./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5b36d44f 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_SAX_test7-1.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 67499ec0709cfdcc368630c5b1d94f26157589b8bf16f22cf5d62554760c6dd7 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5b36d44 [2021-11-07 22:42:18,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 22:42:18,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 22:42:18,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 22:42:18,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 22:42:18,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 22:42:18,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 22:42:18,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 22:42:18,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 22:42:18,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 22:42:18,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 22:42:18,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 22:42:18,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 22:42:18,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 22:42:18,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 22:42:18,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 22:42:18,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 22:42:18,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 22:42:18,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 22:42:18,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 22:42:18,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 22:42:18,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 22:42:18,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 22:42:18,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 22:42:18,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 22:42:18,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 22:42:18,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 22:42:18,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 22:42:18,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 22:42:18,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 22:42:18,950 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 22:42:18,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 22:42:18,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 22:42:18,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 22:42:18,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 22:42:18,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 22:42:18,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 22:42:18,953 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 22:42:18,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 22:42:18,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 22:42:18,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 22:42:18,955 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 22:42:18,971 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 22:42:18,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 22:42:18,972 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 22:42:18,972 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 22:42:18,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 22:42:18,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 22:42:18,973 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 22:42:18,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 22:42:18,974 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 22:42:18,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 22:42:18,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 22:42:18,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 22:42:18,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 22:42:18,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 22:42:18,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 22:42:18,975 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 22:42:18,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 22:42:18,975 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 22:42:18,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 22:42:18,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 22:42:18,976 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 22:42:18,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 22:42:18,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 22:42:18,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 22:42:18,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 22:42:18,977 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 22:42:18,977 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 22:42:18,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 22:42:18,978 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 22:42:18,978 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 22:42:18,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 22:42:18,978 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 22:42:18,979 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67499ec0709cfdcc368630c5b1d94f26157589b8bf16f22cf5d62554760c6dd7 [2021-11-07 22:42:19,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 22:42:19,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 22:42:19,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 22:42:19,147 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 22:42:19,147 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 22:42:19,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i [2021-11-07 22:42:19,197 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95db10d2f/991cdc49b30b421b9ac618b0da88a927/FLAGf7abd1d68 [2021-11-07 22:42:19,678 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 22:42:19,683 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i [2021-11-07 22:42:19,701 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95db10d2f/991cdc49b30b421b9ac618b0da88a927/FLAGf7abd1d68 [2021-11-07 22:42:19,714 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95db10d2f/991cdc49b30b421b9ac618b0da88a927 [2021-11-07 22:42:19,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 22:42:19,716 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 22:42:19,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 22:42:19,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 22:42:19,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 22:42:19,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 10:42:19" (1/1) ... [2021-11-07 22:42:19,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ec9e88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:19, skipping insertion in model container [2021-11-07 22:42:19,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 10:42:19" (1/1) ... [2021-11-07 22:42:19,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 22:42:19,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 22:42:20,010 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_SAX_test7-1.i[33021,33034] [2021-11-07 22:42:20,081 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_SAX_test7-1.i[44124,44137] [2021-11-07 22:42:20,092 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_SAX_test7-1.i[44245,44258] [2021-11-07 22:42:20,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 22:42:20,106 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 22:42:20,142 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_SAX_test7-1.i[33021,33034] [2021-11-07 22:42:20,182 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_SAX_test7-1.i[44124,44137] [2021-11-07 22:42:20,183 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_SAX_test7-1.i[44245,44258] [2021-11-07 22:42:20,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 22:42:20,210 INFO L208 MainTranslator]: Completed translation [2021-11-07 22:42:20,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:20 WrapperNode [2021-11-07 22:42:20,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 22:42:20,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 22:42:20,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 22:42:20,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 22:42:20,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:20" (1/1) ... [2021-11-07 22:42:20,237 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:20" (1/1) ... [2021-11-07 22:42:20,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 22:42:20,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 22:42:20,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 22:42:20,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 22:42:20,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:20" (1/1) ... [2021-11-07 22:42:20,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:20" (1/1) ... [2021-11-07 22:42:20,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:20" (1/1) ... [2021-11-07 22:42:20,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:20" (1/1) ... [2021-11-07 22:42:20,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:20" (1/1) ... [2021-11-07 22:42:20,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:20" (1/1) ... [2021-11-07 22:42:20,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:20" (1/1) ... [2021-11-07 22:42:20,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 22:42:20,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 22:42:20,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 22:42:20,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 22:42:20,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:20" (1/1) ... [2021-11-07 22:42:20,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 22:42:20,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 22:42:20,377 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) [2021-11-07 22:42:20,399 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 [2021-11-07 22:42:20,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 22:42:20,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 22:42:20,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 22:42:20,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 22:42:20,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 22:42:20,411 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 22:42:20,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 22:42:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 22:42:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 22:42:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 22:42:20,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 22:42:21,205 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 22:42:21,205 INFO L299 CfgBuilder]: Removed 73 assume(true) statements. [2021-11-07 22:42:21,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 10:42:21 BoogieIcfgContainer [2021-11-07 22:42:21,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 22:42:21,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 22:42:21,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 22:42:21,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 22:42:21,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 10:42:19" (1/3) ... [2021-11-07 22:42:21,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb8f756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 10:42:21, skipping insertion in model container [2021-11-07 22:42:21,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:20" (2/3) ... [2021-11-07 22:42:21,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb8f756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 10:42:21, skipping insertion in model container [2021-11-07 22:42:21,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 10:42:21" (3/3) ... [2021-11-07 22:42:21,212 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test7-1.i [2021-11-07 22:42:21,216 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 22:42:21,216 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 22:42:21,256 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 22:42:21,262 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 [2021-11-07 22:42:21,262 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 22:42:21,284 INFO L276 IsEmpty]: Start isEmpty. Operand has 182 states, 179 states have (on average 1.7094972067039107) internal successors, (306), 181 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:21,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 22:42:21,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:42:21,289 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 22:42:21,289 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:42:21,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:42:21,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1366407864, now seen corresponding path program 1 times [2021-11-07 22:42:21,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 22:42:21,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856567130] [2021-11-07 22:42:21,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:21,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 22:42:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 22:42:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 22:42:21,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 22:42:21,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856567130] [2021-11-07 22:42:21,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856567130] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 22:42:21,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 22:42:21,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 22:42:21,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068579695] [2021-11-07 22:42:21,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 22:42:21,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 22:42:21,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 22:42:21,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 22:42:21,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 22:42:21,457 INFO L87 Difference]: Start difference. First operand has 182 states, 179 states have (on average 1.7094972067039107) internal successors, (306), 181 states have internal predecessors, (306), 0 states have call successors, (0), 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) [2021-11-07 22:42:21,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:42:21,486 INFO L93 Difference]: Finished difference Result 361 states and 609 transitions. [2021-11-07 22:42:21,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 22:42:21,487 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 [2021-11-07 22:42:21,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:42:21,494 INFO L225 Difference]: With dead ends: 361 [2021-11-07 22:42:21,494 INFO L226 Difference]: Without dead ends: 177 [2021-11-07 22:42:21,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.02ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 22:42:21,499 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.05ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-07 22:42:21,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 2.05ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-07 22:42:21,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-07 22:42:21,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-11-07 22:42:21,530 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) [2021-11-07 22:42:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 232 transitions. [2021-11-07 22:42:21,536 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 232 transitions. Word has length 8 [2021-11-07 22:42:21,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:42:21,537 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 232 transitions. [2021-11-07 22:42:21,537 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) [2021-11-07 22:42:21,537 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 232 transitions. [2021-11-07 22:42:21,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 22:42:21,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:42:21,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 22:42:21,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 22:42:21,538 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:42:21,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:42:21,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1136278917, now seen corresponding path program 1 times [2021-11-07 22:42:21,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 22:42:21,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510826992] [2021-11-07 22:42:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:21,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 22:42:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 22:42:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 22:42:21,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 22:42:21,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510826992] [2021-11-07 22:42:21,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510826992] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 22:42:21,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 22:42:21,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 22:42:21,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622440015] [2021-11-07 22:42:21,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 22:42:21,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 22:42:21,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 22:42:21,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 22:42:21,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 22:42:21,613 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) [2021-11-07 22:42:21,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:42:21,942 INFO L93 Difference]: Finished difference Result 382 states and 501 transitions. [2021-11-07 22:42:21,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 22:42:21,943 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 [2021-11-07 22:42:21,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:42:21,944 INFO L225 Difference]: With dead ends: 382 [2021-11-07 22:42:21,944 INFO L226 Difference]: Without dead ends: 295 [2021-11-07 22:42:21,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.07ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 22:42:21,945 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 146 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 231.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.33ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 286.27ms IncrementalHoareTripleChecker+Time [2021-11-07 22:42:21,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 564 Invalid, 158 Unknown, 0 Unchecked, 7.33ms Time], IncrementalHoareTripleChecker [3 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 286.27ms Time] [2021-11-07 22:42:21,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-07 22:42:21,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 179. [2021-11-07 22:42:21,954 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) [2021-11-07 22:42:21,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 234 transitions. [2021-11-07 22:42:21,954 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 234 transitions. Word has length 10 [2021-11-07 22:42:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:42:21,955 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 234 transitions. [2021-11-07 22:42:21,955 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) [2021-11-07 22:42:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 234 transitions. [2021-11-07 22:42:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 22:42:21,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:42:21,956 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] [2021-11-07 22:42:21,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 22:42:21,957 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:42:21,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:42:21,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2095912151, now seen corresponding path program 1 times [2021-11-07 22:42:21,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 22:42:21,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112762574] [2021-11-07 22:42:21,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:21,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 22:42:21,971 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 22:42:21,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77295801] [2021-11-07 22:42:21,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:21,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 22:42:21,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 22:42:21,973 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) [2021-11-07 22:42:21,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 22:42:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 22:42:22,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 22:42:22,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:42:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 22:42:22,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 22:42:22,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 22:42:22,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112762574] [2021-11-07 22:42:22,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 22:42:22,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77295801] [2021-11-07 22:42:22,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77295801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 22:42:22,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 22:42:22,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 22:42:22,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298878470] [2021-11-07 22:42:22,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 22:42:22,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 22:42:22,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 22:42:22,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 22:42:22,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 22:42:22,253 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) [2021-11-07 22:42:22,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:42:22,305 INFO L93 Difference]: Finished difference Result 375 states and 495 transitions. [2021-11-07 22:42:22,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 22:42:22,305 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 [2021-11-07 22:42:22,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:42:22,309 INFO L225 Difference]: With dead ends: 375 [2021-11-07 22:42:22,309 INFO L226 Difference]: Without dead ends: 200 [2021-11-07 22:42:22,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.52ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 22:42:22,314 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 9 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.26ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.51ms IncrementalHoareTripleChecker+Time [2021-11-07 22:42:22,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 409 Invalid, 72 Unknown, 0 Unchecked, 1.26ms Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 42.51ms Time] [2021-11-07 22:42:22,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-07 22:42:22,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-11-07 22:42:22,353 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) [2021-11-07 22:42:22,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 254 transitions. [2021-11-07 22:42:22,356 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 254 transitions. Word has length 62 [2021-11-07 22:42:22,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:42:22,356 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 254 transitions. [2021-11-07 22:42:22,356 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) [2021-11-07 22:42:22,357 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 254 transitions. [2021-11-07 22:42:22,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 22:42:22,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:42:22,358 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] [2021-11-07 22:42:22,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 22:42:22,568 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 [2021-11-07 22:42:22,568 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:42:22,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:42:22,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1305568807, now seen corresponding path program 1 times [2021-11-07 22:42:22,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 22:42:22,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800722084] [2021-11-07 22:42:22,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:22,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 22:42:22,581 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 22:42:22,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019973636] [2021-11-07 22:42:22,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:22,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 22:42:22,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 22:42:22,602 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) [2021-11-07 22:42:22,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 22:42:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 22:42:22,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 22:42:22,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:42:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 22:42:22,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 22:42:22,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 22:42:22,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800722084] [2021-11-07 22:42:22,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 22:42:22,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019973636] [2021-11-07 22:42:22,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019973636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 22:42:22,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 22:42:22,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 22:42:22,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660897372] [2021-11-07 22:42:22,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 22:42:22,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 22:42:22,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 22:42:22,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 22:42:22,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 22:42:22,834 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) [2021-11-07 22:42:22,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:42:22,881 INFO L93 Difference]: Finished difference Result 386 states and 496 transitions. [2021-11-07 22:42:22,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 22:42:22,882 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 [2021-11-07 22:42:22,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:42:22,883 INFO L225 Difference]: With dead ends: 386 [2021-11-07 22:42:22,883 INFO L226 Difference]: Without dead ends: 191 [2021-11-07 22:42:22,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.69ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 22:42:22,884 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 220 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.21ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.68ms IncrementalHoareTripleChecker+Time [2021-11-07 22:42:22,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 420 Invalid, 66 Unknown, 0 Unchecked, 1.21ms Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 37.68ms Time] [2021-11-07 22:42:22,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-07 22:42:22,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 185. [2021-11-07 22:42:22,889 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) [2021-11-07 22:42:22,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 233 transitions. [2021-11-07 22:42:22,889 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 233 transitions. Word has length 62 [2021-11-07 22:42:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:42:22,890 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 233 transitions. [2021-11-07 22:42:22,890 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) [2021-11-07 22:42:22,890 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 233 transitions. [2021-11-07 22:42:22,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 22:42:22,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:42:22,891 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] [2021-11-07 22:42:22,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 22:42:23,107 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 [2021-11-07 22:42:23,107 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:42:23,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:42:23,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1777715509, now seen corresponding path program 1 times [2021-11-07 22:42:23,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 22:42:23,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748585569] [2021-11-07 22:42:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:23,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 22:42:23,118 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 22:42:23,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434703777] [2021-11-07 22:42:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:23,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 22:42:23,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 22:42:23,120 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) [2021-11-07 22:42:23,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 22:42:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 22:42:23,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 22:42:23,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:42:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 22:42:23,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 22:42:23,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 22:42:23,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748585569] [2021-11-07 22:42:23,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 22:42:23,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434703777] [2021-11-07 22:42:23,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434703777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 22:42:23,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 22:42:23,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 22:42:23,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859450807] [2021-11-07 22:42:23,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 22:42:23,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 22:42:23,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 22:42:23,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 22:42:23,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 22:42:23,440 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) [2021-11-07 22:42:23,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:42:23,493 INFO L93 Difference]: Finished difference Result 479 states and 602 transitions. [2021-11-07 22:42:23,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 22:42:23,494 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 [2021-11-07 22:42:23,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:42:23,495 INFO L225 Difference]: With dead ends: 479 [2021-11-07 22:42:23,495 INFO L226 Difference]: Without dead ends: 298 [2021-11-07 22:42:23,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.65ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 22:42:23,496 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 105 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.87ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.96ms IncrementalHoareTripleChecker+Time [2021-11-07 22:42:23,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 463 Invalid, 32 Unknown, 0 Unchecked, 0.87ms Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 46.96ms Time] [2021-11-07 22:42:23,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-07 22:42:23,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 291. [2021-11-07 22:42:23,502 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) [2021-11-07 22:42:23,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 366 transitions. [2021-11-07 22:42:23,502 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 366 transitions. Word has length 62 [2021-11-07 22:42:23,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:42:23,503 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 366 transitions. [2021-11-07 22:42:23,503 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) [2021-11-07 22:42:23,503 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 366 transitions. [2021-11-07 22:42:23,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 22:42:23,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:42:23,504 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] [2021-11-07 22:42:23,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 22:42:23,715 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 [2021-11-07 22:42:23,716 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:42:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:42:23,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1300403396, now seen corresponding path program 1 times [2021-11-07 22:42:23,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 22:42:23,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566726485] [2021-11-07 22:42:23,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:23,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 22:42:23,726 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 22:42:23,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435910168] [2021-11-07 22:42:23,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:23,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 22:42:23,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 22:42:23,728 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) [2021-11-07 22:42:23,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 22:42:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 22:42:23,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 22:42:23,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:42:23,952 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 [2021-11-07 22:42:23,963 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 [2021-11-07 22:42:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 22:42:23,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 22:42:23,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 22:42:23,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566726485] [2021-11-07 22:42:23,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 22:42:23,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435910168] [2021-11-07 22:42:23,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435910168] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 22:42:23,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 22:42:23,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 22:42:23,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888290638] [2021-11-07 22:42:23,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 22:42:23,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 22:42:23,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 22:42:23,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 22:42:23,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 22:42:23,982 INFO L87 Difference]: Start difference. First operand 291 states and 366 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:24,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:42:24,169 INFO L93 Difference]: Finished difference Result 379 states and 483 transitions. [2021-11-07 22:42:24,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 22:42:24,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 22:42:24,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:42:24,171 INFO L225 Difference]: With dead ends: 379 [2021-11-07 22:42:24,171 INFO L226 Difference]: Without dead ends: 375 [2021-11-07 22:42:24,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.55ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 22:42:24,172 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 135 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 139.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.06ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 172.15ms IncrementalHoareTripleChecker+Time [2021-11-07 22:42:24,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 564 Invalid, 137 Unknown, 0 Unchecked, 2.06ms Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 172.15ms Time] [2021-11-07 22:42:24,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-11-07 22:42:24,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 293. [2021-11-07 22:42:24,180 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) [2021-11-07 22:42:24,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 368 transitions. [2021-11-07 22:42:24,180 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 368 transitions. Word has length 69 [2021-11-07 22:42:24,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:42:24,182 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 368 transitions. [2021-11-07 22:42:24,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:24,182 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 368 transitions. [2021-11-07 22:42:24,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 22:42:24,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:42:24,185 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 22:42:24,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 22:42:24,402 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 [2021-11-07 22:42:24,402 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:42:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:42:24,403 INFO L85 PathProgramCache]: Analyzing trace with hash -2000986198, now seen corresponding path program 1 times [2021-11-07 22:42:24,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 22:42:24,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145152046] [2021-11-07 22:42:24,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:24,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 22:42:24,414 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 22:42:24,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630257366] [2021-11-07 22:42:24,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:24,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 22:42:24,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 22:42:24,416 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) [2021-11-07 22:42:24,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 22:42:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 22:42:24,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 22:42:24,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:42:24,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 22:42:24,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 22:42:24,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 22:42:24,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145152046] [2021-11-07 22:42:24,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 22:42:24,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630257366] [2021-11-07 22:42:24,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630257366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 22:42:24,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 22:42:24,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 22:42:24,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392867815] [2021-11-07 22:42:24,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 22:42:24,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 22:42:24,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 22:42:24,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 22:42:24,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 22:42:24,669 INFO L87 Difference]: Start difference. First operand 293 states and 368 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:24,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:42:24,713 INFO L93 Difference]: Finished difference Result 483 states and 627 transitions. [2021-11-07 22:42:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 22:42:24,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 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 103 [2021-11-07 22:42:24,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:42:24,714 INFO L225 Difference]: With dead ends: 483 [2021-11-07 22:42:24,715 INFO L226 Difference]: Without dead ends: 335 [2021-11-07 22:42:24,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.28ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 22:42:24,716 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 9 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.71ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.15ms IncrementalHoareTripleChecker+Time [2021-11-07 22:42:24,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 395 Invalid, 72 Unknown, 0 Unchecked, 0.71ms Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 37.15ms Time] [2021-11-07 22:42:24,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-07 22:42:24,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 333. [2021-11-07 22:42:24,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 331 states have (on average 1.2326283987915407) internal successors, (408), 332 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 408 transitions. [2021-11-07 22:42:24,727 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 408 transitions. Word has length 103 [2021-11-07 22:42:24,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:42:24,727 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 408 transitions. [2021-11-07 22:42:24,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:24,727 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 408 transitions. [2021-11-07 22:42:24,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 22:42:24,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:42:24,728 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 22:42:24,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 22:42:24,945 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 [2021-11-07 22:42:24,945 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:42:24,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:42:24,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1973776046, now seen corresponding path program 1 times [2021-11-07 22:42:24,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 22:42:24,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503847510] [2021-11-07 22:42:24,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:24,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 22:42:24,956 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 22:42:24,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117608738] [2021-11-07 22:42:24,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:24,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 22:42:24,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 22:42:24,980 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) [2021-11-07 22:42:24,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 22:42:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 22:42:25,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 22:42:25,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:42:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 22:42:25,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 22:42:25,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 22:42:25,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503847510] [2021-11-07 22:42:25,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 22:42:25,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117608738] [2021-11-07 22:42:25,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117608738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 22:42:25,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 22:42:25,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 22:42:25,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502926647] [2021-11-07 22:42:25,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 22:42:25,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 22:42:25,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 22:42:25,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 22:42:25,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 22:42:25,212 INFO L87 Difference]: Start difference. First operand 333 states and 408 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:25,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:42:25,269 INFO L93 Difference]: Finished difference Result 498 states and 622 transitions. [2021-11-07 22:42:25,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 22:42:25,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 103 [2021-11-07 22:42:25,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:42:25,271 INFO L225 Difference]: With dead ends: 498 [2021-11-07 22:42:25,271 INFO L226 Difference]: Without dead ends: 310 [2021-11-07 22:42:25,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.50ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 22:42:25,272 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 103 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.82ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.53ms IncrementalHoareTripleChecker+Time [2021-11-07 22:42:25,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 510 Invalid, 66 Unknown, 0 Unchecked, 0.82ms Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 46.53ms Time] [2021-11-07 22:42:25,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-07 22:42:25,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 305. [2021-11-07 22:42:25,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 303 states have (on average 1.2079207920792079) internal successors, (366), 304 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) [2021-11-07 22:42:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 366 transitions. [2021-11-07 22:42:25,277 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 366 transitions. Word has length 103 [2021-11-07 22:42:25,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:42:25,278 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 366 transitions. [2021-11-07 22:42:25,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:25,278 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 366 transitions. [2021-11-07 22:42:25,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 22:42:25,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:42:25,279 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 22:42:25,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 22:42:25,483 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 [2021-11-07 22:42:25,483 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:42:25,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:42:25,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1090927200, now seen corresponding path program 1 times [2021-11-07 22:42:25,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 22:42:25,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110365038] [2021-11-07 22:42:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:25,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 22:42:25,513 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 22:42:25,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378927809] [2021-11-07 22:42:25,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:25,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 22:42:25,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 22:42:25,524 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) [2021-11-07 22:42:25,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 22:42:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 22:42:25,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 22:42:25,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:42:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 22:42:25,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 22:42:25,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 22:42:25,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110365038] [2021-11-07 22:42:25,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 22:42:25,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378927809] [2021-11-07 22:42:25,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378927809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 22:42:25,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 22:42:25,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 22:42:25,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587770631] [2021-11-07 22:42:25,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 22:42:25,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 22:42:25,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 22:42:25,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 22:42:25,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 22:42:25,787 INFO L87 Difference]: Start difference. First operand 305 states and 366 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:25,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:42:25,926 INFO L93 Difference]: Finished difference Result 653 states and 790 transitions. [2021-11-07 22:42:25,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 22:42:25,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-11-07 22:42:25,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:42:25,927 INFO L225 Difference]: With dead ends: 653 [2021-11-07 22:42:25,927 INFO L226 Difference]: Without dead ends: 396 [2021-11-07 22:42:25,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.60ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 22:42:25,928 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 416 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.18ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 124.41ms IncrementalHoareTripleChecker+Time [2021-11-07 22:42:25,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 365 Invalid, 77 Unknown, 0 Unchecked, 1.18ms Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 124.41ms Time] [2021-11-07 22:42:25,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-07 22:42:25,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 389. [2021-11-07 22:42:25,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 387 states have (on average 1.2144702842377262) internal successors, (470), 388 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:25,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 470 transitions. [2021-11-07 22:42:25,940 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 470 transitions. Word has length 103 [2021-11-07 22:42:25,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:42:25,940 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 470 transitions. [2021-11-07 22:42:25,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:25,940 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 470 transitions. [2021-11-07 22:42:25,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 22:42:25,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:42:25,941 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 22:42:25,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 22:42:26,144 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 [2021-11-07 22:42:26,145 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:42:26,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:42:26,145 INFO L85 PathProgramCache]: Analyzing trace with hash 541561274, now seen corresponding path program 1 times [2021-11-07 22:42:26,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 22:42:26,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610031243] [2021-11-07 22:42:26,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:26,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 22:42:26,154 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 22:42:26,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883973222] [2021-11-07 22:42:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:26,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 22:42:26,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 22:42:26,155 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) [2021-11-07 22:42:26,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 22:42:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 22:42:26,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-07 22:42:26,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:42:26,291 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 [2021-11-07 22:42:26,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 22:42:26,325 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 22:42:26,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-07 22:42:26,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:26,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:26,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2021-11-07 22:42:26,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:26,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:26,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:26,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:26,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 57 [2021-11-07 22:42:27,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2021-11-07 22:42:27,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 54 [2021-11-07 22:42:27,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 22:42:27,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:27,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2021-11-07 22:42:27,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-11-07 22:42:27,161 INFO L354 Elim1Store]: treesize reduction 70, result has 23.1 percent of original size [2021-11-07 22:42:27,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 52 [2021-11-07 22:42:28,280 INFO L354 Elim1Store]: treesize reduction 364, result has 11.9 percent of original size [2021-11-07 22:42:28,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 2853 treesize of output 2296 [2021-11-07 22:42:28,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:28,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:28,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 22:42:32,165 INFO L354 Elim1Store]: treesize reduction 7776, result has 3.0 percent of original size [2021-11-07 22:42:32,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 3322 treesize of output 1825 [2021-11-07 22:42:32,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 22:42:32,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610031243] [2021-11-07 22:42:32,219 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 22:42:32,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883973222] [2021-11-07 22:42:32,219 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-07 22:42:32,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-07 22:42:32,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-07 22:42:32,220 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-07 22:42:32,220 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-07 22:42:32,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-07 22:42:32,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-07 22:42:32,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 22:42:32,439 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 [2021-11-07 22:42:32,442 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 22:42:32,444 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 22:42:32,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 10:42:32 BoogieIcfgContainer [2021-11-07 22:42:32,479 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 22:42:32,480 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 22:42:32,480 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 22:42:32,480 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 22:42:32,480 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 10:42:21" (3/4) ... [2021-11-07 22:42:32,482 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 22:42:32,482 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 22:42:32,483 INFO L158 Benchmark]: Toolchain (without parser) took 12766.32ms. Allocated memory was 96.5MB in the beginning and 172.0MB in the end (delta: 75.5MB). Free memory was 62.4MB in the beginning and 119.1MB in the end (delta: -56.7MB). Peak memory consumption was 18.3MB. Max. memory is 16.1GB. [2021-11-07 22:42:32,483 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 69.2MB. Free memory was 32.1MB in the beginning and 32.1MB in the end (delta: 47.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-07 22:42:32,485 INFO L158 Benchmark]: CACSL2BoogieTranslator took 493.29ms. Allocated memory is still 96.5MB. Free memory was 62.1MB in the beginning and 51.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-07 22:42:32,485 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.85ms. Allocated memory is still 96.5MB. Free memory was 51.1MB in the beginning and 44.4MB in the end (delta: 6.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-07 22:42:32,485 INFO L158 Benchmark]: Boogie Preprocessor took 63.06ms. Allocated memory is still 96.5MB. Free memory was 44.4MB in the beginning and 37.5MB in the end (delta: 6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-07 22:42:32,486 INFO L158 Benchmark]: RCFGBuilder took 860.32ms. Allocated memory was 96.5MB in the beginning and 140.5MB in the end (delta: 44.0MB). Free memory was 37.5MB in the beginning and 61.0MB in the end (delta: -23.5MB). Peak memory consumption was 25.4MB. Max. memory is 16.1GB. [2021-11-07 22:42:32,486 INFO L158 Benchmark]: TraceAbstraction took 11271.47ms. Allocated memory was 140.5MB in the beginning and 172.0MB in the end (delta: 31.5MB). Free memory was 59.9MB in the beginning and 119.1MB in the end (delta: -59.3MB). Peak memory consumption was 49.7MB. Max. memory is 16.1GB. [2021-11-07 22:42:32,488 INFO L158 Benchmark]: Witness Printer took 2.88ms. Allocated memory is still 172.0MB. Free memory is still 119.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-07 22:42:32,489 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 69.2MB. Free memory was 32.1MB in the beginning and 32.1MB in the end (delta: 47.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 493.29ms. Allocated memory is still 96.5MB. Free memory was 62.1MB in the beginning and 51.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 70.85ms. Allocated memory is still 96.5MB. Free memory was 51.1MB in the beginning and 44.4MB in the end (delta: 6.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 63.06ms. Allocated memory is still 96.5MB. Free memory was 44.4MB in the beginning and 37.5MB in the end (delta: 6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 860.32ms. Allocated memory was 96.5MB in the beginning and 140.5MB in the end (delta: 44.0MB). Free memory was 37.5MB in the beginning and 61.0MB in the end (delta: -23.5MB). Peak memory consumption was 25.4MB. Max. memory is 16.1GB. * TraceAbstraction took 11271.47ms. Allocated memory was 140.5MB in the beginning and 172.0MB in the end (delta: 31.5MB). Free memory was 59.9MB in the beginning and 119.1MB in the end (delta: -59.3MB). Peak memory consumption was 49.7MB. Max. memory is 16.1GB. * Witness Printer took 2.88ms. Allocated memory is still 172.0MB. Free memory is still 119.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 730]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint, overapproximation of bitwiseXor at line 725, overapproximation of bitwiseAnd at line 725. Possible FailurePath: [L713] int i; [L714] example_user_t *user, *tmp, *users=((void *)0); [L715] i=0 [L715] EXPR \read(i) [L715] COND TRUE i<1000 [L716] user = (example_user_t*)malloc(sizeof(example_user_t)) [L717] COND FALSE !(user == ((void *)0)) [L720] EXPR \read(i) [L720] user->id = i [L721] EXPR \read(i) [L721] EXPR \read(i) [L721] user->cookie = i*i [L722] unsigned _ha_hashv; [L722] unsigned _hj_i,_hj_j,_hj_k; [L722] unsigned const char *_hj_key=(unsigned const char*)(&((user)->id)); [L722] _ha_hashv = 0xfeedbeefu [L722] EXPR _hj_j = 0x9e3779b9u [L722] _hj_i = _hj_j = 0x9e3779b9u [L722] _hj_k = (unsigned)(sizeof(int)) [L722] COND FALSE !(_hj_k >= 12U) [L722] _ha_hashv += (unsigned)(sizeof(int)) [L722] case 11: [L722] case 10: [L722] case 9: [L722] case 8: [L722] case 7: [L722] case 6: [L722] case 5: [L722] case 4: [L722] EXPR _hj_key[3] [L722] _hj_i += ( (unsigned)_hj_key[3] << 24 ) [L722] case 3: [L722] EXPR _hj_key[2] [L722] _hj_i += ( (unsigned)_hj_key[2] << 16 ) [L722] case 2: [L722] EXPR _hj_key[1] [L722] _hj_i += ( (unsigned)_hj_key[1] << 8 ) [L722] case 1: [L722] EXPR _hj_key[0] [L722] _hj_i += _hj_key[0] [L722] _hj_i -= _hj_j [L722] _hj_i -= _ha_hashv [L722] _hj_i ^= ( _ha_hashv >> 13 ) [L722] _hj_j -= _ha_hashv [L722] _hj_j -= _hj_i [L722] _hj_j ^= ( _hj_i << 8 ) [L722] _ha_hashv -= _hj_i [L722] _ha_hashv -= _hj_j [L722] _ha_hashv ^= ( _hj_j >> 13 ) [L722] _hj_i -= _hj_j [L722] _hj_i -= _ha_hashv [L722] _hj_i ^= ( _ha_hashv >> 12 ) [L722] _hj_j -= _ha_hashv [L722] _hj_j -= _hj_i [L722] _hj_j ^= ( _hj_i << 16 ) [L722] _ha_hashv -= _hj_i [L722] _ha_hashv -= _hj_j [L722] _ha_hashv ^= ( _hj_j >> 5 ) [L722] _hj_i -= _hj_j [L722] _hj_i -= _ha_hashv [L722] _hj_i ^= ( _ha_hashv >> 3 ) [L722] _hj_j -= _ha_hashv [L722] _hj_j -= _hj_i [L722] _hj_j ^= ( _hj_i << 10 ) [L722] _ha_hashv -= _hj_i [L722] _ha_hashv -= _hj_j [L722] _ha_hashv ^= ( _hj_j >> 15 ) [L722] (user)->hh.hashv = (_ha_hashv) [L722] (user)->hh.key = (char*) (&((user)->id)) [L722] (user)->hh.keylen = (unsigned) (sizeof(int)) [L722] COND TRUE !(users) [L722] (user)->hh.next = ((void *)0) [L722] (user)->hh.prev = ((void *)0) [L722] (user)->hh.tbl = (UT_hash_table*)malloc(sizeof(UT_hash_table)) [L722] EXPR (user)->hh.tbl [L722] COND FALSE !(!(user)->hh.tbl) [L722] (user)->hh.tbl [L722] EXPR (user)->hh.tbl [L722] (user)->hh.tbl->tail = &((user)->hh) [L722] EXPR (user)->hh.tbl [L722] (user)->hh.tbl->num_buckets = 32U [L722] EXPR (user)->hh.tbl [L722] (user)->hh.tbl->log2_num_buckets = 5U [L722] EXPR (user)->hh.tbl [L722] (user)->hh.tbl->hho = (char*)(&(user)->hh) - (char*)(user) [L722] EXPR (user)->hh.tbl [L722] (user)->hh.tbl->buckets = (UT_hash_bucket*)malloc(32U * sizeof(struct UT_hash_bucket)) [L722] EXPR (user)->hh.tbl [L722] (user)->hh.tbl->signature = 0xa0111fe1u [L722] EXPR (user)->hh.tbl [L722] EXPR (user)->hh.tbl->buckets [L722] COND FALSE !(!(user)->hh.tbl->buckets) [L722] EXPR (user)->hh.tbl [L722] (user)->hh.tbl->buckets [L722] (users) = (user) [L722] unsigned _ha_bkt; [L722] EXPR (users)->hh.tbl [L722] EXPR (users)->hh.tbl->num_items [L722] (users)->hh.tbl->num_items++ [L722] EXPR (users)->hh.tbl [L722] EXPR (users)->hh.tbl->num_buckets [L722] _ha_bkt = ((_ha_hashv) & (((users)->hh.tbl->num_buckets) - 1U)) [L722] EXPR (users)->hh.tbl [L722] EXPR (users)->hh.tbl->buckets [L722] UT_hash_bucket *_ha_head = &((users)->hh.tbl->buckets[_ha_bkt]); [L722] EXPR _ha_head->count [L722] _ha_head->count++ [L722] EXPR _ha_head->hh_head [L722] (&(user)->hh)->hh_next = _ha_head->hh_head [L722] (&(user)->hh)->hh_prev = ((void *)0) [L722] EXPR _ha_head->hh_head [L722] COND FALSE !(_ha_head->hh_head != ((void *)0)) [L722] _ha_head->hh_head = (&(user)->hh) [L722] EXPR _ha_head->count [L722] EXPR _ha_head->expand_mult [L722] (_ha_head->count >= ((_ha_head->expand_mult + 1U) * 10U)) && !(&(user)->hh)->tbl->noexpand [L722] EXPR (&(user)->hh)->tbl [L722] EXPR (&(user)->hh)->tbl->noexpand [L722] (_ha_head->count >= ((_ha_head->expand_mult + 1U) * 10U)) && !(&(user)->hh)->tbl->noexpand [L722] COND FALSE !((_ha_head->count >= ((_ha_head->expand_mult + 1U) * 10U)) && !(&(user)->hh)->tbl->noexpand) [L715] EXPR \read(i) [L715] i++ [L715] EXPR \read(i) [L715] COND FALSE !(i<1000) [L724] i=0 [L724] EXPR \read(i) [L724] COND TRUE i<1000 [L725] unsigned _hf_hashv; [L725] unsigned _hj_i,_hj_j,_hj_k; [L725] unsigned const char *_hj_key=(unsigned const char*)(&i); [L725] _hf_hashv = 0xfeedbeefu [L725] EXPR _hj_j = 0x9e3779b9u [L725] _hj_i = _hj_j = 0x9e3779b9u [L725] _hj_k = (unsigned)(sizeof(int)) [L725] COND FALSE !(_hj_k >= 12U) [L725] _hf_hashv += (unsigned)(sizeof(int)) [L725] case 11: [L725] case 10: [L725] case 9: [L725] case 8: [L725] case 7: [L725] case 6: [L725] case 5: [L725] case 4: [L725] EXPR _hj_key[3] [L725] _hj_i += ( (unsigned)_hj_key[3] << 24 ) [L725] case 3: [L725] EXPR _hj_key[2] [L725] _hj_i += ( (unsigned)_hj_key[2] << 16 ) [L725] case 2: [L725] EXPR _hj_key[1] [L725] _hj_i += ( (unsigned)_hj_key[1] << 8 ) [L725] case 1: [L725] EXPR _hj_key[0] [L725] _hj_i += _hj_key[0] [L725] _hj_i -= _hj_j [L725] _hj_i -= _hf_hashv [L725] _hj_i ^= ( _hf_hashv >> 13 ) [L725] _hj_j -= _hf_hashv [L725] _hj_j -= _hj_i [L725] _hj_j ^= ( _hj_i << 8 ) [L725] _hf_hashv -= _hj_i [L725] _hf_hashv -= _hj_j [L725] _hf_hashv ^= ( _hj_j >> 13 ) [L725] _hj_i -= _hj_j [L725] _hj_i -= _hf_hashv [L725] _hj_i ^= ( _hf_hashv >> 12 ) [L725] _hj_j -= _hf_hashv [L725] _hj_j -= _hj_i [L725] _hj_j ^= ( _hj_i << 16 ) [L725] _hf_hashv -= _hj_i [L725] _hf_hashv -= _hj_j [L725] _hf_hashv ^= ( _hj_j >> 5 ) [L725] _hj_i -= _hj_j [L725] _hj_i -= _hf_hashv [L725] _hj_i ^= ( _hf_hashv >> 3 ) [L725] _hj_j -= _hf_hashv [L725] _hj_j -= _hj_i [L725] _hj_j ^= ( _hj_i << 10 ) [L725] _hf_hashv -= _hj_i [L725] _hf_hashv -= _hj_j [L725] _hf_hashv ^= ( _hj_j >> 15 ) [L725] (tmp) = ((void *)0) [L725] COND TRUE \read(*users) [L725] unsigned _hf_bkt; [L725] EXPR (users)->hh.tbl [L725] EXPR (users)->hh.tbl->num_buckets [L725] _hf_bkt = ((_hf_hashv) & (((users)->hh.tbl->num_buckets) - 1U)) [L725] EXPR (users)->hh.tbl [L725] EXPR (users)->hh.tbl->buckets [L725] EXPR ((users)->hh.tbl->buckets[ _hf_bkt ]).hh_head [L725] COND FALSE !(((users)->hh.tbl->buckets[ _hf_bkt ]).hh_head != ((void *)0)) [L725] (tmp) = ((void *)0) [L725] COND FALSE !((tmp) != ((void *)0)) [L726] COND FALSE !(tmp != ((void *)0)) [L730] reach_error() - UnprovableResult [Line: 734]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 182 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 11187.74ms, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 23.27ms, AutomataDifference: 1025.04ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 11.94ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1143 SdHoareTripleChecker+Valid, 793.65ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1143 mSDsluCounter, 3926 SdHoareTripleChecker+Invalid, 652.39ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1958 mSDsCounter, 119 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 561 IncrementalHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 119 mSolverCounterUnsat, 1968 mSDtfsCounter, 561 mSolverCounterSat, 17.50ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 569 GetRequests, 551 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.88ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=389occurred in iteration=9, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 118.28ms AutomataMinimizationTime, 9 MinimizatonAttempts, 226 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 334.13ms SsaConstructionTime, 345.85ms SatisfiabilityAnalysisTime, 6983.88ms InterpolantComputationTime, 692 NumberOfCodeBlocks, 692 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 573 ConstructedInterpolants, 0 QuantifiedInterpolants, 1106 SizeOfPredicates, 6 NumberOfNonLiveVariables, 2243 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 14/14 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-07 22:42:32,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 67499ec0709cfdcc368630c5b1d94f26157589b8bf16f22cf5d62554760c6dd7 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5b36d44 [2021-11-07 22:42:34,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 22:42:34,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 22:42:34,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 22:42:34,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 22:42:34,178 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 22:42:34,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 22:42:34,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 22:42:34,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 22:42:34,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 22:42:34,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 22:42:34,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 22:42:34,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 22:42:34,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 22:42:34,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 22:42:34,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 22:42:34,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 22:42:34,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 22:42:34,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 22:42:34,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 22:42:34,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 22:42:34,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 22:42:34,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 22:42:34,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 22:42:34,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 22:42:34,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 22:42:34,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 22:42:34,212 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 22:42:34,213 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 22:42:34,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 22:42:34,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 22:42:34,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 22:42:34,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 22:42:34,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 22:42:34,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 22:42:34,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 22:42:34,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 22:42:34,217 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 22:42:34,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 22:42:34,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 22:42:34,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 22:42:34,222 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-07 22:42:34,248 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 22:42:34,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 22:42:34,249 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 22:42:34,250 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 22:42:34,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 22:42:34,251 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 22:42:34,251 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 22:42:34,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 22:42:34,252 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 22:42:34,252 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 22:42:34,252 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 22:42:34,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 22:42:34,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 22:42:34,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 22:42:34,253 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 22:42:34,253 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 22:42:34,253 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 22:42:34,253 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 22:42:34,253 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 22:42:34,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 22:42:34,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 22:42:34,254 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 22:42:34,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 22:42:34,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 22:42:34,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 22:42:34,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 22:42:34,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 22:42:34,255 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-07 22:42:34,255 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 22:42:34,255 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 22:42:34,255 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 22:42:34,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 22:42:34,255 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 22:42:34,256 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 22:42:34,256 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67499ec0709cfdcc368630c5b1d94f26157589b8bf16f22cf5d62554760c6dd7 [2021-11-07 22:42:34,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 22:42:34,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 22:42:34,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 22:42:34,491 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 22:42:34,492 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 22:42:34,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i [2021-11-07 22:42:34,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc0917c0a/ed625987a79f4aa7bec1aaf8b92c3d76/FLAG830100784 [2021-11-07 22:42:35,047 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 22:42:35,048 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-1.i [2021-11-07 22:42:35,073 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc0917c0a/ed625987a79f4aa7bec1aaf8b92c3d76/FLAG830100784 [2021-11-07 22:42:35,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc0917c0a/ed625987a79f4aa7bec1aaf8b92c3d76 [2021-11-07 22:42:35,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 22:42:35,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 22:42:35,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 22:42:35,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 22:42:35,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 22:42:35,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 10:42:35" (1/1) ... [2021-11-07 22:42:35,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3456e4a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:35, skipping insertion in model container [2021-11-07 22:42:35,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 10:42:35" (1/1) ... [2021-11-07 22:42:35,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 22:42:35,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 22:42:35,895 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_SAX_test7-1.i[33021,33034] [2021-11-07 22:42:35,991 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_SAX_test7-1.i[44124,44137] [2021-11-07 22:42:35,992 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_SAX_test7-1.i[44245,44258] [2021-11-07 22:42:35,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 22:42:36,009 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 22:42:36,030 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_SAX_test7-1.i[33021,33034] [2021-11-07 22:42:36,079 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_SAX_test7-1.i[44124,44137] [2021-11-07 22:42:36,081 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_SAX_test7-1.i[44245,44258] [2021-11-07 22:42:36,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 22:42:36,114 INFO L208 MainTranslator]: Completed translation [2021-11-07 22:42:36,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:36 WrapperNode [2021-11-07 22:42:36,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 22:42:36,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 22:42:36,116 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 22:42:36,116 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 22:42:36,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:36" (1/1) ... [2021-11-07 22:42:36,151 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:36" (1/1) ... [2021-11-07 22:42:36,200 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 22:42:36,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 22:42:36,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 22:42:36,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 22:42:36,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:36" (1/1) ... [2021-11-07 22:42:36,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:36" (1/1) ... [2021-11-07 22:42:36,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:36" (1/1) ... [2021-11-07 22:42:36,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:36" (1/1) ... [2021-11-07 22:42:36,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:36" (1/1) ... [2021-11-07 22:42:36,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:36" (1/1) ... [2021-11-07 22:42:36,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:36" (1/1) ... [2021-11-07 22:42:36,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 22:42:36,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 22:42:36,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 22:42:36,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 22:42:36,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:36" (1/1) ... [2021-11-07 22:42:36,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 22:42:36,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 22:42:36,337 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) [2021-11-07 22:42:36,358 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 [2021-11-07 22:42:36,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 22:42:36,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 22:42:36,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 22:42:36,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 22:42:36,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 22:42:36,373 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 22:42:36,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 22:42:36,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 22:42:36,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 22:42:36,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 22:42:36,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 22:42:36,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 22:42:39,248 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 22:42:39,248 INFO L299 CfgBuilder]: Removed 73 assume(true) statements. [2021-11-07 22:42:39,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 10:42:39 BoogieIcfgContainer [2021-11-07 22:42:39,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 22:42:39,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 22:42:39,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 22:42:39,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 22:42:39,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 10:42:35" (1/3) ... [2021-11-07 22:42:39,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766351a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 10:42:39, skipping insertion in model container [2021-11-07 22:42:39,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:42:36" (2/3) ... [2021-11-07 22:42:39,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766351a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 10:42:39, skipping insertion in model container [2021-11-07 22:42:39,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 10:42:39" (3/3) ... [2021-11-07 22:42:39,255 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test7-1.i [2021-11-07 22:42:39,259 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 22:42:39,259 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 22:42:39,289 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 22:42:39,294 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 [2021-11-07 22:42:39,294 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 22:42:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand has 182 states, 179 states have (on average 1.7094972067039107) internal successors, (306), 181 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:39,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 22:42:39,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:42:39,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 22:42:39,311 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:42:39,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:42:39,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1366407864, now seen corresponding path program 1 times [2021-11-07 22:42:39,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 22:42:39,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155398372] [2021-11-07 22:42:39,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:39,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 22:42:39,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 22:42:39,325 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 22:42:39,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 22:42:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 22:42:39,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 22:42:39,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:42:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 22:42:39,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 22:42:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 22:42:39,589 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 22:42:39,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155398372] [2021-11-07 22:42:39,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155398372] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 22:42:39,590 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 22:42:39,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 22:42:39,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638607503] [2021-11-07 22:42:39,592 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 22:42:39,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 22:42:39,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 22:42:39,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 22:42:39,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 22:42:39,614 INFO L87 Difference]: Start difference. First operand has 182 states, 179 states have (on average 1.7094972067039107) internal successors, (306), 181 states have internal predecessors, (306), 0 states have call successors, (0), 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) [2021-11-07 22:42:39,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:42:39,647 INFO L93 Difference]: Finished difference Result 361 states and 609 transitions. [2021-11-07 22:42:39,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 22:42:39,649 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 [2021-11-07 22:42:39,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:42:39,659 INFO L225 Difference]: With dead ends: 361 [2021-11-07 22:42:39,660 INFO L226 Difference]: Without dead ends: 177 [2021-11-07 22:42:39,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.09ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 22:42:39,668 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.64ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-07 22:42:39,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 1.64ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-07 22:42:39,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-07 22:42:39,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-11-07 22:42:39,711 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) [2021-11-07 22:42:39,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 232 transitions. [2021-11-07 22:42:39,720 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 232 transitions. Word has length 8 [2021-11-07 22:42:39,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:42:39,720 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 232 transitions. [2021-11-07 22:42:39,720 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) [2021-11-07 22:42:39,721 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 232 transitions. [2021-11-07 22:42:39,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 22:42:39,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:42:39,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 22:42:39,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 22:42:39,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 22:42:39,932 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:42:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:42:39,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1136278917, now seen corresponding path program 1 times [2021-11-07 22:42:39,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 22:42:39,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832983891] [2021-11-07 22:42:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:39,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 22:42:39,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 22:42:39,934 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 22:42:39,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 22:42:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 22:42:40,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 22:42:40,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:42:40,119 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 [2021-11-07 22:42:40,144 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 [2021-11-07 22:42:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 22:42:40,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 22:42:40,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 22:42:40,210 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 22:42:40,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832983891] [2021-11-07 22:42:40,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832983891] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 22:42:40,210 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 22:42:40,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 22:42:40,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298645269] [2021-11-07 22:42:40,211 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 22:42:40,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 22:42:40,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 22:42:40,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 22:42:40,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 22:42:40,213 INFO L87 Difference]: Start difference. First operand 177 states and 232 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:43,030 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 22:42:44,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:42:44,053 INFO L93 Difference]: Finished difference Result 468 states and 614 transitions. [2021-11-07 22:42:44,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 22:42:44,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 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 [2021-11-07 22:42:44,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:42:44,056 INFO L225 Difference]: With dead ends: 468 [2021-11-07 22:42:44,056 INFO L226 Difference]: Without dead ends: 381 [2021-11-07 22:42:44,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.77ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 22:42:44,057 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 396 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3528.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.52ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3778.88ms IncrementalHoareTripleChecker+Time [2021-11-07 22:42:44,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 858 Invalid, 253 Unknown, 0 Unchecked, 9.52ms Time], IncrementalHoareTripleChecker [8 Valid, 244 Invalid, 1 Unknown, 0 Unchecked, 3778.88ms Time] [2021-11-07 22:42:44,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-11-07 22:42:44,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 179. [2021-11-07 22:42:44,065 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) [2021-11-07 22:42:44,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 234 transitions. [2021-11-07 22:42:44,066 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 234 transitions. Word has length 10 [2021-11-07 22:42:44,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:42:44,066 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 234 transitions. [2021-11-07 22:42:44,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:44,067 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 234 transitions. [2021-11-07 22:42:44,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 22:42:44,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:42:44,068 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] [2021-11-07 22:42:44,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 22:42:44,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 22:42:44,282 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:42:44,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:42:44,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2095912151, now seen corresponding path program 1 times [2021-11-07 22:42:44,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 22:42:44,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722396580] [2021-11-07 22:42:44,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:44,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 22:42:44,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 22:42:44,285 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 22:42:44,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 22:42:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 22:42:44,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 22:42:44,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:42:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 22:42:44,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 22:42:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 22:42:44,748 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 22:42:44,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722396580] [2021-11-07 22:42:44,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722396580] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 22:42:44,748 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 22:42:44,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 22:42:44,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079522408] [2021-11-07 22:42:44,749 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 22:42:44,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 22:42:44,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 22:42:44,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 22:42:44,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 22:42:44,750 INFO L87 Difference]: Start difference. First operand 179 states and 234 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:44,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:42:44,847 INFO L93 Difference]: Finished difference Result 363 states and 476 transitions. [2021-11-07 22:42:44,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 22:42:44,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 [2021-11-07 22:42:44,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:42:44,850 INFO L225 Difference]: With dead ends: 363 [2021-11-07 22:42:44,851 INFO L226 Difference]: Without dead ends: 188 [2021-11-07 22:42:44,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.75ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 22:42:44,852 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 427 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.65ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.25ms IncrementalHoareTripleChecker+Time [2021-11-07 22:42:44,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 416 Invalid, 75 Unknown, 0 Unchecked, 1.65ms Time], IncrementalHoareTripleChecker [37 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 81.25ms Time] [2021-11-07 22:42:44,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-07 22:42:44,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 182. [2021-11-07 22:42:44,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 180 states have (on average 1.2722222222222221) internal successors, (229), 181 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:44,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 229 transitions. [2021-11-07 22:42:44,862 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 229 transitions. Word has length 62 [2021-11-07 22:42:44,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:42:44,862 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 229 transitions. [2021-11-07 22:42:44,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:44,862 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 229 transitions. [2021-11-07 22:42:44,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 22:42:44,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:42:44,864 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] [2021-11-07 22:42:44,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 22:42:45,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 22:42:45,077 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:42:45,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:42:45,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1777715509, now seen corresponding path program 1 times [2021-11-07 22:42:45,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 22:42:45,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420329332] [2021-11-07 22:42:45,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:45,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 22:42:45,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 22:42:45,079 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 22:42:45,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 22:42:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 22:42:45,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 22:42:45,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:42:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 22:42:45,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 22:42:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 22:42:45,827 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 22:42:45,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420329332] [2021-11-07 22:42:45,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420329332] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 22:42:45,828 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 22:42:45,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 22:42:45,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778981647] [2021-11-07 22:42:45,828 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 22:42:45,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 22:42:45,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 22:42:45,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 22:42:45,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 22:42:45,829 INFO L87 Difference]: Start difference. First operand 182 states and 229 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) [2021-11-07 22:42:46,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:42:46,842 INFO L93 Difference]: Finished difference Result 470 states and 590 transitions. [2021-11-07 22:42:46,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 22:42:46,842 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 [2021-11-07 22:42:46,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:42:46,843 INFO L225 Difference]: With dead ends: 470 [2021-11-07 22:42:46,843 INFO L226 Difference]: Without dead ends: 292 [2021-11-07 22:42:46,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.97ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 22:42:46,845 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 101 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 966.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.17ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1001.27ms IncrementalHoareTripleChecker+Time [2021-11-07 22:42:46,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 451 Invalid, 36 Unknown, 0 Unchecked, 1.17ms Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 1001.27ms Time] [2021-11-07 22:42:46,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-07 22:42:46,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 285. [2021-11-07 22:42:46,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 283 states have (on average 1.265017667844523) internal successors, (358), 284 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:46,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 358 transitions. [2021-11-07 22:42:46,860 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 358 transitions. Word has length 62 [2021-11-07 22:42:46,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:42:46,860 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 358 transitions. [2021-11-07 22:42:46,860 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) [2021-11-07 22:42:46,860 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 358 transitions. [2021-11-07 22:42:46,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 22:42:46,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:42:46,863 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] [2021-11-07 22:42:46,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 22:42:47,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 22:42:47,068 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:42:47,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:42:47,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1300403396, now seen corresponding path program 1 times [2021-11-07 22:42:47,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 22:42:47,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051558691] [2021-11-07 22:42:47,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:47,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 22:42:47,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 22:42:47,074 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 22:42:47,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 22:42:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 22:42:47,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 22:42:47,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:42:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 22:42:47,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 22:42:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 22:42:47,477 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 22:42:47,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051558691] [2021-11-07 22:42:47,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051558691] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 22:42:47,477 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 22:42:47,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 22:42:47,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828004517] [2021-11-07 22:42:47,477 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 22:42:47,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 22:42:47,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 22:42:47,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 22:42:47,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 22:42:47,479 INFO L87 Difference]: Start difference. First operand 285 states and 358 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:47,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:42:47,546 INFO L93 Difference]: Finished difference Result 528 states and 673 transitions. [2021-11-07 22:42:47,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 22:42:47,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2021-11-07 22:42:47,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:42:47,548 INFO L225 Difference]: With dead ends: 528 [2021-11-07 22:42:47,548 INFO L226 Difference]: Without dead ends: 288 [2021-11-07 22:42:47,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.68ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 22:42:47,549 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 0 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.93ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.13ms IncrementalHoareTripleChecker+Time [2021-11-07 22:42:47,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 643 Invalid, 20 Unknown, 0 Unchecked, 0.93ms Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 59.13ms Time] [2021-11-07 22:42:47,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-07 22:42:47,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2021-11-07 22:42:47,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 286 states have (on average 1.2622377622377623) internal successors, (361), 287 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:47,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 361 transitions. [2021-11-07 22:42:47,562 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 361 transitions. Word has length 69 [2021-11-07 22:42:47,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:42:47,564 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 361 transitions. [2021-11-07 22:42:47,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:47,564 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 361 transitions. [2021-11-07 22:42:47,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 22:42:47,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:42:47,568 INFO L514 BasicCegarLoop]: trace histogram [2, 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] [2021-11-07 22:42:47,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 22:42:47,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 22:42:47,783 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:42:47,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:42:47,784 INFO L85 PathProgramCache]: Analyzing trace with hash 982130832, now seen corresponding path program 1 times [2021-11-07 22:42:47,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 22:42:47,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543354187] [2021-11-07 22:42:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:47,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 22:42:47,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 22:42:47,785 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 22:42:47,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 22:42:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 22:42:47,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 22:42:47,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:42:48,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 22:42:48,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 22:42:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 22:42:48,242 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 22:42:48,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543354187] [2021-11-07 22:42:48,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543354187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 22:42:48,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 22:42:48,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-07 22:42:48,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288319371] [2021-11-07 22:42:48,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 22:42:48,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 22:42:48,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 22:42:48,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 22:42:48,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 22:42:48,243 INFO L87 Difference]: Start difference. First operand 288 states and 361 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:48,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:42:48,506 INFO L93 Difference]: Finished difference Result 537 states and 685 transitions. [2021-11-07 22:42:48,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 22:42:48,507 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 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 72 [2021-11-07 22:42:48,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:42:48,508 INFO L225 Difference]: With dead ends: 537 [2021-11-07 22:42:48,508 INFO L226 Difference]: Without dead ends: 294 [2021-11-07 22:42:48,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 145.80ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-07 22:42:48,509 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 0 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 146.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.49ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 168.12ms IncrementalHoareTripleChecker+Time [2021-11-07 22:42:48,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1067 Invalid, 57 Unknown, 0 Unchecked, 1.49ms Time], IncrementalHoareTripleChecker [13 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 168.12ms Time] [2021-11-07 22:42:48,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-07 22:42:48,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2021-11-07 22:42:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 292 states have (on average 1.2568493150684932) internal successors, (367), 293 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 367 transitions. [2021-11-07 22:42:48,515 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 367 transitions. Word has length 72 [2021-11-07 22:42:48,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:42:48,516 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 367 transitions. [2021-11-07 22:42:48,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:48,516 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 367 transitions. [2021-11-07 22:42:48,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 22:42:48,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:42:48,517 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 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] [2021-11-07 22:42:48,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 22:42:48,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 22:42:48,728 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:42:48,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:42:48,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2058438736, now seen corresponding path program 2 times [2021-11-07 22:42:48,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 22:42:48,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345422638] [2021-11-07 22:42:48,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 22:42:48,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 22:42:48,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 22:42:48,730 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 22:42:48,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 22:42:48,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 22:42:48,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 22:42:48,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 22:42:48,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:42:48,903 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 [2021-11-07 22:42:48,914 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 [2021-11-07 22:42:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 22:42:48,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 22:42:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 22:42:49,031 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 22:42:49,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345422638] [2021-11-07 22:42:49,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345422638] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 22:42:49,031 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 22:42:49,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 22:42:49,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151146006] [2021-11-07 22:42:49,032 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 22:42:49,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 22:42:49,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 22:42:49,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 22:42:49,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 22:42:49,033 INFO L87 Difference]: Start difference. First operand 294 states and 367 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:42:51,134 INFO L93 Difference]: Finished difference Result 448 states and 571 transitions. [2021-11-07 22:42:51,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 22:42:51,135 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 78 [2021-11-07 22:42:51,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:42:51,137 INFO L225 Difference]: With dead ends: 448 [2021-11-07 22:42:51,137 INFO L226 Difference]: Without dead ends: 444 [2021-11-07 22:42:51,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.47ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 22:42:51,137 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 338 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1866.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.35ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2050.68ms IncrementalHoareTripleChecker+Time [2021-11-07 22:42:51,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 823 Invalid, 218 Unknown, 0 Unchecked, 8.35ms Time], IncrementalHoareTripleChecker [9 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 2050.68ms Time] [2021-11-07 22:42:51,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-07 22:42:51,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 365. [2021-11-07 22:42:51,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 363 states have (on average 1.2754820936639117) internal successors, (463), 364 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:51,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 463 transitions. [2021-11-07 22:42:51,146 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 463 transitions. Word has length 78 [2021-11-07 22:42:51,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:42:51,147 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 463 transitions. [2021-11-07 22:42:51,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:51,147 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 463 transitions. [2021-11-07 22:42:51,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 22:42:51,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:42:51,148 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 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] [2021-11-07 22:42:51,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 22:42:51,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 22:42:51,358 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:42:51,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:42:51,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1224331210, now seen corresponding path program 1 times [2021-11-07 22:42:51,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 22:42:51,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272767444] [2021-11-07 22:42:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:51,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 22:42:51,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 22:42:51,360 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 22:42:51,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 22:42:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 22:42:51,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 22:42:51,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:42:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 22:42:51,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 22:42:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 22:42:52,233 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 22:42:52,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272767444] [2021-11-07 22:42:52,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272767444] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 22:42:52,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 22:42:52,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-07 22:42:52,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244755195] [2021-11-07 22:42:52,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 22:42:52,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 22:42:52,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 22:42:52,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 22:42:52,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-07 22:42:52,235 INFO L87 Difference]: Start difference. First operand 365 states and 463 transitions. Second operand has 16 states, 16 states have (on average 7.375) internal successors, (118), 16 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:53,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:42:53,714 INFO L93 Difference]: Finished difference Result 697 states and 901 transitions. [2021-11-07 22:42:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 22:42:53,715 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.375) internal successors, (118), 16 states have internal predecessors, (118), 0 states have call successors, (0), 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 112 [2021-11-07 22:42:53,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:42:53,717 INFO L225 Difference]: With dead ends: 697 [2021-11-07 22:42:53,717 INFO L226 Difference]: Without dead ends: 377 [2021-11-07 22:42:53,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 857.61ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-07 22:42:53,718 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 0 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 846.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1915 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.84ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 898.82ms IncrementalHoareTripleChecker+Time [2021-11-07 22:42:53,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1915 Invalid, 164 Unknown, 0 Unchecked, 2.84ms Time], IncrementalHoareTripleChecker [45 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 898.82ms Time] [2021-11-07 22:42:53,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-07 22:42:53,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-11-07 22:42:53,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 375 states have (on average 1.2666666666666666) internal successors, (475), 376 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 475 transitions. [2021-11-07 22:42:53,730 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 475 transitions. Word has length 112 [2021-11-07 22:42:53,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:42:53,743 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 475 transitions. [2021-11-07 22:42:53,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.375) internal successors, (118), 16 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:53,744 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 475 transitions. [2021-11-07 22:42:53,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-07 22:42:53,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:42:53,745 INFO L514 BasicCegarLoop]: trace histogram [14, 7, 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] [2021-11-07 22:42:53,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 22:42:53,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 22:42:53,956 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:42:53,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:42:53,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2016870474, now seen corresponding path program 2 times [2021-11-07 22:42:53,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 22:42:53,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108862670] [2021-11-07 22:42:53,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 22:42:53,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 22:42:53,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 22:42:53,959 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 22:42:53,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 22:42:54,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 22:42:54,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 22:42:54,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 22:42:54,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:42:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-07 22:42:54,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 22:42:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-07 22:42:54,369 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 22:42:54,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108862670] [2021-11-07 22:42:54,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108862670] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 22:42:54,370 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 22:42:54,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 22:42:54,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878115057] [2021-11-07 22:42:54,370 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 22:42:54,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 22:42:54,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 22:42:54,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 22:42:54,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 22:42:54,371 INFO L87 Difference]: Start difference. First operand 377 states and 475 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:54,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:42:54,455 INFO L93 Difference]: Finished difference Result 603 states and 784 transitions. [2021-11-07 22:42:54,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 22:42:54,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 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 124 [2021-11-07 22:42:54,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:42:54,457 INFO L225 Difference]: With dead ends: 603 [2021-11-07 22:42:54,457 INFO L226 Difference]: Without dead ends: 389 [2021-11-07 22:42:54,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.82ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 22:42:54,458 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 101 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.92ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.73ms IncrementalHoareTripleChecker+Time [2021-11-07 22:42:54,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 604 Invalid, 68 Unknown, 0 Unchecked, 0.92ms Time], IncrementalHoareTripleChecker [30 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 67.73ms Time] [2021-11-07 22:42:54,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-07 22:42:54,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 386. [2021-11-07 22:42:54,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 384 states have (on average 1.1979166666666667) internal successors, (460), 385 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:54,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 460 transitions. [2021-11-07 22:42:54,466 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 460 transitions. Word has length 124 [2021-11-07 22:42:54,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:42:54,466 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 460 transitions. [2021-11-07 22:42:54,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:42:54,467 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 460 transitions. [2021-11-07 22:42:54,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-07 22:42:54,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:42:54,469 INFO L514 BasicCegarLoop]: trace histogram [14, 7, 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] [2021-11-07 22:42:54,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 22:42:54,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 22:42:54,677 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:42:54,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:42:54,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1333208362, now seen corresponding path program 1 times [2021-11-07 22:42:54,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 22:42:54,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735747513] [2021-11-07 22:42:54,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:42:54,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 22:42:54,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 22:42:54,680 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 22:42:54,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 22:42:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 22:42:54,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 22:42:54,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:42:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 2 proven. 105 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 22:42:55,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 22:42:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 2 proven. 105 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 22:42:56,318 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 22:42:56,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735747513] [2021-11-07 22:42:56,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735747513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 22:42:56,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 22:42:56,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-11-07 22:42:56,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712706715] [2021-11-07 22:42:56,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 22:42:56,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 22:42:56,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 22:42:56,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 22:42:56,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-11-07 22:42:56,320 INFO L87 Difference]: Start difference. First operand 386 states and 460 transitions. Second operand has 32 states, 32 states have (on average 4.1875) internal successors, (134), 32 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:43:05,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:43:05,165 INFO L93 Difference]: Finished difference Result 751 states and 919 transitions. [2021-11-07 22:43:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 22:43:05,176 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.1875) internal successors, (134), 32 states have internal predecessors, (134), 0 states have call successors, (0), 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 124 [2021-11-07 22:43:05,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:43:05,177 INFO L225 Difference]: With dead ends: 751 [2021-11-07 22:43:05,177 INFO L226 Difference]: Without dead ends: 410 [2021-11-07 22:43:05,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 3749.40ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 22:43:05,179 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 0 mSDsluCounter, 3015 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5835.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3223 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.52ms SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6012.13ms IncrementalHoareTripleChecker+Time [2021-11-07 22:43:05,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 3223 Invalid, 520 Unknown, 0 Unchecked, 5.52ms Time], IncrementalHoareTripleChecker [157 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 6012.13ms Time] [2021-11-07 22:43:05,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-07 22:43:05,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2021-11-07 22:43:05,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 408 states have (on average 1.1862745098039216) internal successors, (484), 409 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:43:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 484 transitions. [2021-11-07 22:43:05,191 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 484 transitions. Word has length 124 [2021-11-07 22:43:05,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:43:05,191 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 484 transitions. [2021-11-07 22:43:05,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.1875) internal successors, (134), 32 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:43:05,192 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 484 transitions. [2021-11-07 22:43:05,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-07 22:43:05,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:43:05,193 INFO L514 BasicCegarLoop]: trace histogram [30, 15, 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] [2021-11-07 22:43:05,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 22:43:05,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 22:43:05,404 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:43:05,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:43:05,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2039593942, now seen corresponding path program 2 times [2021-11-07 22:43:05,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 22:43:05,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261239464] [2021-11-07 22:43:05,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 22:43:05,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 22:43:05,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 22:43:05,406 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 22:43:05,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 22:43:05,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 22:43:05,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 22:43:05,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 22:43:05,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:43:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2021-11-07 22:43:05,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 22:43:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2021-11-07 22:43:05,874 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 22:43:05,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261239464] [2021-11-07 22:43:05,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261239464] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 22:43:05,874 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 22:43:05,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 5] imperfect sequences [] total 5 [2021-11-07 22:43:05,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360354656] [2021-11-07 22:43:05,874 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 22:43:05,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 22:43:05,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 22:43:05,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 22:43:05,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 22:43:05,876 INFO L87 Difference]: Start difference. First operand 410 states and 484 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:43:05,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:43:05,935 INFO L93 Difference]: Finished difference Result 611 states and 731 transitions. [2021-11-07 22:43:05,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 22:43:05,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 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 148 [2021-11-07 22:43:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:43:05,937 INFO L225 Difference]: With dead ends: 611 [2021-11-07 22:43:05,937 INFO L226 Difference]: Without dead ends: 413 [2021-11-07 22:43:05,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.44ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 22:43:05,938 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 5 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.49ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.57ms IncrementalHoareTripleChecker+Time [2021-11-07 22:43:05,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 384 Invalid, 40 Unknown, 0 Unchecked, 0.49ms Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 42.57ms Time] [2021-11-07 22:43:05,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-07 22:43:05,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 410. [2021-11-07 22:43:05,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 408 states have (on average 1.1642156862745099) internal successors, (475), 409 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:43:05,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 475 transitions. [2021-11-07 22:43:05,948 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 475 transitions. Word has length 148 [2021-11-07 22:43:05,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:43:05,948 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 475 transitions. [2021-11-07 22:43:05,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:43:05,949 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 475 transitions. [2021-11-07 22:43:05,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-07 22:43:05,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:43:05,950 INFO L514 BasicCegarLoop]: trace histogram [30, 15, 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] [2021-11-07 22:43:05,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 22:43:06,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 22:43:06,170 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:43:06,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:43:06,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1997207916, now seen corresponding path program 1 times [2021-11-07 22:43:06,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 22:43:06,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069815313] [2021-11-07 22:43:06,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:43:06,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 22:43:06,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 22:43:06,189 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 22:43:06,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 22:43:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 22:43:06,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 22:43:06,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:43:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 2 proven. 465 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-07 22:43:07,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 22:43:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 2 proven. 465 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-07 22:43:09,939 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 22:43:09,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069815313] [2021-11-07 22:43:09,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069815313] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 22:43:09,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 22:43:09,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2021-11-07 22:43:09,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429300456] [2021-11-07 22:43:09,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 22:43:09,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-07 22:43:09,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 22:43:09,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-07 22:43:09,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=933, Invalid=3099, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 22:43:09,941 INFO L87 Difference]: Start difference. First operand 410 states and 475 transitions. Second operand has 64 states, 64 states have (on average 2.59375) internal successors, (166), 64 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:44:11,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:44:11,718 INFO L93 Difference]: Finished difference Result 805 states and 961 transitions. [2021-11-07 22:44:11,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-07 22:44:11,720 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.59375) internal successors, (166), 64 states have internal predecessors, (166), 0 states have call successors, (0), 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 148 [2021-11-07 22:44:11,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:44:11,721 INFO L225 Difference]: With dead ends: 805 [2021-11-07 22:44:11,721 INFO L226 Difference]: Without dead ends: 440 [2021-11-07 22:44:11,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 24335.02ms TimeCoverageRelationStatistics Valid=2700, Invalid=6042, Unknown=0, NotChecked=0, Total=8742 [2021-11-07 22:44:11,723 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 0 mSDsluCounter, 6231 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39564.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6439 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.01ms SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40165.85ms IncrementalHoareTripleChecker+Time [2021-11-07 22:44:11,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6439 Invalid, 1623 Unknown, 0 Unchecked, 11.01ms Time], IncrementalHoareTripleChecker [555 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 40165.85ms Time] [2021-11-07 22:44:11,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-07 22:44:11,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2021-11-07 22:44:11,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 438 states have (on average 1.1529680365296804) internal successors, (505), 439 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:44:11,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 505 transitions. [2021-11-07 22:44:11,735 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 505 transitions. Word has length 148 [2021-11-07 22:44:11,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:44:11,736 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 505 transitions. [2021-11-07 22:44:11,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.59375) internal successors, (166), 64 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:44:11,736 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 505 transitions. [2021-11-07 22:44:11,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-07 22:44:11,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:44:11,737 INFO L514 BasicCegarLoop]: trace histogram [44, 31, 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] [2021-11-07 22:44:11,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 22:44:11,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 22:44:11,951 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:44:11,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:44:11,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1100843980, now seen corresponding path program 2 times [2021-11-07 22:44:11,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 22:44:11,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741848634] [2021-11-07 22:44:11,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 22:44:11,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 22:44:11,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 22:44:11,954 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 22:44:11,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 22:44:12,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 22:44:12,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 22:44:12,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 22:44:12,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:44:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 2 proven. 496 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-11-07 22:44:13,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 22:44:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 2 proven. 496 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-11-07 22:44:16,757 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 22:44:16,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741848634] [2021-11-07 22:44:16,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741848634] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 22:44:16,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 22:44:16,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-11-07 22:44:16,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137600130] [2021-11-07 22:44:16,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 22:44:16,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-07 22:44:16,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 22:44:16,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-07 22:44:16,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=3137, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 22:44:16,760 INFO L87 Difference]: Start difference. First operand 440 states and 505 transitions. Second operand has 66 states, 66 states have (on average 2.5454545454545454) internal successors, (168), 66 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:45:21,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:45:21,723 INFO L93 Difference]: Finished difference Result 868 states and 1027 transitions. [2021-11-07 22:45:21,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-07 22:45:21,724 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.5454545454545454) internal successors, (168), 66 states have internal predecessors, (168), 0 states have call successors, (0), 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 178 [2021-11-07 22:45:21,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:45:21,725 INFO L225 Difference]: With dead ends: 868 [2021-11-07 22:45:21,725 INFO L226 Difference]: Without dead ends: 473 [2021-11-07 22:45:21,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 25116.32ms TimeCoverageRelationStatistics Valid=3199, Invalid=6113, Unknown=0, NotChecked=0, Total=9312 [2021-11-07 22:45:21,728 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 0 mSDsluCounter, 6432 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42376.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6640 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.71ms SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43095.71ms IncrementalHoareTripleChecker+Time [2021-11-07 22:45:21,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6640 Invalid, 1919 Unknown, 0 Unchecked, 9.71ms Time], IncrementalHoareTripleChecker [591 Valid, 1328 Invalid, 0 Unknown, 0 Unchecked, 43095.71ms Time] [2021-11-07 22:45:21,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-11-07 22:45:21,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 473. [2021-11-07 22:45:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 471 states have (on average 1.1422505307855626) internal successors, (538), 472 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:45:21,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 538 transitions. [2021-11-07 22:45:21,744 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 538 transitions. Word has length 178 [2021-11-07 22:45:21,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:45:21,745 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 538 transitions. [2021-11-07 22:45:21,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.5454545454545454) internal successors, (168), 66 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:45:21,745 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 538 transitions. [2021-11-07 22:45:21,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-07 22:45:21,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:45:21,747 INFO L514 BasicCegarLoop]: trace histogram [64, 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] [2021-11-07 22:45:21,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 22:45:21,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 22:45:21,963 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:45:21,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:45:21,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1145284768, now seen corresponding path program 3 times [2021-11-07 22:45:21,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 22:45:21,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255648965] [2021-11-07 22:45:21,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 22:45:21,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 22:45:21,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 22:45:21,966 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 22:45:21,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 22:45:22,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 22:45:22,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 22:45:22,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 22:45:22,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:45:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3070 trivial. 0 not checked. [2021-11-07 22:45:22,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 22:45:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3070 trivial. 0 not checked. [2021-11-07 22:45:23,177 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 22:45:23,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255648965] [2021-11-07 22:45:23,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255648965] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 22:45:23,178 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 22:45:23,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 22:45:23,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85077785] [2021-11-07 22:45:23,178 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 22:45:23,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 22:45:23,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 22:45:23,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 22:45:23,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 22:45:23,179 INFO L87 Difference]: Start difference. First operand 473 states and 538 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) [2021-11-07 22:45:25,322 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 22:45:26,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:45:26,090 INFO L93 Difference]: Finished difference Result 983 states and 1122 transitions. [2021-11-07 22:45:26,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 22:45:26,091 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 211 [2021-11-07 22:45:26,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:45:26,093 INFO L225 Difference]: With dead ends: 983 [2021-11-07 22:45:26,093 INFO L226 Difference]: Without dead ends: 555 [2021-11-07 22:45:26,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.07ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 22:45:26,094 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 395 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2802.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.05ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2882.16ms IncrementalHoareTripleChecker+Time [2021-11-07 22:45:26,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 335 Invalid, 82 Unknown, 0 Unchecked, 1.05ms Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 1 Unknown, 0 Unchecked, 2882.16ms Time] [2021-11-07 22:45:26,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-07 22:45:26,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 548. [2021-11-07 22:45:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 546 states have (on average 1.1446886446886446) internal successors, (625), 547 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:45:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 625 transitions. [2021-11-07 22:45:26,115 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 625 transitions. Word has length 211 [2021-11-07 22:45:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:45:26,115 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 625 transitions. [2021-11-07 22:45:26,115 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) [2021-11-07 22:45:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 625 transitions. [2021-11-07 22:45:26,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-07 22:45:26,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:45:26,117 INFO L514 BasicCegarLoop]: trace histogram [64, 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] [2021-11-07 22:45:26,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 22:45:26,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 22:45:26,329 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:45:26,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:45:26,329 INFO L85 PathProgramCache]: Analyzing trace with hash 670931834, now seen corresponding path program 1 times [2021-11-07 22:45:26,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 22:45:26,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142204742] [2021-11-07 22:45:26,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 22:45:26,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 22:45:26,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 22:45:26,331 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 22:45:26,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 22:45:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 22:45:27,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-07 22:45:27,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:45:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 2 proven. 2080 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-11-07 22:45:29,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 22:45:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 2 proven. 2080 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-11-07 22:45:39,845 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 22:45:39,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142204742] [2021-11-07 22:45:39,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142204742] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 22:45:39,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 22:45:39,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 132 [2021-11-07 22:45:39,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860100036] [2021-11-07 22:45:39,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 22:45:39,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-11-07 22:45:39,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 22:45:39,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-11-07 22:45:39,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4486, Invalid=12806, Unknown=0, NotChecked=0, Total=17292 [2021-11-07 22:45:39,850 INFO L87 Difference]: Start difference. First operand 548 states and 625 transitions. Second operand has 132 states, 132 states have (on average 1.8257575757575757) internal successors, (241), 132 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:48:54,032 WARN L860 $PredicateComparison]: unable to prove that (and (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv37 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv7 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv46 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv35 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv40 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv29 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv43 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv31 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv42 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv5 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv54 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv16 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv64 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv41 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv45 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv14 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv6 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv3 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv23 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv53 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv36 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv30 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv47 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv15 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv8 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv50 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv4 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv39 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv63 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv12 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv17 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv62 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv52 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv38 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv11 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv57 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv25 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv55 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv2 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv61 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv18 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv19 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv34 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv10 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv51 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv24 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv58 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv48 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv28 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv49 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv33 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv20 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv1 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv56 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv44 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv13 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv32 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv21 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv60 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv26 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv27 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233| (_ bv9 32)) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv22 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|) (bvult (bvadd (_ bv59 32) |c_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr233|) |c_ULTIMATE.start_#Ultimate.C_memset_#amount|)) is different from true [2021-11-07 22:49:02,193 WARN L227 SmtUtils]: Spent 5.63s on a formula simplification that was a NOOP. DAG size: 193 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-07 22:49:11,555 WARN L227 SmtUtils]: Spent 6.86s on a formula simplification that was a NOOP. DAG size: 190 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-07 22:49:19,200 WARN L227 SmtUtils]: Spent 5.07s on a formula simplification that was a NOOP. DAG size: 187 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-07 22:50:45,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 22:50:45,811 INFO L93 Difference]: Finished difference Result 1003 states and 1217 transitions. [2021-11-07 22:50:45,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-11-07 22:50:45,813 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.8257575757575757) internal successors, (241), 132 states have internal predecessors, (241), 0 states have call successors, (0), 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 218 [2021-11-07 22:50:45,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 22:50:45,814 INFO L225 Difference]: With dead ends: 1003 [2021-11-07 22:50:45,814 INFO L226 Difference]: Without dead ends: 614 [2021-11-07 22:50:45,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 200804.47ms TimeCoverageRelationStatistics Valid=12741, Invalid=25092, Unknown=1, NotChecked=386, Total=38220 [2021-11-07 22:50:45,820 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 0 mSDsluCounter, 13065 mSDsCounter, 0 mSdLazyCounter, 4767 mSolverCounterSat, 1119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 113641.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13273 SdHoareTripleChecker+Invalid, 5887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.05ms SdHoareTripleChecker+Time, 1119 IncrementalHoareTripleChecker+Valid, 4767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 116471.33ms IncrementalHoareTripleChecker+Time [2021-11-07 22:50:45,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13273 Invalid, 5887 Unknown, 0 Unchecked, 33.05ms Time], IncrementalHoareTripleChecker [1119 Valid, 4767 Invalid, 0 Unknown, 1 Unchecked, 116471.33ms Time] [2021-11-07 22:50:45,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-07 22:50:45,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2021-11-07 22:50:45,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 612 states have (on average 1.1290849673202614) internal successors, (691), 613 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:50:45,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 691 transitions. [2021-11-07 22:50:45,853 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 691 transitions. Word has length 218 [2021-11-07 22:50:45,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 22:50:45,853 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 691 transitions. [2021-11-07 22:50:45,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.8257575757575757) internal successors, (241), 132 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 22:50:45,854 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 691 transitions. [2021-11-07 22:50:45,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-07 22:50:45,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 22:50:45,856 INFO L514 BasicCegarLoop]: trace histogram [130, 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] [2021-11-07 22:50:45,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 22:50:46,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 22:50:46,064 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 22:50:46,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 22:50:46,064 INFO L85 PathProgramCache]: Analyzing trace with hash 249759226, now seen corresponding path program 2 times [2021-11-07 22:50:46,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 22:50:46,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508552069] [2021-11-07 22:50:46,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 22:50:46,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 22:50:46,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 22:50:46,066 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 22:50:46,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 22:50:47,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 22:50:47,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 22:50:47,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 133 conjunts are in the unsatisfiable core [2021-11-07 22:50:47,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 22:50:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9507 backedges. 2 proven. 8515 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-11-07 22:50:57,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 22:51:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9507 backedges. 2 proven. 8515 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-11-07 22:51:40,225 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 22:51:40,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508552069] [2021-11-07 22:51:40,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508552069] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 22:51:40,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 22:51:40,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 264 [2021-11-07 22:51:40,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451096420] [2021-11-07 22:51:40,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 22:51:40,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 264 states [2021-11-07 22:51:40,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 22:51:40,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 264 interpolants. [2021-11-07 22:51:40,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17686, Invalid=51746, Unknown=0, NotChecked=0, Total=69432 [2021-11-07 22:51:40,234 INFO L87 Difference]: Start difference. First operand 614 states and 691 transitions. Second operand has 264 states, 264 states have (on average 1.4128787878787878) internal successors, (373), 264 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Killed by 15