./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 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/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 64bit --witnessprinter.graph.data.programhash 03d55f274509719e259063891bf7f51d6ae3645569d8243a0d7434c1b24ad753 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 14:45:35,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 14:45:35,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 14:45:35,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 14:45:35,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 14:45:35,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 14:45:35,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 14:45:35,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 14:45:35,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 14:45:35,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 14:45:35,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 14:45:35,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 14:45:35,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 14:45:35,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 14:45:36,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 14:45:36,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 14:45:36,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 14:45:36,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 14:45:36,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 14:45:36,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 14:45:36,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 14:45:36,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 14:45:36,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 14:45:36,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 14:45:36,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 14:45:36,019 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 14:45:36,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 14:45:36,020 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 14:45:36,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 14:45:36,021 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 14:45:36,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 14:45:36,022 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 14:45:36,023 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 14:45:36,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 14:45:36,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 14:45:36,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 14:45:36,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 14:45:36,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 14:45:36,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 14:45:36,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 14:45:36,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 14:45:36,029 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 14:45:36,048 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 14:45:36,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 14:45:36,049 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 14:45:36,049 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 14:45:36,050 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 14:45:36,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 14:45:36,051 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 14:45:36,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 14:45:36,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 14:45:36,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 14:45:36,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 14:45:36,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 14:45:36,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 14:45:36,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 14:45:36,053 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 14:45:36,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 14:45:36,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 14:45:36,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 14:45:36,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 14:45:36,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:45:36,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 14:45:36,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 14:45:36,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 14:45:36,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 14:45:36,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 14:45:36,055 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 14:45:36,055 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 14:45:36,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 14:45:36,056 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 14:45:36,056 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03d55f274509719e259063891bf7f51d6ae3645569d8243a0d7434c1b24ad753 [2021-11-06 14:45:36,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 14:45:36,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 14:45:36,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 14:45:36,291 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 14:45:36,293 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 14:45:36,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-11-06 14:45:36,353 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26425a517/07908c4b363d425dae6054b4003ed498/FLAGf6f7b8cf2 [2021-11-06 14:45:37,064 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 14:45:37,065 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-11-06 14:45:37,110 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26425a517/07908c4b363d425dae6054b4003ed498/FLAGf6f7b8cf2 [2021-11-06 14:45:37,160 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26425a517/07908c4b363d425dae6054b4003ed498 [2021-11-06 14:45:37,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 14:45:37,165 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 14:45:37,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 14:45:37,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 14:45:37,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 14:45:37,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:45:37" (1/1) ... [2021-11-06 14:45:37,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a789707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:45:37, skipping insertion in model container [2021-11-06 14:45:37,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:45:37" (1/1) ... [2021-11-06 14:45:37,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 14:45:37,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 14:45:37,918 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/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[206925,206938] [2021-11-06 14:45:38,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:45:38,402 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 14:45:38,560 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/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[206925,206938] [2021-11-06 14:45:38,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:45:38,770 INFO L208 MainTranslator]: Completed translation [2021-11-06 14:45:38,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:45:38 WrapperNode [2021-11-06 14:45:38,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 14:45:38,773 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 14:45:38,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 14:45:38,773 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 14:45:38,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:45:38" (1/1) ... [2021-11-06 14:45:38,871 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:45:38" (1/1) ... [2021-11-06 14:45:39,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 14:45:39,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 14:45:39,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 14:45:39,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 14:45:39,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:45:38" (1/1) ... [2021-11-06 14:45:39,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:45:38" (1/1) ... [2021-11-06 14:45:39,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:45:38" (1/1) ... [2021-11-06 14:45:39,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:45:38" (1/1) ... [2021-11-06 14:45:39,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:45:38" (1/1) ... [2021-11-06 14:45:39,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:45:38" (1/1) ... [2021-11-06 14:45:39,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:45:38" (1/1) ... [2021-11-06 14:45:39,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 14:45:39,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 14:45:39,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 14:45:39,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 14:45:39,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:45:38" (1/1) ... [2021-11-06 14:45:39,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:45:39,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:45:39,304 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) [2021-11-06 14:45:39,325 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 [2021-11-06 14:45:39,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 14:45:39,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 14:45:39,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 14:45:39,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 14:45:39,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 14:45:39,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 14:45:39,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 14:45:39,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 14:45:39,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 14:45:39,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 14:45:39,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 14:45:39,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 14:45:39,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 14:45:39,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u8 [2021-11-06 14:45:39,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 14:45:39,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 14:45:52,495 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 14:45:52,496 INFO L299 CfgBuilder]: Removed 861 assume(true) statements. [2021-11-06 14:45:52,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:45:52 BoogieIcfgContainer [2021-11-06 14:45:52,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 14:45:52,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 14:45:52,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 14:45:52,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 14:45:52,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:45:37" (1/3) ... [2021-11-06 14:45:52,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@db79b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:45:52, skipping insertion in model container [2021-11-06 14:45:52,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:45:38" (2/3) ... [2021-11-06 14:45:52,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@db79b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:45:52, skipping insertion in model container [2021-11-06 14:45:52,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:45:52" (3/3) ... [2021-11-06 14:45:52,505 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-11-06 14:45:52,509 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 14:45:52,509 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-06 14:45:52,550 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 14:45:52,555 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 [2021-11-06 14:45:52,555 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-06 14:45:52,581 INFO L276 IsEmpty]: Start isEmpty. Operand has 937 states, 935 states have (on average 1.4609625668449198) internal successors, (1366), 936 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:52,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-06 14:45:52,595 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:52,596 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:45:52,596 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:52,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:52,605 INFO L85 PathProgramCache]: Analyzing trace with hash -353898557, now seen corresponding path program 1 times [2021-11-06 14:45:52,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:52,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601537981] [2021-11-06 14:45:52,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:52,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:45:53,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:53,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601537981] [2021-11-06 14:45:53,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601537981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:53,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:53,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:45:53,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722385432] [2021-11-06 14:45:53,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:45:53,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:53,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:45:53,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:45:53,144 INFO L87 Difference]: Start difference. First operand has 937 states, 935 states have (on average 1.4609625668449198) internal successors, (1366), 936 states have internal predecessors, (1366), 0 states have call successors, (0), 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 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:55,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:55,502 INFO L93 Difference]: Finished difference Result 2743 states and 4010 transitions. [2021-11-06 14:45:55,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:45:55,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-11-06 14:45:55,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:55,522 INFO L225 Difference]: With dead ends: 2743 [2021-11-06 14:45:55,523 INFO L226 Difference]: Without dead ends: 1799 [2021-11-06 14:45:55,529 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:45:55,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-11-06 14:45:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1799. [2021-11-06 14:45:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1798 states have (on average 1.3976640711902113) internal successors, (2513), 1798 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:55,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 2513 transitions. [2021-11-06 14:45:55,641 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 2513 transitions. Word has length 26 [2021-11-06 14:45:55,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:55,643 INFO L470 AbstractCegarLoop]: Abstraction has 1799 states and 2513 transitions. [2021-11-06 14:45:55,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:55,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 2513 transitions. [2021-11-06 14:45:55,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-06 14:45:55,650 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:55,651 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:45:55,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 14:45:55,654 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:55,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:55,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1963654372, now seen corresponding path program 1 times [2021-11-06 14:45:55,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:55,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255067949] [2021-11-06 14:45:55,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:55,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:45:56,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:56,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255067949] [2021-11-06 14:45:56,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255067949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:56,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:56,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:45:56,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623363903] [2021-11-06 14:45:56,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:45:56,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:56,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:45:56,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:45:56,072 INFO L87 Difference]: Start difference. First operand 1799 states and 2513 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:56,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:56,823 INFO L93 Difference]: Finished difference Result 5355 states and 7490 transitions. [2021-11-06 14:45:56,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:45:56,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-11-06 14:45:56,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:56,837 INFO L225 Difference]: With dead ends: 5355 [2021-11-06 14:45:56,837 INFO L226 Difference]: Without dead ends: 3568 [2021-11-06 14:45:56,842 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:45:56,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2021-11-06 14:45:56,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 3568. [2021-11-06 14:45:56,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3568 states, 3567 states have (on average 1.3908045977011494) internal successors, (4961), 3567 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:56,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3568 states to 3568 states and 4961 transitions. [2021-11-06 14:45:56,943 INFO L78 Accepts]: Start accepts. Automaton has 3568 states and 4961 transitions. Word has length 37 [2021-11-06 14:45:56,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:56,943 INFO L470 AbstractCegarLoop]: Abstraction has 3568 states and 4961 transitions. [2021-11-06 14:45:56,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:56,944 INFO L276 IsEmpty]: Start isEmpty. Operand 3568 states and 4961 transitions. [2021-11-06 14:45:56,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-06 14:45:56,950 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:56,950 INFO L513 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] [2021-11-06 14:45:56,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 14:45:56,951 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:56,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:56,952 INFO L85 PathProgramCache]: Analyzing trace with hash 2101632258, now seen corresponding path program 1 times [2021-11-06 14:45:56,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:56,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42778447] [2021-11-06 14:45:56,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:56,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:45:57,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:57,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42778447] [2021-11-06 14:45:57,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42778447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:57,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:57,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:45:57,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987697596] [2021-11-06 14:45:57,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:45:57,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:57,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:45:57,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:45:57,109 INFO L87 Difference]: Start difference. First operand 3568 states and 4961 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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) [2021-11-06 14:45:57,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:57,378 INFO L93 Difference]: Finished difference Result 9350 states and 12974 transitions. [2021-11-06 14:45:57,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:45:57,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 65 [2021-11-06 14:45:57,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:57,404 INFO L225 Difference]: With dead ends: 9350 [2021-11-06 14:45:57,404 INFO L226 Difference]: Without dead ends: 5802 [2021-11-06 14:45:57,414 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:45:57,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5802 states. [2021-11-06 14:45:57,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5802 to 5792. [2021-11-06 14:45:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 5791 states have (on average 1.3854256605076842) internal successors, (8023), 5791 states have internal predecessors, (8023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 8023 transitions. [2021-11-06 14:45:57,587 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 8023 transitions. Word has length 65 [2021-11-06 14:45:57,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:57,588 INFO L470 AbstractCegarLoop]: Abstraction has 5792 states and 8023 transitions. [2021-11-06 14:45:57,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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) [2021-11-06 14:45:57,588 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 8023 transitions. [2021-11-06 14:45:57,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-06 14:45:57,595 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:57,595 INFO L513 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, 1] [2021-11-06 14:45:57,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 14:45:57,596 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:57,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:57,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1039674557, now seen corresponding path program 1 times [2021-11-06 14:45:57,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:57,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178017147] [2021-11-06 14:45:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:57,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:45:57,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:57,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178017147] [2021-11-06 14:45:57,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178017147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:57,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:57,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:45:57,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612885909] [2021-11-06 14:45:57,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:45:57,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:57,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:45:57,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:45:57,775 INFO L87 Difference]: Start difference. First operand 5792 states and 8023 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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) [2021-11-06 14:45:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:58,060 INFO L93 Difference]: Finished difference Result 13009 states and 18075 transitions. [2021-11-06 14:45:58,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:45:58,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 73 [2021-11-06 14:45:58,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:58,086 INFO L225 Difference]: With dead ends: 13009 [2021-11-06 14:45:58,086 INFO L226 Difference]: Without dead ends: 7237 [2021-11-06 14:45:58,096 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:45:58,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7237 states. [2021-11-06 14:45:58,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7237 to 7200. [2021-11-06 14:45:58,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7200 states, 7199 states have (on average 1.3928323378246978) internal successors, (10027), 7199 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:58,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7200 states to 7200 states and 10027 transitions. [2021-11-06 14:45:58,297 INFO L78 Accepts]: Start accepts. Automaton has 7200 states and 10027 transitions. Word has length 73 [2021-11-06 14:45:58,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:58,299 INFO L470 AbstractCegarLoop]: Abstraction has 7200 states and 10027 transitions. [2021-11-06 14:45:58,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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) [2021-11-06 14:45:58,299 INFO L276 IsEmpty]: Start isEmpty. Operand 7200 states and 10027 transitions. [2021-11-06 14:45:58,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-06 14:45:58,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:58,309 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 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, 1, 1, 1] [2021-11-06 14:45:58,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 14:45:58,310 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:58,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:58,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1348425671, now seen corresponding path program 1 times [2021-11-06 14:45:58,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:58,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806216346] [2021-11-06 14:45:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:58,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:58,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:45:58,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:58,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806216346] [2021-11-06 14:45:58,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806216346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:58,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:58,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:45:58,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996539409] [2021-11-06 14:45:58,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:45:58,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:58,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:45:58,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:45:58,606 INFO L87 Difference]: Start difference. First operand 7200 states and 10027 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:59,726 INFO L93 Difference]: Finished difference Result 31158 states and 43550 transitions. [2021-11-06 14:45:59,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:45:59,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 80 [2021-11-06 14:45:59,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:59,825 INFO L225 Difference]: With dead ends: 31158 [2021-11-06 14:45:59,825 INFO L226 Difference]: Without dead ends: 23978 [2021-11-06 14:45:59,849 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:45:59,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23978 states. [2021-11-06 14:46:00,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23978 to 7424. [2021-11-06 14:46:00,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7424 states, 7423 states have (on average 1.380978041223225) internal successors, (10251), 7423 states have internal predecessors, (10251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:46:00,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7424 states to 7424 states and 10251 transitions. [2021-11-06 14:46:00,326 INFO L78 Accepts]: Start accepts. Automaton has 7424 states and 10251 transitions. Word has length 80 [2021-11-06 14:46:00,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:46:00,327 INFO L470 AbstractCegarLoop]: Abstraction has 7424 states and 10251 transitions. [2021-11-06 14:46:00,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:46:00,328 INFO L276 IsEmpty]: Start isEmpty. Operand 7424 states and 10251 transitions. [2021-11-06 14:46:00,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-06 14:46:00,338 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:46:00,338 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 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, 1, 1, 1, 1, 1, 1] [2021-11-06 14:46:00,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 14:46:00,339 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:46:00,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:46:00,340 INFO L85 PathProgramCache]: Analyzing trace with hash 591979128, now seen corresponding path program 1 times [2021-11-06 14:46:00,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:46:00,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196068238] [2021-11-06 14:46:00,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:46:00,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:46:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:46:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 14:46:01,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:46:01,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196068238] [2021-11-06 14:46:01,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196068238] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:46:01,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:46:01,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:46:01,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954215898] [2021-11-06 14:46:01,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:46:01,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:46:01,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:46:01,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:46:01,610 INFO L87 Difference]: Start difference. First operand 7424 states and 10251 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:46:01,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:46:01,790 INFO L93 Difference]: Finished difference Result 14830 states and 20481 transitions. [2021-11-06 14:46:01,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:46:01,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-06 14:46:01,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:46:01,810 INFO L225 Difference]: With dead ends: 14830 [2021-11-06 14:46:01,810 INFO L226 Difference]: Without dead ends: 7425 [2021-11-06 14:46:01,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:46:01,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7425 states. [2021-11-06 14:46:02,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7425 to 7425. [2021-11-06 14:46:02,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7425 states, 7424 states have (on average 1.380926724137931) internal successors, (10252), 7424 states have internal predecessors, (10252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:46:02,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7425 states to 7425 states and 10252 transitions. [2021-11-06 14:46:02,068 INFO L78 Accepts]: Start accepts. Automaton has 7425 states and 10252 transitions. Word has length 83 [2021-11-06 14:46:02,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:46:02,070 INFO L470 AbstractCegarLoop]: Abstraction has 7425 states and 10252 transitions. [2021-11-06 14:46:02,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:46:02,070 INFO L276 IsEmpty]: Start isEmpty. Operand 7425 states and 10252 transitions. [2021-11-06 14:46:02,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-06 14:46:02,080 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:46:02,080 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:46:02,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 14:46:02,081 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:46:02,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:46:02,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1244166917, now seen corresponding path program 1 times [2021-11-06 14:46:02,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:46:02,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162334073] [2021-11-06 14:46:02,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:46:02,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:46:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:46:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 14:46:03,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:46:03,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162334073] [2021-11-06 14:46:03,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162334073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:46:03,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504521322] [2021-11-06 14:46:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:46:03,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:46:03,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:46:03,128 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) [2021-11-06 14:46:03,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 14:46:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:46:03,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 2173 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-06 14:46:03,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:46:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:46:04,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504521322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:46:04,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:46:04,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-06 14:46:04,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563903915] [2021-11-06 14:46:04,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:46:04,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:46:04,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:46:04,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:46:04,385 INFO L87 Difference]: Start difference. First operand 7425 states and 10252 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:46:06,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:46:06,835 INFO L93 Difference]: Finished difference Result 11226 states and 15497 transitions. [2021-11-06 14:46:06,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:46:06,836 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 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 84 [2021-11-06 14:46:06,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:46:06,845 INFO L225 Difference]: With dead ends: 11226 [2021-11-06 14:46:06,845 INFO L226 Difference]: Without dead ends: 3812 [2021-11-06 14:46:06,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:46:06,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3812 states. [2021-11-06 14:46:06,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3812 to 3758. [2021-11-06 14:46:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3758 states, 3757 states have (on average 1.3808890071865851) internal successors, (5188), 3757 states have internal predecessors, (5188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:46:06,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3758 states to 3758 states and 5188 transitions. [2021-11-06 14:46:06,990 INFO L78 Accepts]: Start accepts. Automaton has 3758 states and 5188 transitions. Word has length 84 [2021-11-06 14:46:06,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:46:06,991 INFO L470 AbstractCegarLoop]: Abstraction has 3758 states and 5188 transitions. [2021-11-06 14:46:06,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:46:06,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3758 states and 5188 transitions. [2021-11-06 14:46:07,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-06 14:46:07,002 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:46:07,002 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:46:07,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-06 14:46:07,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:46:07,228 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:46:07,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:46:07,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1444785888, now seen corresponding path program 1 times [2021-11-06 14:46:07,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:46:07,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756198780] [2021-11-06 14:46:07,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:46:07,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:46:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:46:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 14:46:07,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:46:07,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756198780] [2021-11-06 14:46:07,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756198780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:46:07,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319137669] [2021-11-06 14:46:07,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:46:07,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:46:07,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:46:07,882 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) [2021-11-06 14:46:07,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 14:48:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:48:34,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 2198 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-06 14:48:34,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:48:35,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 14:48:35,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319137669] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:48:35,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:48:35,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-06 14:48:35,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391324054] [2021-11-06 14:48:35,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:48:35,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:48:35,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:48:35,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:48:35,329 INFO L87 Difference]: Start difference. First operand 3758 states and 5188 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:48:35,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:48:35,458 INFO L93 Difference]: Finished difference Result 7497 states and 10354 transitions. [2021-11-06 14:48:35,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:48:35,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 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 86 [2021-11-06 14:48:35,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:48:35,468 INFO L225 Difference]: With dead ends: 7497 [2021-11-06 14:48:35,468 INFO L226 Difference]: Without dead ends: 3759 [2021-11-06 14:48:35,473 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:48:35,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2021-11-06 14:48:35,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3759. [2021-11-06 14:48:35,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.3807876530069185) internal successors, (5189), 3758 states have internal predecessors, (5189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:48:35,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5189 transitions. [2021-11-06 14:48:35,585 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5189 transitions. Word has length 86 [2021-11-06 14:48:35,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:48:35,586 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 5189 transitions. [2021-11-06 14:48:35,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:48:35,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5189 transitions. [2021-11-06 14:48:35,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-06 14:48:35,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:48:35,593 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:48:35,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-06 14:48:35,813 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,SelfDestructingSolverStorable7 [2021-11-06 14:48:35,813 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:48:35,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:48:35,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1368130627, now seen corresponding path program 2 times [2021-11-06 14:48:35,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:48:35,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184211098] [2021-11-06 14:48:35,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:48:35,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:48:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:48:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 14:48:36,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:48:36,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184211098] [2021-11-06 14:48:36,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184211098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:48:36,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150742685] [2021-11-06 14:48:36,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:48:36,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:48:36,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:48:36,444 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) [2021-11-06 14:48:36,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 14:58:35,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:58:35,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:58:35,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 2204 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-06 14:58:35,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:58:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:58:36,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150742685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:58:36,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:58:36,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2021-11-06 14:58:36,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015380835] [2021-11-06 14:58:36,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 14:58:36,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:58:36,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 14:58:36,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-06 14:58:36,722 INFO L87 Difference]: Start difference. First operand 3759 states and 5189 transitions. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:58:40,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:58:40,912 INFO L93 Difference]: Finished difference Result 20182 states and 28258 transitions. [2021-11-06 14:58:40,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-06 14:58:40,913 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 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 87 [2021-11-06 14:58:40,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:58:40,953 INFO L225 Difference]: With dead ends: 20182 [2021-11-06 14:58:40,954 INFO L226 Difference]: Without dead ends: 16460 [2021-11-06 14:58:40,967 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-11-06 14:58:40,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16460 states. [2021-11-06 14:58:41,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16460 to 3879. [2021-11-06 14:58:41,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3879 states, 3878 states have (on average 1.3545642083548222) internal successors, (5253), 3878 states have internal predecessors, (5253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:58:41,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3879 states to 3879 states and 5253 transitions. [2021-11-06 14:58:41,283 INFO L78 Accepts]: Start accepts. Automaton has 3879 states and 5253 transitions. Word has length 87 [2021-11-06 14:58:41,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:58:41,283 INFO L470 AbstractCegarLoop]: Abstraction has 3879 states and 5253 transitions. [2021-11-06 14:58:41,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:58:41,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3879 states and 5253 transitions. [2021-11-06 14:58:41,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-06 14:58:41,289 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:58:41,289 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:58:41,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-06 14:58:41,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:58:41,511 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:58:41,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:58:41,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1325263291, now seen corresponding path program 1 times [2021-11-06 14:58:41,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:58:41,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689435410] [2021-11-06 14:58:41,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:58:41,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:58:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:58:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:58:41,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:58:41,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689435410] [2021-11-06 14:58:41,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689435410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:58:41,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:58:41,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:58:41,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197740627] [2021-11-06 14:58:41,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:58:41,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:58:41,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:58:41,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:58:41,820 INFO L87 Difference]: Start difference. First operand 3879 states and 5253 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:58:42,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:58:42,818 INFO L93 Difference]: Finished difference Result 17935 states and 24373 transitions. [2021-11-06 14:58:42,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:58:42,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 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 89 [2021-11-06 14:58:42,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:58:42,853 INFO L225 Difference]: With dead ends: 17935 [2021-11-06 14:58:42,853 INFO L226 Difference]: Without dead ends: 14093 [2021-11-06 14:58:42,866 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:58:42,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14093 states. [2021-11-06 14:58:43,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14093 to 3891. [2021-11-06 14:58:43,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3891 states, 3890 states have (on average 1.3534704370179949) internal successors, (5265), 3890 states have internal predecessors, (5265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:58:43,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3891 states to 3891 states and 5265 transitions. [2021-11-06 14:58:43,154 INFO L78 Accepts]: Start accepts. Automaton has 3891 states and 5265 transitions. Word has length 89 [2021-11-06 14:58:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:58:43,156 INFO L470 AbstractCegarLoop]: Abstraction has 3891 states and 5265 transitions. [2021-11-06 14:58:43,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:58:43,156 INFO L276 IsEmpty]: Start isEmpty. Operand 3891 states and 5265 transitions. [2021-11-06 14:58:43,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-06 14:58:43,163 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:58:43,163 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:58:43,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 14:58:43,164 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:58:43,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:58:43,164 INFO L85 PathProgramCache]: Analyzing trace with hash -508145385, now seen corresponding path program 1 times [2021-11-06 14:58:43,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:58:43,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939069885] [2021-11-06 14:58:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:58:43,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:58:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:58:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 14:58:43,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:58:43,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939069885] [2021-11-06 14:58:43,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939069885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:58:43,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30580485] [2021-11-06 14:58:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:58:43,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:58:43,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:58:43,648 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) [2021-11-06 14:58:43,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process Killed by 15