./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5b36d44f Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.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 cb4cf2f7b619bb65636b8158cc0f6ae5cf90699f1f1c19bf802021a20c422d2c --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5b36d44 [2021-11-07 13:00:39,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 13:00:39,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 13:00:39,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 13:00:39,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 13:00:39,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 13:00:39,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 13:00:39,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 13:00:39,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 13:00:39,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 13:00:39,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 13:00:39,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 13:00:39,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 13:00:39,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 13:00:39,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 13:00:39,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 13:00:39,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 13:00:39,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 13:00:39,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 13:00:39,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 13:00:39,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 13:00:39,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 13:00:39,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 13:00:39,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 13:00:39,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 13:00:39,950 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 13:00:39,950 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 13:00:39,951 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 13:00:39,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 13:00:39,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 13:00:39,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 13:00:39,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 13:00:39,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 13:00:39,958 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 13:00:39,959 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 13:00:39,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 13:00:39,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 13:00:39,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 13:00:39,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 13:00:39,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 13:00:39,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 13:00:39,966 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-07 13:00:39,981 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 13:00:39,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 13:00:39,982 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 13:00:39,982 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 13:00:39,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 13:00:39,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 13:00:39,983 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 13:00:39,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 13:00:39,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 13:00:39,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 13:00:39,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 13:00:39,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 13:00:39,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 13:00:39,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 13:00:39,984 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 13:00:39,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 13:00:39,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 13:00:39,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 13:00:39,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 13:00:39,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 13:00:39,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 13:00:39,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 13:00:39,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 13:00:39,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 13:00:39,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 13:00:39,986 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 13:00:39,986 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 13:00:39,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 13:00:39,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 13:00:39,987 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb4cf2f7b619bb65636b8158cc0f6ae5cf90699f1f1c19bf802021a20c422d2c [2021-11-07 13:00:40,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 13:00:40,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 13:00:40,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 13:00:40,210 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 13:00:40,223 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 13:00:40,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-11-07 13:00:40,298 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c5619b32/f44a550420bc486a92f51a7f35045506/FLAG9ee563e93 [2021-11-07 13:00:40,800 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 13:00:40,800 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-11-07 13:00:40,830 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c5619b32/f44a550420bc486a92f51a7f35045506/FLAG9ee563e93 [2021-11-07 13:00:41,296 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c5619b32/f44a550420bc486a92f51a7f35045506 [2021-11-07 13:00:41,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 13:00:41,299 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 13:00:41,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 13:00:41,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 13:00:41,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 13:00:41,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:00:41" (1/1) ... [2021-11-07 13:00:41,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33652872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:41, skipping insertion in model container [2021-11-07 13:00:41,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:00:41" (1/1) ... [2021-11-07 13:00:41,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 13:00:41,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 13:00:41,782 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_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i[153287,153300] [2021-11-07 13:00:41,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 13:00:41,882 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 13:00:41,996 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_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i[153287,153300] [2021-11-07 13:00:42,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 13:00:42,088 INFO L208 MainTranslator]: Completed translation [2021-11-07 13:00:42,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:42 WrapperNode [2021-11-07 13:00:42,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 13:00:42,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 13:00:42,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 13:00:42,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 13:00:42,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:42" (1/1) ... [2021-11-07 13:00:42,129 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:42" (1/1) ... [2021-11-07 13:00:42,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 13:00:42,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 13:00:42,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 13:00:42,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 13:00:42,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:42" (1/1) ... [2021-11-07 13:00:42,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:42" (1/1) ... [2021-11-07 13:00:42,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:42" (1/1) ... [2021-11-07 13:00:42,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:42" (1/1) ... [2021-11-07 13:00:42,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:42" (1/1) ... [2021-11-07 13:00:42,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:42" (1/1) ... [2021-11-07 13:00:42,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:42" (1/1) ... [2021-11-07 13:00:42,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 13:00:42,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 13:00:42,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 13:00:42,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 13:00:42,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:42" (1/1) ... [2021-11-07 13:00:42,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 13:00:42,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:00:42,305 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 13:00:42,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 13:00:42,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-07 13:00:42,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 13:00:42,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 13:00:42,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 13:00:42,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 13:00:42,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 13:00:42,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 13:00:42,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 13:00:42,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 13:00:42,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 13:00:42,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 13:00:42,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 13:00:42,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-07 13:00:42,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 13:00:42,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 13:00:43,145 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 13:00:43,145 INFO L299 CfgBuilder]: Removed 109 assume(true) statements. [2021-11-07 13:00:43,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:00:43 BoogieIcfgContainer [2021-11-07 13:00:43,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 13:00:43,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 13:00:43,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 13:00:43,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 13:00:43,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:00:41" (1/3) ... [2021-11-07 13:00:43,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a38e586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:00:43, skipping insertion in model container [2021-11-07 13:00:43,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:42" (2/3) ... [2021-11-07 13:00:43,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a38e586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:00:43, skipping insertion in model container [2021-11-07 13:00:43,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:00:43" (3/3) ... [2021-11-07 13:00:43,159 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-11-07 13:00:43,163 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 13:00:43,163 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 13:00:43,197 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 13:00:43,201 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 13:00:43,202 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 13:00:43,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 136 states, 134 states have (on average 1.507462686567164) internal successors, (202), 135 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:43,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 13:00:43,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:00:43,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:00:43,226 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:00:43,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:00:43,234 INFO L85 PathProgramCache]: Analyzing trace with hash -695882203, now seen corresponding path program 1 times [2021-11-07 13:00:43,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:00:43,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158003438] [2021-11-07 13:00:43,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:43,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:00:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:00:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:00:43,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:00:43,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158003438] [2021-11-07 13:00:43,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158003438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:00:43,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:00:43,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:00:43,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438847389] [2021-11-07 13:00:43,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:00:43,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:00:43,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:00:43,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:00:43,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:00:43,559 INFO L87 Difference]: Start difference. First operand has 136 states, 134 states have (on average 1.507462686567164) internal successors, (202), 135 states have internal predecessors, (202), 0 states have call successors, (0), 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 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:43,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:00:43,628 INFO L93 Difference]: Finished difference Result 365 states and 550 transitions. [2021-11-07 13:00:43,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:00:43,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 13:00:43,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:00:43,643 INFO L225 Difference]: With dead ends: 365 [2021-11-07 13:00:43,643 INFO L226 Difference]: Without dead ends: 224 [2021-11-07 13:00:43,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.85ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:00:43,652 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 145 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.51ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.02ms IncrementalHoareTripleChecker+Time [2021-11-07 13:00:43,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 351 Invalid, 15 Unknown, 0 Unchecked, 5.51ms Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 23.02ms Time] [2021-11-07 13:00:43,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-07 13:00:43,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2021-11-07 13:00:43,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.399103139013453) internal successors, (312), 223 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 312 transitions. [2021-11-07 13:00:43,700 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 312 transitions. Word has length 18 [2021-11-07 13:00:43,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:00:43,704 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 312 transitions. [2021-11-07 13:00:43,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:43,704 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 312 transitions. [2021-11-07 13:00:43,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 13:00:43,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:00:43,705 INFO L514 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] [2021-11-07 13:00:43,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 13:00:43,706 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:00:43,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:00:43,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1030357496, now seen corresponding path program 1 times [2021-11-07 13:00:43,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:00:43,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166786925] [2021-11-07 13:00:43,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:43,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:00:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:00:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:00:43,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:00:43,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166786925] [2021-11-07 13:00:43,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166786925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:00:43,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:00:43,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:00:43,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920612322] [2021-11-07 13:00:43,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:00:43,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:00:43,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:00:43,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:00:43,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:00:43,798 INFO L87 Difference]: Start difference. First operand 224 states and 312 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:43,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:00:43,825 INFO L93 Difference]: Finished difference Result 442 states and 618 transitions. [2021-11-07 13:00:43,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:00:43,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-11-07 13:00:43,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:00:43,827 INFO L225 Difference]: With dead ends: 442 [2021-11-07 13:00:43,827 INFO L226 Difference]: Without dead ends: 228 [2021-11-07 13:00:43,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.72ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:00:43,829 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 4 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.59ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.37ms IncrementalHoareTripleChecker+Time [2021-11-07 13:00:43,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 346 Invalid, 9 Unknown, 0 Unchecked, 1.59ms Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 12.37ms Time] [2021-11-07 13:00:43,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-07 13:00:43,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 225. [2021-11-07 13:00:43,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.3973214285714286) internal successors, (313), 224 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:43,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 313 transitions. [2021-11-07 13:00:43,843 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 313 transitions. Word has length 24 [2021-11-07 13:00:43,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:00:43,844 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 313 transitions. [2021-11-07 13:00:43,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:43,844 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 313 transitions. [2021-11-07 13:00:43,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 13:00:43,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:00:43,846 INFO L514 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] [2021-11-07 13:00:43,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 13:00:43,846 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:00:43,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:00:43,847 INFO L85 PathProgramCache]: Analyzing trace with hash 801577585, now seen corresponding path program 1 times [2021-11-07 13:00:43,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:00:43,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749949745] [2021-11-07 13:00:43,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:43,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:00:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:00:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:00:43,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:00:43,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749949745] [2021-11-07 13:00:43,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749949745] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:00:43,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536383867] [2021-11-07 13:00:43,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:43,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:00:43,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:00:43,934 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:00:43,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 13:00:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:00:44,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 13:00:44,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:00:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:00:44,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:00:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:00:44,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536383867] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:00:44,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 13:00:44,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-07 13:00:44,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854190029] [2021-11-07 13:00:44,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-07 13:00:44,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 13:00:44,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:00:44,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 13:00:44,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:00:44,283 INFO L87 Difference]: Start difference. First operand 225 states and 313 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:44,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:00:44,322 INFO L93 Difference]: Finished difference Result 452 states and 632 transitions. [2021-11-07 13:00:44,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 13:00:44,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 28 [2021-11-07 13:00:44,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:00:44,325 INFO L225 Difference]: With dead ends: 452 [2021-11-07 13:00:44,325 INFO L226 Difference]: Without dead ends: 237 [2021-11-07 13:00:44,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 14.66ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:00:44,334 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 27 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.89ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.33ms IncrementalHoareTripleChecker+Time [2021-11-07 13:00:44,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 348 Invalid, 23 Unknown, 0 Unchecked, 1.89ms Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 23.33ms Time] [2021-11-07 13:00:44,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-07 13:00:44,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2021-11-07 13:00:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.3898305084745763) internal successors, (328), 236 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:44,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 328 transitions. [2021-11-07 13:00:44,360 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 328 transitions. Word has length 28 [2021-11-07 13:00:44,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:00:44,361 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 328 transitions. [2021-11-07 13:00:44,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:44,361 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 328 transitions. [2021-11-07 13:00:44,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 13:00:44,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:00:44,366 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:00:44,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 13:00:44,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:00:44,580 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:00:44,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:00:44,580 INFO L85 PathProgramCache]: Analyzing trace with hash 470157532, now seen corresponding path program 2 times [2021-11-07 13:00:44,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:00:44,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066730644] [2021-11-07 13:00:44,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:44,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:00:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:00:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 13:00:44,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:00:44,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066730644] [2021-11-07 13:00:44,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066730644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:00:44,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:00:44,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:00:44,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442806906] [2021-11-07 13:00:44,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:00:44,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:00:44,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:00:44,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:00:44,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:00:44,657 INFO L87 Difference]: Start difference. First operand 237 states and 328 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:44,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:00:44,681 INFO L93 Difference]: Finished difference Result 463 states and 642 transitions. [2021-11-07 13:00:44,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 13:00:44,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 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 40 [2021-11-07 13:00:44,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:00:44,683 INFO L225 Difference]: With dead ends: 463 [2021-11-07 13:00:44,683 INFO L226 Difference]: Without dead ends: 236 [2021-11-07 13:00:44,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.98ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:00:44,684 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 327 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.75ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.14ms IncrementalHoareTripleChecker+Time [2021-11-07 13:00:44,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 456 Invalid, 8 Unknown, 0 Unchecked, 1.75ms Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 9.14ms Time] [2021-11-07 13:00:44,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-07 13:00:44,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-11-07 13:00:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.3787234042553191) internal successors, (324), 235 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 324 transitions. [2021-11-07 13:00:44,709 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 324 transitions. Word has length 40 [2021-11-07 13:00:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:00:44,710 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 324 transitions. [2021-11-07 13:00:44,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 324 transitions. [2021-11-07 13:00:44,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 13:00:44,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:00:44,714 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-11-07 13:00:44,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 13:00:44,714 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:00:44,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:00:44,715 INFO L85 PathProgramCache]: Analyzing trace with hash -739730167, now seen corresponding path program 1 times [2021-11-07 13:00:44,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:00:44,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288581440] [2021-11-07 13:00:44,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:44,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:00:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:00:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 13:00:44,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:00:44,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288581440] [2021-11-07 13:00:44,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288581440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:00:44,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:00:44,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 13:00:44,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006167535] [2021-11-07 13:00:44,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:00:44,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 13:00:44,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:00:44,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 13:00:44,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:00:44,832 INFO L87 Difference]: Start difference. First operand 236 states and 324 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:44,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:00:44,893 INFO L93 Difference]: Finished difference Result 686 states and 947 transitions. [2021-11-07 13:00:44,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:00:44,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 13:00:44,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:00:44,898 INFO L225 Difference]: With dead ends: 686 [2021-11-07 13:00:44,898 INFO L226 Difference]: Without dead ends: 456 [2021-11-07 13:00:44,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.11ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:00:44,899 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 143 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.62ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.10ms IncrementalHoareTripleChecker+Time [2021-11-07 13:00:44,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 654 Invalid, 43 Unknown, 0 Unchecked, 1.62ms Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 38.10ms Time] [2021-11-07 13:00:44,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-11-07 13:00:44,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 448. [2021-11-07 13:00:44,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.3825503355704698) internal successors, (618), 447 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 618 transitions. [2021-11-07 13:00:44,919 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 618 transitions. Word has length 51 [2021-11-07 13:00:44,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:00:44,921 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 618 transitions. [2021-11-07 13:00:44,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:44,921 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 618 transitions. [2021-11-07 13:00:44,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 13:00:44,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:00:44,922 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-11-07 13:00:44,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 13:00:44,922 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:00:44,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:00:44,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1388265716, now seen corresponding path program 1 times [2021-11-07 13:00:44,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:00:44,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326556311] [2021-11-07 13:00:44,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:44,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:00:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:00:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 13:00:44,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:00:44,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326556311] [2021-11-07 13:00:44,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326556311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:00:44,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:00:44,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:00:44,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872394859] [2021-11-07 13:00:44,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:00:44,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:00:44,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:00:44,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:00:44,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:00:44,995 INFO L87 Difference]: Start difference. First operand 448 states and 618 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:45,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:00:45,021 INFO L93 Difference]: Finished difference Result 789 states and 1084 transitions. [2021-11-07 13:00:45,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:00:45,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 76 [2021-11-07 13:00:45,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:00:45,023 INFO L225 Difference]: With dead ends: 789 [2021-11-07 13:00:45,023 INFO L226 Difference]: Without dead ends: 351 [2021-11-07 13:00:45,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.33ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:00:45,026 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 43 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.57ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.67ms IncrementalHoareTripleChecker+Time [2021-11-07 13:00:45,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 335 Invalid, 14 Unknown, 0 Unchecked, 0.57ms Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 13.67ms Time] [2021-11-07 13:00:45,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-07 13:00:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 303. [2021-11-07 13:00:45,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.3774834437086092) internal successors, (416), 302 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:45,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 416 transitions. [2021-11-07 13:00:45,036 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 416 transitions. Word has length 76 [2021-11-07 13:00:45,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:00:45,036 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 416 transitions. [2021-11-07 13:00:45,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:45,037 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 416 transitions. [2021-11-07 13:00:45,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 13:00:45,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:00:45,038 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-11-07 13:00:45,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 13:00:45,039 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:00:45,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:00:45,040 INFO L85 PathProgramCache]: Analyzing trace with hash -349680290, now seen corresponding path program 2 times [2021-11-07 13:00:45,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:00:45,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799298138] [2021-11-07 13:00:45,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:45,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:00:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:00:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-07 13:00:45,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:00:45,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799298138] [2021-11-07 13:00:45,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799298138] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:00:45,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:00:45,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:00:45,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257532263] [2021-11-07 13:00:45,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:00:45,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:00:45,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:00:45,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:00:45,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:00:45,137 INFO L87 Difference]: Start difference. First operand 303 states and 416 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:45,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:00:45,213 INFO L93 Difference]: Finished difference Result 1262 states and 1746 transitions. [2021-11-07 13:00:45,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:00:45,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 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 76 [2021-11-07 13:00:45,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:00:45,217 INFO L225 Difference]: With dead ends: 1262 [2021-11-07 13:00:45,217 INFO L226 Difference]: Without dead ends: 982 [2021-11-07 13:00:45,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.28ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:00:45,220 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 429 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.64ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.37ms IncrementalHoareTripleChecker+Time [2021-11-07 13:00:45,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 678 Invalid, 37 Unknown, 0 Unchecked, 2.64ms Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 28.37ms Time] [2021-11-07 13:00:45,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-11-07 13:00:45,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 307. [2021-11-07 13:00:45,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.3725490196078431) internal successors, (420), 306 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:45,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 420 transitions. [2021-11-07 13:00:45,237 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 420 transitions. Word has length 76 [2021-11-07 13:00:45,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:00:45,239 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 420 transitions. [2021-11-07 13:00:45,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:45,239 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 420 transitions. [2021-11-07 13:00:45,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 13:00:45,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:00:45,240 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-11-07 13:00:45,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 13:00:45,240 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:00:45,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:00:45,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1490562227, now seen corresponding path program 1 times [2021-11-07 13:00:45,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:00:45,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584458546] [2021-11-07 13:00:45,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:45,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:00:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:00:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-07 13:00:45,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:00:45,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584458546] [2021-11-07 13:00:45,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584458546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:00:45,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:00:45,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 13:00:45,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846101744] [2021-11-07 13:00:45,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:00:45,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 13:00:45,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:00:45,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 13:00:45,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-07 13:00:45,340 INFO L87 Difference]: Start difference. First operand 307 states and 420 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:45,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:00:45,640 INFO L93 Difference]: Finished difference Result 1430 states and 1978 transitions. [2021-11-07 13:00:45,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 13:00:45,641 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 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 79 [2021-11-07 13:00:45,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:00:45,646 INFO L225 Difference]: With dead ends: 1430 [2021-11-07 13:00:45,647 INFO L226 Difference]: Without dead ends: 1146 [2021-11-07 13:00:45,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 131.29ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-11-07 13:00:45,649 INFO L933 BasicCegarLoop]: 577 mSDtfsCounter, 1320 mSDsluCounter, 2103 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1320 SdHoareTripleChecker+Valid, 2680 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.61ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 121.86ms IncrementalHoareTripleChecker+Time [2021-11-07 13:00:45,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1320 Valid, 2680 Invalid, 255 Unknown, 0 Unchecked, 6.61ms Time], IncrementalHoareTripleChecker [17 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 121.86ms Time] [2021-11-07 13:00:45,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2021-11-07 13:00:45,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 311. [2021-11-07 13:00:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.367741935483871) internal successors, (424), 310 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 424 transitions. [2021-11-07 13:00:45,669 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 424 transitions. Word has length 79 [2021-11-07 13:00:45,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:00:45,670 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 424 transitions. [2021-11-07 13:00:45,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:45,670 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 424 transitions. [2021-11-07 13:00:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 13:00:45,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:00:45,671 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-11-07 13:00:45,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 13:00:45,671 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:00:45,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:00:45,672 INFO L85 PathProgramCache]: Analyzing trace with hash -424921966, now seen corresponding path program 1 times [2021-11-07 13:00:45,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:00:45,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054860585] [2021-11-07 13:00:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:45,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:00:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:00:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:00:45,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:00:45,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054860585] [2021-11-07 13:00:45,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054860585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:00:45,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918071705] [2021-11-07 13:00:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:45,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:00:45,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:00:45,742 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:00:45,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 13:00:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:00:45,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 13:00:45,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:00:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:00:46,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:00:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:00:46,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918071705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:00:46,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 13:00:46,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-07 13:00:46,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377798892] [2021-11-07 13:00:46,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-07 13:00:46,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 13:00:46,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:00:46,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 13:00:46,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-07 13:00:46,202 INFO L87 Difference]: Start difference. First operand 311 states and 424 transitions. Second operand has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 13 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:46,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:00:46,265 INFO L93 Difference]: Finished difference Result 647 states and 891 transitions. [2021-11-07 13:00:46,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 13:00:46,266 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 13 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 13:00:46,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:00:46,268 INFO L225 Difference]: With dead ends: 647 [2021-11-07 13:00:46,268 INFO L226 Difference]: Without dead ends: 359 [2021-11-07 13:00:46,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 43.34ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-07 13:00:46,270 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 65 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.26ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.52ms IncrementalHoareTripleChecker+Time [2021-11-07 13:00:46,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 857 Invalid, 54 Unknown, 0 Unchecked, 1.26ms Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 34.52ms Time] [2021-11-07 13:00:46,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-07 13:00:46,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2021-11-07 13:00:46,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.3519553072625698) internal successors, (484), 358 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:46,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 484 transitions. [2021-11-07 13:00:46,292 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 484 transitions. Word has length 81 [2021-11-07 13:00:46,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:00:46,293 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 484 transitions. [2021-11-07 13:00:46,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 13 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:46,294 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 484 transitions. [2021-11-07 13:00:46,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 13:00:46,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:00:46,304 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 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] [2021-11-07 13:00:46,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 13:00:46,530 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,SelfDestructingSolverStorable8 [2021-11-07 13:00:46,531 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:00:46,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:00:46,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1135564292, now seen corresponding path program 2 times [2021-11-07 13:00:46,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:00:46,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185627513] [2021-11-07 13:00:46,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:46,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:00:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:00:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:00:46,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:00:46,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185627513] [2021-11-07 13:00:46,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185627513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:00:46,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757494066] [2021-11-07 13:00:46,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 13:00:46,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:00:46,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:00:46,664 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:00:46,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 13:00:46,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 13:00:46,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 13:00:46,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 13:00:46,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:00:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-11-07 13:00:46,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:00:46,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757494066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:00:46,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 13:00:46,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 14 [2021-11-07 13:00:46,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737805745] [2021-11-07 13:00:46,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:00:46,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:00:46,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:00:46,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:00:46,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-11-07 13:00:46,967 INFO L87 Difference]: Start difference. First operand 359 states and 484 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:46,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:00:46,988 INFO L93 Difference]: Finished difference Result 710 states and 959 transitions. [2021-11-07 13:00:46,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:00:46,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 105 [2021-11-07 13:00:46,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:00:46,990 INFO L225 Difference]: With dead ends: 710 [2021-11-07 13:00:46,990 INFO L226 Difference]: Without dead ends: 360 [2021-11-07 13:00:46,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 50.73ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-11-07 13:00:46,991 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 0 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.64ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.77ms IncrementalHoareTripleChecker+Time [2021-11-07 13:00:46,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 348 Invalid, 3 Unknown, 0 Unchecked, 0.64ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 2.77ms Time] [2021-11-07 13:00:46,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-07 13:00:47,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-11-07 13:00:47,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.350974930362117) internal successors, (485), 359 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:47,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 485 transitions. [2021-11-07 13:00:47,008 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 485 transitions. Word has length 105 [2021-11-07 13:00:47,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:00:47,008 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 485 transitions. [2021-11-07 13:00:47,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:47,008 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 485 transitions. [2021-11-07 13:00:47,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 13:00:47,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:00:47,009 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 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] [2021-11-07 13:00:47,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 13:00:47,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:00:47,229 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:00:47,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:00:47,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1003472491, now seen corresponding path program 1 times [2021-11-07 13:00:47,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:00:47,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518594761] [2021-11-07 13:00:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:47,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:00:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:00:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:00:47,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:00:47,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518594761] [2021-11-07 13:00:47,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518594761] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:00:47,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580473621] [2021-11-07 13:00:47,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:47,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:00:47,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:00:47,338 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:00:47,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 13:00:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:00:47,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 13:00:47,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:00:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:00:47,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:00:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:00:47,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580473621] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:00:47,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 13:00:47,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-11-07 13:00:47,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041601120] [2021-11-07 13:00:47,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-07 13:00:47,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 13:00:47,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:00:47,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 13:00:47,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-07 13:00:47,988 INFO L87 Difference]: Start difference. First operand 360 states and 485 transitions. Second operand has 25 states, 25 states have (on average 6.08) internal successors, (152), 25 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:48,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:00:48,115 INFO L93 Difference]: Finished difference Result 792 states and 1084 transitions. [2021-11-07 13:00:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 13:00:48,116 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.08) internal successors, (152), 25 states have internal predecessors, (152), 0 states have call successors, (0), 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 106 [2021-11-07 13:00:48,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:00:48,117 INFO L225 Difference]: With dead ends: 792 [2021-11-07 13:00:48,117 INFO L226 Difference]: Without dead ends: 456 [2021-11-07 13:00:48,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 156.99ms TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-07 13:00:48,119 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 156 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.36ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 89.77ms IncrementalHoareTripleChecker+Time [2021-11-07 13:00:48,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 870 Invalid, 113 Unknown, 0 Unchecked, 1.36ms Time], IncrementalHoareTripleChecker [16 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 89.77ms Time] [2021-11-07 13:00:48,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-11-07 13:00:48,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 456. [2021-11-07 13:00:48,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.3296703296703296) internal successors, (605), 455 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:48,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 605 transitions. [2021-11-07 13:00:48,139 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 605 transitions. Word has length 106 [2021-11-07 13:00:48,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:00:48,139 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 605 transitions. [2021-11-07 13:00:48,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.08) internal successors, (152), 25 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:48,140 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 605 transitions. [2021-11-07 13:00:48,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-07 13:00:48,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:00:48,141 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 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] [2021-11-07 13:00:48,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 13:00:48,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:00:48,360 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:00:48,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:00:48,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1540940481, now seen corresponding path program 2 times [2021-11-07 13:00:48,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:00:48,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297330843] [2021-11-07 13:00:48,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:48,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:00:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:00:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 7 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:00:48,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:00:48,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297330843] [2021-11-07 13:00:48,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297330843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:00:48,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388942693] [2021-11-07 13:00:48,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 13:00:48,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:00:48,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:00:48,676 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:00:48,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 13:00:48,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 13:00:48,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 13:00:48,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 13:00:48,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:00:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 7 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:00:49,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:00:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 7 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:00:49,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388942693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:00:49,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 13:00:49,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-11-07 13:00:49,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293473438] [2021-11-07 13:00:49,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-07 13:00:49,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 13:00:49,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:00:49,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 13:00:49,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 13:00:49,842 INFO L87 Difference]: Start difference. First operand 456 states and 605 transitions. Second operand has 49 states, 49 states have (on average 5.061224489795919) internal successors, (248), 49 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:50,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:00:50,072 INFO L93 Difference]: Finished difference Result 1080 states and 1468 transitions. [2021-11-07 13:00:50,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 13:00:50,073 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 5.061224489795919) internal successors, (248), 49 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-07 13:00:50,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:00:50,075 INFO L225 Difference]: With dead ends: 1080 [2021-11-07 13:00:50,075 INFO L226 Difference]: Without dead ends: 648 [2021-11-07 13:00:50,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 633.67ms TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 13:00:50,077 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 428 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 112.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.05ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 138.28ms IncrementalHoareTripleChecker+Time [2021-11-07 13:00:50,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 725 Invalid, 224 Unknown, 0 Unchecked, 2.05ms Time], IncrementalHoareTripleChecker [32 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 138.28ms Time] [2021-11-07 13:00:50,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-11-07 13:00:50,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 648. [2021-11-07 13:00:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 1.3060278207109737) internal successors, (845), 647 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 845 transitions. [2021-11-07 13:00:50,104 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 845 transitions. Word has length 154 [2021-11-07 13:00:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:00:50,104 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 845 transitions. [2021-11-07 13:00:50,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 5.061224489795919) internal successors, (248), 49 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 845 transitions. [2021-11-07 13:00:50,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-07 13:00:50,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:00:50,107 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 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] [2021-11-07 13:00:50,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 13:00:50,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 13:00:50,324 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:00:50,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:00:50,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1572102887, now seen corresponding path program 3 times [2021-11-07 13:00:50,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:00:50,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863454447] [2021-11-07 13:00:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:50,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:00:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:00:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4196 backedges. 7 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:00:51,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:00:51,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863454447] [2021-11-07 13:00:51,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863454447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:00:51,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334569076] [2021-11-07 13:00:51,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 13:00:51,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:00:51,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:00:51,243 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:00:51,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 13:00:51,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 13:00:51,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 13:00:51,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 13:00:51,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:00:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4196 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4189 trivial. 0 not checked. [2021-11-07 13:00:52,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:00:52,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334569076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:00:52,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 13:00:52,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [49] total 58 [2021-11-07 13:00:52,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936892035] [2021-11-07 13:00:52,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:00:52,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 13:00:52,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:00:52,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 13:00:52,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1194, Invalid=2112, Unknown=0, NotChecked=0, Total=3306 [2021-11-07 13:00:52,126 INFO L87 Difference]: Start difference. First operand 648 states and 845 transitions. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:53,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:00:53,537 INFO L93 Difference]: Finished difference Result 3906 states and 5096 transitions. [2021-11-07 13:00:53,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 13:00:53,538 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 250 [2021-11-07 13:00:53,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:00:53,547 INFO L225 Difference]: With dead ends: 3906 [2021-11-07 13:00:53,547 INFO L226 Difference]: Without dead ends: 3282 [2021-11-07 13:00:53,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1916.53ms TimeCoverageRelationStatistics Valid=1395, Invalid=4155, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 13:00:53,552 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 2635 mSDsluCounter, 2211 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 154.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2635 SdHoareTripleChecker+Valid, 2578 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.09ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 196.00ms IncrementalHoareTripleChecker+Time [2021-11-07 13:00:53,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2635 Valid, 2578 Invalid, 266 Unknown, 0 Unchecked, 6.09ms Time], IncrementalHoareTripleChecker [13 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 196.00ms Time] [2021-11-07 13:00:53,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2021-11-07 13:00:53,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 662. [2021-11-07 13:00:53,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.2995461422087746) internal successors, (859), 661 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:53,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 859 transitions. [2021-11-07 13:00:53,613 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 859 transitions. Word has length 250 [2021-11-07 13:00:53,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:00:53,613 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 859 transitions. [2021-11-07 13:00:53,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:53,613 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 859 transitions. [2021-11-07 13:00:53,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-07 13:00:53,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:00:53,615 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 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] [2021-11-07 13:00:53,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 13:00:53,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:00:53,823 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:00:53,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:00:53,824 INFO L85 PathProgramCache]: Analyzing trace with hash 2029983850, now seen corresponding path program 1 times [2021-11-07 13:00:53,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:00:53,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473218933] [2021-11-07 13:00:53,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:53,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:00:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:00:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4196 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4189 trivial. 0 not checked. [2021-11-07 13:00:53,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:00:53,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473218933] [2021-11-07 13:00:53,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473218933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:00:53,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:00:53,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:00:53,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372358715] [2021-11-07 13:00:53,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:00:53,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:00:53,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:00:53,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:00:53,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:00:53,942 INFO L87 Difference]: Start difference. First operand 662 states and 859 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) [2021-11-07 13:00:54,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:00:54,020 INFO L93 Difference]: Finished difference Result 1609 states and 2089 transitions. [2021-11-07 13:00:54,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:00:54,021 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 259 [2021-11-07 13:00:54,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:00:54,025 INFO L225 Difference]: With dead ends: 1609 [2021-11-07 13:00:54,025 INFO L226 Difference]: Without dead ends: 1285 [2021-11-07 13:00:54,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.14ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:00:54,026 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 154 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.40ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.52ms IncrementalHoareTripleChecker+Time [2021-11-07 13:00:54,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 490 Invalid, 4 Unknown, 0 Unchecked, 0.40ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 2.52ms Time] [2021-11-07 13:00:54,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-11-07 13:00:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 664. [2021-11-07 13:00:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 1.2986425339366516) internal successors, (861), 663 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:54,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 861 transitions. [2021-11-07 13:00:54,092 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 861 transitions. Word has length 259 [2021-11-07 13:00:54,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:00:54,092 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 861 transitions. [2021-11-07 13:00:54,092 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) [2021-11-07 13:00:54,093 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 861 transitions. [2021-11-07 13:00:54,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-07 13:00:54,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:00:54,096 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 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] [2021-11-07 13:00:54,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 13:00:54,096 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:00:54,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:00:54,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1596267351, now seen corresponding path program 1 times [2021-11-07 13:00:54,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:00:54,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422560189] [2021-11-07 13:00:54,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:54,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:00:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:00:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4196 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4189 trivial. 0 not checked. [2021-11-07 13:00:54,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:00:54,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422560189] [2021-11-07 13:00:54,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422560189] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:00:54,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:00:54,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:00:54,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607593598] [2021-11-07 13:00:54,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:00:54,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:00:54,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:00:54,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:00:54,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:00:54,259 INFO L87 Difference]: Start difference. First operand 664 states and 861 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:54,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:00:54,345 INFO L93 Difference]: Finished difference Result 1607 states and 2084 transitions. [2021-11-07 13:00:54,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 13:00:54,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 261 [2021-11-07 13:00:54,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:00:54,349 INFO L225 Difference]: With dead ends: 1607 [2021-11-07 13:00:54,349 INFO L226 Difference]: Without dead ends: 967 [2021-11-07 13:00:54,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.99ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:00:54,353 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 248 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.71ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.46ms IncrementalHoareTripleChecker+Time [2021-11-07 13:00:54,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 612 Invalid, 23 Unknown, 0 Unchecked, 0.71ms Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 18.46ms Time] [2021-11-07 13:00:54,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-11-07 13:00:54,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 661. [2021-11-07 13:00:54,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 1.2954545454545454) internal successors, (855), 660 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:54,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 855 transitions. [2021-11-07 13:00:54,415 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 855 transitions. Word has length 261 [2021-11-07 13:00:54,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:00:54,416 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 855 transitions. [2021-11-07 13:00:54,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:54,416 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 855 transitions. [2021-11-07 13:00:54,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-07 13:00:54,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:00:54,418 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 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] [2021-11-07 13:00:54,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 13:00:54,418 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:00:54,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:00:54,419 INFO L85 PathProgramCache]: Analyzing trace with hash 767342937, now seen corresponding path program 1 times [2021-11-07 13:00:54,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:00:54,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073624833] [2021-11-07 13:00:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:54,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:00:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:00:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4196 backedges. 7 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:00:55,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:00:55,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073624833] [2021-11-07 13:00:55,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073624833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:00:55,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132613377] [2021-11-07 13:00:55,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:55,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:00:55,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:00:55,316 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:00:55,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 13:00:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:00:55,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 1240 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 13:00:55,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:00:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4196 backedges. 7 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:00:56,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:00:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4196 backedges. 7 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:00:58,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132613377] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:00:58,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 13:00:58,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2021-11-07 13:00:58,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289046453] [2021-11-07 13:00:58,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-07 13:00:58,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-07 13:00:58,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:00:58,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-07 13:00:58,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-07 13:00:58,398 INFO L87 Difference]: Start difference. First operand 661 states and 855 transitions. Second operand has 97 states, 97 states have (on average 4.690721649484536) internal successors, (455), 97 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:59,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:00:59,386 INFO L93 Difference]: Finished difference Result 1682 states and 2256 transitions. [2021-11-07 13:00:59,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-07 13:00:59,387 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.690721649484536) internal successors, (455), 97 states have internal predecessors, (455), 0 states have call successors, (0), 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 265 [2021-11-07 13:00:59,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:00:59,392 INFO L225 Difference]: With dead ends: 1682 [2021-11-07 13:00:59,393 INFO L226 Difference]: Without dead ends: 1045 [2021-11-07 13:00:59,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2528.37ms TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-07 13:00:59,396 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 653 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 291.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.60ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 429.28ms IncrementalHoareTripleChecker+Time [2021-11-07 13:00:59,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 773 Invalid, 437 Unknown, 0 Unchecked, 4.60ms Time], IncrementalHoareTripleChecker [53 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 429.28ms Time] [2021-11-07 13:00:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-11-07 13:00:59,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 1045. [2021-11-07 13:00:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 1.278735632183908) internal successors, (1335), 1044 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:59,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1335 transitions. [2021-11-07 13:00:59,494 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1335 transitions. Word has length 265 [2021-11-07 13:00:59,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:00:59,495 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 1335 transitions. [2021-11-07 13:00:59,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.690721649484536) internal successors, (455), 97 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:00:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1335 transitions. [2021-11-07 13:00:59,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2021-11-07 13:00:59,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:00:59,500 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 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] [2021-11-07 13:00:59,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 13:00:59,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:00:59,716 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:00:59,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:00:59,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1311360009, now seen corresponding path program 2 times [2021-11-07 13:00:59,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:00:59,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849355639] [2021-11-07 13:00:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:00:59,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:00:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:01:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 17588 backedges. 7 proven. 17578 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:01:02,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:01:02,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849355639] [2021-11-07 13:01:02,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849355639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:01:02,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438430021] [2021-11-07 13:01:02,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 13:01:02,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:01:02,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:01:02,709 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:01:02,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 13:01:03,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 13:01:03,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 13:01:03,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 1816 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-07 13:01:03,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:01:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 17588 backedges. 7 proven. 17578 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:01:03,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:01:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17588 backedges. 7 proven. 17578 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:01:12,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438430021] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:01:12,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 13:01:12,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2021-11-07 13:01:12,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238401852] [2021-11-07 13:01:12,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-07 13:01:12,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-11-07 13:01:12,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:01:12,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-11-07 13:01:12,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2021-11-07 13:01:12,239 INFO L87 Difference]: Start difference. First operand 1045 states and 1335 transitions. Second operand has 193 states, 193 states have (on average 4.347150259067358) internal successors, (839), 193 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:01:16,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:01:16,520 INFO L93 Difference]: Finished difference Result 2834 states and 3792 transitions. [2021-11-07 13:01:16,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-07 13:01:16,521 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 4.347150259067358) internal successors, (839), 193 states have internal predecessors, (839), 0 states have call successors, (0), 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 457 [2021-11-07 13:01:16,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:01:16,526 INFO L225 Difference]: With dead ends: 2834 [2021-11-07 13:01:16,527 INFO L226 Difference]: Without dead ends: 1813 [2021-11-07 13:01:16,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1009 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 10034.41ms TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2021-11-07 13:01:16,531 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 1569 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 561.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1569 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.27ms SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 761.89ms IncrementalHoareTripleChecker+Time [2021-11-07 13:01:16,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1569 Valid, 1037 Invalid, 864 Unknown, 0 Unchecked, 8.27ms Time], IncrementalHoareTripleChecker [99 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 761.89ms Time] [2021-11-07 13:01:16,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2021-11-07 13:01:16,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1813. [2021-11-07 13:01:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 1.2665562913907285) internal successors, (2295), 1812 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:01:16,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2295 transitions. [2021-11-07 13:01:16,719 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2295 transitions. Word has length 457 [2021-11-07 13:01:16,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:01:16,720 INFO L470 AbstractCegarLoop]: Abstraction has 1813 states and 2295 transitions. [2021-11-07 13:01:16,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 4.347150259067358) internal successors, (839), 193 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:01:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2295 transitions. [2021-11-07 13:01:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 842 [2021-11-07 13:01:16,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:01:16,737 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 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] [2021-11-07 13:01:16,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 13:01:16,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 13:01:16,960 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:01:16,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:01:16,960 INFO L85 PathProgramCache]: Analyzing trace with hash -538289815, now seen corresponding path program 3 times [2021-11-07 13:01:16,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:01:16,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890450735] [2021-11-07 13:01:16,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:01:16,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:01:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:01:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 72020 backedges. 7 proven. 72010 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:01:28,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:01:28,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890450735] [2021-11-07 13:01:28,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890450735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:01:28,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918493153] [2021-11-07 13:01:28,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 13:01:28,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:01:28,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:01:28,212 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:01:28,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 13:01:28,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 13:01:28,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 13:01:28,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 13:01:28,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:01:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 72020 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72013 trivial. 0 not checked. [2021-11-07 13:01:30,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:01:30,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918493153] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:01:30,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 13:01:30,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [193] total 196 [2021-11-07 13:01:30,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367320578] [2021-11-07 13:01:30,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:01:30,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 13:01:30,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:01:30,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 13:01:30,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18537, Invalid=19683, Unknown=0, NotChecked=0, Total=38220 [2021-11-07 13:01:30,264 INFO L87 Difference]: Start difference. First operand 1813 states and 2295 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:01:30,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:01:30,613 INFO L93 Difference]: Finished difference Result 5412 states and 6857 transitions. [2021-11-07 13:01:30,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:01:30,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 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 841 [2021-11-07 13:01:30,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:01:30,626 INFO L225 Difference]: With dead ends: 5412 [2021-11-07 13:01:30,627 INFO L226 Difference]: Without dead ends: 4511 [2021-11-07 13:01:30,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1033 GetRequests, 839 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 10561.67ms TimeCoverageRelationStatistics Valid=18537, Invalid=19683, Unknown=0, NotChecked=0, Total=38220 [2021-11-07 13:01:30,632 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 548 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.99ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.70ms IncrementalHoareTripleChecker+Time [2021-11-07 13:01:30,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 806 Invalid, 59 Unknown, 0 Unchecked, 0.99ms Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 36.70ms Time] [2021-11-07 13:01:30,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-11-07 13:01:30,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3600. [2021-11-07 13:01:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3600 states, 3599 states have (on average 1.2681300361211447) internal successors, (4564), 3599 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:01:30,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3600 states to 3600 states and 4564 transitions. [2021-11-07 13:01:30,975 INFO L78 Accepts]: Start accepts. Automaton has 3600 states and 4564 transitions. Word has length 841 [2021-11-07 13:01:30,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:01:30,977 INFO L470 AbstractCegarLoop]: Abstraction has 3600 states and 4564 transitions. [2021-11-07 13:01:30,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:01:30,978 INFO L276 IsEmpty]: Start isEmpty. Operand 3600 states and 4564 transitions. [2021-11-07 13:01:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2021-11-07 13:01:30,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:01:30,983 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 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] [2021-11-07 13:01:31,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 13:01:31,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 13:01:31,185 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:01:31,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:01:31,185 INFO L85 PathProgramCache]: Analyzing trace with hash -2024477174, now seen corresponding path program 1 times [2021-11-07 13:01:31,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:01:31,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502792676] [2021-11-07 13:01:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:01:31,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:01:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:01:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 72020 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72013 trivial. 0 not checked. [2021-11-07 13:01:31,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:01:31,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502792676] [2021-11-07 13:01:31,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502792676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:01:31,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:01:31,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:01:31,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681527101] [2021-11-07 13:01:31,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:01:31,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:01:31,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:01:31,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:01:31,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:01:31,522 INFO L87 Difference]: Start difference. First operand 3600 states and 4564 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:01:32,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:01:32,242 INFO L93 Difference]: Finished difference Result 10799 states and 13697 transitions. [2021-11-07 13:01:32,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:01:32,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 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 843 [2021-11-07 13:01:32,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:01:32,268 INFO L225 Difference]: With dead ends: 10799 [2021-11-07 13:01:32,268 INFO L226 Difference]: Without dead ends: 8111 [2021-11-07 13:01:32,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.85ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:01:32,276 INFO L933 BasicCegarLoop]: 469 mSDtfsCounter, 308 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.82ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.96ms IncrementalHoareTripleChecker+Time [2021-11-07 13:01:32,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 1100 Invalid, 26 Unknown, 0 Unchecked, 0.82ms Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 14.96ms Time] [2021-11-07 13:01:32,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8111 states. [2021-11-07 13:01:32,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8111 to 3612. [2021-11-07 13:01:32,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3612 states, 3611 states have (on average 1.2686236499584602) internal successors, (4581), 3611 states have internal predecessors, (4581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:01:32,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3612 states to 3612 states and 4581 transitions. [2021-11-07 13:01:32,613 INFO L78 Accepts]: Start accepts. Automaton has 3612 states and 4581 transitions. Word has length 843 [2021-11-07 13:01:32,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:01:32,614 INFO L470 AbstractCegarLoop]: Abstraction has 3612 states and 4581 transitions. [2021-11-07 13:01:32,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:01:32,614 INFO L276 IsEmpty]: Start isEmpty. Operand 3612 states and 4581 transitions. [2021-11-07 13:01:32,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2021-11-07 13:01:32,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:01:32,620 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 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] [2021-11-07 13:01:32,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 13:01:32,620 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:01:32,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:01:32,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1103618193, now seen corresponding path program 1 times [2021-11-07 13:01:32,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:01:32,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233754004] [2021-11-07 13:01:32,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:01:32,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:01:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:01:43,407 INFO L134 CoverageAnalysis]: Checked inductivity of 72022 backedges. 7 proven. 72010 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 13:01:43,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:01:43,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233754004] [2021-11-07 13:01:43,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233754004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:01:43,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40142374] [2021-11-07 13:01:43,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:01:43,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:01:43,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:01:43,408 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:01:43,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 13:01:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:01:43,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 2977 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-07 13:01:43,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:01:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 72022 backedges. 7 proven. 72010 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 13:01:45,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:01:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 72022 backedges. 7 proven. 72010 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 13:01:54,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40142374] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:01:54,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 13:01:54,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 259 [2021-11-07 13:01:54,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807267031] [2021-11-07 13:01:54,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-07 13:01:54,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 259 states [2021-11-07 13:01:54,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:01:54,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 259 interpolants. [2021-11-07 13:01:54,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33411, Invalid=33411, Unknown=0, NotChecked=0, Total=66822 [2021-11-07 13:01:54,648 INFO L87 Difference]: Start difference. First operand 3612 states and 4581 transitions. Second operand has 259 states, 259 states have (on average 4.285714285714286) internal successors, (1110), 259 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:02:06,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:02:06,395 INFO L93 Difference]: Finished difference Result 8256 states and 10716 transitions. [2021-11-07 13:02:06,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2021-11-07 13:02:06,396 INFO L78 Accepts]: Start accepts. Automaton has has 259 states, 259 states have (on average 4.285714285714286) internal successors, (1110), 259 states have internal predecessors, (1110), 0 states have call successors, (0), 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 845 [2021-11-07 13:02:06,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:02:06,405 INFO L225 Difference]: With dead ends: 8256 [2021-11-07 13:02:06,405 INFO L226 Difference]: Without dead ends: 4668 [2021-11-07 13:02:06,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1881 GetRequests, 1624 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 17900.76ms TimeCoverageRelationStatistics Valid=33411, Invalid=33411, Unknown=0, NotChecked=0, Total=66822 [2021-11-07 13:02:06,416 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 2181 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 729.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2181 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.86ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 976.99ms IncrementalHoareTripleChecker+Time [2021-11-07 13:02:06,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2181 Valid, 1104 Invalid, 1039 Unknown, 0 Unchecked, 12.86ms Time], IncrementalHoareTripleChecker [6 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 976.99ms Time] [2021-11-07 13:02:06,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2021-11-07 13:02:06,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 4668. [2021-11-07 13:02:06,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 4667 states have (on average 1.2644096850224984) internal successors, (5901), 4667 states have internal predecessors, (5901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:02:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 5901 transitions. [2021-11-07 13:02:06,790 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 5901 transitions. Word has length 845 [2021-11-07 13:02:06,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:02:06,791 INFO L470 AbstractCegarLoop]: Abstraction has 4668 states and 5901 transitions. [2021-11-07 13:02:06,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 259 states, 259 states have (on average 4.285714285714286) internal successors, (1110), 259 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:02:06,791 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 5901 transitions. [2021-11-07 13:02:06,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1110 [2021-11-07 13:02:06,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:02:06,800 INFO L514 BasicCegarLoop]: trace histogram [256, 256, 256, 256, 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] [2021-11-07 13:02:06,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-07 13:02:07,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:02:07,001 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:02:07,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:02:07,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1408722243, now seen corresponding path program 2 times [2021-11-07 13:02:07,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:02:07,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12622689] [2021-11-07 13:02:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:02:07,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:02:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:02:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 130828 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 130821 trivial. 0 not checked. [2021-11-07 13:02:07,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:02:07,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12622689] [2021-11-07 13:02:07,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12622689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:02:07,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:02:07,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:02:07,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202818276] [2021-11-07 13:02:07,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:02:07,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:02:07,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:02:07,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:02:07,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:02:07,794 INFO L87 Difference]: Start difference. First operand 4668 states and 5901 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 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) [2021-11-07 13:02:08,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:02:08,557 INFO L93 Difference]: Finished difference Result 13674 states and 17271 transitions. [2021-11-07 13:02:08,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:02:08,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 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 1109 [2021-11-07 13:02:08,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:02:08,573 INFO L225 Difference]: With dead ends: 13674 [2021-11-07 13:02:08,573 INFO L226 Difference]: Without dead ends: 9030 [2021-11-07 13:02:08,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.35ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:02:08,580 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 113 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.33ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.45ms IncrementalHoareTripleChecker+Time [2021-11-07 13:02:08,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 393 Invalid, 3 Unknown, 0 Unchecked, 0.33ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 3.45ms Time] [2021-11-07 13:02:08,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9030 states. [2021-11-07 13:02:08,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9030 to 4656. [2021-11-07 13:02:08,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4656 states, 4655 states have (on average 1.262513426423201) internal successors, (5877), 4655 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:02:08,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4656 states to 4656 states and 5877 transitions. [2021-11-07 13:02:08,978 INFO L78 Accepts]: Start accepts. Automaton has 4656 states and 5877 transitions. Word has length 1109 [2021-11-07 13:02:08,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:02:08,979 INFO L470 AbstractCegarLoop]: Abstraction has 4656 states and 5877 transitions. [2021-11-07 13:02:08,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 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) [2021-11-07 13:02:08,979 INFO L276 IsEmpty]: Start isEmpty. Operand 4656 states and 5877 transitions. [2021-11-07 13:02:08,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1110 [2021-11-07 13:02:08,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:02:08,987 INFO L514 BasicCegarLoop]: trace histogram [256, 256, 256, 256, 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] [2021-11-07 13:02:08,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 13:02:08,988 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:02:08,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:02:08,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1454565699, now seen corresponding path program 1 times [2021-11-07 13:02:08,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:02:08,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985548567] [2021-11-07 13:02:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:02:08,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:02:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:02:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 130828 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 130821 trivial. 0 not checked. [2021-11-07 13:02:24,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:02:24,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985548567] [2021-11-07 13:02:24,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985548567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:02:24,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:02:24,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:02:24,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550905957] [2021-11-07 13:02:24,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:02:24,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:02:24,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:02:24,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:02:24,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:02:24,876 INFO L87 Difference]: Start difference. First operand 4656 states and 5877 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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) [2021-11-07 13:02:25,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:02:25,763 INFO L93 Difference]: Finished difference Result 13666 states and 17251 transitions. [2021-11-07 13:02:25,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 13:02:25,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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 1109 [2021-11-07 13:02:25,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:02:25,781 INFO L225 Difference]: With dead ends: 13666 [2021-11-07 13:02:25,782 INFO L226 Difference]: Without dead ends: 9034 [2021-11-07 13:02:25,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.94ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:02:25,789 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 113 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.41ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.96ms IncrementalHoareTripleChecker+Time [2021-11-07 13:02:25,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 639 Invalid, 9 Unknown, 0 Unchecked, 0.41ms Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 19.96ms Time] [2021-11-07 13:02:25,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9034 states. [2021-11-07 13:02:26,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9034 to 4660. [2021-11-07 13:02:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4660 states, 4659 states have (on average 1.2622880446447735) internal successors, (5881), 4659 states have internal predecessors, (5881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:02:26,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4660 states to 4660 states and 5881 transitions. [2021-11-07 13:02:26,326 INFO L78 Accepts]: Start accepts. Automaton has 4660 states and 5881 transitions. Word has length 1109 [2021-11-07 13:02:26,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:02:26,327 INFO L470 AbstractCegarLoop]: Abstraction has 4660 states and 5881 transitions. [2021-11-07 13:02:26,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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) [2021-11-07 13:02:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 4660 states and 5881 transitions. [2021-11-07 13:02:26,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1111 [2021-11-07 13:02:26,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:02:26,337 INFO L514 BasicCegarLoop]: trace histogram [256, 256, 256, 256, 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] [2021-11-07 13:02:26,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 13:02:26,337 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:02:26,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:02:26,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1981019934, now seen corresponding path program 1 times [2021-11-07 13:02:26,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:02:26,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004092323] [2021-11-07 13:02:26,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:02:26,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:02:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:02:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 130829 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 130821 trivial. 0 not checked. [2021-11-07 13:02:40,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:02:40,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004092323] [2021-11-07 13:02:40,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004092323] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:02:40,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637542641] [2021-11-07 13:02:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:02:40,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:02:40,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:02:40,315 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:02:40,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 13:02:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:02:41,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 3797 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 13:02:41,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:02:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 130829 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 130821 trivial. 0 not checked. [2021-11-07 13:02:42,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:02:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 130829 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 130821 trivial. 0 not checked. [2021-11-07 13:02:43,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637542641] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 13:02:43,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-07 13:02:43,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 9 [2021-11-07 13:02:43,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858235901] [2021-11-07 13:02:43,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:02:43,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:02:43,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:02:43,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:02:43,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-07 13:02:43,362 INFO L87 Difference]: Start difference. First operand 4660 states and 5881 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:02:43,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:02:43,917 INFO L93 Difference]: Finished difference Result 10455 states and 13192 transitions. [2021-11-07 13:02:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 13:02:43,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 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 1110 [2021-11-07 13:02:43,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:02:43,926 INFO L225 Difference]: With dead ends: 10455 [2021-11-07 13:02:43,927 INFO L226 Difference]: Without dead ends: 5819 [2021-11-07 13:02:43,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2224 GetRequests, 2217 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.43ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-07 13:02:43,933 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 156 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.46ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.89ms IncrementalHoareTripleChecker+Time [2021-11-07 13:02:43,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 720 Invalid, 13 Unknown, 0 Unchecked, 0.46ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 24.89ms Time] [2021-11-07 13:02:43,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5819 states. [2021-11-07 13:02:44,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5819 to 4664. [2021-11-07 13:02:44,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4664 states, 4663 states have (on average 1.2620630495389233) internal successors, (5885), 4663 states have internal predecessors, (5885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:02:44,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4664 states to 4664 states and 5885 transitions. [2021-11-07 13:02:44,351 INFO L78 Accepts]: Start accepts. Automaton has 4664 states and 5885 transitions. Word has length 1110 [2021-11-07 13:02:44,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:02:44,352 INFO L470 AbstractCegarLoop]: Abstraction has 4664 states and 5885 transitions. [2021-11-07 13:02:44,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:02:44,352 INFO L276 IsEmpty]: Start isEmpty. Operand 4664 states and 5885 transitions. [2021-11-07 13:02:44,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1112 [2021-11-07 13:02:44,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:02:44,361 INFO L514 BasicCegarLoop]: trace histogram [256, 256, 256, 256, 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] [2021-11-07 13:02:44,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 13:02:44,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 13:02:44,562 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:02:44,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:02:44,563 INFO L85 PathProgramCache]: Analyzing trace with hash -2067976475, now seen corresponding path program 1 times [2021-11-07 13:02:44,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:02:44,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288417734] [2021-11-07 13:02:44,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:02:44,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:02:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:02:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 130830 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 130822 trivial. 0 not checked. [2021-11-07 13:02:58,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:02:58,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288417734] [2021-11-07 13:02:58,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288417734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:02:58,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020380344] [2021-11-07 13:02:58,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:02:58,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:02:58,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:02:58,549 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:02:58,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 13:09:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:09:06,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 3807 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 13:09:06,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:09:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 130830 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 130822 trivial. 0 not checked. [2021-11-07 13:09:07,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:09:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 130830 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 130822 trivial. 0 not checked. [2021-11-07 13:09:08,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020380344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:09:08,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 13:09:08,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-07 13:09:08,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655409690] [2021-11-07 13:09:08,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-07 13:09:08,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 13:09:08,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:09:08,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 13:09:08,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 13:09:08,564 INFO L87 Difference]: Start difference. First operand 4664 states and 5885 transitions. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:09:09,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:09:09,484 INFO L93 Difference]: Finished difference Result 13690 states and 17283 transitions. [2021-11-07 13:09:09,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 13:09:09,484 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 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 1111 [2021-11-07 13:09:09,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:09:09,496 INFO L225 Difference]: With dead ends: 13690 [2021-11-07 13:09:09,497 INFO L226 Difference]: Without dead ends: 9050 [2021-11-07 13:09:09,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2230 GetRequests, 2219 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 50.10ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-07 13:09:09,504 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 226 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.82ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.01ms IncrementalHoareTripleChecker+Time [2021-11-07 13:09:09,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 1380 Invalid, 34 Unknown, 0 Unchecked, 0.82ms Time], IncrementalHoareTripleChecker [11 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 64.01ms Time] [2021-11-07 13:09:09,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9050 states. [2021-11-07 13:09:09,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9050 to 4676. [2021-11-07 13:09:09,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4676 states, 4675 states have (on average 1.2613903743315509) internal successors, (5897), 4675 states have internal predecessors, (5897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:09:09,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4676 states to 4676 states and 5897 transitions. [2021-11-07 13:09:09,946 INFO L78 Accepts]: Start accepts. Automaton has 4676 states and 5897 transitions. Word has length 1111 [2021-11-07 13:09:09,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:09:09,947 INFO L470 AbstractCegarLoop]: Abstraction has 4676 states and 5897 transitions. [2021-11-07 13:09:09,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:09:09,947 INFO L276 IsEmpty]: Start isEmpty. Operand 4676 states and 5897 transitions. [2021-11-07 13:09:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1115 [2021-11-07 13:09:09,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:09:09,956 INFO L514 BasicCegarLoop]: trace histogram [256, 256, 256, 256, 4, 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] [2021-11-07 13:09:10,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-07 13:09:10,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-07 13:09:10,183 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:09:10,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:09:10,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1594221284, now seen corresponding path program 2 times [2021-11-07 13:09:10,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:09:10,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524215213] [2021-11-07 13:09:10,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:09:10,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:09:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:09:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 130839 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 130822 trivial. 0 not checked. [2021-11-07 13:09:11,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:09:11,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524215213] [2021-11-07 13:09:11,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524215213] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:09:11,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720400145] [2021-11-07 13:09:11,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 13:09:11,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:09:11,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:09:11,493 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:09:11,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 13:12:44,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 13:12:44,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 13:12:44,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 3891 conjuncts, 166 conjunts are in the unsatisfiable core [2021-11-07 13:12:44,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:12:45,176 INFO L354 Elim1Store]: treesize reduction 892, result has 7.4 percent of original size [2021-11-07 13:12:45,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 9 case distinctions, treesize of input 33 treesize of output 76 [2021-11-07 13:12:45,963 INFO L354 Elim1Store]: treesize reduction 424, result has 21.9 percent of original size [2021-11-07 13:12:45,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 85 treesize of output 182 [2021-11-07 13:12:54,455 WARN L228 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-07 13:12:54,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-07 13:12:54,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 13:12:54,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-07 13:12:54,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181179333] [2021-11-07 13:12:54,457 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-07 13:12:54,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 13:12:54,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:12:54,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 13:12:54,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-07 13:12:54,458 INFO L87 Difference]: Start difference. First operand 4676 states and 5897 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:12:54,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-11-07 13:12:54,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 13:12:54,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 54.87ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-07 13:12:54,597 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.19ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-07 13:12:54,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 339 Invalid, 1 Unknown, 0 Unchecked, 0.19ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-07 13:12:54,799 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forcibly destroying the process [2021-11-07 13:12:54,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 137 [2021-11-07 13:12:54,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 13:12:54,864 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@31821d64 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-07 13:12:54,868 INFO L158 Benchmark]: Toolchain (without parser) took 733568.62ms. Allocated memory was 88.1MB in the beginning and 5.1GB in the end (delta: 5.1GB). Free memory was 47.5MB in the beginning and 2.7GB in the end (delta: -2.7GB). Peak memory consumption was 2.4GB. Max. memory is 16.1GB. [2021-11-07 13:12:54,868 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 88.1MB. Free memory is still 46.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-07 13:12:54,868 INFO L158 Benchmark]: CACSL2BoogieTranslator took 790.46ms. Allocated memory was 88.1MB in the beginning and 117.4MB in the end (delta: 29.4MB). Free memory was 47.4MB in the beginning and 51.7MB in the end (delta: -4.3MB). Peak memory consumption was 28.3MB. Max. memory is 16.1GB. [2021-11-07 13:12:54,868 INFO L158 Benchmark]: Boogie Procedure Inliner took 87.66ms. Allocated memory is still 117.4MB. Free memory was 51.7MB in the beginning and 78.4MB in the end (delta: -26.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-07 13:12:54,868 INFO L158 Benchmark]: Boogie Preprocessor took 84.94ms. Allocated memory is still 117.4MB. Free memory was 78.4MB in the beginning and 73.7MB in the end (delta: 4.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-07 13:12:54,868 INFO L158 Benchmark]: RCFGBuilder took 885.92ms. Allocated memory is still 117.4MB. Free memory was 73.7MB in the beginning and 56.9MB in the end (delta: 16.8MB). Peak memory consumption was 32.4MB. Max. memory is 16.1GB. [2021-11-07 13:12:54,868 INFO L158 Benchmark]: TraceAbstraction took 731715.06ms. Allocated memory was 117.4MB in the beginning and 5.1GB in the end (delta: 5.0GB). Free memory was 56.4MB in the beginning and 2.7GB in the end (delta: -2.6GB). Peak memory consumption was 2.4GB. Max. memory is 16.1GB. [2021-11-07 13:12:54,869 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 88.1MB. Free memory is still 46.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 790.46ms. Allocated memory was 88.1MB in the beginning and 117.4MB in the end (delta: 29.4MB). Free memory was 47.4MB in the beginning and 51.7MB in the end (delta: -4.3MB). Peak memory consumption was 28.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 87.66ms. Allocated memory is still 117.4MB. Free memory was 51.7MB in the beginning and 78.4MB in the end (delta: -26.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 84.94ms. Allocated memory is still 117.4MB. Free memory was 78.4MB in the beginning and 73.7MB in the end (delta: 4.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 885.92ms. Allocated memory is still 117.4MB. Free memory was 73.7MB in the beginning and 56.9MB in the end (delta: 16.8MB). Peak memory consumption was 32.4MB. Max. memory is 16.1GB. * TraceAbstraction took 731715.06ms. Allocated memory was 117.4MB in the beginning and 5.1GB in the end (delta: 5.0GB). Free memory was 56.4MB in the beginning and 2.7GB in the end (delta: -2.6GB). Peak memory consumption was 2.4GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@31821d64 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@31821d64: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash cb4cf2f7b619bb65636b8158cc0f6ae5cf90699f1f1c19bf802021a20c422d2c --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5b36d44 [2021-11-07 13:12:56,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 13:12:56,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 13:12:56,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 13:12:56,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 13:12:56,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 13:12:56,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 13:12:56,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 13:12:56,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 13:12:56,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 13:12:56,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 13:12:56,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 13:12:56,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 13:12:56,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 13:12:56,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 13:12:56,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 13:12:56,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 13:12:56,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 13:12:56,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 13:12:56,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 13:12:56,668 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 13:12:56,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 13:12:56,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 13:12:56,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 13:12:56,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 13:12:56,672 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 13:12:56,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 13:12:56,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 13:12:56,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 13:12:56,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 13:12:56,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 13:12:56,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 13:12:56,675 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 13:12:56,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 13:12:56,676 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 13:12:56,676 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 13:12:56,677 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 13:12:56,677 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 13:12:56,677 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 13:12:56,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 13:12:56,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 13:12:56,680 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-07 13:12:56,719 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 13:12:56,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 13:12:56,721 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 13:12:56,721 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 13:12:56,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 13:12:56,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 13:12:56,722 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 13:12:56,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 13:12:56,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 13:12:56,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 13:12:56,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 13:12:56,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 13:12:56,724 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 13:12:56,724 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 13:12:56,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 13:12:56,724 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 13:12:56,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 13:12:56,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 13:12:56,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 13:12:56,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 13:12:56,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 13:12:56,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 13:12:56,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 13:12:56,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 13:12:56,733 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-07 13:12:56,733 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 13:12:56,733 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 13:12:56,733 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 13:12:56,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 13:12:56,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 13:12:56,734 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 13:12:56,734 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb4cf2f7b619bb65636b8158cc0f6ae5cf90699f1f1c19bf802021a20c422d2c [2021-11-07 13:12:56,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 13:12:57,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 13:12:57,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 13:12:57,016 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 13:12:57,017 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 13:12:57,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-11-07 13:12:57,093 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08b52e92b/12f29b6a9ced4834a04bafc8dcf3bcb6/FLAGf6178d931 [2021-11-07 13:12:57,709 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 13:12:57,710 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-11-07 13:12:57,743 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08b52e92b/12f29b6a9ced4834a04bafc8dcf3bcb6/FLAGf6178d931 [2021-11-07 13:12:57,928 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08b52e92b/12f29b6a9ced4834a04bafc8dcf3bcb6 [2021-11-07 13:12:57,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 13:12:57,933 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 13:12:57,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 13:12:57,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 13:12:57,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 13:12:57,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:12:57" (1/1) ... [2021-11-07 13:12:57,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5edd6c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:57, skipping insertion in model container [2021-11-07 13:12:57,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:12:57" (1/1) ... [2021-11-07 13:12:57,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 13:12:58,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 13:12:58,571 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_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i[153287,153300] [2021-11-07 13:12:58,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 13:12:58,776 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 13:12:58,874 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_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i[153287,153300] [2021-11-07 13:12:58,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 13:12:58,954 INFO L208 MainTranslator]: Completed translation [2021-11-07 13:12:58,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58 WrapperNode [2021-11-07 13:12:58,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 13:12:58,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 13:12:58,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 13:12:58,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 13:12:58,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (1/1) ... [2021-11-07 13:12:58,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (1/1) ... [2021-11-07 13:12:59,071 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 13:12:59,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 13:12:59,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 13:12:59,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 13:12:59,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (1/1) ... [2021-11-07 13:12:59,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (1/1) ... [2021-11-07 13:12:59,097 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (1/1) ... [2021-11-07 13:12:59,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (1/1) ... [2021-11-07 13:12:59,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (1/1) ... [2021-11-07 13:12:59,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (1/1) ... [2021-11-07 13:12:59,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (1/1) ... [2021-11-07 13:12:59,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 13:12:59,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 13:12:59,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 13:12:59,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 13:12:59,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (1/1) ... [2021-11-07 13:12:59,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 13:12:59,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:12:59,170 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 13:12:59,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 13:12:59,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 13:12:59,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 13:12:59,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 13:12:59,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 13:12:59,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 13:12:59,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 13:12:59,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 13:12:59,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 13:12:59,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 13:12:59,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 13:12:59,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 13:12:59,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 13:12:59,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 13:12:59,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 13:12:59,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 13:12:59,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 13:12:59,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 13:12:59,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 13:12:59,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 13:12:59,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 13:12:59,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 13:12:59,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 13:12:59,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 13:12:59,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 13:12:59,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 13:12:59,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 13:12:59,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 13:13:00,700 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 13:13:00,700 INFO L299 CfgBuilder]: Removed 109 assume(true) statements. [2021-11-07 13:13:00,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:13:00 BoogieIcfgContainer [2021-11-07 13:13:00,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 13:13:00,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 13:13:00,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 13:13:00,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 13:13:00,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:12:57" (1/3) ... [2021-11-07 13:13:00,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f67feba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:13:00, skipping insertion in model container [2021-11-07 13:13:00,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:58" (2/3) ... [2021-11-07 13:13:00,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f67feba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:13:00, skipping insertion in model container [2021-11-07 13:13:00,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:13:00" (3/3) ... [2021-11-07 13:13:00,710 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-11-07 13:13:00,715 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 13:13:00,715 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 13:13:00,757 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 13:13:00,762 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 13:13:00,762 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 13:13:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand has 136 states, 134 states have (on average 1.507462686567164) internal successors, (202), 135 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:00,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 13:13:00,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:00,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:13:00,782 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:00,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:00,786 INFO L85 PathProgramCache]: Analyzing trace with hash -695882203, now seen corresponding path program 1 times [2021-11-07 13:13:00,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:13:00,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20023293] [2021-11-07 13:13:00,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:00,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:13:00,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:13:00,801 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:13:00,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 13:13:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:00,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 13:13:00,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:13:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:13:01,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:13:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:13:01,133 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:13:01,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20023293] [2021-11-07 13:13:01,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20023293] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:01,134 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:13:01,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 13:13:01,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346414106] [2021-11-07 13:13:01,136 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:01,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:13:01,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:13:01,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:13:01,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:13:01,163 INFO L87 Difference]: Start difference. First operand has 136 states, 134 states have (on average 1.507462686567164) internal successors, (202), 135 states have internal predecessors, (202), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:01,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:01,227 INFO L93 Difference]: Finished difference Result 268 states and 399 transitions. [2021-11-07 13:13:01,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:13:01,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 13:13:01,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:01,237 INFO L225 Difference]: With dead ends: 268 [2021-11-07 13:13:01,238 INFO L226 Difference]: Without dead ends: 130 [2021-11-07 13:13:01,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.22ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:13:01,243 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 0 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.64ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.37ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:01,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 557 Invalid, 5 Unknown, 0 Unchecked, 7.64ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 14.37ms Time] [2021-11-07 13:13:01,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-07 13:13:01,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-07 13:13:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.3875968992248062) internal successors, (179), 129 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:01,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 179 transitions. [2021-11-07 13:13:01,283 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 179 transitions. Word has length 18 [2021-11-07 13:13:01,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:01,283 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 179 transitions. [2021-11-07 13:13:01,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 179 transitions. [2021-11-07 13:13:01,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 13:13:01,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:01,285 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:13:01,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 13:13:01,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:13:01,494 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:01,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:01,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1963993750, now seen corresponding path program 1 times [2021-11-07 13:13:01,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:13:01,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820647295] [2021-11-07 13:13:01,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:01,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:13:01,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:13:01,497 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:13:01,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 13:13:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:01,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 13:13:01,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:13:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 13:13:01,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:13:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 13:13:01,752 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:13:01,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820647295] [2021-11-07 13:13:01,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820647295] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:01,754 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:13:01,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 13:13:01,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643600300] [2021-11-07 13:13:01,754 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:01,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:13:01,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:13:01,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:13:01,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:13:01,758 INFO L87 Difference]: Start difference. First operand 130 states and 179 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2021-11-07 13:13:01,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:01,841 INFO L93 Difference]: Finished difference Result 438 states and 617 transitions. [2021-11-07 13:13:01,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 13:13:01,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 19 [2021-11-07 13:13:01,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:01,843 INFO L225 Difference]: With dead ends: 438 [2021-11-07 13:13:01,843 INFO L226 Difference]: Without dead ends: 319 [2021-11-07 13:13:01,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.08ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:13:01,844 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 419 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.80ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.58ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:01,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 460 Invalid, 27 Unknown, 0 Unchecked, 1.80ms Time], IncrementalHoareTripleChecker [9 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 64.58ms Time] [2021-11-07 13:13:01,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-07 13:13:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2021-11-07 13:13:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.4056603773584906) internal successors, (447), 318 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 447 transitions. [2021-11-07 13:13:01,859 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 447 transitions. Word has length 19 [2021-11-07 13:13:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:01,860 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 447 transitions. [2021-11-07 13:13:01,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2021-11-07 13:13:01,860 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 447 transitions. [2021-11-07 13:13:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 13:13:01,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:01,861 INFO L514 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] [2021-11-07 13:13:01,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 13:13:02,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:13:02,070 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:02,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:02,070 INFO L85 PathProgramCache]: Analyzing trace with hash 717727145, now seen corresponding path program 1 times [2021-11-07 13:13:02,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:13:02,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369551299] [2021-11-07 13:13:02,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:02,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:13:02,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:13:02,073 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:13:02,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 13:13:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:02,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 13:13:02,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:13:02,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 13:13:02,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:13:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 13:13:02,308 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:13:02,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369551299] [2021-11-07 13:13:02,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369551299] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:02,308 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:13:02,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 13:13:02,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320074971] [2021-11-07 13:13:02,309 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:02,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:13:02,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:13:02,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:13:02,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:13:02,310 INFO L87 Difference]: Start difference. First operand 319 states and 447 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:02,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:02,352 INFO L93 Difference]: Finished difference Result 632 states and 889 transitions. [2021-11-07 13:13:02,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 13:13:02,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 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 25 [2021-11-07 13:13:02,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:02,354 INFO L225 Difference]: With dead ends: 632 [2021-11-07 13:13:02,354 INFO L226 Difference]: Without dead ends: 324 [2021-11-07 13:13:02,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.49ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:13:02,355 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 12 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.76ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.86ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:02,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 346 Invalid, 12 Unknown, 0 Unchecked, 0.76ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 31.86ms Time] [2021-11-07 13:13:02,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-07 13:13:02,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2021-11-07 13:13:02,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.4024767801857585) internal successors, (453), 323 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:02,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 453 transitions. [2021-11-07 13:13:02,375 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 453 transitions. Word has length 25 [2021-11-07 13:13:02,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:02,376 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 453 transitions. [2021-11-07 13:13:02,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:02,376 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 453 transitions. [2021-11-07 13:13:02,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 13:13:02,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:02,377 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-07 13:13:02,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 13:13:02,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:13:02,586 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:02,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:02,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1524412699, now seen corresponding path program 1 times [2021-11-07 13:13:02,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:13:02,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59899662] [2021-11-07 13:13:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:02,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:13:02,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:13:02,589 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:13:02,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 13:13:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:02,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 13:13:02,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:13:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 13:13:02,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:13:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 13:13:02,955 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:13:02,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59899662] [2021-11-07 13:13:02,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59899662] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:13:02,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 13:13:02,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-07 13:13:02,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314386264] [2021-11-07 13:13:02,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 13:13:02,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 13:13:02,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:13:02,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 13:13:02,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 13:13:02,957 INFO L87 Difference]: Start difference. First operand 324 states and 453 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:03,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:03,093 INFO L93 Difference]: Finished difference Result 653 states and 917 transitions. [2021-11-07 13:13:03,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 13:13:03,094 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 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 33 [2021-11-07 13:13:03,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:03,095 INFO L225 Difference]: With dead ends: 653 [2021-11-07 13:13:03,095 INFO L226 Difference]: Without dead ends: 340 [2021-11-07 13:13:03,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 65.89ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-07 13:13:03,096 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 38 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.31ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.56ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:03,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 697 Invalid, 57 Unknown, 0 Unchecked, 1.31ms Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 93.56ms Time] [2021-11-07 13:13:03,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-07 13:13:03,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2021-11-07 13:13:03,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.3952802359882006) internal successors, (473), 339 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 473 transitions. [2021-11-07 13:13:03,106 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 473 transitions. Word has length 33 [2021-11-07 13:13:03,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:03,106 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 473 transitions. [2021-11-07 13:13:03,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:03,107 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 473 transitions. [2021-11-07 13:13:03,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 13:13:03,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:03,108 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:13:03,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 13:13:03,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:13:03,317 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:03,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:03,317 INFO L85 PathProgramCache]: Analyzing trace with hash 997462527, now seen corresponding path program 2 times [2021-11-07 13:13:03,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:13:03,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786096834] [2021-11-07 13:13:03,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 13:13:03,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:13:03,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:13:03,319 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:13:03,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 13:13:03,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 13:13:03,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 13:13:03,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 13:13:03,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:13:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-07 13:13:03,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:13:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-07 13:13:03,620 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:13:03,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786096834] [2021-11-07 13:13:03,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786096834] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:03,621 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:13:03,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 13:13:03,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670267151] [2021-11-07 13:13:03,621 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:03,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:13:03,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:13:03,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:13:03,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:13:03,624 INFO L87 Difference]: Start difference. First operand 340 states and 473 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:03,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:03,681 INFO L93 Difference]: Finished difference Result 668 states and 931 transitions. [2021-11-07 13:13:03,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 13:13:03,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 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 49 [2021-11-07 13:13:03,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:03,683 INFO L225 Difference]: With dead ends: 668 [2021-11-07 13:13:03,683 INFO L226 Difference]: Without dead ends: 339 [2021-11-07 13:13:03,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.24ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:13:03,685 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 327 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.55ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.73ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:03,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 456 Invalid, 8 Unknown, 0 Unchecked, 1.55ms Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 26.73ms Time] [2021-11-07 13:13:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-07 13:13:03,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2021-11-07 13:13:03,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.3875739644970415) internal successors, (469), 338 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:03,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 469 transitions. [2021-11-07 13:13:03,697 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 469 transitions. Word has length 49 [2021-11-07 13:13:03,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:03,698 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 469 transitions. [2021-11-07 13:13:03,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:03,698 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 469 transitions. [2021-11-07 13:13:03,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 13:13:03,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:03,704 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2021-11-07 13:13:03,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 13:13:03,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:13:03,915 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:03,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:03,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1345023994, now seen corresponding path program 1 times [2021-11-07 13:13:03,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:13:03,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721212223] [2021-11-07 13:13:03,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:03,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:13:03,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:13:03,917 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:13:03,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 13:13:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:04,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 13:13:04,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:13:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 13:13:04,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:13:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 13:13:04,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:13:04,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721212223] [2021-11-07 13:13:04,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721212223] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:13:04,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 13:13:04,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-07 13:13:04,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394756536] [2021-11-07 13:13:04,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 13:13:04,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 13:13:04,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:13:04,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 13:13:04,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-07 13:13:04,550 INFO L87 Difference]: Start difference. First operand 339 states and 469 transitions. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:05,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:05,153 INFO L93 Difference]: Finished difference Result 605 states and 841 transitions. [2021-11-07 13:13:05,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 13:13:05,154 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 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 60 [2021-11-07 13:13:05,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:05,155 INFO L225 Difference]: With dead ends: 605 [2021-11-07 13:13:05,155 INFO L226 Difference]: Without dead ends: 371 [2021-11-07 13:13:05,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 350.51ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-07 13:13:05,156 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 92 mSDsluCounter, 1400 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 312.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.96ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 382.67ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:05,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 1578 Invalid, 250 Unknown, 0 Unchecked, 2.96ms Time], IncrementalHoareTripleChecker [14 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 382.67ms Time] [2021-11-07 13:13:05,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-11-07 13:13:05,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2021-11-07 13:13:05,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.3756756756756756) internal successors, (509), 370 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:05,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 509 transitions. [2021-11-07 13:13:05,166 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 509 transitions. Word has length 60 [2021-11-07 13:13:05,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:05,166 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 509 transitions. [2021-11-07 13:13:05,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:05,166 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 509 transitions. [2021-11-07 13:13:05,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 13:13:05,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:05,167 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 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] [2021-11-07 13:13:05,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 13:13:05,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:13:05,378 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:05,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:05,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1897514690, now seen corresponding path program 2 times [2021-11-07 13:13:05,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:13:05,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693922967] [2021-11-07 13:13:05,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 13:13:05,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:13:05,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:13:05,381 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:13:05,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 13:13:05,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 13:13:05,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 13:13:05,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 13:13:05,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:13:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2021-11-07 13:13:05,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:13:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2021-11-07 13:13:05,908 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:13:05,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693922967] [2021-11-07 13:13:05,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693922967] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:05,908 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:13:05,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-07 13:13:05,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602435886] [2021-11-07 13:13:05,908 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:05,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 13:13:05,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:13:05,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 13:13:05,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:13:05,909 INFO L87 Difference]: Start difference. First operand 371 states and 509 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:06,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:06,004 INFO L93 Difference]: Finished difference Result 1089 states and 1500 transitions. [2021-11-07 13:13:06,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:13:06,005 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 92 [2021-11-07 13:13:06,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:06,007 INFO L225 Difference]: With dead ends: 1089 [2021-11-07 13:13:06,007 INFO L226 Difference]: Without dead ends: 725 [2021-11-07 13:13:06,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.78ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 13:13:06,009 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 142 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.30ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.82ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:06,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 821 Invalid, 53 Unknown, 0 Unchecked, 1.30ms Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 62.82ms Time] [2021-11-07 13:13:06,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-11-07 13:13:06,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 713. [2021-11-07 13:13:06,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.377808988764045) internal successors, (981), 712 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:06,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 981 transitions. [2021-11-07 13:13:06,027 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 981 transitions. Word has length 92 [2021-11-07 13:13:06,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:06,027 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 981 transitions. [2021-11-07 13:13:06,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 981 transitions. [2021-11-07 13:13:06,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 13:13:06,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:06,029 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 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] [2021-11-07 13:13:06,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 13:13:06,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:13:06,237 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:06,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:06,238 INFO L85 PathProgramCache]: Analyzing trace with hash 970193347, now seen corresponding path program 1 times [2021-11-07 13:13:06,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:13:06,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270870585] [2021-11-07 13:13:06,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:06,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:13:06,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:13:06,239 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:13:06,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 13:13:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:06,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 13:13:06,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:13:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2021-11-07 13:13:06,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:13:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2021-11-07 13:13:06,840 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:13:06,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270870585] [2021-11-07 13:13:06,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270870585] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:06,841 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:13:06,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 13:13:06,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143589859] [2021-11-07 13:13:06,841 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:06,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:13:06,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:13:06,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:13:06,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:13:06,842 INFO L87 Difference]: Start difference. First operand 713 states and 981 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:06,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:06,888 INFO L93 Difference]: Finished difference Result 1424 states and 1949 transitions. [2021-11-07 13:13:06,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:13:06,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 117 [2021-11-07 13:13:06,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:06,891 INFO L225 Difference]: With dead ends: 1424 [2021-11-07 13:13:06,891 INFO L226 Difference]: Without dead ends: 722 [2021-11-07 13:13:06,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.70ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:13:06,892 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 43 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.50ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.56ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:06,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 335 Invalid, 14 Unknown, 0 Unchecked, 0.50ms Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 27.56ms Time] [2021-11-07 13:13:06,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-11-07 13:13:06,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 581. [2021-11-07 13:13:06,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 1.3758620689655172) internal successors, (798), 580 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:06,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 798 transitions. [2021-11-07 13:13:06,908 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 798 transitions. Word has length 117 [2021-11-07 13:13:06,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:06,908 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 798 transitions. [2021-11-07 13:13:06,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:06,908 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 798 transitions. [2021-11-07 13:13:06,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 13:13:06,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:06,909 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 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] [2021-11-07 13:13:06,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 13:13:07,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:13:07,122 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:07,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:07,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1735419593, now seen corresponding path program 2 times [2021-11-07 13:13:07,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:13:07,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113120176] [2021-11-07 13:13:07,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 13:13:07,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:13:07,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:13:07,125 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:13:07,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 13:13:07,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 13:13:07,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 13:13:07,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 13:13:07,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:13:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 7 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:13:07,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:13:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 7 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:13:08,606 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:13:08,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113120176] [2021-11-07 13:13:08,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113120176] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:13:08,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 13:13:08,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-11-07 13:13:08,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948392614] [2021-11-07 13:13:08,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 13:13:08,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 13:13:08,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:13:08,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 13:13:08,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-11-07 13:13:08,608 INFO L87 Difference]: Start difference. First operand 581 states and 798 transitions. Second operand has 32 states, 32 states have (on average 5.4375) internal successors, (174), 32 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:11,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:11,218 INFO L93 Difference]: Finished difference Result 1266 states and 1758 transitions. [2021-11-07 13:13:11,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 13:13:11,218 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.4375) internal successors, (174), 32 states have internal predecessors, (174), 0 states have call successors, (0), 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 117 [2021-11-07 13:13:11,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:11,221 INFO L225 Difference]: With dead ends: 1266 [2021-11-07 13:13:11,221 INFO L226 Difference]: Without dead ends: 709 [2021-11-07 13:13:11,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1737.19ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 13:13:11,223 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 315 mSDsluCounter, 3604 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1164.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 3790 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.34ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1370.81ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:11,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 3790 Invalid, 1022 Unknown, 0 Unchecked, 6.34ms Time], IncrementalHoareTripleChecker [30 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 1370.81ms Time] [2021-11-07 13:13:11,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-11-07 13:13:11,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 709. [2021-11-07 13:13:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 1.3531073446327684) internal successors, (958), 708 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 958 transitions. [2021-11-07 13:13:11,248 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 958 transitions. Word has length 117 [2021-11-07 13:13:11,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:11,249 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 958 transitions. [2021-11-07 13:13:11,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.4375) internal successors, (174), 32 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:11,249 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 958 transitions. [2021-11-07 13:13:11,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-07 13:13:11,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:11,250 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 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] [2021-11-07 13:13:11,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 13:13:11,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:13:11,489 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:11,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:11,490 INFO L85 PathProgramCache]: Analyzing trace with hash 352735833, now seen corresponding path program 3 times [2021-11-07 13:13:11,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:13:11,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108949081] [2021-11-07 13:13:11,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 13:13:11,491 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:13:11,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:13:11,492 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:13:11,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 13:13:11,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 13:13:11,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 13:13:11,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 13:13:11,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:13:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1780 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2021-11-07 13:13:11,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:13:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1780 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2021-11-07 13:13:12,187 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:13:12,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108949081] [2021-11-07 13:13:12,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108949081] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:12,188 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:13:12,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 13:13:12,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474879475] [2021-11-07 13:13:12,188 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:12,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:13:12,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:13:12,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:13:12,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:13:12,189 INFO L87 Difference]: Start difference. First operand 709 states and 958 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:12,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:12,319 INFO L93 Difference]: Finished difference Result 3143 states and 4253 transitions. [2021-11-07 13:13:12,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:13:12,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 181 [2021-11-07 13:13:12,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:12,326 INFO L225 Difference]: With dead ends: 3143 [2021-11-07 13:13:12,326 INFO L226 Difference]: Without dead ends: 2458 [2021-11-07 13:13:12,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.88ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:13:12,328 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 429 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.60ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.88ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:12,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 678 Invalid, 37 Unknown, 0 Unchecked, 1.60ms Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 50.88ms Time] [2021-11-07 13:13:12,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-11-07 13:13:12,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 717. [2021-11-07 13:13:12,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 1.3491620111731844) internal successors, (966), 716 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:12,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 966 transitions. [2021-11-07 13:13:12,365 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 966 transitions. Word has length 181 [2021-11-07 13:13:12,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:12,366 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 966 transitions. [2021-11-07 13:13:12,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:12,366 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 966 transitions. [2021-11-07 13:13:12,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-07 13:13:12,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:12,367 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 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] [2021-11-07 13:13:12,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-07 13:13:12,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:13:12,578 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:12,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:12,578 INFO L85 PathProgramCache]: Analyzing trace with hash -892508046, now seen corresponding path program 1 times [2021-11-07 13:13:12,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:13:12,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955227287] [2021-11-07 13:13:12,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:12,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:13:12,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:13:12,580 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:13:12,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 13:13:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:12,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 13:13:12,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:13:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1780 backedges. 7 proven. 1770 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:13:13,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:13:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1780 backedges. 7 proven. 1770 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:13:15,926 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:13:15,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955227287] [2021-11-07 13:13:15,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955227287] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:13:15,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 13:13:15,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2021-11-07 13:13:15,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062764685] [2021-11-07 13:13:15,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 13:13:15,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-07 13:13:15,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:13:15,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-07 13:13:15,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=2946, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 13:13:15,929 INFO L87 Difference]: Start difference. First operand 717 states and 966 transitions. Second operand has 64 states, 64 states have (on average 4.765625) internal successors, (305), 64 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:29,025 INFO L93 Difference]: Finished difference Result 1666 states and 2286 transitions. [2021-11-07 13:13:29,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-07 13:13:29,027 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 4.765625) internal successors, (305), 64 states have internal predecessors, (305), 0 states have call successors, (0), 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 184 [2021-11-07 13:13:29,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:29,030 INFO L225 Difference]: With dead ends: 1666 [2021-11-07 13:13:29,031 INFO L226 Difference]: Without dead ends: 973 [2021-11-07 13:13:29,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 10657.91ms TimeCoverageRelationStatistics Valid=3006, Invalid=5736, Unknown=0, NotChecked=0, Total=8742 [2021-11-07 13:13:29,033 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 1207 mSDsluCounter, 6368 mSDsCounter, 0 mSdLazyCounter, 4028 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3858.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 6570 SdHoareTripleChecker+Invalid, 4090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.08ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 4028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4456.34ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:29,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1207 Valid, 6570 Invalid, 4090 Unknown, 0 Unchecked, 14.08ms Time], IncrementalHoareTripleChecker [62 Valid, 4028 Invalid, 0 Unknown, 0 Unchecked, 4456.34ms Time] [2021-11-07 13:13:29,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-11-07 13:13:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 973. [2021-11-07 13:13:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 972 states have (on average 1.323045267489712) internal successors, (1286), 972 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:29,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1286 transitions. [2021-11-07 13:13:29,069 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1286 transitions. Word has length 184 [2021-11-07 13:13:29,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:29,070 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 1286 transitions. [2021-11-07 13:13:29,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 4.765625) internal successors, (305), 64 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:29,070 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1286 transitions. [2021-11-07 13:13:29,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-11-07 13:13:29,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:29,073 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 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] [2021-11-07 13:13:29,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 13:13:29,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:13:29,288 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:29,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:29,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1377157806, now seen corresponding path program 2 times [2021-11-07 13:13:29,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:13:29,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598762989] [2021-11-07 13:13:29,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 13:13:29,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:13:29,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:13:29,290 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:13:29,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 13:13:29,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 13:13:29,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 13:13:29,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-07 13:13:29,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:13:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7636 backedges. 7 proven. 7626 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:13:32,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:13:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7636 backedges. 7 proven. 7626 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:13:39,678 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:13:39,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598762989] [2021-11-07 13:13:39,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598762989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:13:39,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 13:13:39,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 128 [2021-11-07 13:13:39,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769990612] [2021-11-07 13:13:39,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 13:13:39,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-11-07 13:13:39,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:13:39,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-11-07 13:13:39,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4222, Invalid=12034, Unknown=0, NotChecked=0, Total=16256 [2021-11-07 13:13:39,684 INFO L87 Difference]: Start difference. First operand 973 states and 1286 transitions. Second operand has 128 states, 128 states have (on average 4.3828125) internal successors, (561), 128 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Killed by 15