]: Finished difference. Result has 387 places, 2661 transitions, 71364 flow [2023-09-01 14:51:33,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=39759, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=71364, PETRI_PLACES=387, PETRI_TRANSITIONS=2661} [2023-09-01 14:51:33,772 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 368 predicate places. [2023-09-01 14:51:33,772 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 2661 transitions, 71364 flow [2023-09-01 14:51:33,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:51:33,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:51:33,772 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:51:33,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 14:51:33,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:51:33,972 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:51:33,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:51:33,973 INFO L85 PathProgramCache]: Analyzing trace with hash 418152632, now seen corresponding path program 20 times [2023-09-01 14:51:33,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:51:33,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744975485] [2023-09-01 14:51:33,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:51:33,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:51:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:51:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-09-01 14:51:34,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:51:34,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744975485] [2023-09-01 14:51:34,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744975485] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:51:34,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555295504] [2023-09-01 14:51:34,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:51:34,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:51:34,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:51:34,451 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:51:34,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 14:51:34,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:51:34,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:51:34,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 44 conjunts are in the unsatisfiable core [2023-09-01 14:51:34,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:51:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-09-01 14:51:34,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:51:34,896 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:51:34,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-09-01 14:51:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-09-01 14:51:35,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555295504] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:51:35,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:51:35,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 36 [2023-09-01 14:51:35,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982881031] [2023-09-01 14:51:35,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:51:35,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 14:51:35,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:51:35,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 14:51:35,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1295, Unknown=0, NotChecked=0, Total=1406 [2023-09-01 14:51:35,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 211 [2023-09-01 14:51:35,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 2661 transitions, 71364 flow. Second operand has 38 states, 38 states have (on average 87.55263157894737) internal successors, (3327), 38 states have internal predecessors, (3327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:51:35,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:51:35,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 211 [2023-09-01 14:51:35,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:52:40,903 INFO L130 PetriNetUnfolder]: 55883/102449 cut-off events. [2023-09-01 14:52:40,903 INFO L131 PetriNetUnfolder]: For 2514301/2514301 co-relation queries the response was YES. [2023-09-01 14:52:42,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 912797 conditions, 102449 events. 55883/102449 cut-off events. For 2514301/2514301 co-relation queries the response was YES. Maximal size of possible extension queue 4867. Compared 1089282 event pairs, 3433 based on Foata normal form. 126/102575 useless extension candidates. Maximal degree in co-relation 912696. Up to 63321 conditions per place. [2023-09-01 14:52:42,848 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 1229 selfloop transitions, 4048 changer transitions 534/5811 dead transitions. [2023-09-01 14:52:42,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 5811 transitions, 137163 flow [2023-09-01 14:52:42,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2023-09-01 14:52:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2023-09-01 14:52:42,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 23651 transitions. [2023-09-01 14:52:42,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4483601895734597 [2023-09-01 14:52:42,861 INFO L72 ComplementDD]: Start complementDD. Operand 250 states and 23651 transitions. [2023-09-01 14:52:42,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 250 states and 23651 transitions. [2023-09-01 14:52:42,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:52:42,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 250 states and 23651 transitions. [2023-09-01 14:52:42,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 251 states, 250 states have (on average 94.604) internal successors, (23651), 250 states have internal predecessors, (23651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:52:43,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 251 states, 251 states have (on average 211.0) internal successors, (52961), 251 states have internal predecessors, (52961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:52:43,088 INFO L81 ComplementDD]: Finished complementDD. Result has 251 states, 251 states have (on average 211.0) internal successors, (52961), 251 states have internal predecessors, (52961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:52:43,088 INFO L175 Difference]: Start difference. First operand has 387 places, 2661 transitions, 71364 flow. Second operand 250 states and 23651 transitions. [2023-09-01 14:52:43,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 5811 transitions, 137163 flow [2023-09-01 14:53:27,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 636 places, 5811 transitions, 128413 flow, removed 4375 selfloop flow, removed 0 redundant places. [2023-09-01 14:53:27,167 INFO L231 Difference]: Finished difference. Result has 704 places, 4155 transitions, 110673 flow [2023-09-01 14:53:27,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=68540, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2580, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=250, PETRI_FLOW=110673, PETRI_PLACES=704, PETRI_TRANSITIONS=4155} [2023-09-01 14:53:27,168 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 685 predicate places. [2023-09-01 14:53:27,168 INFO L495 AbstractCegarLoop]: Abstraction has has 704 places, 4155 transitions, 110673 flow [2023-09-01 14:53:27,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 87.55263157894737) internal successors, (3327), 38 states have internal predecessors, (3327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:27,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:27,169 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:27,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 14:53:27,376 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,SelfDestructingSolverStorable22 [2023-09-01 14:53:27,377 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:53:27,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:27,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1389640500, now seen corresponding path program 21 times [2023-09-01 14:53:27,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:27,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682931509] [2023-09-01 14:53:27,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:27,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-09-01 14:53:27,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:27,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682931509] [2023-09-01 14:53:27,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682931509] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:53:27,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842858612] [2023-09-01 14:53:27,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:53:27,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:53:27,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:53:27,785 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:53:27,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 14:53:28,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 14:53:28,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:53:28,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 99 conjunts are in the unsatisfiable core [2023-09-01 14:53:28,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:53:28,253 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 [2023-09-01 14:53:28,293 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 [2023-09-01 14:53:28,330 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 [2023-09-01 14:53:28,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:53:28,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:53:28,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:53:28,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:53:28,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:53:28,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:53:28,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:53:28,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:53:28,794 INFO L321 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2023-09-01 14:53:28,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 58 treesize of output 25 [2023-09-01 14:53:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:53:28,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:53:30,559 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:53:30,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 161 [2023-09-01 14:53:30,608 INFO L321 Elim1Store]: treesize reduction 106, result has 25.9 percent of original size [2023-09-01 14:53:30,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 592 treesize of output 549 [2023-09-01 14:53:30,635 INFO L321 Elim1Store]: treesize reduction 142, result has 0.7 percent of original size [2023-09-01 14:53:30,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 513 treesize of output 383 [2023-09-01 14:53:30,661 INFO L321 Elim1Store]: treesize reduction 142, result has 0.7 percent of original size [2023-09-01 14:53:30,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 362 treesize of output 297 [2023-09-01 14:53:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:53:31,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842858612] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:53:31,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:53:31,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 17] total 47 [2023-09-01 14:53:31,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281157366] [2023-09-01 14:53:31,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:53:31,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-09-01 14:53:31,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:53:31,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-09-01 14:53:31,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=2057, Unknown=2, NotChecked=0, Total=2352 [2023-09-01 14:53:33,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:53:37,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:53:40,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:53:42,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:53:43,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 211 [2023-09-01 14:53:43,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 704 places, 4155 transitions, 110673 flow. Second operand has 49 states, 49 states have (on average 62.40816326530612) internal successors, (3058), 49 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:43,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:53:43,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 211 [2023-09-01 14:53:43,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:53:51,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:53:53,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:53:57,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:54:00,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:54:02,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:54:05,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:54:07,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:54:11,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:54:18,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:54:19,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:54:22,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:54:25,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:54:30,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:54:31,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:54:33,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:54:35,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:54:37,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:54:41,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:54:44,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:54:53,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:54:55,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:54:57,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:54:59,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:55:01,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:55:08,488 WARN L222 SmtUtils]: Spent 6.00s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:55:09,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:55:11,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:55:13,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:55:15,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:55:18,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:55:25,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:55:29,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:55:31,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:55:44,485 WARN L222 SmtUtils]: Spent 10.07s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:55:46,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:55:50,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:55:52,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:55:54,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:55:57,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:55:58,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 14:56:01,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:56:03,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:56:05,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:56:08,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:56:10,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:56:12,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:56:15,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:56:25,961 WARN L222 SmtUtils]: Spent 10.08s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:56:28,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:56:32,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:56:33,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:56:44,857 WARN L222 SmtUtils]: Spent 10.12s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:56:48,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:56:52,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:56:55,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:07,566 WARN L222 SmtUtils]: Spent 9.14s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:57:09,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:17,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:38,451 WARN L222 SmtUtils]: Spent 13.92s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:58:25,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:59:11,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Killed by 15