./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c36dfa3b 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/uthash-2.0.2/uthash_JEN_test7-2.i -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 1f8d40fc3d39b827c494ff373d43bd116589a8fd89c6e972621bd6e0216b2f6d --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-c36dfa3 [2021-11-04 15:33:29,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-04 15:33:29,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-04 15:33:29,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-04 15:33:29,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-04 15:33:29,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-04 15:33:29,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-04 15:33:29,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-04 15:33:29,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-04 15:33:29,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-04 15:33:29,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-04 15:33:29,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-04 15:33:29,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-04 15:33:29,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-04 15:33:29,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-04 15:33:29,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-04 15:33:29,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-04 15:33:29,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-04 15:33:29,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-04 15:33:29,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-04 15:33:29,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-04 15:33:29,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-04 15:33:29,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-04 15:33:29,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-04 15:33:29,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-04 15:33:29,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-04 15:33:29,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-04 15:33:29,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-04 15:33:29,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-04 15:33:29,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-04 15:33:29,943 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-04 15:33:29,944 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-04 15:33:29,945 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-04 15:33:29,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-04 15:33:29,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-04 15:33:29,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-04 15:33:29,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-04 15:33:29,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-04 15:33:29,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-04 15:33:29,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-04 15:33:29,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-04 15:33:29,951 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-04 15:33:29,974 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-04 15:33:29,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-04 15:33:29,975 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-04 15:33:29,975 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-04 15:33:29,976 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-04 15:33:29,976 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-04 15:33:29,976 INFO L138 SettingsManager]: * Use SBE=true [2021-11-04 15:33:29,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-04 15:33:29,977 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-04 15:33:29,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-04 15:33:29,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-04 15:33:29,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-04 15:33:29,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-04 15:33:29,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-04 15:33:29,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-04 15:33:29,978 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-04 15:33:29,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-04 15:33:29,978 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-04 15:33:29,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-04 15:33:29,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-04 15:33:29,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-04 15:33:29,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-04 15:33:29,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-04 15:33:29,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-04 15:33:29,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-04 15:33:29,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-04 15:33:29,980 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-04 15:33:29,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-04 15:33:29,981 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-04 15:33:29,981 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-04 15:33:29,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-04 15:33:29,981 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-04 15:33:29,981 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f8d40fc3d39b827c494ff373d43bd116589a8fd89c6e972621bd6e0216b2f6d [2021-11-04 15:33:30,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-04 15:33:30,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-04 15:33:30,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-04 15:33:30,185 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-04 15:33:30,186 INFO L275 PluginConnector]: CDTParser initialized [2021-11-04 15:33:30,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i [2021-11-04 15:33:30,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/434e7b833/9c4650b0c92741aea2fc578c1b2ec43b/FLAG9aa29d55b [2021-11-04 15:33:30,761 INFO L306 CDTParser]: Found 1 translation units. [2021-11-04 15:33:30,780 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i [2021-11-04 15:33:30,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/434e7b833/9c4650b0c92741aea2fc578c1b2ec43b/FLAG9aa29d55b [2021-11-04 15:33:31,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/434e7b833/9c4650b0c92741aea2fc578c1b2ec43b [2021-11-04 15:33:31,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-04 15:33:31,070 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-04 15:33:31,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-04 15:33:31,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-04 15:33:31,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-04 15:33:31,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 03:33:31" (1/1) ... [2021-11-04 15:33:31,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4016e73e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:33:31, skipping insertion in model container [2021-11-04 15:33:31,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 03:33:31" (1/1) ... [2021-11-04 15:33:31,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-04 15:33:31,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-04 15:33:31,401 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i[33021,33034] [2021-11-04 15:33:31,493 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i[44124,44137] [2021-11-04 15:33:31,494 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i[44245,44258] [2021-11-04 15:33:31,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-04 15:33:31,522 INFO L203 MainTranslator]: Completed pre-run [2021-11-04 15:33:31,552 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i[33021,33034] [2021-11-04 15:33:31,606 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i[44124,44137] [2021-11-04 15:33:31,607 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i[44245,44258] [2021-11-04 15:33:31,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-04 15:33:31,641 INFO L208 MainTranslator]: Completed translation [2021-11-04 15:33:31,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:33:31 WrapperNode [2021-11-04 15:33:31,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-04 15:33:31,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-04 15:33:31,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-04 15:33:31,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-04 15:33:31,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:33:31" (1/1) ... [2021-11-04 15:33:31,666 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:33:31" (1/1) ... [2021-11-04 15:33:31,705 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-04 15:33:31,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-04 15:33:31,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-04 15:33:31,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-04 15:33:31,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:33:31" (1/1) ... [2021-11-04 15:33:31,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:33:31" (1/1) ... [2021-11-04 15:33:31,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:33:31" (1/1) ... [2021-11-04 15:33:31,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:33:31" (1/1) ... [2021-11-04 15:33:31,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:33:31" (1/1) ... [2021-11-04 15:33:31,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:33:31" (1/1) ... [2021-11-04 15:33:31,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:33:31" (1/1) ... [2021-11-04 15:33:31,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-04 15:33:31,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-04 15:33:31,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-04 15:33:31,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-04 15:33:31,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:33:31" (1/1) ... [2021-11-04 15:33:31,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-04 15:33:31,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 15:33:31,828 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) [2021-11-04 15:33:31,869 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 [2021-11-04 15:33:31,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-04 15:33:31,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-04 15:33:31,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-04 15:33:31,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-04 15:33:31,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-04 15:33:31,881 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-04 15:33:31,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-04 15:33:31,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-04 15:33:31,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-04 15:33:31,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-04 15:33:31,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-04 15:33:32,443 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-04 15:33:32,443 INFO L299 CfgBuilder]: Removed 82 assume(true) statements. [2021-11-04 15:33:32,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 03:33:32 BoogieIcfgContainer [2021-11-04 15:33:32,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-04 15:33:32,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-04 15:33:32,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-04 15:33:32,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-04 15:33:32,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.11 03:33:31" (1/3) ... [2021-11-04 15:33:32,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77655792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 03:33:32, skipping insertion in model container [2021-11-04 15:33:32,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:33:31" (2/3) ... [2021-11-04 15:33:32,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77655792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 03:33:32, skipping insertion in model container [2021-11-04 15:33:32,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 03:33:32" (3/3) ... [2021-11-04 15:33:32,452 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test7-2.i [2021-11-04 15:33:32,455 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-04 15:33:32,456 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-04 15:33:32,496 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-04 15:33:32,507 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-04 15:33:32,507 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-04 15:33:32,526 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 208 states have (on average 1.7067307692307692) internal successors, (355), 210 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-04 15:33:32,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 15:33:32,530 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 15:33:32,530 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 15:33:32,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 15:33:32,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1366407864, now seen corresponding path program 1 times [2021-11-04 15:33:32,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 15:33:32,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862214242] [2021-11-04 15:33:32,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:32,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 15:33:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 15:33:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 15:33:32,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 15:33:32,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862214242] [2021-11-04 15:33:32,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862214242] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 15:33:32,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 15:33:32,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-04 15:33:32,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376551729] [2021-11-04 15:33:32,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 15:33:32,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-04 15:33:32,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 15:33:32,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-04 15:33:32,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-04 15:33:32,728 INFO L87 Difference]: Start difference. First operand has 211 states, 208 states have (on average 1.7067307692307692) internal successors, (355), 210 states have internal predecessors, (355), 0 states have call successors, (0), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:33,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 15:33:33,047 INFO L93 Difference]: Finished difference Result 419 states and 707 transitions. [2021-11-04 15:33:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-04 15:33:33,050 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-04 15:33:33,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 15:33:33,056 INFO L225 Difference]: With dead ends: 419 [2021-11-04 15:33:33,057 INFO L226 Difference]: Without dead ends: 177 [2021-11-04 15:33:33,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-04 15:33:33,061 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 231.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.41ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 286.43ms IncrementalHoareTripleChecker+Time [2021-11-04 15:33:33,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 276 Unknown, 0 Unchecked, 1.41ms Time], IncrementalHoareTripleChecker [0 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 286.43ms Time] [2021-11-04 15:33:33,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-04 15:33:33,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-11-04 15:33:33,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 175 states have (on average 1.3257142857142856) internal successors, (232), 176 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:33,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 232 transitions. [2021-11-04 15:33:33,093 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 232 transitions. Word has length 8 [2021-11-04 15:33:33,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 15:33:33,093 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 232 transitions. [2021-11-04 15:33:33,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:33,093 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 232 transitions. [2021-11-04 15:33:33,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-04 15:33:33,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 15:33:33,094 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 15:33:33,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-04 15:33:33,095 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 15:33:33,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 15:33:33,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1136278917, now seen corresponding path program 1 times [2021-11-04 15:33:33,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 15:33:33,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329187534] [2021-11-04 15:33:33,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:33,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 15:33:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 15:33:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 15:33:33,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 15:33:33,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329187534] [2021-11-04 15:33:33,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329187534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 15:33:33,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 15:33:33,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-04 15:33:33,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055358737] [2021-11-04 15:33:33,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 15:33:33,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-04 15:33:33,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 15:33:33,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-04 15:33:33,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-04 15:33:33,138 INFO L87 Difference]: Start difference. First operand 177 states and 232 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 15:33:33,743 INFO L93 Difference]: Finished difference Result 382 states and 501 transitions. [2021-11-04 15:33:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-04 15:33:33,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-11-04 15:33:33,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 15:33:33,745 INFO L225 Difference]: With dead ends: 382 [2021-11-04 15:33:33,745 INFO L226 Difference]: Without dead ends: 295 [2021-11-04 15:33:33,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.36ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-04 15:33:33,746 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 146 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 475.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.87ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 575.01ms IncrementalHoareTripleChecker+Time [2021-11-04 15:33:33,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 0 Invalid, 722 Unknown, 0 Unchecked, 3.87ms Time], IncrementalHoareTripleChecker [3 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 575.01ms Time] [2021-11-04 15:33:33,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-04 15:33:33,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 179. [2021-11-04 15:33:33,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 177 states have (on average 1.3220338983050848) internal successors, (234), 178 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:33,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 234 transitions. [2021-11-04 15:33:33,756 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 234 transitions. Word has length 10 [2021-11-04 15:33:33,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 15:33:33,756 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 234 transitions. [2021-11-04 15:33:33,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:33,757 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 234 transitions. [2021-11-04 15:33:33,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-04 15:33:33,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 15:33:33,758 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 15:33:33,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-04 15:33:33,759 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 15:33:33,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 15:33:33,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2095912151, now seen corresponding path program 1 times [2021-11-04 15:33:33,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 15:33:33,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085248679] [2021-11-04 15:33:33,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:33,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 15:33:33,775 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 15:33:33,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415110183] [2021-11-04 15:33:33,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:33,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:33,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 15:33:33,777 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) [2021-11-04 15:33:33,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-04 15:33:33,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 15:33:33,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-04 15:33:33,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 15:33:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 15:33:34,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-04 15:33:34,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 15:33:34,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085248679] [2021-11-04 15:33:34,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 15:33:34,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415110183] [2021-11-04 15:33:34,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415110183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 15:33:34,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 15:33:34,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-04 15:33:34,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500100237] [2021-11-04 15:33:34,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 15:33:34,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 15:33:34,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 15:33:34,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 15:33:34,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 15:33:34,079 INFO L87 Difference]: Start difference. First operand 179 states and 234 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:34,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 15:33:34,551 INFO L93 Difference]: Finished difference Result 375 states and 495 transitions. [2021-11-04 15:33:34,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 15:33:34,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-11-04 15:33:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 15:33:34,553 INFO L225 Difference]: With dead ends: 375 [2021-11-04 15:33:34,553 INFO L226 Difference]: Without dead ends: 200 [2021-11-04 15:33:34,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.39ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 15:33:34,554 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 396.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.44ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 460.90ms IncrementalHoareTripleChecker+Time [2021-11-04 15:33:34,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 481 Unknown, 0 Unchecked, 1.44ms Time], IncrementalHoareTripleChecker [28 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 460.90ms Time] [2021-11-04 15:33:34,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-04 15:33:34,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-11-04 15:33:34,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 197 states have (on average 1.2893401015228427) internal successors, (254), 198 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:34,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 254 transitions. [2021-11-04 15:33:34,566 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 254 transitions. Word has length 62 [2021-11-04 15:33:34,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 15:33:34,566 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 254 transitions. [2021-11-04 15:33:34,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 254 transitions. [2021-11-04 15:33:34,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-04 15:33:34,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 15:33:34,568 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 15:33:34,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-04 15:33:34,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:34,784 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 15:33:34,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 15:33:34,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1305568807, now seen corresponding path program 1 times [2021-11-04 15:33:34,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 15:33:34,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527858961] [2021-11-04 15:33:34,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:34,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 15:33:34,806 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 15:33:34,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495655352] [2021-11-04 15:33:34,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:34,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:34,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 15:33:34,832 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) [2021-11-04 15:33:34,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-04 15:33:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 15:33:34,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-04 15:33:34,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 15:33:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 15:33:35,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-04 15:33:35,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 15:33:35,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527858961] [2021-11-04 15:33:35,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 15:33:35,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495655352] [2021-11-04 15:33:35,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495655352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 15:33:35,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 15:33:35,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-04 15:33:35,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104670120] [2021-11-04 15:33:35,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 15:33:35,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-04 15:33:35,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 15:33:35,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-04 15:33:35,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-04 15:33:35,080 INFO L87 Difference]: Start difference. First operand 199 states and 254 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:35,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 15:33:35,472 INFO L93 Difference]: Finished difference Result 386 states and 496 transitions. [2021-11-04 15:33:35,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-04 15:33:35,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-11-04 15:33:35,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 15:33:35,473 INFO L225 Difference]: With dead ends: 386 [2021-11-04 15:33:35,473 INFO L226 Difference]: Without dead ends: 191 [2021-11-04 15:33:35,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.09ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-04 15:33:35,475 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 220 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 317.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.07ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 374.22ms IncrementalHoareTripleChecker+Time [2021-11-04 15:33:35,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 0 Invalid, 486 Unknown, 0 Unchecked, 2.07ms Time], IncrementalHoareTripleChecker [24 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 374.22ms Time] [2021-11-04 15:33:35,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-04 15:33:35,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 185. [2021-11-04 15:33:35,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 183 states have (on average 1.273224043715847) internal successors, (233), 184 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:35,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 233 transitions. [2021-11-04 15:33:35,482 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 233 transitions. Word has length 62 [2021-11-04 15:33:35,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 15:33:35,482 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 233 transitions. [2021-11-04 15:33:35,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:35,482 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 233 transitions. [2021-11-04 15:33:35,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-04 15:33:35,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 15:33:35,483 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 15:33:35,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-04 15:33:35,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-04 15:33:35,700 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 15:33:35,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 15:33:35,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1777715509, now seen corresponding path program 1 times [2021-11-04 15:33:35,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 15:33:35,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349735656] [2021-11-04 15:33:35,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:35,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 15:33:35,732 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 15:33:35,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269424492] [2021-11-04 15:33:35,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:35,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:35,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 15:33:35,733 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) [2021-11-04 15:33:35,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-04 15:33:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 15:33:35,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-04 15:33:35,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 15:33:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 15:33:36,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-04 15:33:36,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 15:33:36,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349735656] [2021-11-04 15:33:36,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 15:33:36,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269424492] [2021-11-04 15:33:36,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269424492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 15:33:36,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 15:33:36,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-04 15:33:36,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128848965] [2021-11-04 15:33:36,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 15:33:36,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 15:33:36,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 15:33:36,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 15:33:36,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 15:33:36,089 INFO L87 Difference]: Start difference. First operand 185 states and 233 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:36,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 15:33:36,559 INFO L93 Difference]: Finished difference Result 479 states and 602 transitions. [2021-11-04 15:33:36,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 15:33:36,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-11-04 15:33:36,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 15:33:36,561 INFO L225 Difference]: With dead ends: 479 [2021-11-04 15:33:36,561 INFO L226 Difference]: Without dead ends: 298 [2021-11-04 15:33:36,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.74ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 15:33:36,562 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 105 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 389.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.27ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 455.00ms IncrementalHoareTripleChecker+Time [2021-11-04 15:33:36,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 0 Invalid, 495 Unknown, 0 Unchecked, 1.27ms Time], IncrementalHoareTripleChecker [5 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 455.00ms Time] [2021-11-04 15:33:36,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-04 15:33:36,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 291. [2021-11-04 15:33:36,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 289 states have (on average 1.2664359861591696) internal successors, (366), 290 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 366 transitions. [2021-11-04 15:33:36,578 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 366 transitions. Word has length 62 [2021-11-04 15:33:36,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 15:33:36,579 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 366 transitions. [2021-11-04 15:33:36,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:36,579 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 366 transitions. [2021-11-04 15:33:36,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-04 15:33:36,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 15:33:36,580 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 15:33:36,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-04 15:33:36,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:36,799 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 15:33:36,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 15:33:36,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1300403396, now seen corresponding path program 1 times [2021-11-04 15:33:36,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 15:33:36,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703034625] [2021-11-04 15:33:36,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:36,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 15:33:36,838 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 15:33:36,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45771323] [2021-11-04 15:33:36,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:36,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:36,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 15:33:36,860 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) [2021-11-04 15:33:36,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-04 15:33:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 15:33:37,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-04 15:33:37,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 15:33:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 15:33:37,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-04 15:33:37,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 15:33:37,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703034625] [2021-11-04 15:33:37,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 15:33:37,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45771323] [2021-11-04 15:33:37,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45771323] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 15:33:37,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 15:33:37,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-04 15:33:37,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569297763] [2021-11-04 15:33:37,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 15:33:37,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 15:33:37,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 15:33:37,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 15:33:37,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 15:33:37,235 INFO L87 Difference]: Start difference. First operand 291 states and 366 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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) [2021-11-04 15:33:37,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 15:33:37,668 INFO L93 Difference]: Finished difference Result 536 states and 683 transitions. [2021-11-04 15:33:37,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 15:33:37,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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) Word has length 69 [2021-11-04 15:33:37,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 15:33:37,670 INFO L225 Difference]: With dead ends: 536 [2021-11-04 15:33:37,670 INFO L226 Difference]: Without dead ends: 293 [2021-11-04 15:33:37,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.87ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 15:33:37,671 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 358.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.10ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 419.83ms IncrementalHoareTripleChecker+Time [2021-11-04 15:33:37,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 450 Unknown, 0 Unchecked, 1.10ms Time], IncrementalHoareTripleChecker [2 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 419.83ms Time] [2021-11-04 15:33:37,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-04 15:33:37,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-11-04 15:33:37,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 291 states have (on average 1.2646048109965635) internal successors, (368), 292 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:37,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 368 transitions. [2021-11-04 15:33:37,677 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 368 transitions. Word has length 69 [2021-11-04 15:33:37,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 15:33:37,678 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 368 transitions. [2021-11-04 15:33:37,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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) [2021-11-04 15:33:37,678 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 368 transitions. [2021-11-04 15:33:37,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-04 15:33:37,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 15:33:37,679 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 15:33:37,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-04 15:33:37,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:37,894 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 15:33:37,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 15:33:37,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1522577957, now seen corresponding path program 1 times [2021-11-04 15:33:37,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 15:33:37,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167517402] [2021-11-04 15:33:37,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:37,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 15:33:37,910 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 15:33:37,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432334975] [2021-11-04 15:33:37,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:37,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:37,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 15:33:37,916 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) [2021-11-04 15:33:37,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-04 15:33:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 15:33:38,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-04 15:33:38,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 15:33:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-04 15:33:38,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-04 15:33:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-04 15:33:38,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 15:33:38,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167517402] [2021-11-04 15:33:38,357 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 15:33:38,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432334975] [2021-11-04 15:33:38,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432334975] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-04 15:33:38,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-04 15:33:38,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-04 15:33:38,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001046972] [2021-11-04 15:33:38,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-04 15:33:38,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-04 15:33:38,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 15:33:38,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-04 15:33:38,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-04 15:33:38,359 INFO L87 Difference]: Start difference. First operand 293 states and 368 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:38,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 15:33:38,701 INFO L93 Difference]: Finished difference Result 544 states and 695 transitions. [2021-11-04 15:33:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-04 15:33:38,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 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 71 [2021-11-04 15:33:38,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 15:33:38,703 INFO L225 Difference]: With dead ends: 544 [2021-11-04 15:33:38,703 INFO L226 Difference]: Without dead ends: 299 [2021-11-04 15:33:38,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.32ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-04 15:33:38,704 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 281.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.84ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 330.89ms IncrementalHoareTripleChecker+Time [2021-11-04 15:33:38,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 469 Unknown, 0 Unchecked, 0.84ms Time], IncrementalHoareTripleChecker [15 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 330.89ms Time] [2021-11-04 15:33:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-04 15:33:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2021-11-04 15:33:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 297 states have (on average 1.2592592592592593) internal successors, (374), 298 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:38,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 374 transitions. [2021-11-04 15:33:38,709 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 374 transitions. Word has length 71 [2021-11-04 15:33:38,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 15:33:38,709 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 374 transitions. [2021-11-04 15:33:38,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:38,709 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 374 transitions. [2021-11-04 15:33:38,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-04 15:33:38,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 15:33:38,710 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 15:33:38,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-04 15:33:38,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:38,924 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 15:33:38,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 15:33:38,925 INFO L85 PathProgramCache]: Analyzing trace with hash 784896644, now seen corresponding path program 2 times [2021-11-04 15:33:38,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 15:33:38,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667515145] [2021-11-04 15:33:38,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:38,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 15:33:38,935 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 15:33:38,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62871105] [2021-11-04 15:33:38,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-04 15:33:38,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:38,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 15:33:38,937 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) [2021-11-04 15:33:38,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-04 15:33:39,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-04 15:33:39,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-04 15:33:39,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-04 15:33:39,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 15:33:39,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-04 15:33:39,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-04 15:33:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-04 15:33:39,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-04 15:33:39,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 15:33:39,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667515145] [2021-11-04 15:33:39,148 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 15:33:39,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62871105] [2021-11-04 15:33:39,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62871105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 15:33:39,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 15:33:39,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-04 15:33:39,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592749698] [2021-11-04 15:33:39,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 15:33:39,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-04 15:33:39,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 15:33:39,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-04 15:33:39,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-04 15:33:39,149 INFO L87 Difference]: Start difference. First operand 299 states and 374 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:40,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 15:33:40,637 INFO L93 Difference]: Finished difference Result 387 states and 491 transitions. [2021-11-04 15:33:40,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-04 15:33:40,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 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 77 [2021-11-04 15:33:40,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 15:33:40,639 INFO L225 Difference]: With dead ends: 387 [2021-11-04 15:33:40,639 INFO L226 Difference]: Without dead ends: 383 [2021-11-04 15:33:40,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.52ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-04 15:33:40,640 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 135 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1334.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.16ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1465.28ms IncrementalHoareTripleChecker+Time [2021-11-04 15:33:40,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 0 Invalid, 701 Unknown, 0 Unchecked, 2.16ms Time], IncrementalHoareTripleChecker [3 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 1465.28ms Time] [2021-11-04 15:33:40,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-11-04 15:33:40,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 301. [2021-11-04 15:33:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 299 states have (on average 1.2575250836120402) internal successors, (376), 300 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:40,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 376 transitions. [2021-11-04 15:33:40,645 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 376 transitions. Word has length 77 [2021-11-04 15:33:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 15:33:40,646 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 376 transitions. [2021-11-04 15:33:40,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 376 transitions. [2021-11-04 15:33:40,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-04 15:33:40,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 15:33:40,647 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 15:33:40,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-04 15:33:40,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:40,866 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 15:33:40,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 15:33:40,867 INFO L85 PathProgramCache]: Analyzing trace with hash 819064170, now seen corresponding path program 1 times [2021-11-04 15:33:40,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 15:33:40,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928151955] [2021-11-04 15:33:40,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:40,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 15:33:40,877 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 15:33:40,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926658059] [2021-11-04 15:33:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:40,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:40,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 15:33:40,878 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) [2021-11-04 15:33:40,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-04 15:33:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 15:33:41,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-04 15:33:41,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 15:33:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-04 15:33:41,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-04 15:33:41,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 15:33:41,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928151955] [2021-11-04 15:33:41,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 15:33:41,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926658059] [2021-11-04 15:33:41,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926658059] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 15:33:41,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 15:33:41,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-04 15:33:41,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980695385] [2021-11-04 15:33:41,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 15:33:41,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 15:33:41,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 15:33:41,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 15:33:41,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 15:33:41,215 INFO L87 Difference]: Start difference. First operand 301 states and 376 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:41,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 15:33:41,588 INFO L93 Difference]: Finished difference Result 491 states and 635 transitions. [2021-11-04 15:33:41,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 15:33:41,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 [2021-11-04 15:33:41,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 15:33:41,590 INFO L225 Difference]: With dead ends: 491 [2021-11-04 15:33:41,590 INFO L226 Difference]: Without dead ends: 343 [2021-11-04 15:33:41,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.33ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 15:33:41,596 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 303.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.12ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 360.36ms IncrementalHoareTripleChecker+Time [2021-11-04 15:33:41,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 467 Unknown, 0 Unchecked, 1.12ms Time], IncrementalHoareTripleChecker [28 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 360.36ms Time] [2021-11-04 15:33:41,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-04 15:33:41,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2021-11-04 15:33:41,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 339 states have (on average 1.2271386430678466) internal successors, (416), 340 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:41,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 416 transitions. [2021-11-04 15:33:41,603 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 416 transitions. Word has length 111 [2021-11-04 15:33:41,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 15:33:41,604 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 416 transitions. [2021-11-04 15:33:41,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 416 transitions. [2021-11-04 15:33:41,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-04 15:33:41,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 15:33:41,605 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 15:33:41,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-04 15:33:41,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:41,823 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 15:33:41,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 15:33:41,824 INFO L85 PathProgramCache]: Analyzing trace with hash 498859118, now seen corresponding path program 1 times [2021-11-04 15:33:41,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 15:33:41,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78396828] [2021-11-04 15:33:41,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:41,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 15:33:41,834 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 15:33:41,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711740017] [2021-11-04 15:33:41,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:41,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:41,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 15:33:41,836 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) [2021-11-04 15:33:41,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-04 15:33:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 15:33:41,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-04 15:33:41,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 15:33:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-04 15:33:42,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-04 15:33:42,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 15:33:42,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78396828] [2021-11-04 15:33:42,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 15:33:42,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711740017] [2021-11-04 15:33:42,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711740017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 15:33:42,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 15:33:42,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-04 15:33:42,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975920647] [2021-11-04 15:33:42,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 15:33:42,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-04 15:33:42,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 15:33:42,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-04 15:33:42,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-04 15:33:42,098 INFO L87 Difference]: Start difference. First operand 341 states and 416 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:42,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 15:33:42,552 INFO L93 Difference]: Finished difference Result 506 states and 630 transitions. [2021-11-04 15:33:42,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-04 15:33:42,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 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 [2021-11-04 15:33:42,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 15:33:42,554 INFO L225 Difference]: With dead ends: 506 [2021-11-04 15:33:42,554 INFO L226 Difference]: Without dead ends: 318 [2021-11-04 15:33:42,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.92ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-04 15:33:42,555 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 103 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 350.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.54ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 436.85ms IncrementalHoareTripleChecker+Time [2021-11-04 15:33:42,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 0 Invalid, 576 Unknown, 0 Unchecked, 1.54ms Time], IncrementalHoareTripleChecker [24 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 436.85ms Time] [2021-11-04 15:33:42,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-04 15:33:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 313. [2021-11-04 15:33:42,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 311 states have (on average 1.202572347266881) internal successors, (374), 312 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 374 transitions. [2021-11-04 15:33:42,562 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 374 transitions. Word has length 111 [2021-11-04 15:33:42,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 15:33:42,562 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 374 transitions. [2021-11-04 15:33:42,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:42,562 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 374 transitions. [2021-11-04 15:33:42,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-04 15:33:42,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 15:33:42,563 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 15:33:42,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-04 15:33:42,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-04 15:33:42,775 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 15:33:42,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 15:33:42,776 INFO L85 PathProgramCache]: Analyzing trace with hash -383989728, now seen corresponding path program 1 times [2021-11-04 15:33:42,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 15:33:42,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059065681] [2021-11-04 15:33:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:42,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 15:33:42,792 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 15:33:42,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85118914] [2021-11-04 15:33:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:42,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:42,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 15:33:42,801 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) [2021-11-04 15:33:42,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-04 15:33:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 15:33:42,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-04 15:33:42,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 15:33:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-04 15:33:43,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-04 15:33:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-04 15:33:43,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 15:33:43,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059065681] [2021-11-04 15:33:43,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 15:33:43,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85118914] [2021-11-04 15:33:43,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85118914] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-04 15:33:43,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-04 15:33:43,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-04 15:33:43,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884805340] [2021-11-04 15:33:43,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-04 15:33:43,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-04 15:33:43,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 15:33:43,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-04 15:33:43,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-04 15:33:43,276 INFO L87 Difference]: Start difference. First operand 313 states and 374 transitions. Second operand has 12 states, 12 states have (on average 9.5) internal successors, (114), 12 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:44,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 15:33:44,908 INFO L93 Difference]: Finished difference Result 590 states and 719 transitions. [2021-11-04 15:33:44,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-04 15:33:44,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.5) internal successors, (114), 12 states have internal predecessors, (114), 0 states have call successors, (0), 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 [2021-11-04 15:33:44,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 15:33:44,910 INFO L225 Difference]: With dead ends: 590 [2021-11-04 15:33:44,910 INFO L226 Difference]: Without dead ends: 325 [2021-11-04 15:33:44,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.91ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-04 15:33:44,910 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1487.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.91ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1608.54ms IncrementalHoareTripleChecker+Time [2021-11-04 15:33:44,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1124 Unknown, 0 Unchecked, 2.91ms Time], IncrementalHoareTripleChecker [30 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 1608.54ms Time] [2021-11-04 15:33:44,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-04 15:33:44,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2021-11-04 15:33:44,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 323 states have (on average 1.195046439628483) internal successors, (386), 324 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:44,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 386 transitions. [2021-11-04 15:33:44,918 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 386 transitions. Word has length 111 [2021-11-04 15:33:44,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 15:33:44,918 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 386 transitions. [2021-11-04 15:33:44,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.5) internal successors, (114), 12 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:44,918 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 386 transitions. [2021-11-04 15:33:44,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-04 15:33:44,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 15:33:44,919 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 15:33:44,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-04 15:33:45,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:45,139 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 15:33:45,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 15:33:45,140 INFO L85 PathProgramCache]: Analyzing trace with hash 562680000, now seen corresponding path program 2 times [2021-11-04 15:33:45,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 15:33:45,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231277288] [2021-11-04 15:33:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:45,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 15:33:45,153 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 15:33:45,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105510017] [2021-11-04 15:33:45,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-04 15:33:45,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:45,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 15:33:45,163 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) [2021-11-04 15:33:45,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-04 15:33:45,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-04 15:33:45,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-04 15:33:45,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-04 15:33:45,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 15:33:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-04 15:33:45,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-04 15:33:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-04 15:33:45,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 15:33:45,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231277288] [2021-11-04 15:33:45,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 15:33:45,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105510017] [2021-11-04 15:33:45,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105510017] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-04 15:33:45,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-04 15:33:45,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-04 15:33:45,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594900331] [2021-11-04 15:33:45,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-04 15:33:45,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-04 15:33:45,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 15:33:45,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-04 15:33:45,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-04 15:33:45,985 INFO L87 Difference]: Start difference. First operand 325 states and 386 transitions. Second operand has 24 states, 24 states have (on average 5.25) internal successors, (126), 24 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:46,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 15:33:46,546 INFO L93 Difference]: Finished difference Result 626 states and 767 transitions. [2021-11-04 15:33:46,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-04 15:33:46,547 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.25) internal successors, (126), 24 states have internal predecessors, (126), 0 states have call successors, (0), 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 123 [2021-11-04 15:33:46,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 15:33:46,548 INFO L225 Difference]: With dead ends: 626 [2021-11-04 15:33:46,548 INFO L226 Difference]: Without dead ends: 349 [2021-11-04 15:33:46,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 242.36ms TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-04 15:33:46,548 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 428.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.04ms SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 520.93ms IncrementalHoareTripleChecker+Time [2021-11-04 15:33:46,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 781 Unknown, 0 Unchecked, 2.04ms Time], IncrementalHoareTripleChecker [91 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 520.93ms Time] [2021-11-04 15:33:46,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-04 15:33:46,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2021-11-04 15:33:46,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 347 states have (on average 1.181556195965418) internal successors, (410), 348 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:46,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 410 transitions. [2021-11-04 15:33:46,556 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 410 transitions. Word has length 123 [2021-11-04 15:33:46,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 15:33:46,556 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 410 transitions. [2021-11-04 15:33:46,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.25) internal successors, (126), 24 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:46,556 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 410 transitions. [2021-11-04 15:33:46,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-04 15:33:46,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 15:33:46,557 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 15:33:46,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-04 15:33:46,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-04 15:33:46,758 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 15:33:46,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 15:33:46,758 INFO L85 PathProgramCache]: Analyzing trace with hash -27956736, now seen corresponding path program 3 times [2021-11-04 15:33:46,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 15:33:46,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786363654] [2021-11-04 15:33:46,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:46,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 15:33:46,768 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 15:33:46,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339344262] [2021-11-04 15:33:46,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-04 15:33:46,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:46,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 15:33:46,769 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-04 15:33:46,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-04 15:33:46,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-04 15:33:46,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-04 15:33:46,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-04 15:33:46,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 15:33:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-04 15:33:47,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-04 15:33:47,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 15:33:47,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786363654] [2021-11-04 15:33:47,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 15:33:47,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339344262] [2021-11-04 15:33:47,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339344262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 15:33:47,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 15:33:47,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-04 15:33:47,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213043981] [2021-11-04 15:33:47,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 15:33:47,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-04 15:33:47,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 15:33:47,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-04 15:33:47,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-04 15:33:47,163 INFO L87 Difference]: Start difference. First operand 349 states and 410 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:47,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 15:33:47,528 INFO L93 Difference]: Finished difference Result 741 states and 878 transitions. [2021-11-04 15:33:47,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-04 15:33:47,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 147 [2021-11-04 15:33:47,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 15:33:47,536 INFO L225 Difference]: With dead ends: 741 [2021-11-04 15:33:47,536 INFO L226 Difference]: Without dead ends: 440 [2021-11-04 15:33:47,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.66ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-04 15:33:47,542 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 414 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 283.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.52ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 327.04ms IncrementalHoareTripleChecker+Time [2021-11-04 15:33:47,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 0 Invalid, 442 Unknown, 0 Unchecked, 3.52ms Time], IncrementalHoareTripleChecker [4 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 327.04ms Time] [2021-11-04 15:33:47,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-04 15:33:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 433. [2021-11-04 15:33:47,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 431 states have (on average 1.1925754060324827) internal successors, (514), 432 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 514 transitions. [2021-11-04 15:33:47,583 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 514 transitions. Word has length 147 [2021-11-04 15:33:47,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 15:33:47,583 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 514 transitions. [2021-11-04 15:33:47,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:47,583 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 514 transitions. [2021-11-04 15:33:47,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-04 15:33:47,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 15:33:47,584 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 15:33:47,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-04 15:33:47,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-04 15:33:47,802 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 15:33:47,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 15:33:47,802 INFO L85 PathProgramCache]: Analyzing trace with hash -535720422, now seen corresponding path program 1 times [2021-11-04 15:33:47,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 15:33:47,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108566293] [2021-11-04 15:33:47,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:47,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 15:33:47,817 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 15:33:47,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986634520] [2021-11-04 15:33:47,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:47,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:47,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 15:33:47,833 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-04 15:33:47,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-04 15:33:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 15:33:48,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-04 15:33:48,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 15:33:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-04 15:33:48,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-04 15:33:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-04 15:33:49,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 15:33:49,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108566293] [2021-11-04 15:33:49,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 15:33:49,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986634520] [2021-11-04 15:33:49,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986634520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-04 15:33:49,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-04 15:33:49,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-11-04 15:33:49,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683931691] [2021-11-04 15:33:49,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-04 15:33:49,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-04 15:33:49,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 15:33:49,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-04 15:33:49,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=1129, Unknown=0, NotChecked=0, Total=2256 [2021-11-04 15:33:49,452 INFO L87 Difference]: Start difference. First operand 433 states and 514 transitions. Second operand has 48 states, 48 states have (on average 3.2708333333333335) internal successors, (157), 48 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:50,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 15:33:50,448 INFO L93 Difference]: Finished difference Result 837 states and 1037 transitions. [2021-11-04 15:33:50,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-04 15:33:50,448 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.2708333333333335) internal successors, (157), 48 states have internal predecessors, (157), 0 states have call successors, (0), 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 154 [2021-11-04 15:33:50,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 15:33:50,450 INFO L225 Difference]: With dead ends: 837 [2021-11-04 15:33:50,450 INFO L226 Difference]: Without dead ends: 477 [2021-11-04 15:33:50,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 893.28ms TimeCoverageRelationStatistics Valid=1127, Invalid=1129, Unknown=0, NotChecked=0, Total=2256 [2021-11-04 15:33:50,451 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 778.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.94ms SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 933.54ms IncrementalHoareTripleChecker+Time [2021-11-04 15:33:50,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1591 Unknown, 0 Unchecked, 2.94ms Time], IncrementalHoareTripleChecker [213 Valid, 1378 Invalid, 0 Unknown, 0 Unchecked, 933.54ms Time] [2021-11-04 15:33:50,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-11-04 15:33:50,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 477. [2021-11-04 15:33:50,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 475 states have (on average 1.174736842105263) internal successors, (558), 476 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 558 transitions. [2021-11-04 15:33:50,468 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 558 transitions. Word has length 154 [2021-11-04 15:33:50,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 15:33:50,468 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 558 transitions. [2021-11-04 15:33:50,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.2708333333333335) internal successors, (157), 48 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:50,469 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 558 transitions. [2021-11-04 15:33:50,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-04 15:33:50,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 15:33:50,470 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 15:33:50,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-04 15:33:50,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-04 15:33:50,683 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 15:33:50,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 15:33:50,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1925067386, now seen corresponding path program 2 times [2021-11-04 15:33:50,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 15:33:50,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184264655] [2021-11-04 15:33:50,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:50,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 15:33:50,696 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 15:33:50,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085916576] [2021-11-04 15:33:50,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-04 15:33:50,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:50,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 15:33:50,698 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-04 15:33:50,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-04 15:33:50,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-04 15:33:50,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-04 15:33:50,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-04 15:33:50,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 15:33:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1982 backedges. 2 proven. 990 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-11-04 15:33:52,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-04 15:33:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1982 backedges. 2 proven. 990 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-11-04 15:33:55,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 15:33:55,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184264655] [2021-11-04 15:33:55,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 15:33:55,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085916576] [2021-11-04 15:33:55,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085916576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-04 15:33:55,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-04 15:33:55,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 92 [2021-11-04 15:33:55,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812473575] [2021-11-04 15:33:55,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-04 15:33:55,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-04 15:33:55,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 15:33:55,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-04 15:33:55,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-11-04 15:33:55,293 INFO L87 Difference]: Start difference. First operand 477 states and 558 transitions. Second operand has 92 states, 92 states have (on average 2.1847826086956523) internal successors, (201), 92 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 15:33:57,375 INFO L93 Difference]: Finished difference Result 858 states and 1059 transitions. [2021-11-04 15:33:57,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-04 15:33:57,384 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.1847826086956523) internal successors, (201), 92 states have internal predecessors, (201), 0 states have call successors, (0), 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 198 [2021-11-04 15:33:57,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 15:33:57,385 INFO L225 Difference]: With dead ends: 858 [2021-11-04 15:33:57,385 INFO L226 Difference]: Without dead ends: 523 [2021-11-04 15:33:57,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3651.53ms TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-11-04 15:33:57,390 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1778.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.46ms SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2001.44ms IncrementalHoareTripleChecker+Time [2021-11-04 15:33:57,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1824 Unknown, 0 Unchecked, 2.46ms Time], IncrementalHoareTripleChecker [180 Valid, 1644 Invalid, 0 Unknown, 0 Unchecked, 2001.44ms Time] [2021-11-04 15:33:57,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-04 15:33:57,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 523. [2021-11-04 15:33:57,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 521 states have (on average 1.1593090211132437) internal successors, (604), 522 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:57,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 604 transitions. [2021-11-04 15:33:57,400 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 604 transitions. Word has length 198 [2021-11-04 15:33:57,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 15:33:57,401 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 604 transitions. [2021-11-04 15:33:57,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.1847826086956523) internal successors, (201), 92 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 15:33:57,401 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 604 transitions. [2021-11-04 15:33:57,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-04 15:33:57,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 15:33:57,402 INFO L514 BasicCegarLoop]: trace histogram [90, 44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 15:33:57,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-04 15:33:57,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-04 15:33:57,615 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 15:33:57,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 15:33:57,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1358050298, now seen corresponding path program 3 times [2021-11-04 15:33:57,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 15:33:57,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599324447] [2021-11-04 15:33:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 15:33:57,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 15:33:57,634 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 15:33:57,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706427757] [2021-11-04 15:33:57,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-04 15:33:57,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 15:33:57,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 15:33:57,635 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-04 15:33:57,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process Killed by 15