./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.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 57ba9a4d546a973620a0029f54a814a104db676a0fd0f250dd5545a7c0f94302 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:55:06,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:55:06,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:55:06,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:55:06,906 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:55:06,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:55:06,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:55:06,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:55:06,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:55:06,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:55:06,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:55:06,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:55:06,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:55:06,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:55:06,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:55:06,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:55:06,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:55:06,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:55:06,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:55:06,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:55:06,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:55:06,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:55:06,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:55:06,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:55:06,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:55:06,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:55:06,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:55:06,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:55:06,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:55:06,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:55:06,943 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:55:06,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:55:06,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:55:06,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:55:06,947 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:55:06,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:55:06,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:55:06,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:55:06,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:55:06,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:55:06,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:55:06,950 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 03:55:06,980 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:55:06,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:55:06,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:55:06,980 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:55:06,981 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:55:06,981 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:55:06,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:55:06,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:55:06,982 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:55:06,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:55:06,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:55:06,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:55:06,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:55:06,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:55:06,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:55:06,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:55:06,984 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:55:06,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:55:06,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:55:06,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:55:06,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:55:06,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:55:06,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:55:06,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:55:06,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:55:06,985 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:55:06,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:55:06,986 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:55:06,986 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:55:06,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:55:06,986 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57ba9a4d546a973620a0029f54a814a104db676a0fd0f250dd5545a7c0f94302 [2021-12-28 03:55:07,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:55:07,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:55:07,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:55:07,287 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:55:07,287 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:55:07,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i [2021-12-28 03:55:07,331 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/439af7bbe/21fb44cd7fda480797d7603679f3db80/FLAG0652da90a [2021-12-28 03:55:07,910 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:55:07,911 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i [2021-12-28 03:55:07,937 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/439af7bbe/21fb44cd7fda480797d7603679f3db80/FLAG0652da90a [2021-12-28 03:55:08,310 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/439af7bbe/21fb44cd7fda480797d7603679f3db80 [2021-12-28 03:55:08,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:55:08,314 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:55:08,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:55:08,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:55:08,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:55:08,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:55:08" (1/1) ... [2021-12-28 03:55:08,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10bedde4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:08, skipping insertion in model container [2021-12-28 03:55:08,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:55:08" (1/1) ... [2021-12-28 03:55:08,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:55:08,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:55:08,863 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i[101600,101613] [2021-12-28 03:55:09,065 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:55:09,095 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:55:09,163 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i[101600,101613] [2021-12-28 03:55:09,230 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:55:09,270 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:55:09,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:09 WrapperNode [2021-12-28 03:55:09,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:55:09,273 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:55:09,273 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:55:09,273 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:55:09,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:09" (1/1) ... [2021-12-28 03:55:09,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:09" (1/1) ... [2021-12-28 03:55:09,414 INFO L137 Inliner]: procedures = 113, calls = 417, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1227 [2021-12-28 03:55:09,414 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:55:09,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:55:09,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:55:09,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:55:09,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:09" (1/1) ... [2021-12-28 03:55:09,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:09" (1/1) ... [2021-12-28 03:55:09,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:09" (1/1) ... [2021-12-28 03:55:09,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:09" (1/1) ... [2021-12-28 03:55:09,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:09" (1/1) ... [2021-12-28 03:55:09,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:09" (1/1) ... [2021-12-28 03:55:09,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:09" (1/1) ... [2021-12-28 03:55:09,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:55:09,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:55:09,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:55:09,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:55:09,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:09" (1/1) ... [2021-12-28 03:55:09,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:55:09,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:55:09,545 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) [2021-12-28 03:55:09,574 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 [2021-12-28 03:55:09,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-28 03:55:09,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-28 03:55:09,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-28 03:55:09,590 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-28 03:55:09,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-28 03:55:09,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:55:09,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-28 03:55:09,590 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-28 03:55:09,590 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-28 03:55:09,590 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-28 03:55:09,590 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-28 03:55:09,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-28 03:55:09,591 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-28 03:55:09,591 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-28 03:55:09,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:55:09,591 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-28 03:55:09,591 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-28 03:55:09,591 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-28 03:55:09,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-28 03:55:09,592 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-28 03:55:09,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-28 03:55:09,592 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 03:55:09,592 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 03:55:09,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 03:55:09,592 INFO L130 BoogieDeclarations]: Found specification of procedure idmouse_resume [2021-12-28 03:55:09,592 INFO L138 BoogieDeclarations]: Found implementation of procedure idmouse_resume [2021-12-28 03:55:09,592 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-12-28 03:55:09,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-12-28 03:55:09,593 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_2 [2021-12-28 03:55:09,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_2 [2021-12-28 03:55:09,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:55:09,593 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-12-28 03:55:09,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-12-28 03:55:09,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 03:55:09,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:55:09,594 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-28 03:55:09,594 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_5 [2021-12-28 03:55:09,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_5 [2021-12-28 03:55:09,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 03:55:09,594 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-12-28 03:55:09,595 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-12-28 03:55:09,595 INFO L130 BoogieDeclarations]: Found specification of procedure idmouse_disconnect [2021-12-28 03:55:09,595 INFO L138 BoogieDeclarations]: Found implementation of procedure idmouse_disconnect [2021-12-28 03:55:09,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:55:09,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 03:55:09,595 INFO L130 BoogieDeclarations]: Found specification of procedure idmouse_delete [2021-12-28 03:55:09,595 INFO L138 BoogieDeclarations]: Found implementation of procedure idmouse_delete [2021-12-28 03:55:09,595 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-28 03:55:09,596 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-28 03:55:09,596 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-12-28 03:55:09,596 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-12-28 03:55:09,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:55:09,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-28 03:55:09,596 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-28 03:55:09,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-28 03:55:09,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:55:09,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:55:09,924 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:55:09,925 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:55:10,007 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-28 03:55:10,114 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-12-28 03:55:10,619 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:55:10,630 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:55:10,630 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 03:55:10,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:55:10 BoogieIcfgContainer [2021-12-28 03:55:10,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:55:10,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:55:10,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:55:10,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:55:10,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:55:08" (1/3) ... [2021-12-28 03:55:10,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66cad9d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:55:10, skipping insertion in model container [2021-12-28 03:55:10,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:09" (2/3) ... [2021-12-28 03:55:10,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66cad9d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:55:10, skipping insertion in model container [2021-12-28 03:55:10,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:55:10" (3/3) ... [2021-12-28 03:55:10,638 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i [2021-12-28 03:55:10,642 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:55:10,642 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:55:10,684 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:55:10,689 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 [2021-12-28 03:55:10,689 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 03:55:10,714 INFO L276 IsEmpty]: Start isEmpty. Operand has 358 states, 256 states have (on average 1.375) internal successors, (352), 271 states have internal predecessors, (352), 82 states have call successors, (82), 20 states have call predecessors, (82), 18 states have return successors, (76), 74 states have call predecessors, (76), 76 states have call successors, (76) [2021-12-28 03:55:10,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-28 03:55:10,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:10,724 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:10,736 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:10,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:10,740 INFO L85 PathProgramCache]: Analyzing trace with hash -536575566, now seen corresponding path program 1 times [2021-12-28 03:55:10,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:10,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237955699] [2021-12-28 03:55:10,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:10,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:11,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:11,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:11,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 03:55:11,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:11,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237955699] [2021-12-28 03:55:11,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237955699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:11,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:11,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:55:11,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426635301] [2021-12-28 03:55:11,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:11,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:55:11,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:11,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:55:11,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:55:11,118 INFO L87 Difference]: Start difference. First operand has 358 states, 256 states have (on average 1.375) internal successors, (352), 271 states have internal predecessors, (352), 82 states have call successors, (82), 20 states have call predecessors, (82), 18 states have return successors, (76), 74 states have call predecessors, (76), 76 states have call successors, (76) Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-28 03:55:11,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:11,805 INFO L93 Difference]: Finished difference Result 1050 states and 1526 transitions. [2021-12-28 03:55:11,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:55:11,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-12-28 03:55:11,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:11,827 INFO L225 Difference]: With dead ends: 1050 [2021-12-28 03:55:11,827 INFO L226 Difference]: Without dead ends: 675 [2021-12-28 03:55:11,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:55:11,845 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 477 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:11,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 1207 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 03:55:11,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-12-28 03:55:11,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 648. [2021-12-28 03:55:11,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 473 states have (on average 1.3488372093023255) internal successors, (638), 482 states have internal predecessors, (638), 140 states have call successors, (140), 35 states have call predecessors, (140), 34 states have return successors, (134), 130 states have call predecessors, (134), 134 states have call successors, (134) [2021-12-28 03:55:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 912 transitions. [2021-12-28 03:55:11,933 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 912 transitions. Word has length 36 [2021-12-28 03:55:11,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:11,933 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 912 transitions. [2021-12-28 03:55:11,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-28 03:55:11,934 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 912 transitions. [2021-12-28 03:55:11,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-28 03:55:11,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:11,936 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:11,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:55:11,937 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:11,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:11,937 INFO L85 PathProgramCache]: Analyzing trace with hash -981122542, now seen corresponding path program 1 times [2021-12-28 03:55:11,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:11,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693719148] [2021-12-28 03:55:11,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:11,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:12,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:12,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:12,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:12,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:12,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 03:55:12,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:12,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693719148] [2021-12-28 03:55:12,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693719148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:12,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:12,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:55:12,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099185855] [2021-12-28 03:55:12,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:12,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:55:12,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:12,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:55:12,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:55:12,101 INFO L87 Difference]: Start difference. First operand 648 states and 912 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 03:55:12,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:12,405 INFO L93 Difference]: Finished difference Result 674 states and 953 transitions. [2021-12-28 03:55:12,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 03:55:12,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2021-12-28 03:55:12,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:12,408 INFO L225 Difference]: With dead ends: 674 [2021-12-28 03:55:12,408 INFO L226 Difference]: Without dead ends: 671 [2021-12-28 03:55:12,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:55:12,409 INFO L933 BasicCegarLoop]: 468 mSDtfsCounter, 445 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:12,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 719 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 03:55:12,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-12-28 03:55:12,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 647. [2021-12-28 03:55:12,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 473 states have (on average 1.346723044397463) internal successors, (637), 481 states have internal predecessors, (637), 139 states have call successors, (139), 35 states have call predecessors, (139), 34 states have return successors, (134), 130 states have call predecessors, (134), 134 states have call successors, (134) [2021-12-28 03:55:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 910 transitions. [2021-12-28 03:55:12,445 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 910 transitions. Word has length 46 [2021-12-28 03:55:12,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:12,446 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 910 transitions. [2021-12-28 03:55:12,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 03:55:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 910 transitions. [2021-12-28 03:55:12,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-28 03:55:12,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:12,448 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:12,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 03:55:12,448 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:12,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:12,449 INFO L85 PathProgramCache]: Analyzing trace with hash -350236783, now seen corresponding path program 1 times [2021-12-28 03:55:12,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:12,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548740249] [2021-12-28 03:55:12,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:12,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:12,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:12,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:12,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:12,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 03:55:12,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:12,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548740249] [2021-12-28 03:55:12,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548740249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:12,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:12,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:55:12,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028916963] [2021-12-28 03:55:12,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:12,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:55:12,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:12,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:55:12,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:55:12,548 INFO L87 Difference]: Start difference. First operand 647 states and 910 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 03:55:12,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:12,841 INFO L93 Difference]: Finished difference Result 673 states and 951 transitions. [2021-12-28 03:55:12,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 03:55:12,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2021-12-28 03:55:12,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:12,844 INFO L225 Difference]: With dead ends: 673 [2021-12-28 03:55:12,844 INFO L226 Difference]: Without dead ends: 670 [2021-12-28 03:55:12,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:55:12,845 INFO L933 BasicCegarLoop]: 466 mSDtfsCounter, 442 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:12,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 716 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 03:55:12,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-12-28 03:55:12,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 646. [2021-12-28 03:55:12,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 473 states have (on average 1.3446088794926003) internal successors, (636), 480 states have internal predecessors, (636), 138 states have call successors, (138), 35 states have call predecessors, (138), 34 states have return successors, (134), 130 states have call predecessors, (134), 134 states have call successors, (134) [2021-12-28 03:55:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 908 transitions. [2021-12-28 03:55:12,883 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 908 transitions. Word has length 47 [2021-12-28 03:55:12,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:12,884 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 908 transitions. [2021-12-28 03:55:12,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 03:55:12,885 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 908 transitions. [2021-12-28 03:55:12,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-28 03:55:12,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:12,889 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:12,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 03:55:12,889 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:12,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:12,892 INFO L85 PathProgramCache]: Analyzing trace with hash 2027357429, now seen corresponding path program 1 times [2021-12-28 03:55:12,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:12,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469781580] [2021-12-28 03:55:12,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:12,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:12,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:12,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:12,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:12,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 03:55:12,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:12,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469781580] [2021-12-28 03:55:12,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469781580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:12,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:12,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:55:12,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426269078] [2021-12-28 03:55:12,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:12,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:55:12,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:12,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:55:12,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:55:12,981 INFO L87 Difference]: Start difference. First operand 646 states and 908 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 03:55:13,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:13,259 INFO L93 Difference]: Finished difference Result 672 states and 949 transitions. [2021-12-28 03:55:13,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 03:55:13,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2021-12-28 03:55:13,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:13,262 INFO L225 Difference]: With dead ends: 672 [2021-12-28 03:55:13,262 INFO L226 Difference]: Without dead ends: 669 [2021-12-28 03:55:13,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:55:13,263 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 439 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:13,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 713 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:55:13,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-12-28 03:55:13,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 645. [2021-12-28 03:55:13,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 473 states have (on average 1.342494714587738) internal successors, (635), 479 states have internal predecessors, (635), 137 states have call successors, (137), 35 states have call predecessors, (137), 34 states have return successors, (134), 130 states have call predecessors, (134), 134 states have call successors, (134) [2021-12-28 03:55:13,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 906 transitions. [2021-12-28 03:55:13,293 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 906 transitions. Word has length 48 [2021-12-28 03:55:13,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:13,293 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 906 transitions. [2021-12-28 03:55:13,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 03:55:13,294 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 906 transitions. [2021-12-28 03:55:13,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-28 03:55:13,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:13,295 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:13,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 03:55:13,295 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:13,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:13,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1576628460, now seen corresponding path program 1 times [2021-12-28 03:55:13,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:13,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126592125] [2021-12-28 03:55:13,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:13,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:13,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:13,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:13,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:13,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:13,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:13,418 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 03:55:13,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:13,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126592125] [2021-12-28 03:55:13,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126592125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:13,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:13,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:55:13,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634966264] [2021-12-28 03:55:13,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:13,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:55:13,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:13,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:55:13,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:55:13,421 INFO L87 Difference]: Start difference. First operand 645 states and 906 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 03:55:13,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:13,992 INFO L93 Difference]: Finished difference Result 1952 states and 2756 transitions. [2021-12-28 03:55:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:55:13,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2021-12-28 03:55:13,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:13,998 INFO L225 Difference]: With dead ends: 1952 [2021-12-28 03:55:13,998 INFO L226 Difference]: Without dead ends: 1318 [2021-12-28 03:55:14,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:55:14,001 INFO L933 BasicCegarLoop]: 639 mSDtfsCounter, 463 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1313 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:14,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 1313 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 03:55:14,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-12-28 03:55:14,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1266. [2021-12-28 03:55:14,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 929 states have (on average 1.3444564047362755) internal successors, (1249), 939 states have internal predecessors, (1249), 268 states have call successors, (268), 69 states have call predecessors, (268), 68 states have return successors, (265), 257 states have call predecessors, (265), 265 states have call successors, (265) [2021-12-28 03:55:14,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1782 transitions. [2021-12-28 03:55:14,047 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1782 transitions. Word has length 49 [2021-12-28 03:55:14,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:14,047 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1782 transitions. [2021-12-28 03:55:14,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 03:55:14,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1782 transitions. [2021-12-28 03:55:14,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-28 03:55:14,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:14,049 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:14,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 03:55:14,050 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:14,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:14,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1631036456, now seen corresponding path program 1 times [2021-12-28 03:55:14,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:14,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353330869] [2021-12-28 03:55:14,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:14,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:14,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:14,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:14,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:14,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 03:55:14,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:14,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353330869] [2021-12-28 03:55:14,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353330869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:14,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:14,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:55:14,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801455430] [2021-12-28 03:55:14,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:14,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:55:14,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:14,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:55:14,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:55:14,138 INFO L87 Difference]: Start difference. First operand 1266 states and 1782 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 03:55:14,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:14,457 INFO L93 Difference]: Finished difference Result 1316 states and 1860 transitions. [2021-12-28 03:55:14,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 03:55:14,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2021-12-28 03:55:14,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:14,462 INFO L225 Difference]: With dead ends: 1316 [2021-12-28 03:55:14,462 INFO L226 Difference]: Without dead ends: 1304 [2021-12-28 03:55:14,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:55:14,463 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 435 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:14,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 712 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 03:55:14,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-12-28 03:55:14,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 1256. [2021-12-28 03:55:14,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 920 states have (on average 1.3434782608695652) internal successors, (1236), 929 states have internal predecessors, (1236), 267 states have call successors, (267), 69 states have call predecessors, (267), 68 states have return successors, (265), 257 states have call predecessors, (265), 265 states have call successors, (265) [2021-12-28 03:55:14,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1768 transitions. [2021-12-28 03:55:14,503 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1768 transitions. Word has length 50 [2021-12-28 03:55:14,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:14,504 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 1768 transitions. [2021-12-28 03:55:14,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 03:55:14,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1768 transitions. [2021-12-28 03:55:14,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-28 03:55:14,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:14,506 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:14,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 03:55:14,507 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:14,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:14,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1468685094, now seen corresponding path program 1 times [2021-12-28 03:55:14,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:14,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139593769] [2021-12-28 03:55:14,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:14,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:14,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:14,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:14,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:14,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 03:55:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:14,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 03:55:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:14,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 03:55:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:14,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:55:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:14,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:55:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:14,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:55:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:14,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 03:55:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:14,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-28 03:55:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-28 03:55:14,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:14,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139593769] [2021-12-28 03:55:14,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139593769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:14,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:14,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:55:14,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891413461] [2021-12-28 03:55:14,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:14,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:55:14,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:14,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:55:14,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:55:14,621 INFO L87 Difference]: Start difference. First operand 1256 states and 1768 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-28 03:55:15,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:15,114 INFO L93 Difference]: Finished difference Result 3199 states and 4459 transitions. [2021-12-28 03:55:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:55:15,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 107 [2021-12-28 03:55:15,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:15,124 INFO L225 Difference]: With dead ends: 3199 [2021-12-28 03:55:15,124 INFO L226 Difference]: Without dead ends: 1954 [2021-12-28 03:55:15,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:55:15,131 INFO L933 BasicCegarLoop]: 494 mSDtfsCounter, 286 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:15,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 1379 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 03:55:15,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2021-12-28 03:55:15,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1841. [2021-12-28 03:55:15,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1357 states have (on average 1.3352984524686808) internal successors, (1812), 1370 states have internal predecessors, (1812), 368 states have call successors, (368), 116 states have call predecessors, (368), 115 states have return successors, (366), 354 states have call predecessors, (366), 366 states have call successors, (366) [2021-12-28 03:55:15,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2546 transitions. [2021-12-28 03:55:15,216 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2546 transitions. Word has length 107 [2021-12-28 03:55:15,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:15,217 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2546 transitions. [2021-12-28 03:55:15,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-28 03:55:15,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2546 transitions. [2021-12-28 03:55:15,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-28 03:55:15,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:15,224 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:15,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 03:55:15,224 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:15,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:15,224 INFO L85 PathProgramCache]: Analyzing trace with hash 188231278, now seen corresponding path program 1 times [2021-12-28 03:55:15,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:15,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527101513] [2021-12-28 03:55:15,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:15,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:15,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:15,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:15,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:15,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:15,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:55:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:15,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:55:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:15,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-28 03:55:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:15,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 03:55:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:15,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 03:55:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:15,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 03:55:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:15,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-28 03:55:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:15,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-28 03:55:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:15,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-28 03:55:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-28 03:55:15,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:15,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527101513] [2021-12-28 03:55:15,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527101513] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:55:15,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297739420] [2021-12-28 03:55:15,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:15,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:15,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:55:15,439 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) [2021-12-28 03:55:15,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 03:55:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:15,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 1298 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:55:15,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:55:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-28 03:55:16,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:55:16,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297739420] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:16,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:55:16,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2021-12-28 03:55:16,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829223022] [2021-12-28 03:55:16,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:16,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:55:16,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:16,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:55:16,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:55:16,048 INFO L87 Difference]: Start difference. First operand 1841 states and 2546 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-28 03:55:16,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:16,453 INFO L93 Difference]: Finished difference Result 5492 states and 7596 transitions. [2021-12-28 03:55:16,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 03:55:16,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 129 [2021-12-28 03:55:16,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:16,476 INFO L225 Difference]: With dead ends: 5492 [2021-12-28 03:55:16,476 INFO L226 Difference]: Without dead ends: 5481 [2021-12-28 03:55:16,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:55:16,480 INFO L933 BasicCegarLoop]: 982 mSDtfsCounter, 836 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 1754 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:16,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 1754 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 03:55:16,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5481 states. [2021-12-28 03:55:16,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5481 to 5433. [2021-12-28 03:55:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5433 states, 3997 states have (on average 1.3400050037528146) internal successors, (5356), 4058 states have internal predecessors, (5356), 1092 states have call successors, (1092), 344 states have call predecessors, (1092), 343 states have return successors, (1090), 1030 states have call predecessors, (1090), 1090 states have call successors, (1090) [2021-12-28 03:55:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5433 states to 5433 states and 7538 transitions. [2021-12-28 03:55:16,712 INFO L78 Accepts]: Start accepts. Automaton has 5433 states and 7538 transitions. Word has length 129 [2021-12-28 03:55:16,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:16,713 INFO L470 AbstractCegarLoop]: Abstraction has 5433 states and 7538 transitions. [2021-12-28 03:55:16,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-28 03:55:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 5433 states and 7538 transitions. [2021-12-28 03:55:16,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-28 03:55:16,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:16,721 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:16,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 03:55:16,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:16,923 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:16,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:16,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1400116624, now seen corresponding path program 1 times [2021-12-28 03:55:16,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:16,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147560877] [2021-12-28 03:55:16,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:16,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:17,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:17,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:17,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:17,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:17,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:55:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:17,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:55:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:17,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-28 03:55:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:17,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 03:55:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:17,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 03:55:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:17,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 03:55:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:17,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-28 03:55:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:17,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-28 03:55:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:17,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-28 03:55:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-28 03:55:17,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:17,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147560877] [2021-12-28 03:55:17,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147560877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:17,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:17,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 03:55:17,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655176957] [2021-12-28 03:55:17,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:17,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:55:17,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:17,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:55:17,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:55:17,156 INFO L87 Difference]: Start difference. First operand 5433 states and 7538 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-28 03:55:18,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:18,007 INFO L93 Difference]: Finished difference Result 13663 states and 19545 transitions. [2021-12-28 03:55:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:55:18,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 129 [2021-12-28 03:55:18,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:18,038 INFO L225 Difference]: With dead ends: 13663 [2021-12-28 03:55:18,038 INFO L226 Difference]: Without dead ends: 8248 [2021-12-28 03:55:18,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:55:18,049 INFO L933 BasicCegarLoop]: 682 mSDtfsCounter, 415 mSDsluCounter, 2316 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 2998 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:18,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 2998 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 03:55:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8248 states. [2021-12-28 03:55:18,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8248 to 5493. [2021-12-28 03:55:18,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5493 states, 4045 states have (on average 1.3359703337453646) internal successors, (5404), 4106 states have internal predecessors, (5404), 1092 states have call successors, (1092), 344 states have call predecessors, (1092), 355 states have return successors, (1126), 1042 states have call predecessors, (1126), 1090 states have call successors, (1126) [2021-12-28 03:55:18,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 7622 transitions. [2021-12-28 03:55:18,308 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 7622 transitions. Word has length 129 [2021-12-28 03:55:18,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:18,308 INFO L470 AbstractCegarLoop]: Abstraction has 5493 states and 7622 transitions. [2021-12-28 03:55:18,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-28 03:55:18,309 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 7622 transitions. [2021-12-28 03:55:18,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 03:55:18,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:18,316 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:18,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 03:55:18,317 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:18,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1120717474, now seen corresponding path program 1 times [2021-12-28 03:55:18,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:18,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394167555] [2021-12-28 03:55:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:18,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:18,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:18,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:18,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:18,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:18,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:55:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:18,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:55:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:18,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-28 03:55:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:18,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:18,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-28 03:55:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:18,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 03:55:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:18,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-28 03:55:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:18,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-28 03:55:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:18,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-28 03:55:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:18,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-28 03:55:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-28 03:55:18,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:18,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394167555] [2021-12-28 03:55:18,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394167555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:18,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:18,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:55:18,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999803951] [2021-12-28 03:55:18,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:18,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:55:18,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:18,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:55:18,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:55:18,566 INFO L87 Difference]: Start difference. First operand 5493 states and 7622 transitions. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-28 03:55:19,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:19,934 INFO L93 Difference]: Finished difference Result 15501 states and 22090 transitions. [2021-12-28 03:55:19,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 03:55:19,934 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 135 [2021-12-28 03:55:19,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:19,972 INFO L225 Difference]: With dead ends: 15501 [2021-12-28 03:55:19,972 INFO L226 Difference]: Without dead ends: 10026 [2021-12-28 03:55:19,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-12-28 03:55:19,989 INFO L933 BasicCegarLoop]: 708 mSDtfsCounter, 643 mSDsluCounter, 2862 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 3570 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:19,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 3570 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 03:55:19,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10026 states. [2021-12-28 03:55:20,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10026 to 7278. [2021-12-28 03:55:20,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7278 states, 5416 states have (on average 1.3389955686853767) internal successors, (7252), 5511 states have internal predecessors, (7252), 1389 states have call successors, (1389), 467 states have call predecessors, (1389), 472 states have return successors, (1441), 1299 states have call predecessors, (1441), 1387 states have call successors, (1441) [2021-12-28 03:55:20,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7278 states to 7278 states and 10082 transitions. [2021-12-28 03:55:20,309 INFO L78 Accepts]: Start accepts. Automaton has 7278 states and 10082 transitions. Word has length 135 [2021-12-28 03:55:20,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:20,310 INFO L470 AbstractCegarLoop]: Abstraction has 7278 states and 10082 transitions. [2021-12-28 03:55:20,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-28 03:55:20,311 INFO L276 IsEmpty]: Start isEmpty. Operand 7278 states and 10082 transitions. [2021-12-28 03:55:20,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 03:55:20,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:20,347 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:20,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 03:55:20,347 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:20,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:20,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1875261395, now seen corresponding path program 1 times [2021-12-28 03:55:20,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:20,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67481861] [2021-12-28 03:55:20,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:20,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:55:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:55:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:55:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:55:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 03:55:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:55:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:55:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-28 03:55:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-28 03:55:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 03:55:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-28 03:55:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-28 03:55:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 03:55:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-28 03:55:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-28 03:55:20,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:20,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67481861] [2021-12-28 03:55:20,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67481861] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:20,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:20,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 03:55:20,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676809995] [2021-12-28 03:55:20,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:20,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:55:20,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:20,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:55:20,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:55:20,515 INFO L87 Difference]: Start difference. First operand 7278 states and 10082 transitions. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-12-28 03:55:21,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:21,842 INFO L93 Difference]: Finished difference Result 18959 states and 26435 transitions. [2021-12-28 03:55:21,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 03:55:21,843 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 179 [2021-12-28 03:55:21,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:21,881 INFO L225 Difference]: With dead ends: 18959 [2021-12-28 03:55:21,881 INFO L226 Difference]: Without dead ends: 11699 [2021-12-28 03:55:21,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-12-28 03:55:21,902 INFO L933 BasicCegarLoop]: 699 mSDtfsCounter, 489 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:21,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 2092 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 03:55:21,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11699 states. [2021-12-28 03:55:22,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11699 to 11036. [2021-12-28 03:55:22,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11036 states, 8377 states have (on average 1.3416497552823206) internal successors, (11239), 8486 states have internal predecessors, (11239), 1969 states have call successors, (1969), 664 states have call predecessors, (1969), 689 states have return successors, (2039), 1885 states have call predecessors, (2039), 1967 states have call successors, (2039) [2021-12-28 03:55:22,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11036 states to 11036 states and 15247 transitions. [2021-12-28 03:55:22,384 INFO L78 Accepts]: Start accepts. Automaton has 11036 states and 15247 transitions. Word has length 179 [2021-12-28 03:55:22,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:22,384 INFO L470 AbstractCegarLoop]: Abstraction has 11036 states and 15247 transitions. [2021-12-28 03:55:22,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-12-28 03:55:22,385 INFO L276 IsEmpty]: Start isEmpty. Operand 11036 states and 15247 transitions. [2021-12-28 03:55:22,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 03:55:22,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:22,405 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:22,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 03:55:22,405 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:22,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:22,406 INFO L85 PathProgramCache]: Analyzing trace with hash 385149395, now seen corresponding path program 2 times [2021-12-28 03:55:22,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:22,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404490534] [2021-12-28 03:55:22,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:22,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:22,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:55:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 03:55:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:55:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:55:22,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 03:55:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 03:55:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-28 03:55:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-28 03:55:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-28 03:55:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 03:55:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-28 03:55:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-28 03:55:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 03:55:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-28 03:55:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-28 03:55:22,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:22,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404490534] [2021-12-28 03:55:22,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404490534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:22,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:22,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 03:55:22,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323120019] [2021-12-28 03:55:22,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:22,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:55:22,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:22,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:55:22,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:55:22,581 INFO L87 Difference]: Start difference. First operand 11036 states and 15247 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-28 03:55:23,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:23,985 INFO L93 Difference]: Finished difference Result 25811 states and 35757 transitions. [2021-12-28 03:55:23,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 03:55:23,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 179 [2021-12-28 03:55:23,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:24,037 INFO L225 Difference]: With dead ends: 25811 [2021-12-28 03:55:24,037 INFO L226 Difference]: Without dead ends: 14797 [2021-12-28 03:55:24,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:55:24,124 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 424 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 2037 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:24,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 2037 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 03:55:24,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14797 states. [2021-12-28 03:55:24,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14797 to 14270. [2021-12-28 03:55:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14270 states, 10819 states have (on average 1.3431001016729827) internal successors, (14531), 10958 states have internal predecessors, (14531), 2569 states have call successors, (2569), 838 states have call predecessors, (2569), 881 states have return successors, (2657), 2473 states have call predecessors, (2657), 2567 states have call successors, (2657) [2021-12-28 03:55:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14270 states to 14270 states and 19757 transitions. [2021-12-28 03:55:24,676 INFO L78 Accepts]: Start accepts. Automaton has 14270 states and 19757 transitions. Word has length 179 [2021-12-28 03:55:24,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:24,677 INFO L470 AbstractCegarLoop]: Abstraction has 14270 states and 19757 transitions. [2021-12-28 03:55:24,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-28 03:55:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 14270 states and 19757 transitions. [2021-12-28 03:55:24,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 03:55:24,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:24,702 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:24,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 03:55:24,702 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:24,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:24,703 INFO L85 PathProgramCache]: Analyzing trace with hash -734080811, now seen corresponding path program 1 times [2021-12-28 03:55:24,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:24,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993325350] [2021-12-28 03:55:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:24,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:55:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:55:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 03:55:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:55:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-28 03:55:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-28 03:55:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-28 03:55:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 03:55:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-28 03:55:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-28 03:55:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 03:55:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-28 03:55:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-28 03:55:24,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:24,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993325350] [2021-12-28 03:55:24,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993325350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:24,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:24,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 03:55:24,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565049166] [2021-12-28 03:55:24,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:24,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:55:24,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:24,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:55:24,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:55:24,872 INFO L87 Difference]: Start difference. First operand 14270 states and 19757 transitions. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (19), 5 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-28 03:55:26,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:26,692 INFO L93 Difference]: Finished difference Result 39420 states and 55769 transitions. [2021-12-28 03:55:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 03:55:26,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (19), 5 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 179 [2021-12-28 03:55:26,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:26,783 INFO L225 Difference]: With dead ends: 39420 [2021-12-28 03:55:26,784 INFO L226 Difference]: Without dead ends: 28377 [2021-12-28 03:55:26,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-12-28 03:55:26,818 INFO L933 BasicCegarLoop]: 783 mSDtfsCounter, 893 mSDsluCounter, 1646 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 2429 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:26,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [963 Valid, 2429 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 03:55:26,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28377 states. [2021-12-28 03:55:27,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28377 to 14302. [2021-12-28 03:55:27,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14302 states, 10851 states have (on average 1.342088286793844) internal successors, (14563), 10990 states have internal predecessors, (14563), 2569 states have call successors, (2569), 838 states have call predecessors, (2569), 881 states have return successors, (2657), 2473 states have call predecessors, (2657), 2567 states have call successors, (2657) [2021-12-28 03:55:27,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14302 states to 14302 states and 19789 transitions. [2021-12-28 03:55:27,630 INFO L78 Accepts]: Start accepts. Automaton has 14302 states and 19789 transitions. Word has length 179 [2021-12-28 03:55:27,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:27,630 INFO L470 AbstractCegarLoop]: Abstraction has 14302 states and 19789 transitions. [2021-12-28 03:55:27,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (19), 5 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-28 03:55:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 14302 states and 19789 transitions. [2021-12-28 03:55:27,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-28 03:55:27,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:27,654 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:27,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 03:55:27,654 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:27,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:27,655 INFO L85 PathProgramCache]: Analyzing trace with hash -814466245, now seen corresponding path program 1 times [2021-12-28 03:55:27,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:27,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544767293] [2021-12-28 03:55:27,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:27,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:55:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:55:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 03:55:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-28 03:55:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 03:55:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-28 03:55:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-28 03:55:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-28 03:55:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-28 03:55:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-28 03:55:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-28 03:55:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-28 03:55:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-28 03:55:27,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:27,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544767293] [2021-12-28 03:55:27,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544767293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:27,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:27,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:55:27,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439829110] [2021-12-28 03:55:27,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:27,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:55:27,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:27,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:55:27,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:55:27,807 INFO L87 Difference]: Start difference. First operand 14302 states and 19789 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (19), 5 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-28 03:55:28,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:28,947 INFO L93 Difference]: Finished difference Result 30158 states and 41553 transitions. [2021-12-28 03:55:28,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 03:55:28,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (19), 5 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 188 [2021-12-28 03:55:28,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:28,992 INFO L225 Difference]: With dead ends: 30158 [2021-12-28 03:55:28,993 INFO L226 Difference]: Without dead ends: 15878 [2021-12-28 03:55:29,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:55:29,015 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 485 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:29,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 1545 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 03:55:29,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15878 states. [2021-12-28 03:55:29,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15878 to 15337. [2021-12-28 03:55:29,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15337 states, 11815 states have (on average 1.3262801523487093) internal successors, (15670), 11910 states have internal predecessors, (15670), 2513 states have call successors, (2513), 969 states have call predecessors, (2513), 1008 states have return successors, (2591), 2457 states have call predecessors, (2591), 2511 states have call successors, (2591) [2021-12-28 03:55:29,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15337 states to 15337 states and 20774 transitions. [2021-12-28 03:55:29,742 INFO L78 Accepts]: Start accepts. Automaton has 15337 states and 20774 transitions. Word has length 188 [2021-12-28 03:55:29,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:29,743 INFO L470 AbstractCegarLoop]: Abstraction has 15337 states and 20774 transitions. [2021-12-28 03:55:29,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (19), 5 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-28 03:55:29,743 INFO L276 IsEmpty]: Start isEmpty. Operand 15337 states and 20774 transitions. [2021-12-28 03:55:29,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-28 03:55:29,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:29,762 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:29,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 03:55:29,762 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:29,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:29,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1116840713, now seen corresponding path program 2 times [2021-12-28 03:55:29,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:29,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684689734] [2021-12-28 03:55:29,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:29,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:29,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:29,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:29,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:29,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:29,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:55:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:29,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:55:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:29,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 03:55:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:29,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:55:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:29,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:29,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-28 03:55:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:29,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-28 03:55:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:29,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:29,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-28 03:55:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:29,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 03:55:29,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:29,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-28 03:55:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:29,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-28 03:55:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:29,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 03:55:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:29,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-28 03:55:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:29,973 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-28 03:55:29,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:29,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684689734] [2021-12-28 03:55:29,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684689734] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:55:29,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498053126] [2021-12-28 03:55:29,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:55:29,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:29,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:55:29,976 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) [2021-12-28 03:55:30,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 03:55:30,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:55:30,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:55:30,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 1709 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 03:55:30,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:55:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 67 proven. 3 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-28 03:55:30,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:55:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-28 03:55:30,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498053126] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:55:30,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:55:30,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 9 [2021-12-28 03:55:30,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387764770] [2021-12-28 03:55:30,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:55:30,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:55:30,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:30,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:55:30,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:55:30,933 INFO L87 Difference]: Start difference. First operand 15337 states and 20774 transitions. Second operand has 9 states, 9 states have (on average 21.88888888888889) internal successors, (197), 6 states have internal predecessors, (197), 5 states have call successors, (45), 7 states have call predecessors, (45), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-12-28 03:55:33,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:33,640 INFO L93 Difference]: Finished difference Result 28734 states and 38755 transitions. [2021-12-28 03:55:33,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-28 03:55:33,640 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 21.88888888888889) internal successors, (197), 6 states have internal predecessors, (197), 5 states have call successors, (45), 7 states have call predecessors, (45), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) Word has length 188 [2021-12-28 03:55:33,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:33,727 INFO L225 Difference]: With dead ends: 28734 [2021-12-28 03:55:33,727 INFO L226 Difference]: Without dead ends: 28723 [2021-12-28 03:55:33,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 418 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-12-28 03:55:33,742 INFO L933 BasicCegarLoop]: 1227 mSDtfsCounter, 1629 mSDsluCounter, 2690 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1819 SdHoareTripleChecker+Valid, 3917 SdHoareTripleChecker+Invalid, 2372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:33,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1819 Valid, 3917 Invalid, 2372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-28 03:55:33,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28723 states. [2021-12-28 03:55:34,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28723 to 14444. [2021-12-28 03:55:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14444 states, 11113 states have (on average 1.3267344551426257) internal successors, (14744), 11205 states have internal predecessors, (14744), 2383 states have call successors, (2383), 915 states have call predecessors, (2383), 947 states have return successors, (2457), 2323 states have call predecessors, (2457), 2381 states have call successors, (2457) [2021-12-28 03:55:34,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14444 states to 14444 states and 19584 transitions. [2021-12-28 03:55:34,549 INFO L78 Accepts]: Start accepts. Automaton has 14444 states and 19584 transitions. Word has length 188 [2021-12-28 03:55:34,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:34,550 INFO L470 AbstractCegarLoop]: Abstraction has 14444 states and 19584 transitions. [2021-12-28 03:55:34,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.88888888888889) internal successors, (197), 6 states have internal predecessors, (197), 5 states have call successors, (45), 7 states have call predecessors, (45), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-12-28 03:55:34,550 INFO L276 IsEmpty]: Start isEmpty. Operand 14444 states and 19584 transitions. [2021-12-28 03:55:34,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-28 03:55:34,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:34,568 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:34,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 03:55:34,791 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,SelfDestructingSolverStorable14 [2021-12-28 03:55:34,792 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:34,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:34,792 INFO L85 PathProgramCache]: Analyzing trace with hash -705168335, now seen corresponding path program 1 times [2021-12-28 03:55:34,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:34,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763934905] [2021-12-28 03:55:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:34,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:55:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:55:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 03:55:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:55:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-28 03:55:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-28 03:55:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-28 03:55:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 03:55:34,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-28 03:55:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-28 03:55:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 03:55:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-28 03:55:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-28 03:55:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-28 03:55:35,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:35,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763934905] [2021-12-28 03:55:35,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763934905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:35,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:35,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:55:35,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750098448] [2021-12-28 03:55:35,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:35,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:55:35,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:35,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:55:35,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:55:35,007 INFO L87 Difference]: Start difference. First operand 14444 states and 19584 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (20), 5 states have call predecessors, (20), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-28 03:55:35,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:35,960 INFO L93 Difference]: Finished difference Result 21976 states and 29885 transitions. [2021-12-28 03:55:35,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 03:55:35,960 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (20), 5 states have call predecessors, (20), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 189 [2021-12-28 03:55:35,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:35,984 INFO L225 Difference]: With dead ends: 21976 [2021-12-28 03:55:35,984 INFO L226 Difference]: Without dead ends: 7014 [2021-12-28 03:55:36,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:55:36,011 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 453 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:36,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 1471 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 03:55:36,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7014 states. [2021-12-28 03:55:36,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7014 to 6549. [2021-12-28 03:55:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6549 states, 5036 states have (on average 1.3157267672756157) internal successors, (6626), 5080 states have internal predecessors, (6626), 1087 states have call successors, (1087), 412 states have call predecessors, (1087), 425 states have return successors, (1121), 1056 states have call predecessors, (1121), 1085 states have call successors, (1121) [2021-12-28 03:55:36,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6549 states to 6549 states and 8834 transitions. [2021-12-28 03:55:36,416 INFO L78 Accepts]: Start accepts. Automaton has 6549 states and 8834 transitions. Word has length 189 [2021-12-28 03:55:36,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:36,416 INFO L470 AbstractCegarLoop]: Abstraction has 6549 states and 8834 transitions. [2021-12-28 03:55:36,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (20), 5 states have call predecessors, (20), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-28 03:55:36,416 INFO L276 IsEmpty]: Start isEmpty. Operand 6549 states and 8834 transitions. [2021-12-28 03:55:36,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-28 03:55:36,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:36,425 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:36,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 03:55:36,426 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:36,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:36,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1027767052, now seen corresponding path program 1 times [2021-12-28 03:55:36,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:36,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441780016] [2021-12-28 03:55:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:36,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:55:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:55:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 03:55:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-28 03:55:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:55:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 03:55:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:55:36,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:55:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 03:55:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-28 03:55:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-28 03:55:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 03:55:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-28 03:55:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-28 03:55:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-28 03:55:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-28 03:55:36,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:36,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441780016] [2021-12-28 03:55:36,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441780016] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:36,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:36,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 03:55:36,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030091294] [2021-12-28 03:55:36,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:36,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:55:36,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:36,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:55:36,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:55:36,581 INFO L87 Difference]: Start difference. First operand 6549 states and 8834 transitions. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-28 03:55:38,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:38,103 INFO L93 Difference]: Finished difference Result 16524 states and 22262 transitions. [2021-12-28 03:55:38,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 03:55:38,104 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 197 [2021-12-28 03:55:38,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:38,131 INFO L225 Difference]: With dead ends: 16524 [2021-12-28 03:55:38,132 INFO L226 Difference]: Without dead ends: 10374 [2021-12-28 03:55:38,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-12-28 03:55:38,146 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 659 mSDsluCounter, 2124 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 2922 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:38,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 2922 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 03:55:38,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10374 states. [2021-12-28 03:55:38,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10374 to 6591. [2021-12-28 03:55:38,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6591 states, 5078 states have (on average 1.3131153997636864) internal successors, (6668), 5122 states have internal predecessors, (6668), 1087 states have call successors, (1087), 412 states have call predecessors, (1087), 425 states have return successors, (1121), 1056 states have call predecessors, (1121), 1085 states have call successors, (1121) [2021-12-28 03:55:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6591 states to 6591 states and 8876 transitions. [2021-12-28 03:55:38,536 INFO L78 Accepts]: Start accepts. Automaton has 6591 states and 8876 transitions. Word has length 197 [2021-12-28 03:55:38,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:38,536 INFO L470 AbstractCegarLoop]: Abstraction has 6591 states and 8876 transitions. [2021-12-28 03:55:38,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-28 03:55:38,537 INFO L276 IsEmpty]: Start isEmpty. Operand 6591 states and 8876 transitions. [2021-12-28 03:55:38,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-28 03:55:38,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:38,544 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:38,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 03:55:38,544 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:38,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:38,545 INFO L85 PathProgramCache]: Analyzing trace with hash 18679536, now seen corresponding path program 1 times [2021-12-28 03:55:38,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:38,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361577929] [2021-12-28 03:55:38,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:38,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:55:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:55:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 03:55:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:55:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-28 03:55:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-28 03:55:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-28 03:55:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 03:55:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-28 03:55:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-28 03:55:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 03:55:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-28 03:55:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-28 03:55:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-28 03:55:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-12-28 03:55:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-28 03:55:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-28 03:55:38,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:38,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361577929] [2021-12-28 03:55:38,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361577929] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:38,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:38,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 03:55:38,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578455398] [2021-12-28 03:55:38,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:38,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:55:38,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:38,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:55:38,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:55:38,723 INFO L87 Difference]: Start difference. First operand 6591 states and 8876 transitions. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2021-12-28 03:55:40,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:40,286 INFO L93 Difference]: Finished difference Result 14906 states and 21265 transitions. [2021-12-28 03:55:40,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 03:55:40,287 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 195 [2021-12-28 03:55:40,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:40,320 INFO L225 Difference]: With dead ends: 14906 [2021-12-28 03:55:40,320 INFO L226 Difference]: Without dead ends: 13298 [2021-12-28 03:55:40,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-28 03:55:40,329 INFO L933 BasicCegarLoop]: 900 mSDtfsCounter, 661 mSDsluCounter, 2680 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 3580 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:40,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 3580 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 03:55:40,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13298 states. [2021-12-28 03:55:40,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13298 to 6621. [2021-12-28 03:55:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6621 states, 5108 states have (on average 1.3112764291307752) internal successors, (6698), 5152 states have internal predecessors, (6698), 1087 states have call successors, (1087), 412 states have call predecessors, (1087), 425 states have return successors, (1121), 1056 states have call predecessors, (1121), 1085 states have call successors, (1121) [2021-12-28 03:55:40,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6621 states to 6621 states and 8906 transitions. [2021-12-28 03:55:40,746 INFO L78 Accepts]: Start accepts. Automaton has 6621 states and 8906 transitions. Word has length 195 [2021-12-28 03:55:40,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:40,746 INFO L470 AbstractCegarLoop]: Abstraction has 6621 states and 8906 transitions. [2021-12-28 03:55:40,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2021-12-28 03:55:40,747 INFO L276 IsEmpty]: Start isEmpty. Operand 6621 states and 8906 transitions. [2021-12-28 03:55:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-28 03:55:40,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:40,754 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:40,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 03:55:40,754 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:40,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:40,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1500364211, now seen corresponding path program 1 times [2021-12-28 03:55:40,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:40,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631242746] [2021-12-28 03:55:40,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:40,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:55:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:55:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 03:55:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:55:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-28 03:55:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-28 03:55:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-28 03:55:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:55:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-28 03:55:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 03:55:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-28 03:55:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-28 03:55:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-28 03:55:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 03:55:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-28 03:55:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-28 03:55:40,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:40,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631242746] [2021-12-28 03:55:40,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631242746] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:55:40,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177308696] [2021-12-28 03:55:40,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:40,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:40,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:55:40,984 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) [2021-12-28 03:55:40,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 03:55:41,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:41,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1735 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-28 03:55:41,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:55:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-28 03:55:41,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:55:41,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177308696] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:41,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:55:41,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-12-28 03:55:41,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025641594] [2021-12-28 03:55:41,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:41,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:55:41,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:41,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:55:41,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-12-28 03:55:41,657 INFO L87 Difference]: Start difference. First operand 6621 states and 8906 transitions. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-28 03:55:43,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:43,583 INFO L93 Difference]: Finished difference Result 17886 states and 24896 transitions. [2021-12-28 03:55:43,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-28 03:55:43,583 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 198 [2021-12-28 03:55:43,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:43,616 INFO L225 Difference]: With dead ends: 17886 [2021-12-28 03:55:43,616 INFO L226 Difference]: Without dead ends: 16269 [2021-12-28 03:55:43,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-12-28 03:55:43,625 INFO L933 BasicCegarLoop]: 1019 mSDtfsCounter, 3710 mSDsluCounter, 4905 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 779 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3729 SdHoareTripleChecker+Valid, 5924 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 779 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:43,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3729 Valid, 5924 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [779 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 03:55:43,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16269 states. [2021-12-28 03:55:44,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16269 to 7790. [2021-12-28 03:55:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7790 states, 6046 states have (on average 1.3134303671849157) internal successors, (7941), 6115 states have internal predecessors, (7941), 1246 states have call successors, (1246), 478 states have call predecessors, (1246), 497 states have return successors, (1296), 1196 states have call predecessors, (1296), 1244 states have call successors, (1296) [2021-12-28 03:55:44,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7790 states to 7790 states and 10483 transitions. [2021-12-28 03:55:44,278 INFO L78 Accepts]: Start accepts. Automaton has 7790 states and 10483 transitions. Word has length 198 [2021-12-28 03:55:44,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:44,278 INFO L470 AbstractCegarLoop]: Abstraction has 7790 states and 10483 transitions. [2021-12-28 03:55:44,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-28 03:55:44,279 INFO L276 IsEmpty]: Start isEmpty. Operand 7790 states and 10483 transitions. [2021-12-28 03:55:44,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-28 03:55:44,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:44,287 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:44,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 03:55:44,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:44,490 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:44,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:44,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1738944107, now seen corresponding path program 1 times [2021-12-28 03:55:44,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:44,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665995748] [2021-12-28 03:55:44,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:44,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:55:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:55:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 03:55:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:55:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-28 03:55:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-28 03:55:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-28 03:55:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 03:55:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-28 03:55:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-28 03:55:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 03:55:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-28 03:55:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-28 03:55:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-28 03:55:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-12-28 03:55:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-28 03:55:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-12-28 03:55:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-28 03:55:44,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:44,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665995748] [2021-12-28 03:55:44,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665995748] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:44,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:44,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 03:55:44,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787643259] [2021-12-28 03:55:44,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:44,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:55:44,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:44,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:55:44,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:55:44,753 INFO L87 Difference]: Start difference. First operand 7790 states and 10483 transitions. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-12-28 03:55:46,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:46,968 INFO L93 Difference]: Finished difference Result 9720 states and 13129 transitions. [2021-12-28 03:55:46,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-28 03:55:46,969 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 201 [2021-12-28 03:55:46,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:46,990 INFO L225 Difference]: With dead ends: 9720 [2021-12-28 03:55:46,990 INFO L226 Difference]: Without dead ends: 9717 [2021-12-28 03:55:46,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-12-28 03:55:46,995 INFO L933 BasicCegarLoop]: 900 mSDtfsCounter, 1209 mSDsluCounter, 1909 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 968 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1304 SdHoareTripleChecker+Valid, 2809 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 968 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:46,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1304 Valid, 2809 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [968 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-28 03:55:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9717 states. [2021-12-28 03:55:47,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9717 to 9400. [2021-12-28 03:55:47,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9400 states, 7277 states have (on average 1.3124914112958637) internal successors, (9551), 7353 states have internal predecessors, (9551), 1524 states have call successors, (1524), 574 states have call predecessors, (1524), 598 states have return successors, (1583), 1472 states have call predecessors, (1583), 1522 states have call successors, (1583) [2021-12-28 03:55:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9400 states to 9400 states and 12658 transitions. [2021-12-28 03:55:47,622 INFO L78 Accepts]: Start accepts. Automaton has 9400 states and 12658 transitions. Word has length 201 [2021-12-28 03:55:47,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:47,623 INFO L470 AbstractCegarLoop]: Abstraction has 9400 states and 12658 transitions. [2021-12-28 03:55:47,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-12-28 03:55:47,623 INFO L276 IsEmpty]: Start isEmpty. Operand 9400 states and 12658 transitions. [2021-12-28 03:55:47,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-28 03:55:47,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:47,631 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:47,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 03:55:47,631 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:47,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1257863849, now seen corresponding path program 1 times [2021-12-28 03:55:47,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:47,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514085037] [2021-12-28 03:55:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:47,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:55:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:55:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 03:55:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:55:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-28 03:55:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-28 03:55:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-28 03:55:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 03:55:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-28 03:55:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-28 03:55:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 03:55:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-28 03:55:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-28 03:55:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-28 03:55:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-12-28 03:55:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-28 03:55:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-12-28 03:55:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-28 03:55:47,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:47,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514085037] [2021-12-28 03:55:47,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514085037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:47,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:47,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-28 03:55:47,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164919198] [2021-12-28 03:55:47,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:47,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 03:55:47,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:47,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 03:55:47,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-28 03:55:47,822 INFO L87 Difference]: Start difference. First operand 9400 states and 12658 transitions. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 7 states have internal predecessors, (125), 2 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-12-28 03:55:50,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:50,493 INFO L93 Difference]: Finished difference Result 25097 states and 35438 transitions. [2021-12-28 03:55:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 03:55:50,494 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 7 states have internal predecessors, (125), 2 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 201 [2021-12-28 03:55:50,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:50,530 INFO L225 Difference]: With dead ends: 25097 [2021-12-28 03:55:50,530 INFO L226 Difference]: Without dead ends: 17818 [2021-12-28 03:55:50,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-12-28 03:55:50,548 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 1667 mSDsluCounter, 4956 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 598 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1757 SdHoareTripleChecker+Valid, 5844 SdHoareTripleChecker+Invalid, 2655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 598 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:50,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1757 Valid, 5844 Invalid, 2655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [598 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-28 03:55:50,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17818 states. [2021-12-28 03:55:51,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17818 to 8161. [2021-12-28 03:55:51,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8161 states, 6348 states have (on average 1.3043478260869565) internal successors, (8280), 6423 states have internal predecessors, (8280), 1273 states have call successors, (1273), 516 states have call predecessors, (1273), 539 states have return successors, (1331), 1221 states have call predecessors, (1331), 1271 states have call successors, (1331) [2021-12-28 03:55:51,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8161 states to 8161 states and 10884 transitions. [2021-12-28 03:55:51,272 INFO L78 Accepts]: Start accepts. Automaton has 8161 states and 10884 transitions. Word has length 201 [2021-12-28 03:55:51,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:51,273 INFO L470 AbstractCegarLoop]: Abstraction has 8161 states and 10884 transitions. [2021-12-28 03:55:51,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 7 states have internal predecessors, (125), 2 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-12-28 03:55:51,273 INFO L276 IsEmpty]: Start isEmpty. Operand 8161 states and 10884 transitions. [2021-12-28 03:55:51,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-28 03:55:51,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:51,283 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:51,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 03:55:51,284 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:51,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:51,284 INFO L85 PathProgramCache]: Analyzing trace with hash 978270283, now seen corresponding path program 1 times [2021-12-28 03:55:51,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:51,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974662735] [2021-12-28 03:55:51,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:51,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:55:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:55:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 03:55:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:55:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-28 03:55:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-28 03:55:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-28 03:55:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:55:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-28 03:55:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 03:55:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-28 03:55:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-28 03:55:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-28 03:55:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 03:55:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-28 03:55:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-12-28 03:55:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-12-28 03:55:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-12-28 03:55:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 03:55:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2021-12-28 03:55:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-28 03:55:51,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:51,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974662735] [2021-12-28 03:55:51,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974662735] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:55:51,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607707126] [2021-12-28 03:55:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:51,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:51,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:55:51,503 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) [2021-12-28 03:55:51,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 03:55:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:51,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 1996 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-28 03:55:51,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:55:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-28 03:55:52,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:55:52,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607707126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:52,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:55:52,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2021-12-28 03:55:52,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955584246] [2021-12-28 03:55:52,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:52,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:55:52,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:52,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:55:52,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:55:52,484 INFO L87 Difference]: Start difference. First operand 8161 states and 10884 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-12-28 03:55:53,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:53,291 INFO L93 Difference]: Finished difference Result 11531 states and 15425 transitions. [2021-12-28 03:55:53,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 03:55:53,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 234 [2021-12-28 03:55:53,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:53,306 INFO L225 Difference]: With dead ends: 11531 [2021-12-28 03:55:53,306 INFO L226 Difference]: Without dead ends: 8267 [2021-12-28 03:55:53,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:55:53,310 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 572 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:53,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 874 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:55:53,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8267 states. [2021-12-28 03:55:53,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8267 to 8141. [2021-12-28 03:55:53,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8141 states, 6338 states have (on average 1.3032502366677186) internal successors, (8260), 6413 states have internal predecessors, (8260), 1263 states have call successors, (1263), 516 states have call predecessors, (1263), 539 states have return successors, (1321), 1211 states have call predecessors, (1321), 1261 states have call successors, (1321) [2021-12-28 03:55:53,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8141 states to 8141 states and 10844 transitions. [2021-12-28 03:55:53,847 INFO L78 Accepts]: Start accepts. Automaton has 8141 states and 10844 transitions. Word has length 234 [2021-12-28 03:55:53,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:53,847 INFO L470 AbstractCegarLoop]: Abstraction has 8141 states and 10844 transitions. [2021-12-28 03:55:53,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-12-28 03:55:53,847 INFO L276 IsEmpty]: Start isEmpty. Operand 8141 states and 10844 transitions. [2021-12-28 03:55:53,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-28 03:55:53,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:53,857 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:53,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-28 03:55:54,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:54,058 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:54,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:54,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1759012363, now seen corresponding path program 1 times [2021-12-28 03:55:54,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:54,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735147996] [2021-12-28 03:55:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:54,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:55:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:55:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 03:55:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:55:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-28 03:55:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-28 03:55:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-28 03:55:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:55:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-28 03:55:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 03:55:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-28 03:55:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-28 03:55:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-28 03:55:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 03:55:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-28 03:55:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-12-28 03:55:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-12-28 03:55:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-12-28 03:55:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 03:55:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2021-12-28 03:55:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-28 03:55:54,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:54,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735147996] [2021-12-28 03:55:54,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735147996] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:55:54,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779837483] [2021-12-28 03:55:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:54,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:54,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:55:54,302 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) [2021-12-28 03:55:54,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 03:55:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:54,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 1996 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-28 03:55:54,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:55:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-28 03:55:55,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:55:55,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779837483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:55,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:55:55,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2021-12-28 03:55:55,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983859603] [2021-12-28 03:55:55,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:55,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:55:55,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:55,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:55:55,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-12-28 03:55:55,528 INFO L87 Difference]: Start difference. First operand 8141 states and 10844 transitions. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 7 states have internal predecessors, (152), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-12-28 03:55:57,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:57,464 INFO L93 Difference]: Finished difference Result 22544 states and 31025 transitions. [2021-12-28 03:55:57,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 03:55:57,464 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 7 states have internal predecessors, (152), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) Word has length 234 [2021-12-28 03:55:57,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:57,498 INFO L225 Difference]: With dead ends: 22544 [2021-12-28 03:55:57,499 INFO L226 Difference]: Without dead ends: 16110 [2021-12-28 03:55:57,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-12-28 03:55:57,513 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 933 mSDsluCounter, 2612 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 3277 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:57,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [959 Valid, 3277 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 03:55:57,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16110 states. [2021-12-28 03:55:58,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16110 to 10636. [2021-12-28 03:55:58,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10636 states, 8362 states have (on average 1.3126046400382683) internal successors, (10976), 8479 states have internal predecessors, (10976), 1569 states have call successors, (1569), 680 states have call predecessors, (1569), 704 states have return successors, (1653), 1476 states have call predecessors, (1653), 1567 states have call successors, (1653) [2021-12-28 03:55:58,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10636 states to 10636 states and 14198 transitions. [2021-12-28 03:55:58,356 INFO L78 Accepts]: Start accepts. Automaton has 10636 states and 14198 transitions. Word has length 234 [2021-12-28 03:55:58,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:58,356 INFO L470 AbstractCegarLoop]: Abstraction has 10636 states and 14198 transitions. [2021-12-28 03:55:58,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 7 states have internal predecessors, (152), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-12-28 03:55:58,356 INFO L276 IsEmpty]: Start isEmpty. Operand 10636 states and 14198 transitions. [2021-12-28 03:55:58,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-12-28 03:55:58,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:58,370 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:58,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-28 03:55:58,570 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,SelfDestructingSolverStorable22 [2021-12-28 03:55:58,571 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:58,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:58,571 INFO L85 PathProgramCache]: Analyzing trace with hash -699038396, now seen corresponding path program 1 times [2021-12-28 03:55:58,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:58,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63376323] [2021-12-28 03:55:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:58,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:55:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:55:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:55:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:55:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 03:55:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:55:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-28 03:55:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-28 03:55:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-28 03:55:58,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 03:55:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-28 03:55:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-28 03:55:58,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 03:55:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-28 03:55:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-28 03:55:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-28 03:55:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-12-28 03:55:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-28 03:55:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-12-28 03:55:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-28 03:55:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:55:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:55:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 03:55:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:55:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:55:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-28 03:55:58,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:58,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63376323] [2021-12-28 03:55:58,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63376323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:55:58,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798781821] [2021-12-28 03:55:58,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:58,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:58,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:55:58,812 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) [2021-12-28 03:55:58,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 03:55:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:59,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-28 03:55:59,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:55:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-28 03:55:59,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:55:59,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798781821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:59,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:55:59,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2021-12-28 03:55:59,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106557849] [2021-12-28 03:55:59,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:59,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:55:59,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:59,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:55:59,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-12-28 03:55:59,813 INFO L87 Difference]: Start difference. First operand 10636 states and 14198 transitions. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 5 states have internal predecessors, (162), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 3 states have call successors, (30) [2021-12-28 03:56:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:56:00,939 INFO L93 Difference]: Finished difference Result 14891 states and 19922 transitions. [2021-12-28 03:56:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:56:00,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 5 states have internal predecessors, (162), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 3 states have call successors, (30) Word has length 259 [2021-12-28 03:56:00,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:56:00,963 INFO L225 Difference]: With dead ends: 14891 [2021-12-28 03:56:00,963 INFO L226 Difference]: Without dead ends: 10766 [2021-12-28 03:56:00,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-12-28 03:56:00,972 INFO L933 BasicCegarLoop]: 635 mSDtfsCounter, 460 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 1827 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:56:00,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 1827 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 03:56:00,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10766 states. [2021-12-28 03:56:01,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10766 to 10644. [2021-12-28 03:56:01,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10644 states, 8370 states have (on average 1.3123058542413382) internal successors, (10984), 8487 states have internal predecessors, (10984), 1569 states have call successors, (1569), 680 states have call predecessors, (1569), 704 states have return successors, (1653), 1476 states have call predecessors, (1653), 1567 states have call successors, (1653) [2021-12-28 03:56:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10644 states to 10644 states and 14206 transitions. [2021-12-28 03:56:01,728 INFO L78 Accepts]: Start accepts. Automaton has 10644 states and 14206 transitions. Word has length 259 [2021-12-28 03:56:01,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:56:01,728 INFO L470 AbstractCegarLoop]: Abstraction has 10644 states and 14206 transitions. [2021-12-28 03:56:01,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 5 states have internal predecessors, (162), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 3 states have call successors, (30) [2021-12-28 03:56:01,728 INFO L276 IsEmpty]: Start isEmpty. Operand 10644 states and 14206 transitions. [2021-12-28 03:56:01,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-12-28 03:56:01,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:56:01,741 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:56:01,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 03:56:01,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:56:01,945 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:56:01,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:56:01,945 INFO L85 PathProgramCache]: Analyzing trace with hash -299223804, now seen corresponding path program 1 times [2021-12-28 03:56:01,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:56:01,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52722767] [2021-12-28 03:56:01,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:56:01,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:56:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:56:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:56:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:56:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:56:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:56:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:56:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 03:56:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:56:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:56:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-28 03:56:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-28 03:56:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:56:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-28 03:56:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 03:56:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-28 03:56:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-28 03:56:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 03:56:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-28 03:56:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-12-28 03:56:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-28 03:56:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-12-28 03:56:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-28 03:56:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2021-12-28 03:56:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-12-28 03:56:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:56:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:56:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:56:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 03:56:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:56:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:56:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-28 03:56:02,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:56:02,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52722767] [2021-12-28 03:56:02,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52722767] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:56:02,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395551082] [2021-12-28 03:56:02,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:56:02,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:56:02,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:56:02,210 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) [2021-12-28 03:56:02,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 03:56:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:56:02,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 2226 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 03:56:02,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:56:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 47 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-28 03:56:02,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:56:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-28 03:56:03,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395551082] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-28 03:56:03,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:56:03,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 5] total 14 [2021-12-28 03:56:03,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718249976] [2021-12-28 03:56:03,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:56:03,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:56:03,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:56:03,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:56:03,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-12-28 03:56:03,321 INFO L87 Difference]: Start difference. First operand 10644 states and 14206 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30)