./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-multidimensional/max-3-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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 ../sv-benchmarks/c/array-multidimensional/max-3-n-u.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 6c8d330fcf7e017e6b51632eb7a9f8f167fb4f3e932700b6ef82da7b1572a2f0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:05:16,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:05:16,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:05:16,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:05:16,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:05:16,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:05:16,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:05:16,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:05:16,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:05:16,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:05:16,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:05:16,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:05:16,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:05:16,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:05:16,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:05:16,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:05:16,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:05:16,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:05:16,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:05:16,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:05:16,446 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:05:16,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:05:16,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:05:16,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:05:16,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:05:16,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:05:16,453 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:05:16,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:05:16,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:05:16,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:05:16,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:05:16,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:05:16,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:05:16,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:05:16,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:05:16,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:05:16,458 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:05:16,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:05:16,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:05:16,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:05:16,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:05:16,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:05:16,462 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:05:16,479 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:05:16,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:05:16,480 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:05:16,480 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:05:16,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:05:16,481 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:05:16,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:05:16,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:05:16,482 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:05:16,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:05:16,482 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:05:16,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:05:16,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:05:16,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:05:16,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:05:16,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:05:16,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:05:16,483 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:05:16,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:05:16,484 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:05:16,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:05:16,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:05:16,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:05:16,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:05:16,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:05:16,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:05:16,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:05:16,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:05:16,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:05:16,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:05:16,486 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:05:16,486 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:05:16,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:05:16,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c8d330fcf7e017e6b51632eb7a9f8f167fb4f3e932700b6ef82da7b1572a2f0 [2022-07-19 10:05:16,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:05:16,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:05:16,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:05:16,758 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:05:16,758 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:05:16,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/max-3-n-u.c [2022-07-19 10:05:16,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723cd7abd/8f75e7cecbb941d38fb18b473f1d7cb7/FLAG4ddc4fc08 [2022-07-19 10:05:17,213 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:05:17,214 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/max-3-n-u.c [2022-07-19 10:05:17,222 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723cd7abd/8f75e7cecbb941d38fb18b473f1d7cb7/FLAG4ddc4fc08 [2022-07-19 10:05:17,613 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723cd7abd/8f75e7cecbb941d38fb18b473f1d7cb7 [2022-07-19 10:05:17,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:05:17,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:05:17,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:05:17,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:05:17,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:05:17,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:05:17" (1/1) ... [2022-07-19 10:05:17,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d37f0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:05:17, skipping insertion in model container [2022-07-19 10:05:17,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:05:17" (1/1) ... [2022-07-19 10:05:17,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:05:17,646 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:05:17,787 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/max-3-n-u.c[321,334] [2022-07-19 10:05:17,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:05:17,811 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:05:17,819 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/max-3-n-u.c[321,334] [2022-07-19 10:05:17,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:05:17,838 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:05:17,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:05:17 WrapperNode [2022-07-19 10:05:17,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:05:17,839 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:05:17,839 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:05:17,840 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:05:17,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:05:17" (1/1) ... [2022-07-19 10:05:17,849 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:05:17" (1/1) ... [2022-07-19 10:05:17,863 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 109 [2022-07-19 10:05:17,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:05:17,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:05:17,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:05:17,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:05:17,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:05:17" (1/1) ... [2022-07-19 10:05:17,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:05:17" (1/1) ... [2022-07-19 10:05:17,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:05:17" (1/1) ... [2022-07-19 10:05:17,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:05:17" (1/1) ... [2022-07-19 10:05:17,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:05:17" (1/1) ... [2022-07-19 10:05:17,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:05:17" (1/1) ... [2022-07-19 10:05:17,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:05:17" (1/1) ... [2022-07-19 10:05:17,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:05:17,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:05:17,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:05:17,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:05:17,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:05:17" (1/1) ... [2022-07-19 10:05:17,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:05:17,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:05:17,917 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) [2022-07-19 10:05:17,922 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 [2022-07-19 10:05:17,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:05:17,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:05:17,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 10:05:17,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 10:05:17,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:05:17,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:05:17,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 10:05:17,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 10:05:17,992 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:05:17,993 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:05:18,130 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:05:18,135 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:05:18,135 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-07-19 10:05:18,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:05:18 BoogieIcfgContainer [2022-07-19 10:05:18,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:05:18,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:05:18,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:05:18,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:05:18,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:05:17" (1/3) ... [2022-07-19 10:05:18,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa7c7bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:05:18, skipping insertion in model container [2022-07-19 10:05:18,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:05:17" (2/3) ... [2022-07-19 10:05:18,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa7c7bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:05:18, skipping insertion in model container [2022-07-19 10:05:18,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:05:18" (3/3) ... [2022-07-19 10:05:18,164 INFO L111 eAbstractionObserver]: Analyzing ICFG max-3-n-u.c [2022-07-19 10:05:18,176 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:05:18,176 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:05:18,223 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:05:18,228 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@56eb7bb5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7c71039c [2022-07-19 10:05:18,229 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:05:18,232 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:18,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 10:05:18,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:05:18,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:05:18,238 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:05:18,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:05:18,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1361272673, now seen corresponding path program 1 times [2022-07-19 10:05:18,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:05:18,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170012509] [2022-07-19 10:05:18,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:05:18,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:05:18,314 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:05:18,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319267780] [2022-07-19 10:05:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:05:18,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:05:18,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:05:18,317 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) [2022-07-19 10:05:18,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 10:05:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:05:18,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-19 10:05:18,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:05:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:05:18,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:05:18,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:05:18,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170012509] [2022-07-19 10:05:18,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:05:18,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319267780] [2022-07-19 10:05:18,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319267780] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:05:18,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:05:18,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 10:05:18,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377212929] [2022-07-19 10:05:18,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:05:18,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 10:05:18,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:05:18,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 10:05:18,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:05:18,427 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:18,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:05:18,446 INFO L93 Difference]: Finished difference Result 56 states and 94 transitions. [2022-07-19 10:05:18,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 10:05:18,449 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 10:05:18,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:05:18,455 INFO L225 Difference]: With dead ends: 56 [2022-07-19 10:05:18,455 INFO L226 Difference]: Without dead ends: 25 [2022-07-19 10:05:18,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:05:18,473 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:05:18,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:05:18,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-19 10:05:18,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-19 10:05:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:18,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2022-07-19 10:05:18,502 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2022-07-19 10:05:18,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:05:18,503 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-07-19 10:05:18,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:18,503 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-07-19 10:05:18,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 10:05:18,504 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:05:18,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:05:18,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 10:05:18,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-19 10:05:18,705 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:05:18,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:05:18,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1322753665, now seen corresponding path program 1 times [2022-07-19 10:05:18,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:05:18,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890326852] [2022-07-19 10:05:18,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:05:18,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:05:18,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:05:18,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211846623] [2022-07-19 10:05:18,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:05:18,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:05:18,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:05:18,725 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) [2022-07-19 10:05:18,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 10:05:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:05:18,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 10:05:18,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:05:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:05:18,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:05:18,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:05:18,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890326852] [2022-07-19 10:05:18,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:05:18,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211846623] [2022-07-19 10:05:18,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211846623] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:05:18,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:05:18,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:05:18,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583909563] [2022-07-19 10:05:18,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:05:18,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:05:18,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:05:18,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:05:18,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:05:18,862 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:18,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:05:18,901 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2022-07-19 10:05:18,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:05:18,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 10:05:18,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:05:18,903 INFO L225 Difference]: With dead ends: 48 [2022-07-19 10:05:18,903 INFO L226 Difference]: Without dead ends: 30 [2022-07-19 10:05:18,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:05:18,905 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:05:18,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:05:18,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-19 10:05:18,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2022-07-19 10:05:18,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:18,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-07-19 10:05:18,913 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 11 [2022-07-19 10:05:18,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:05:18,913 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-07-19 10:05:18,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:18,914 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-07-19 10:05:18,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 10:05:18,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:05:18,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:05:18,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 10:05:19,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-07-19 10:05:19,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:05:19,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:05:19,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1329032119, now seen corresponding path program 1 times [2022-07-19 10:05:19,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:05:19,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506157268] [2022-07-19 10:05:19,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:05:19,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:05:19,133 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:05:19,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076342846] [2022-07-19 10:05:19,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:05:19,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:05:19,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:05:19,139 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) [2022-07-19 10:05:19,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 10:05:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:05:19,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 10:05:19,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:05:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:05:19,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:05:19,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:05:19,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506157268] [2022-07-19 10:05:19,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:05:19,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076342846] [2022-07-19 10:05:19,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076342846] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:05:19,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:05:19,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:05:19,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115498307] [2022-07-19 10:05:19,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:05:19,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:05:19,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:05:19,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:05:19,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:05:19,211 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:05:19,291 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2022-07-19 10:05:19,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:05:19,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-19 10:05:19,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:05:19,293 INFO L225 Difference]: With dead ends: 67 [2022-07-19 10:05:19,293 INFO L226 Difference]: Without dead ends: 44 [2022-07-19 10:05:19,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:05:19,295 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 70 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:05:19,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 36 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:05:19,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-19 10:05:19,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2022-07-19 10:05:19,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:19,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2022-07-19 10:05:19,311 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2022-07-19 10:05:19,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:05:19,311 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2022-07-19 10:05:19,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:19,312 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2022-07-19 10:05:19,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-19 10:05:19,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:05:19,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:05:19,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 10:05:19,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:05:19,532 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:05:19,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:05:19,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1416884703, now seen corresponding path program 1 times [2022-07-19 10:05:19,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:05:19,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618445501] [2022-07-19 10:05:19,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:05:19,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:05:19,541 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:05:19,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938489966] [2022-07-19 10:05:19,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:05:19,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:05:19,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:05:19,544 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) [2022-07-19 10:05:19,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 10:05:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:05:19,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 10:05:19,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:05:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:05:19,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:05:19,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:05:19,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618445501] [2022-07-19 10:05:19,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:05:19,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938489966] [2022-07-19 10:05:19,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938489966] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:05:19,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:05:19,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:05:19,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869205828] [2022-07-19 10:05:19,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:05:19,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:05:19,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:05:19,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:05:19,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:05:19,617 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:19,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:05:19,657 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2022-07-19 10:05:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:05:19,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-19 10:05:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:05:19,658 INFO L225 Difference]: With dead ends: 67 [2022-07-19 10:05:19,659 INFO L226 Difference]: Without dead ends: 41 [2022-07-19 10:05:19,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:05:19,660 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:05:19,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:05:19,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-19 10:05:19,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2022-07-19 10:05:19,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:19,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-19 10:05:19,666 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2022-07-19 10:05:19,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:05:19,667 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-19 10:05:19,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:19,667 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-19 10:05:19,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 10:05:19,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:05:19,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:05:19,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 10:05:19,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:05:19,894 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:05:19,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:05:19,894 INFO L85 PathProgramCache]: Analyzing trace with hash 109301050, now seen corresponding path program 1 times [2022-07-19 10:05:19,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:05:19,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954730949] [2022-07-19 10:05:19,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:05:19,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:05:19,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:05:19,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747476229] [2022-07-19 10:05:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:05:19,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:05:19,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:05:19,908 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) [2022-07-19 10:05:19,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 10:05:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:05:19,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:05:19,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:05:19,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:05:19,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:05:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:05:20,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:05:20,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954730949] [2022-07-19 10:05:20,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:05:20,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747476229] [2022-07-19 10:05:20,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747476229] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:05:20,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:05:20,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-19 10:05:20,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060559263] [2022-07-19 10:05:20,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:05:20,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:05:20,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:05:20,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:05:20,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:05:20,044 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:20,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:05:20,152 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2022-07-19 10:05:20,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:05:20,152 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-19 10:05:20,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:05:20,156 INFO L225 Difference]: With dead ends: 91 [2022-07-19 10:05:20,156 INFO L226 Difference]: Without dead ends: 62 [2022-07-19 10:05:20,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:05:20,158 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 110 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:05:20,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 51 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:05:20,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-19 10:05:20,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2022-07-19 10:05:20,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:20,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-07-19 10:05:20,179 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 18 [2022-07-19 10:05:20,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:05:20,179 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-07-19 10:05:20,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:20,180 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-07-19 10:05:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 10:05:20,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:05:20,180 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:05:20,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 10:05:20,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:05:20,384 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:05:20,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:05:20,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1195208863, now seen corresponding path program 2 times [2022-07-19 10:05:20,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:05:20,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806860570] [2022-07-19 10:05:20,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:05:20,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:05:20,399 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:05:20,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183729003] [2022-07-19 10:05:20,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:05:20,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:05:20,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:05:20,401 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) [2022-07-19 10:05:20,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 10:05:20,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 10:05:20,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:05:20,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 10:05:20,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:05:20,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:05:20,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:05:20,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:05:20,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806860570] [2022-07-19 10:05:20,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:05:20,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183729003] [2022-07-19 10:05:20,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183729003] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:05:20,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:05:20,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:05:20,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795550970] [2022-07-19 10:05:20,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:05:20,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:05:20,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:05:20,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:05:20,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:05:20,495 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:20,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:05:20,539 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2022-07-19 10:05:20,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:05:20,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-19 10:05:20,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:05:20,543 INFO L225 Difference]: With dead ends: 121 [2022-07-19 10:05:20,543 INFO L226 Difference]: Without dead ends: 100 [2022-07-19 10:05:20,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:05:20,546 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:05:20,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 41 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:05:20,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-19 10:05:20,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 54. [2022-07-19 10:05:20,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:20,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-07-19 10:05:20,568 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 21 [2022-07-19 10:05:20,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:05:20,568 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-07-19 10:05:20,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:20,569 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-07-19 10:05:20,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 10:05:20,578 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:05:20,579 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:05:20,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 10:05:20,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:05:20,796 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:05:20,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:05:20,796 INFO L85 PathProgramCache]: Analyzing trace with hash 238928719, now seen corresponding path program 1 times [2022-07-19 10:05:20,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:05:20,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484155296] [2022-07-19 10:05:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:05:20,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:05:20,808 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:05:20,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474634532] [2022-07-19 10:05:20,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:05:20,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:05:20,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:05:20,811 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) [2022-07-19 10:05:20,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 10:05:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:05:20,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 10:05:20,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:05:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 10:05:20,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:05:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 10:05:21,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:05:21,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484155296] [2022-07-19 10:05:21,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:05:21,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474634532] [2022-07-19 10:05:21,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474634532] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:05:21,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:05:21,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-19 10:05:21,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687913109] [2022-07-19 10:05:21,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:05:21,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 10:05:21,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:05:21,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 10:05:21,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:05:21,050 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:21,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:05:21,292 INFO L93 Difference]: Finished difference Result 166 states and 217 transitions. [2022-07-19 10:05:21,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 10:05:21,292 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-19 10:05:21,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:05:21,293 INFO L225 Difference]: With dead ends: 166 [2022-07-19 10:05:21,293 INFO L226 Difference]: Without dead ends: 115 [2022-07-19 10:05:21,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-07-19 10:05:21,295 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 305 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:05:21,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 86 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:05:21,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-19 10:05:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2022-07-19 10:05:21,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2947368421052632) internal successors, (123), 95 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2022-07-19 10:05:21,326 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 39 [2022-07-19 10:05:21,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:05:21,326 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2022-07-19 10:05:21,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:21,326 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2022-07-19 10:05:21,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-19 10:05:21,332 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:05:21,332 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:05:21,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 10:05:21,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:05:21,551 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:05:21,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:05:21,551 INFO L85 PathProgramCache]: Analyzing trace with hash 66224111, now seen corresponding path program 2 times [2022-07-19 10:05:21,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:05:21,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078247634] [2022-07-19 10:05:21,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:05:21,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:05:21,572 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:05:21,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197189198] [2022-07-19 10:05:21,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:05:21,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:05:21,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:05:21,586 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) [2022-07-19 10:05:21,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 10:05:21,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:05:21,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:05:21,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 10:05:21,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:05:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-19 10:05:21,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:05:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-19 10:05:22,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:05:22,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078247634] [2022-07-19 10:05:22,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:05:22,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197189198] [2022-07-19 10:05:22,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197189198] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:05:22,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:05:22,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-19 10:05:22,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033777885] [2022-07-19 10:05:22,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:05:22,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 10:05:22,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:05:22,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 10:05:22,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-07-19 10:05:22,022 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:22,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:05:22,560 INFO L93 Difference]: Finished difference Result 316 states and 409 transitions. [2022-07-19 10:05:22,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 10:05:22,560 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-19 10:05:22,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:05:22,561 INFO L225 Difference]: With dead ends: 316 [2022-07-19 10:05:22,561 INFO L226 Difference]: Without dead ends: 223 [2022-07-19 10:05:22,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 10:05:22,563 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 711 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:05:22,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 158 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:05:22,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-19 10:05:22,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 180. [2022-07-19 10:05:22,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.2905027932960893) internal successors, (231), 179 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:22,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 231 transitions. [2022-07-19 10:05:22,582 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 231 transitions. Word has length 63 [2022-07-19 10:05:22,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:05:22,583 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 231 transitions. [2022-07-19 10:05:22,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:22,583 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 231 transitions. [2022-07-19 10:05:22,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-19 10:05:22,584 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:05:22,584 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:05:22,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 10:05:22,797 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,SelfDestructingSolverStorable7 [2022-07-19 10:05:22,798 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:05:22,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:05:22,799 INFO L85 PathProgramCache]: Analyzing trace with hash 811802927, now seen corresponding path program 3 times [2022-07-19 10:05:22,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:05:22,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044372147] [2022-07-19 10:05:22,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:05:22,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:05:22,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:05:22,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756532331] [2022-07-19 10:05:22,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:05:22,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:05:22,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:05:22,823 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) [2022-07-19 10:05:22,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 10:05:22,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 10:05:22,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:05:22,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:05:22,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:05:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2022-07-19 10:05:23,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:05:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2022-07-19 10:05:23,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:05:23,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044372147] [2022-07-19 10:05:23,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:05:23,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756532331] [2022-07-19 10:05:23,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756532331] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:05:23,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:05:23,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-19 10:05:23,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99254350] [2022-07-19 10:05:23,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:05:23,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:05:23,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:05:23,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:05:23,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:05:23,330 INFO L87 Difference]: Start difference. First operand 180 states and 231 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:23,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:05:23,461 INFO L93 Difference]: Finished difference Result 852 states and 1104 transitions. [2022-07-19 10:05:23,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:05:23,462 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-07-19 10:05:23,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:05:23,466 INFO L225 Difference]: With dead ends: 852 [2022-07-19 10:05:23,466 INFO L226 Difference]: Without dead ends: 703 [2022-07-19 10:05:23,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:05:23,470 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 267 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:05:23,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 78 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:05:23,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-07-19 10:05:23,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 480. [2022-07-19 10:05:23,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 1.2713987473903967) internal successors, (609), 479 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:23,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 609 transitions. [2022-07-19 10:05:23,527 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 609 transitions. Word has length 111 [2022-07-19 10:05:23,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:05:23,527 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 609 transitions. [2022-07-19 10:05:23,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:05:23,527 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 609 transitions. [2022-07-19 10:05:23,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-07-19 10:05:23,537 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:05:23,537 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 88, 88, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:05:23,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 10:05:23,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:05:23,758 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:05:23,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:05:23,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1613933369, now seen corresponding path program 4 times [2022-07-19 10:05:23,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:05:23,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546133293] [2022-07-19 10:05:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:05:23,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:05:23,822 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:05:23,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269255706] [2022-07-19 10:05:23,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:05:23,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:05:23,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:05:23,824 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) [2022-07-19 10:05:23,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 10:05:24,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:05:24,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:05:24,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 275 conjunts are in the unsatisfiable core [2022-07-19 10:05:24,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:07:23,550 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-07-19 10:07:23,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:07:23,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546133293] [2022-07-19 10:07:23,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:07:23,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269255706] [2022-07-19 10:07:23,551 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-19 10:07:23,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2022-07-19 10:07:23,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 10:07:23,752 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,SelfDestructingSolverStorable9 [2022-07-19 10:07:23,752 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:929) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:768) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 44 more [2022-07-19 10:07:23,756 INFO L158 Benchmark]: Toolchain (without parser) took 126138.81ms. Allocated memory was 127.9MB in the beginning and 195.0MB in the end (delta: 67.1MB). Free memory was 90.1MB in the beginning and 85.0MB in the end (delta: 5.1MB). Peak memory consumption was 71.4MB. Max. memory is 16.1GB. [2022-07-19 10:07:23,756 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 127.9MB. Free memory is still 106.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 10:07:23,756 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.95ms. Allocated memory is still 127.9MB. Free memory was 90.0MB in the beginning and 101.9MB in the end (delta: -12.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-19 10:07:23,756 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.59ms. Allocated memory is still 127.9MB. Free memory was 101.9MB in the beginning and 100.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 10:07:23,757 INFO L158 Benchmark]: Boogie Preprocessor took 19.01ms. Allocated memory is still 127.9MB. Free memory was 100.3MB in the beginning and 99.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 10:07:23,757 INFO L158 Benchmark]: RCFGBuilder took 253.10ms. Allocated memory is still 127.9MB. Free memory was 98.7MB in the beginning and 87.7MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-19 10:07:23,757 INFO L158 Benchmark]: TraceAbstraction took 125603.53ms. Allocated memory was 127.9MB in the beginning and 195.0MB in the end (delta: 67.1MB). Free memory was 87.0MB in the beginning and 85.0MB in the end (delta: 1.9MB). Peak memory consumption was 69.9MB. Max. memory is 16.1GB. [2022-07-19 10:07:23,759 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 127.9MB. Free memory is still 106.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 220.95ms. Allocated memory is still 127.9MB. Free memory was 90.0MB in the beginning and 101.9MB in the end (delta: -12.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.59ms. Allocated memory is still 127.9MB. Free memory was 101.9MB in the beginning and 100.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 19.01ms. Allocated memory is still 127.9MB. Free memory was 100.3MB in the beginning and 99.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 253.10ms. Allocated memory is still 127.9MB. Free memory was 98.7MB in the beginning and 87.7MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 125603.53ms. Allocated memory was 127.9MB in the beginning and 195.0MB in the end (delta: 67.1MB). Free memory was 87.0MB in the beginning and 85.0MB in the end (delta: 1.9MB). Peak memory consumption was 69.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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 ../sv-benchmarks/c/array-multidimensional/max-3-n-u.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 6c8d330fcf7e017e6b51632eb7a9f8f167fb4f3e932700b6ef82da7b1572a2f0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:07:25,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:07:25,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:07:25,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:07:25,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:07:25,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:07:25,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:07:25,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:07:25,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:07:25,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:07:25,516 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:07:25,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:07:25,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:07:25,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:07:25,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:07:25,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:07:25,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:07:25,530 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:07:25,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:07:25,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:07:25,537 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:07:25,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:07:25,539 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:07:25,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:07:25,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:07:25,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:07:25,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:07:25,546 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:07:25,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:07:25,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:07:25,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:07:25,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:07:25,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:07:25,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:07:25,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:07:25,552 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:07:25,552 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:07:25,553 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:07:25,553 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:07:25,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:07:25,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:07:25,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:07:25,556 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-19 10:07:25,581 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:07:25,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:07:25,582 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:07:25,582 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:07:25,583 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:07:25,583 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:07:25,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:07:25,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:07:25,584 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:07:25,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:07:25,590 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:07:25,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:07:25,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:07:25,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:07:25,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:07:25,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:07:25,591 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-19 10:07:25,591 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-19 10:07:25,591 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-19 10:07:25,592 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:07:25,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:07:25,592 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:07:25,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:07:25,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:07:25,593 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:07:25,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:07:25,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:07:25,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:07:25,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:07:25,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:07:25,594 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-19 10:07:25,594 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-19 10:07:25,594 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:07:25,595 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:07:25,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:07:25,595 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-19 10:07:25,595 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c8d330fcf7e017e6b51632eb7a9f8f167fb4f3e932700b6ef82da7b1572a2f0 [2022-07-19 10:07:25,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:07:25,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:07:25,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:07:25,891 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:07:25,892 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:07:25,893 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/max-3-n-u.c [2022-07-19 10:07:25,949 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ede0ff154/15e9c04454af4ec9b1cc0837fbcd22a2/FLAGf96b66464 [2022-07-19 10:07:26,402 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:07:26,402 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/max-3-n-u.c [2022-07-19 10:07:26,408 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ede0ff154/15e9c04454af4ec9b1cc0837fbcd22a2/FLAGf96b66464 [2022-07-19 10:07:26,797 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ede0ff154/15e9c04454af4ec9b1cc0837fbcd22a2 [2022-07-19 10:07:26,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:07:26,800 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:07:26,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:07:26,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:07:26,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:07:26,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:07:26" (1/1) ... [2022-07-19 10:07:26,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59b3cce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:26, skipping insertion in model container [2022-07-19 10:07:26,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:07:26" (1/1) ... [2022-07-19 10:07:26,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:07:26,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:07:26,934 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/max-3-n-u.c[321,334] [2022-07-19 10:07:26,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:07:26,958 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:07:26,971 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/max-3-n-u.c[321,334] [2022-07-19 10:07:26,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:07:27,003 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:07:27,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:27 WrapperNode [2022-07-19 10:07:27,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:07:27,008 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:07:27,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:07:27,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:07:27,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:27" (1/1) ... [2022-07-19 10:07:27,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:27" (1/1) ... [2022-07-19 10:07:27,048 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2022-07-19 10:07:27,048 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:07:27,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:07:27,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:07:27,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:07:27,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:27" (1/1) ... [2022-07-19 10:07:27,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:27" (1/1) ... [2022-07-19 10:07:27,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:27" (1/1) ... [2022-07-19 10:07:27,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:27" (1/1) ... [2022-07-19 10:07:27,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:27" (1/1) ... [2022-07-19 10:07:27,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:27" (1/1) ... [2022-07-19 10:07:27,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:27" (1/1) ... [2022-07-19 10:07:27,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:07:27,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:07:27,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:07:27,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:07:27,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:27" (1/1) ... [2022-07-19 10:07:27,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:07:27,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:07:27,108 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) [2022-07-19 10:07:27,122 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 [2022-07-19 10:07:27,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:07:27,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-19 10:07:27,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 10:07:27,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-19 10:07:27,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:07:27,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:07:27,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 10:07:27,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-19 10:07:27,211 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:07:27,214 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:07:27,685 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:07:27,696 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:07:27,697 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-07-19 10:07:27,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:07:27 BoogieIcfgContainer [2022-07-19 10:07:27,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:07:27,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:07:27,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:07:27,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:07:27,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:07:26" (1/3) ... [2022-07-19 10:07:27,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9ec1cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:07:27, skipping insertion in model container [2022-07-19 10:07:27,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:27" (2/3) ... [2022-07-19 10:07:27,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9ec1cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:07:27, skipping insertion in model container [2022-07-19 10:07:27,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:07:27" (3/3) ... [2022-07-19 10:07:27,708 INFO L111 eAbstractionObserver]: Analyzing ICFG max-3-n-u.c [2022-07-19 10:07:27,720 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:07:27,721 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:07:27,778 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:07:27,796 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4235c5f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@29bae2c0 [2022-07-19 10:07:27,797 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:07:27,802 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:27,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 10:07:27,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:07:27,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:07:27,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:07:27,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:07:27,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1361272673, now seen corresponding path program 1 times [2022-07-19 10:07:27,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:07:27,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406004723] [2022-07-19 10:07:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:07:27,826 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:07:27,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:07:27,831 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:07:27,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-19 10:07:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:07:27,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-19 10:07:27,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:07:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:07:27,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:07:27,969 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:07:27,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406004723] [2022-07-19 10:07:27,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406004723] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:07:27,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:07:27,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 10:07:27,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482822203] [2022-07-19 10:07:27,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:07:27,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 10:07:27,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:07:28,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 10:07:28,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:07:28,005 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:28,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:07:28,022 INFO L93 Difference]: Finished difference Result 56 states and 94 transitions. [2022-07-19 10:07:28,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 10:07:28,024 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 10:07:28,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:07:28,030 INFO L225 Difference]: With dead ends: 56 [2022-07-19 10:07:28,031 INFO L226 Difference]: Without dead ends: 25 [2022-07-19 10:07:28,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:07:28,037 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:07:28,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:07:28,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-19 10:07:28,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-19 10:07:28,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:28,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2022-07-19 10:07:28,070 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2022-07-19 10:07:28,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:07:28,071 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-07-19 10:07:28,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:28,071 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-07-19 10:07:28,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 10:07:28,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:07:28,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:07:28,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-19 10:07:28,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:07:28,282 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:07:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:07:28,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1322753665, now seen corresponding path program 1 times [2022-07-19 10:07:28,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:07:28,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666777772] [2022-07-19 10:07:28,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:07:28,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:07:28,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:07:28,287 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:07:28,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-19 10:07:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:07:28,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 10:07:28,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:07:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:07:28,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:07:28,404 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:07:28,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666777772] [2022-07-19 10:07:28,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666777772] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:07:28,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:07:28,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:07:28,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111575288] [2022-07-19 10:07:28,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:07:28,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:07:28,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:07:28,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:07:28,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:07:28,408 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:07:28,640 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2022-07-19 10:07:28,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:07:28,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 10:07:28,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:07:28,648 INFO L225 Difference]: With dead ends: 48 [2022-07-19 10:07:28,648 INFO L226 Difference]: Without dead ends: 30 [2022-07-19 10:07:28,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:07:28,649 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:07:28,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:07:28,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-19 10:07:28,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2022-07-19 10:07:28,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:28,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-07-19 10:07:28,655 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 11 [2022-07-19 10:07:28,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:07:28,655 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-07-19 10:07:28,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:28,656 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-07-19 10:07:28,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 10:07:28,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:07:28,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:07:28,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-07-19 10:07:28,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:07:28,857 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:07:28,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:07:28,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1329032119, now seen corresponding path program 1 times [2022-07-19 10:07:28,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:07:28,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853057962] [2022-07-19 10:07:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:07:28,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:07:28,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:07:28,860 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:07:28,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-19 10:07:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:07:28,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 10:07:28,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:07:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:07:28,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:07:28,950 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:07:28,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853057962] [2022-07-19 10:07:28,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853057962] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:07:28,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:07:28,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:07:28,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699606792] [2022-07-19 10:07:28,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:07:28,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:07:28,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:07:28,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:07:28,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:07:28,952 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:29,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:07:29,223 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2022-07-19 10:07:29,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:07:29,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-19 10:07:29,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:07:29,224 INFO L225 Difference]: With dead ends: 67 [2022-07-19 10:07:29,224 INFO L226 Difference]: Without dead ends: 44 [2022-07-19 10:07:29,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:07:29,226 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 70 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:07:29,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 36 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:07:29,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-19 10:07:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2022-07-19 10:07:29,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2022-07-19 10:07:29,235 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2022-07-19 10:07:29,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:07:29,236 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2022-07-19 10:07:29,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2022-07-19 10:07:29,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-19 10:07:29,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:07:29,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:07:29,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-19 10:07:29,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:07:29,447 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:07:29,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:07:29,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1416884703, now seen corresponding path program 1 times [2022-07-19 10:07:29,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:07:29,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463667864] [2022-07-19 10:07:29,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:07:29,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:07:29,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:07:29,455 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:07:29,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-19 10:07:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:07:29,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 10:07:29,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:07:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:07:29,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:07:29,541 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:07:29,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463667864] [2022-07-19 10:07:29,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463667864] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:07:29,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:07:29,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:07:29,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315497285] [2022-07-19 10:07:29,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:07:29,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:07:29,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:07:29,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:07:29,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:07:29,543 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:29,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:07:29,788 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2022-07-19 10:07:29,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:07:29,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-19 10:07:29,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:07:29,790 INFO L225 Difference]: With dead ends: 67 [2022-07-19 10:07:29,790 INFO L226 Difference]: Without dead ends: 41 [2022-07-19 10:07:29,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:07:29,791 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:07:29,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:07:29,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-19 10:07:29,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2022-07-19 10:07:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:29,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-19 10:07:29,797 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2022-07-19 10:07:29,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:07:29,797 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-19 10:07:29,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:29,798 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-19 10:07:29,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 10:07:29,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:07:29,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:07:29,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-19 10:07:30,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:07:30,008 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:07:30,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:07:30,008 INFO L85 PathProgramCache]: Analyzing trace with hash 109301050, now seen corresponding path program 1 times [2022-07-19 10:07:30,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:07:30,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646497103] [2022-07-19 10:07:30,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:07:30,009 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:07:30,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:07:30,011 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:07:30,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-19 10:07:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:07:30,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:07:30,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:07:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:07:30,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:07:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:07:30,160 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:07:30,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646497103] [2022-07-19 10:07:30,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646497103] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:07:30,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:07:30,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-19 10:07:30,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351678616] [2022-07-19 10:07:30,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:07:30,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:07:30,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:07:30,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:07:30,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:07:30,162 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:30,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:07:30,723 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2022-07-19 10:07:30,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:07:30,723 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-19 10:07:30,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:07:30,724 INFO L225 Difference]: With dead ends: 91 [2022-07-19 10:07:30,724 INFO L226 Difference]: Without dead ends: 62 [2022-07-19 10:07:30,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:07:30,725 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 110 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:07:30,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 68 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 10:07:30,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-19 10:07:30,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2022-07-19 10:07:30,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:30,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-07-19 10:07:30,735 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 18 [2022-07-19 10:07:30,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:07:30,735 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-07-19 10:07:30,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:30,735 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-07-19 10:07:30,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 10:07:30,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:07:30,736 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:07:30,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-19 10:07:30,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:07:30,946 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:07:30,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:07:30,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1195208863, now seen corresponding path program 2 times [2022-07-19 10:07:30,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:07:30,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348486897] [2022-07-19 10:07:30,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:07:30,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:07:30,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:07:30,949 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:07:30,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-19 10:07:31,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 10:07:31,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:07:31,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 10:07:31,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:07:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:07:31,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:07:31,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:07:31,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348486897] [2022-07-19 10:07:31,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348486897] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:07:31,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:07:31,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:07:31,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498744847] [2022-07-19 10:07:31,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:07:31,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:07:31,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:07:31,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:07:31,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:07:31,062 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:31,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:07:31,408 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2022-07-19 10:07:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:07:31,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-19 10:07:31,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:07:31,417 INFO L225 Difference]: With dead ends: 121 [2022-07-19 10:07:31,417 INFO L226 Difference]: Without dead ends: 100 [2022-07-19 10:07:31,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:07:31,419 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:07:31,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 41 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:07:31,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-19 10:07:31,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 54. [2022-07-19 10:07:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:31,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-07-19 10:07:31,430 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 21 [2022-07-19 10:07:31,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:07:31,431 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-07-19 10:07:31,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:31,431 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-07-19 10:07:31,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 10:07:31,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:07:31,432 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:07:31,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-19 10:07:31,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:07:31,642 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:07:31,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:07:31,642 INFO L85 PathProgramCache]: Analyzing trace with hash 238928719, now seen corresponding path program 1 times [2022-07-19 10:07:31,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:07:31,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590817672] [2022-07-19 10:07:31,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:07:31,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:07:31,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:07:31,644 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:07:31,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-19 10:07:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:07:31,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 10:07:31,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:07:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 10:07:31,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:07:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 10:07:32,025 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:07:32,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590817672] [2022-07-19 10:07:32,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590817672] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:07:32,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:07:32,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-19 10:07:32,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201119126] [2022-07-19 10:07:32,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:07:32,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 10:07:32,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:07:32,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 10:07:32,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:07:32,027 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:33,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:07:33,726 INFO L93 Difference]: Finished difference Result 166 states and 217 transitions. [2022-07-19 10:07:33,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 10:07:33,726 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-19 10:07:33,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:07:33,727 INFO L225 Difference]: With dead ends: 166 [2022-07-19 10:07:33,727 INFO L226 Difference]: Without dead ends: 115 [2022-07-19 10:07:33,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2022-07-19 10:07:33,729 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 363 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:07:33,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 198 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 10:07:33,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-19 10:07:33,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2022-07-19 10:07:33,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2947368421052632) internal successors, (123), 95 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:33,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2022-07-19 10:07:33,743 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 39 [2022-07-19 10:07:33,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:07:33,743 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2022-07-19 10:07:33,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:33,743 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2022-07-19 10:07:33,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-19 10:07:33,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:07:33,745 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:07:33,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-19 10:07:33,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:07:33,956 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:07:33,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:07:33,956 INFO L85 PathProgramCache]: Analyzing trace with hash 66224111, now seen corresponding path program 2 times [2022-07-19 10:07:33,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:07:33,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263289695] [2022-07-19 10:07:33,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:07:33,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:07:33,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:07:33,958 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:07:33,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-19 10:07:34,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:07:34,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:07:34,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 10:07:34,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:07:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-19 10:07:34,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:07:34,783 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-19 10:07:34,784 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:07:34,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263289695] [2022-07-19 10:07:34,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263289695] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:07:34,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:07:34,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-19 10:07:34,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787447856] [2022-07-19 10:07:34,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:07:34,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 10:07:34,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:07:34,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 10:07:34,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-07-19 10:07:34,791 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:07:39,489 INFO L93 Difference]: Finished difference Result 316 states and 409 transitions. [2022-07-19 10:07:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 10:07:39,490 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-19 10:07:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:07:39,491 INFO L225 Difference]: With dead ends: 316 [2022-07-19 10:07:39,491 INFO L226 Difference]: Without dead ends: 223 [2022-07-19 10:07:39,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=479, Invalid=853, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 10:07:39,493 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 1416 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1416 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:07:39,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1416 Valid, 678 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-07-19 10:07:39,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-19 10:07:39,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 180. [2022-07-19 10:07:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.2905027932960893) internal successors, (231), 179 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 231 transitions. [2022-07-19 10:07:39,513 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 231 transitions. Word has length 63 [2022-07-19 10:07:39,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:07:39,514 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 231 transitions. [2022-07-19 10:07:39,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:39,514 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 231 transitions. [2022-07-19 10:07:39,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-19 10:07:39,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:07:39,517 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:07:39,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-19 10:07:39,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:07:39,731 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:07:39,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:07:39,731 INFO L85 PathProgramCache]: Analyzing trace with hash 811802927, now seen corresponding path program 3 times [2022-07-19 10:07:39,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:07:39,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046235338] [2022-07-19 10:07:39,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:07:39,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:07:39,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:07:39,733 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:07:39,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-19 10:07:39,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 10:07:39,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:07:39,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:07:39,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:07:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2022-07-19 10:07:40,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:07:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2022-07-19 10:07:40,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:07:40,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046235338] [2022-07-19 10:07:40,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046235338] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:07:40,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:07:40,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-19 10:07:40,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520670044] [2022-07-19 10:07:40,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:07:40,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:07:40,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:07:40,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:07:40,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:07:40,385 INFO L87 Difference]: Start difference. First operand 180 states and 231 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:40,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:07:40,979 INFO L93 Difference]: Finished difference Result 852 states and 1104 transitions. [2022-07-19 10:07:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:07:40,980 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-07-19 10:07:40,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:07:40,983 INFO L225 Difference]: With dead ends: 852 [2022-07-19 10:07:40,983 INFO L226 Difference]: Without dead ends: 703 [2022-07-19 10:07:40,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:07:40,984 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 267 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:07:40,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 97 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 10:07:40,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-07-19 10:07:41,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 480. [2022-07-19 10:07:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 1.2713987473903967) internal successors, (609), 479 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:41,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 609 transitions. [2022-07-19 10:07:41,041 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 609 transitions. Word has length 111 [2022-07-19 10:07:41,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:07:41,042 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 609 transitions. [2022-07-19 10:07:41,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:41,042 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 609 transitions. [2022-07-19 10:07:41,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-07-19 10:07:41,054 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:07:41,054 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 88, 88, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:07:41,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-19 10:07:41,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:07:41,276 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:07:41,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:07:41,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1613933369, now seen corresponding path program 4 times [2022-07-19 10:07:41,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:07:41,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196720995] [2022-07-19 10:07:41,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:07:41,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:07:41,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:07:41,279 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:07:41,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-19 10:07:41,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:07:41,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:07:41,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-19 10:07:41,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:07:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16128 backedges. 1598 proven. 253 refuted. 0 times theorem prover too weak. 14277 trivial. 0 not checked. [2022-07-19 10:07:42,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:07:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16128 backedges. 1598 proven. 253 refuted. 0 times theorem prover too weak. 14277 trivial. 0 not checked. [2022-07-19 10:07:43,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 10:07:43,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196720995] [2022-07-19 10:07:43,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196720995] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:07:43,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:07:43,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-07-19 10:07:43,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413293283] [2022-07-19 10:07:43,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:07:43,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-19 10:07:43,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 10:07:43,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-19 10:07:43,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2022-07-19 10:07:43,957 INFO L87 Difference]: Start difference. First operand 480 states and 609 transitions. Second operand has 50 states, 50 states have (on average 1.56) internal successors, (78), 50 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:58,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:07:58,970 INFO L93 Difference]: Finished difference Result 1503 states and 2052 transitions. [2022-07-19 10:07:58,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-19 10:07:58,970 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 50 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 411 [2022-07-19 10:07:58,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:07:58,974 INFO L225 Difference]: With dead ends: 1503 [2022-07-19 10:07:58,974 INFO L226 Difference]: Without dead ends: 1027 [2022-07-19 10:07:58,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 772 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1823, Invalid=3433, Unknown=0, NotChecked=0, Total=5256 [2022-07-19 10:07:58,977 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 4502 mSDsluCounter, 2402 mSDsCounter, 0 mSdLazyCounter, 3585 mSolverCounterSat, 1683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4502 SdHoareTripleChecker+Valid, 2515 SdHoareTripleChecker+Invalid, 5268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1683 IncrementalHoareTripleChecker+Valid, 3585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:07:58,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4502 Valid, 2515 Invalid, 5268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1683 Valid, 3585 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2022-07-19 10:07:58,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-07-19 10:07:59,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 936. [2022-07-19 10:07:59,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 1.267379679144385) internal successors, (1185), 935 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:59,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1185 transitions. [2022-07-19 10:07:59,042 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1185 transitions. Word has length 411 [2022-07-19 10:07:59,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:07:59,043 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1185 transitions. [2022-07-19 10:07:59,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 50 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:07:59,043 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1185 transitions. [2022-07-19 10:07:59,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2022-07-19 10:07:59,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:07:59,059 INFO L195 NwaCegarLoop]: trace histogram [184, 184, 184, 184, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:07:59,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-19 10:07:59,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 10:07:59,276 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:07:59,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:07:59,276 INFO L85 PathProgramCache]: Analyzing trace with hash 788549945, now seen corresponding path program 5 times [2022-07-19 10:07:59,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 10:07:59,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197462580] [2022-07-19 10:07:59,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:07:59,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 10:07:59,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 10:07:59,279 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 10:07:59,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process