./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--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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--net--wireless--libertas--usb8xxx.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 0b2aee7f7e67804021e49e5736bb0f9c1b2e215c216274214a3b77fa62ce19be --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 16:09:40,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 16:09:40,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 16:09:40,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 16:09:40,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 16:09:40,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 16:09:40,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 16:09:40,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 16:09:40,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 16:09:40,659 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 16:09:40,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 16:09:40,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 16:09:40,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 16:09:40,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 16:09:40,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 16:09:40,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 16:09:40,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 16:09:40,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 16:09:40,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 16:09:40,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 16:09:40,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 16:09:40,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 16:09:40,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 16:09:40,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 16:09:40,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 16:09:40,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 16:09:40,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 16:09:40,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 16:09:40,700 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 16:09:40,700 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 16:09:40,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 16:09:40,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 16:09:40,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 16:09:40,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 16:09:40,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 16:09:40,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 16:09:40,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 16:09:40,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 16:09:40,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 16:09:40,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 16:09:40,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 16:09:40,708 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 16:09:40,735 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 16:09:40,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 16:09:40,736 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 16:09:40,736 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 16:09:40,737 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 16:09:40,737 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 16:09:40,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 16:09:40,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 16:09:40,738 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 16:09:40,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 16:09:40,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 16:09:40,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 16:09:40,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 16:09:40,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 16:09:40,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 16:09:40,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 16:09:40,739 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 16:09:40,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 16:09:40,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 16:09:40,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 16:09:40,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 16:09:40,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:09:40,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 16:09:40,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 16:09:40,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 16:09:40,741 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 16:09:40,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 16:09:40,742 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 16:09:40,742 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 16:09:40,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 16:09:40,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 16:09:40,742 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b2aee7f7e67804021e49e5736bb0f9c1b2e215c216274214a3b77fa62ce19be [2021-12-21 16:09:40,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 16:09:40,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 16:09:40,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 16:09:40,938 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 16:09:40,939 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 16:09:40,939 INFO L432 ainManager$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--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2021-12-21 16:09:40,999 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10897add5/3fda34a2ba894e48819f7da8c7abb21c/FLAG5bc14558e [2021-12-21 16:09:41,602 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 16:09:41,603 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--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2021-12-21 16:09:41,640 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10897add5/3fda34a2ba894e48819f7da8c7abb21c/FLAG5bc14558e [2021-12-21 16:09:42,029 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10897add5/3fda34a2ba894e48819f7da8c7abb21c [2021-12-21 16:09:42,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 16:09:42,033 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 16:09:42,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 16:09:42,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 16:09:42,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 16:09:42,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:09:42" (1/1) ... [2021-12-21 16:09:42,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fdceb39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:42, skipping insertion in model container [2021-12-21 16:09:42,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:09:42" (1/1) ... [2021-12-21 16:09:42,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 16:09:42,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 16:09:42,772 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--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[182154,182167] [2021-12-21 16:09:43,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:09:43,111 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 16:09:43,234 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--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[182154,182167] [2021-12-21 16:09:43,324 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:09:43,374 INFO L208 MainTranslator]: Completed translation [2021-12-21 16:09:43,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:43 WrapperNode [2021-12-21 16:09:43,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 16:09:43,377 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 16:09:43,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 16:09:43,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 16:09:43,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:43" (1/1) ... [2021-12-21 16:09:43,418 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:43" (1/1) ... [2021-12-21 16:09:43,510 INFO L137 Inliner]: procedures = 174, calls = 1340, calls flagged for inlining = 82, calls inlined = 66, statements flattened = 2613 [2021-12-21 16:09:43,510 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 16:09:43,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 16:09:43,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 16:09:43,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 16:09:43,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:43" (1/1) ... [2021-12-21 16:09:43,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:43" (1/1) ... [2021-12-21 16:09:43,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:43" (1/1) ... [2021-12-21 16:09:43,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:43" (1/1) ... [2021-12-21 16:09:43,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:43" (1/1) ... [2021-12-21 16:09:43,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:43" (1/1) ... [2021-12-21 16:09:43,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:43" (1/1) ... [2021-12-21 16:09:43,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 16:09:43,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 16:09:43,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 16:09:43,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 16:09:43,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:43" (1/1) ... [2021-12-21 16:09:43,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:09:43,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:09:43,710 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) [2021-12-21 16:09:43,716 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 [2021-12-21 16:09:43,737 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_reset_device [2021-12-21 16:09:43,738 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_reset_device [2021-12-21 16:09:43,738 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_resume [2021-12-21 16:09:43,739 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_resume [2021-12-21 16:09:43,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-21 16:09:43,739 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-12-21 16:09:43,739 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-12-21 16:09:43,739 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_12 [2021-12-21 16:09:43,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_12 [2021-12-21 16:09:43,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-21 16:09:43,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-21 16:09:43,740 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-21 16:09:43,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-21 16:09:43,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 16:09:43,740 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-12-21 16:09:43,740 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-12-21 16:09:43,740 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-12-21 16:09:43,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-12-21 16:09:43,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-21 16:09:43,741 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-21 16:09:43,741 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-21 16:09:43,741 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-21 16:09:43,741 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-21 16:09:43,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-21 16:09:43,742 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2021-12-21 16:09:43,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2021-12-21 16:09:43,742 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_submit_rx_urb_fwload [2021-12-21 16:09:43,742 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_submit_rx_urb_fwload [2021-12-21 16:09:43,742 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-12-21 16:09:43,743 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-12-21 16:09:43,743 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2021-12-21 16:09:43,743 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2021-12-21 16:09:43,743 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_submit_rx_urb [2021-12-21 16:09:43,743 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_submit_rx_urb [2021-12-21 16:09:43,743 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_receive_fwload [2021-12-21 16:09:43,743 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_receive_fwload [2021-12-21 16:09:43,743 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-21 16:09:43,744 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-21 16:09:43,744 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_send_fw_pkt [2021-12-21 16:09:43,744 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_send_fw_pkt [2021-12-21 16:09:43,744 INFO L130 BoogieDeclarations]: Found specification of procedure __if_usb_submit_rx_urb [2021-12-21 16:09:43,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __if_usb_submit_rx_urb [2021-12-21 16:09:43,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 16:09:43,745 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-21 16:09:43,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-21 16:09:43,745 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_free [2021-12-21 16:09:43,745 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_free [2021-12-21 16:09:43,745 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-21 16:09:43,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-21 16:09:43,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-21 16:09:43,746 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-21 16:09:43,746 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 16:09:43,746 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 16:09:43,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 16:09:43,746 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-12-21 16:09:43,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-12-21 16:09:43,747 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_disconnect [2021-12-21 16:09:43,748 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_disconnect [2021-12-21 16:09:43,748 INFO L130 BoogieDeclarations]: Found specification of procedure usb_tx_block [2021-12-21 16:09:43,748 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_tx_block [2021-12-21 16:09:43,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 16:09:43,748 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2021-12-21 16:09:43,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2021-12-21 16:09:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_9 [2021-12-21 16:09:43,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_9 [2021-12-21 16:09:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-12-21 16:09:43,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-12-21 16:09:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 16:09:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 16:09:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-21 16:09:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-12-21 16:09:43,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-12-21 16:09:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_8 [2021-12-21 16:09:43,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_8 [2021-12-21 16:09:43,751 INFO L130 BoogieDeclarations]: Found specification of procedure current_thread_info [2021-12-21 16:09:43,751 INFO L138 BoogieDeclarations]: Found implementation of procedure current_thread_info [2021-12-21 16:09:43,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 16:09:43,751 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_13 [2021-12-21 16:09:43,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_13 [2021-12-21 16:09:43,751 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-12-21 16:09:43,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-12-21 16:09:43,751 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_num [2021-12-21 16:09:43,752 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_num [2021-12-21 16:09:43,752 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_15 [2021-12-21 16:09:43,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_15 [2021-12-21 16:09:43,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 16:09:43,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 16:09:43,753 INFO L130 BoogieDeclarations]: Found specification of procedure kfree_skb [2021-12-21 16:09:43,753 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree_skb [2021-12-21 16:09:43,753 INFO L130 BoogieDeclarations]: Found specification of procedure lbs_remove_card [2021-12-21 16:09:43,753 INFO L138 BoogieDeclarations]: Found implementation of procedure lbs_remove_card [2021-12-21 16:09:43,754 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-21 16:09:43,754 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-21 16:09:43,754 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2021-12-21 16:09:43,754 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2021-12-21 16:09:43,754 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_receive [2021-12-21 16:09:43,755 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_receive [2021-12-21 16:09:43,755 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2021-12-21 16:09:43,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2021-12-21 16:09:43,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 16:09:43,756 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-12-21 16:09:43,756 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-12-21 16:09:43,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-21 16:09:43,756 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-21 16:09:43,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-21 16:09:43,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 16:09:43,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 16:09:44,164 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 16:09:44,166 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 16:09:44,392 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-21 16:09:45,035 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-12-21 16:09:45,668 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 16:09:45,677 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 16:09:45,691 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 16:09:45,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:09:45 BoogieIcfgContainer [2021-12-21 16:09:45,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 16:09:45,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 16:09:45,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 16:09:45,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 16:09:45,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:09:42" (1/3) ... [2021-12-21 16:09:45,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ddde184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:09:45, skipping insertion in model container [2021-12-21 16:09:45,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:43" (2/3) ... [2021-12-21 16:09:45,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ddde184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:09:45, skipping insertion in model container [2021-12-21 16:09:45,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:09:45" (3/3) ... [2021-12-21 16:09:45,699 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2021-12-21 16:09:45,702 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 16:09:45,702 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 16:09:45,733 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 16:09:45,737 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 [2021-12-21 16:09:45,737 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 16:09:45,762 INFO L276 IsEmpty]: Start isEmpty. Operand has 826 states, 603 states have (on average 1.3747927031509122) internal successors, (829), 633 states have internal predecessors, (829), 178 states have call successors, (178), 45 states have call predecessors, (178), 43 states have return successors, (172), 166 states have call predecessors, (172), 172 states have call successors, (172) [2021-12-21 16:09:45,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 16:09:45,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:09:45,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:09:45,771 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:09:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:09:45,777 INFO L85 PathProgramCache]: Analyzing trace with hash 527149613, now seen corresponding path program 1 times [2021-12-21 16:09:45,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:09:45,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440751909] [2021-12-21 16:09:45,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:45,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:09:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:46,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:09:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:46,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:09:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:09:46,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:09:46,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440751909] [2021-12-21 16:09:46,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440751909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:09:46,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:09:46,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:09:46,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797223418] [2021-12-21 16:09:46,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:09:46,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:09:46,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:09:46,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:09:46,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:09:46,237 INFO L87 Difference]: Start difference. First operand has 826 states, 603 states have (on average 1.3747927031509122) internal successors, (829), 633 states have internal predecessors, (829), 178 states have call successors, (178), 45 states have call predecessors, (178), 43 states have return successors, (172), 166 states have call predecessors, (172), 172 states have call successors, (172) Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 16:09:48,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:09:48,807 INFO L93 Difference]: Finished difference Result 2773 states and 4101 transitions. [2021-12-21 16:09:48,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:09:48,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-12-21 16:09:48,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:09:48,836 INFO L225 Difference]: With dead ends: 2773 [2021-12-21 16:09:48,836 INFO L226 Difference]: Without dead ends: 1924 [2021-12-21 16:09:48,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:09:48,856 INFO L933 BasicCegarLoop]: 1262 mSDtfsCounter, 2449 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 1179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2560 SdHoareTripleChecker+Valid, 3209 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1179 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 16:09:48,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2560 Valid, 3209 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1179 Valid, 1460 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-21 16:09:48,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2021-12-21 16:09:49,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1585. [2021-12-21 16:09:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1165 states have (on average 1.36137339055794) internal successors, (1586), 1205 states have internal predecessors, (1586), 336 states have call successors, (336), 84 states have call predecessors, (336), 83 states have return successors, (331), 319 states have call predecessors, (331), 331 states have call successors, (331) [2021-12-21 16:09:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2253 transitions. [2021-12-21 16:09:49,023 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2253 transitions. Word has length 29 [2021-12-21 16:09:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:09:49,024 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 2253 transitions. [2021-12-21 16:09:49,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 16:09:49,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2253 transitions. [2021-12-21 16:09:49,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 16:09:49,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:09:49,028 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 16:09:49,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 16:09:49,028 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:09:49,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:09:49,029 INFO L85 PathProgramCache]: Analyzing trace with hash 195057076, now seen corresponding path program 1 times [2021-12-21 16:09:49,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:09:49,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258123932] [2021-12-21 16:09:49,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:49,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:09:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:49,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:09:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:49,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:09:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:49,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:09:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 16:09:49,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:09:49,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258123932] [2021-12-21 16:09:49,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258123932] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:09:49,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:09:49,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:09:49,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334190863] [2021-12-21 16:09:49,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:09:49,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:09:49,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:09:49,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:09:49,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:09:49,194 INFO L87 Difference]: Start difference. First operand 1585 states and 2253 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:09:50,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:09:50,523 INFO L93 Difference]: Finished difference Result 1950 states and 2809 transitions. [2021-12-21 16:09:50,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 16:09:50,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 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 39 [2021-12-21 16:09:50,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:09:50,533 INFO L225 Difference]: With dead ends: 1950 [2021-12-21 16:09:50,534 INFO L226 Difference]: Without dead ends: 1937 [2021-12-21 16:09:50,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:09:50,541 INFO L933 BasicCegarLoop]: 1035 mSDtfsCounter, 1800 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1895 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 705 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:09:50,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1895 Valid, 1939 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [705 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 16:09:50,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-12-21 16:09:50,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1585. [2021-12-21 16:09:50,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1165 states have (on average 1.3605150214592274) internal successors, (1585), 1205 states have internal predecessors, (1585), 336 states have call successors, (336), 84 states have call predecessors, (336), 83 states have return successors, (331), 319 states have call predecessors, (331), 331 states have call successors, (331) [2021-12-21 16:09:50,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2252 transitions. [2021-12-21 16:09:50,612 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2252 transitions. Word has length 39 [2021-12-21 16:09:50,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:09:50,613 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 2252 transitions. [2021-12-21 16:09:50,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:09:50,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2252 transitions. [2021-12-21 16:09:50,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 16:09:50,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:09:50,617 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 16:09:50,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 16:09:50,617 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:09:50,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:09:50,618 INFO L85 PathProgramCache]: Analyzing trace with hash 252315378, now seen corresponding path program 1 times [2021-12-21 16:09:50,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:09:50,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984783493] [2021-12-21 16:09:50,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:50,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:09:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:09:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:09:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:09:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 16:09:50,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:09:50,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984783493] [2021-12-21 16:09:50,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984783493] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:09:50,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:09:50,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:09:50,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11879526] [2021-12-21 16:09:50,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:09:50,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:09:50,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:09:50,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:09:50,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:09:50,783 INFO L87 Difference]: Start difference. First operand 1585 states and 2252 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:09:53,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:09:53,522 INFO L93 Difference]: Finished difference Result 5389 states and 7961 transitions. [2021-12-21 16:09:53,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:09:53,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 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 39 [2021-12-21 16:09:53,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:09:53,538 INFO L225 Difference]: With dead ends: 5389 [2021-12-21 16:09:53,539 INFO L226 Difference]: Without dead ends: 3823 [2021-12-21 16:09:53,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:09:53,548 INFO L933 BasicCegarLoop]: 1237 mSDtfsCounter, 2530 mSDsluCounter, 1896 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 1187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2627 SdHoareTripleChecker+Valid, 3133 SdHoareTripleChecker+Invalid, 2595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1187 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-21 16:09:53,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2627 Valid, 3133 Invalid, 2595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1187 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-21 16:09:53,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3823 states. [2021-12-21 16:09:53,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3823 to 3298. [2021-12-21 16:09:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3298 states, 2431 states have (on average 1.3562320032908268) internal successors, (3297), 2507 states have internal predecessors, (3297), 678 states have call successors, (678), 165 states have call predecessors, (678), 188 states have return successors, (793), 669 states have call predecessors, (793), 673 states have call successors, (793) [2021-12-21 16:09:53,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3298 states to 3298 states and 4768 transitions. [2021-12-21 16:09:53,663 INFO L78 Accepts]: Start accepts. Automaton has 3298 states and 4768 transitions. Word has length 39 [2021-12-21 16:09:53,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:09:53,663 INFO L470 AbstractCegarLoop]: Abstraction has 3298 states and 4768 transitions. [2021-12-21 16:09:53,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:09:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3298 states and 4768 transitions. [2021-12-21 16:09:53,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-21 16:09:53,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:09:53,666 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 16:09:53,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 16:09:53,666 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:09:53,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:09:53,667 INFO L85 PathProgramCache]: Analyzing trace with hash -768568990, now seen corresponding path program 1 times [2021-12-21 16:09:53,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:09:53,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79513677] [2021-12-21 16:09:53,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:53,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:09:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:53,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:09:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:53,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:09:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:53,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:09:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 16:09:53,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:09:53,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79513677] [2021-12-21 16:09:53,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79513677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:09:53,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:09:53,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:09:53,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527604828] [2021-12-21 16:09:53,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:09:53,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:09:53,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:09:53,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:09:53,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:09:53,804 INFO L87 Difference]: Start difference. First operand 3298 states and 4768 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:09:56,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:09:56,238 INFO L93 Difference]: Finished difference Result 10872 states and 16391 transitions. [2021-12-21 16:09:56,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:09:56,238 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (4), 3 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 40 [2021-12-21 16:09:56,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:09:56,272 INFO L225 Difference]: With dead ends: 10872 [2021-12-21 16:09:56,273 INFO L226 Difference]: Without dead ends: 7593 [2021-12-21 16:09:56,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:09:56,288 INFO L933 BasicCegarLoop]: 1186 mSDtfsCounter, 2543 mSDsluCounter, 1835 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 1198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2646 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 2612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1198 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:09:56,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2646 Valid, 3021 Invalid, 2612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1198 Valid, 1414 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 16:09:56,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7593 states. [2021-12-21 16:09:56,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7593 to 6717. [2021-12-21 16:09:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6717 states, 4956 states have (on average 1.3520984665052462) internal successors, (6701), 5104 states have internal predecessors, (6701), 1362 states have call successors, (1362), 327 states have call predecessors, (1362), 398 states have return successors, (1817), 1369 states have call predecessors, (1817), 1357 states have call successors, (1817) [2021-12-21 16:09:56,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6717 states to 6717 states and 9880 transitions. [2021-12-21 16:09:56,555 INFO L78 Accepts]: Start accepts. Automaton has 6717 states and 9880 transitions. Word has length 40 [2021-12-21 16:09:56,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:09:56,557 INFO L470 AbstractCegarLoop]: Abstraction has 6717 states and 9880 transitions. [2021-12-21 16:09:56,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:09:56,557 INFO L276 IsEmpty]: Start isEmpty. Operand 6717 states and 9880 transitions. [2021-12-21 16:09:56,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 16:09:56,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:09:56,559 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 16:09:56,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 16:09:56,559 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:09:56,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:09:56,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1943758837, now seen corresponding path program 1 times [2021-12-21 16:09:56,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:09:56,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709240561] [2021-12-21 16:09:56,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:56,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:09:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:56,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:09:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:56,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:09:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:56,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:09:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 16:09:56,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:09:56,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709240561] [2021-12-21 16:09:56,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709240561] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:09:56,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:09:56,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:09:56,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175181885] [2021-12-21 16:09:56,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:09:56,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:09:56,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:09:56,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:09:56,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:09:56,694 INFO L87 Difference]: Start difference. First operand 6717 states and 9880 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:09:59,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:09:59,010 INFO L93 Difference]: Finished difference Result 7591 states and 11290 transitions. [2021-12-21 16:09:59,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:09:59,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (4), 3 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 41 [2021-12-21 16:09:59,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:09:59,044 INFO L225 Difference]: With dead ends: 7591 [2021-12-21 16:09:59,044 INFO L226 Difference]: Without dead ends: 7588 [2021-12-21 16:09:59,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:09:59,050 INFO L933 BasicCegarLoop]: 1197 mSDtfsCounter, 2532 mSDsluCounter, 1840 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 1197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2634 SdHoareTripleChecker+Valid, 3037 SdHoareTripleChecker+Invalid, 2607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1197 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:09:59,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2634 Valid, 3037 Invalid, 2607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1197 Valid, 1410 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 16:09:59,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7588 states. [2021-12-21 16:09:59,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7588 to 6718. [2021-12-21 16:09:59,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6718 states, 4957 states have (on average 1.3520274359491629) internal successors, (6702), 5105 states have internal predecessors, (6702), 1362 states have call successors, (1362), 327 states have call predecessors, (1362), 398 states have return successors, (1817), 1369 states have call predecessors, (1817), 1357 states have call successors, (1817) [2021-12-21 16:09:59,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6718 states to 6718 states and 9881 transitions. [2021-12-21 16:09:59,336 INFO L78 Accepts]: Start accepts. Automaton has 6718 states and 9881 transitions. Word has length 41 [2021-12-21 16:09:59,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:09:59,337 INFO L470 AbstractCegarLoop]: Abstraction has 6718 states and 9881 transitions. [2021-12-21 16:09:59,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:09:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 6718 states and 9881 transitions. [2021-12-21 16:09:59,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-21 16:09:59,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:09:59,340 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 16:09:59,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 16:09:59,340 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:09:59,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:09:59,342 INFO L85 PathProgramCache]: Analyzing trace with hash 126580421, now seen corresponding path program 1 times [2021-12-21 16:09:59,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:09:59,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372199014] [2021-12-21 16:09:59,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:59,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:09:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:59,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:09:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:59,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:09:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:59,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:09:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 16:09:59,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:09:59,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372199014] [2021-12-21 16:09:59,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372199014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:09:59,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:09:59,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:09:59,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166301903] [2021-12-21 16:09:59,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:09:59,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:09:59,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:09:59,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:09:59,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:09:59,481 INFO L87 Difference]: Start difference. First operand 6718 states and 9881 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:10:00,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:00,802 INFO L93 Difference]: Finished difference Result 7587 states and 11286 transitions. [2021-12-21 16:10:00,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:10:00,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 3 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 42 [2021-12-21 16:10:00,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:00,881 INFO L225 Difference]: With dead ends: 7587 [2021-12-21 16:10:00,882 INFO L226 Difference]: Without dead ends: 7584 [2021-12-21 16:10:00,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:10:00,886 INFO L933 BasicCegarLoop]: 1017 mSDtfsCounter, 1781 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 700 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1876 SdHoareTripleChecker+Valid, 1880 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 700 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:00,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1876 Valid, 1880 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [700 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 16:10:00,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7584 states. [2021-12-21 16:10:01,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7584 to 6717. [2021-12-21 16:10:01,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6717 states, 4957 states have (on average 1.3518257010288481) internal successors, (6701), 5104 states have internal predecessors, (6701), 1361 states have call successors, (1361), 327 states have call predecessors, (1361), 398 states have return successors, (1817), 1369 states have call predecessors, (1817), 1357 states have call successors, (1817) [2021-12-21 16:10:01,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6717 states to 6717 states and 9879 transitions. [2021-12-21 16:10:01,130 INFO L78 Accepts]: Start accepts. Automaton has 6717 states and 9879 transitions. Word has length 42 [2021-12-21 16:10:01,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:01,131 INFO L470 AbstractCegarLoop]: Abstraction has 6717 states and 9879 transitions. [2021-12-21 16:10:01,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:10:01,131 INFO L276 IsEmpty]: Start isEmpty. Operand 6717 states and 9879 transitions. [2021-12-21 16:10:01,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-21 16:10:01,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:01,133 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 16:10:01,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 16:10:01,133 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:01,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:01,134 INFO L85 PathProgramCache]: Analyzing trace with hash -371370760, now seen corresponding path program 1 times [2021-12-21 16:10:01,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:01,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109896311] [2021-12-21 16:10:01,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:01,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:01,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:01,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:10:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:01,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:10:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 16:10:01,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:01,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109896311] [2021-12-21 16:10:01,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109896311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:01,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:01,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:10:01,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380219513] [2021-12-21 16:10:01,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:01,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:10:01,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:01,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:10:01,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:10:01,248 INFO L87 Difference]: Start difference. First operand 6717 states and 9879 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:10:02,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:02,517 INFO L93 Difference]: Finished difference Result 7586 states and 11284 transitions. [2021-12-21 16:10:02,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:10:02,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 3 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 43 [2021-12-21 16:10:02,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:02,577 INFO L225 Difference]: With dead ends: 7586 [2021-12-21 16:10:02,577 INFO L226 Difference]: Without dead ends: 7574 [2021-12-21 16:10:02,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:10:02,579 INFO L933 BasicCegarLoop]: 1009 mSDtfsCounter, 1784 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1878 SdHoareTripleChecker+Valid, 1874 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:02,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1878 Valid, 1874 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [704 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 16:10:02,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7574 states. [2021-12-21 16:10:02,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7574 to 6707. [2021-12-21 16:10:02,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6707 states, 4948 states have (on average 1.3516572352465643) internal successors, (6688), 5094 states have internal predecessors, (6688), 1360 states have call successors, (1360), 327 states have call predecessors, (1360), 398 states have return successors, (1817), 1369 states have call predecessors, (1817), 1357 states have call successors, (1817) [2021-12-21 16:10:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6707 states to 6707 states and 9865 transitions. [2021-12-21 16:10:02,777 INFO L78 Accepts]: Start accepts. Automaton has 6707 states and 9865 transitions. Word has length 43 [2021-12-21 16:10:02,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:02,777 INFO L470 AbstractCegarLoop]: Abstraction has 6707 states and 9865 transitions. [2021-12-21 16:10:02,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:10:02,777 INFO L276 IsEmpty]: Start isEmpty. Operand 6707 states and 9865 transitions. [2021-12-21 16:10:02,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-21 16:10:02,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:02,786 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-21 16:10:02,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 16:10:02,786 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:02,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:02,787 INFO L85 PathProgramCache]: Analyzing trace with hash -134116982, now seen corresponding path program 1 times [2021-12-21 16:10:02,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:02,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704406819] [2021-12-21 16:10:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:02,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:02,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:10:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:03,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 16:10:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:03,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:03,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 16:10:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:03,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:03,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 16:10:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:03,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:03,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 16:10:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:03,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 16:10:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:03,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:10:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:03,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:10:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:03,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 16:10:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:03,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 16:10:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:03,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:10:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:03,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-21 16:10:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-21 16:10:03,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:03,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704406819] [2021-12-21 16:10:03,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704406819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:03,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:03,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 16:10:03,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170608735] [2021-12-21 16:10:03,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:03,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 16:10:03,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:03,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 16:10:03,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-21 16:10:03,154 INFO L87 Difference]: Start difference. First operand 6707 states and 9865 transitions. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (17), 9 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 16:10:05,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:05,501 INFO L93 Difference]: Finished difference Result 16108 states and 23839 transitions. [2021-12-21 16:10:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 16:10:05,502 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (17), 9 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 143 [2021-12-21 16:10:05,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:05,553 INFO L225 Difference]: With dead ends: 16108 [2021-12-21 16:10:05,553 INFO L226 Difference]: Without dead ends: 9420 [2021-12-21 16:10:05,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-12-21 16:10:05,571 INFO L933 BasicCegarLoop]: 1034 mSDtfsCounter, 2390 mSDsluCounter, 2361 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 1491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2454 SdHoareTripleChecker+Valid, 3395 SdHoareTripleChecker+Invalid, 3063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1491 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:05,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2454 Valid, 3395 Invalid, 3063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1491 Valid, 1572 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-21 16:10:05,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9420 states. [2021-12-21 16:10:05,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9420 to 7983. [2021-12-21 16:10:05,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7983 states, 5905 states have (on average 1.3483488569009314) internal successors, (7962), 6083 states have internal predecessors, (7962), 1550 states have call successors, (1550), 352 states have call predecessors, (1550), 527 states have return successors, (2169), 1643 states have call predecessors, (2169), 1547 states have call successors, (2169) [2021-12-21 16:10:05,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7983 states to 7983 states and 11681 transitions. [2021-12-21 16:10:05,844 INFO L78 Accepts]: Start accepts. Automaton has 7983 states and 11681 transitions. Word has length 143 [2021-12-21 16:10:05,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:05,844 INFO L470 AbstractCegarLoop]: Abstraction has 7983 states and 11681 transitions. [2021-12-21 16:10:05,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (17), 9 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 16:10:05,845 INFO L276 IsEmpty]: Start isEmpty. Operand 7983 states and 11681 transitions. [2021-12-21 16:10:05,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-21 16:10:05,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:05,856 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-21 16:10:05,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 16:10:05,856 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:05,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:05,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1543029914, now seen corresponding path program 1 times [2021-12-21 16:10:05,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:05,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639746620] [2021-12-21 16:10:05,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:05,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:06,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:06,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:10:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:06,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:10:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:06,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 16:10:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:06,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:06,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 16:10:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:06,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:06,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-21 16:10:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:06,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:06,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 16:10:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:06,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-21 16:10:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:06,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:10:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:06,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:10:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:06,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 16:10:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:06,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 16:10:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:06,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:10:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 16:10:06,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:06,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639746620] [2021-12-21 16:10:06,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639746620] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:10:06,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358033585] [2021-12-21 16:10:06,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:06,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:06,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:10:06,186 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) [2021-12-21 16:10:06,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 16:10:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:06,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 2718 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 16:10:06,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:10:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 16:10:07,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:10:07,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358033585] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:07,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:10:07,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2021-12-21 16:10:07,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933017206] [2021-12-21 16:10:07,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:07,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:10:07,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:07,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:10:07,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-21 16:10:07,016 INFO L87 Difference]: Start difference. First operand 7983 states and 11681 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 16:10:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:07,704 INFO L93 Difference]: Finished difference Result 23983 states and 35141 transitions. [2021-12-21 16:10:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:10:07,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 152 [2021-12-21 16:10:07,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:07,767 INFO L225 Difference]: With dead ends: 23983 [2021-12-21 16:10:07,768 INFO L226 Difference]: Without dead ends: 16023 [2021-12-21 16:10:07,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-21 16:10:07,801 INFO L933 BasicCegarLoop]: 2213 mSDtfsCounter, 1438 mSDsluCounter, 5041 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1467 SdHoareTripleChecker+Valid, 7254 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:07,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1467 Valid, 7254 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 16:10:07,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16023 states. [2021-12-21 16:10:08,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16023 to 8031. [2021-12-21 16:10:08,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8031 states, 5937 states have (on average 1.346471281792151) internal successors, (7994), 6107 states have internal predecessors, (7994), 1566 states have call successors, (1566), 352 states have call predecessors, (1566), 527 states have return successors, (2203), 1659 states have call predecessors, (2203), 1563 states have call successors, (2203) [2021-12-21 16:10:08,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8031 states to 8031 states and 11763 transitions. [2021-12-21 16:10:08,284 INFO L78 Accepts]: Start accepts. Automaton has 8031 states and 11763 transitions. Word has length 152 [2021-12-21 16:10:08,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:08,285 INFO L470 AbstractCegarLoop]: Abstraction has 8031 states and 11763 transitions. [2021-12-21 16:10:08,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 16:10:08,286 INFO L276 IsEmpty]: Start isEmpty. Operand 8031 states and 11763 transitions. [2021-12-21 16:10:08,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-21 16:10:08,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:08,295 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-21 16:10:08,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 16:10:08,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:08,505 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:08,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:08,505 INFO L85 PathProgramCache]: Analyzing trace with hash 531912664, now seen corresponding path program 1 times [2021-12-21 16:10:08,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:08,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029751407] [2021-12-21 16:10:08,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:08,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:08,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:08,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:10:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:08,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:10:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:08,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 16:10:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:08,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:08,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 16:10:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:08,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:08,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-21 16:10:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:08,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:08,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 16:10:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:08,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-21 16:10:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:08,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:10:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:08,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:10:08,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:08,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 16:10:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:08,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 16:10:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:08,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:10:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 16:10:08,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:08,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029751407] [2021-12-21 16:10:08,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029751407] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:10:08,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589835615] [2021-12-21 16:10:08,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:08,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:08,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:10:08,876 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) [2021-12-21 16:10:08,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 16:10:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:09,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 2713 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-21 16:10:09,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:10:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 16:10:09,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:10:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 16:10:10,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589835615] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 16:10:10,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 16:10:10,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 29 [2021-12-21 16:10:10,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934607358] [2021-12-21 16:10:10,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 16:10:10,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-21 16:10:10,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:10,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-21 16:10:10,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-12-21 16:10:10,252 INFO L87 Difference]: Start difference. First operand 8031 states and 11763 transitions. Second operand has 29 states, 29 states have (on average 6.551724137931035) internal successors, (190), 16 states have internal predecessors, (190), 3 states have call successors, (41), 9 states have call predecessors, (41), 8 states have return successors, (34), 9 states have call predecessors, (34), 3 states have call successors, (34) [2021-12-21 16:10:17,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:17,493 INFO L93 Difference]: Finished difference Result 23225 states and 36949 transitions. [2021-12-21 16:10:17,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-21 16:10:17,494 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.551724137931035) internal successors, (190), 16 states have internal predecessors, (190), 3 states have call successors, (41), 9 states have call predecessors, (41), 8 states have return successors, (34), 9 states have call predecessors, (34), 3 states have call successors, (34) Word has length 152 [2021-12-21 16:10:17,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:17,559 INFO L225 Difference]: With dead ends: 23225 [2021-12-21 16:10:17,559 INFO L226 Difference]: Without dead ends: 15201 [2021-12-21 16:10:17,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=1668, Unknown=0, NotChecked=0, Total=1892 [2021-12-21 16:10:17,597 INFO L933 BasicCegarLoop]: 1278 mSDtfsCounter, 2906 mSDsluCounter, 20924 mSDsCounter, 0 mSdLazyCounter, 8681 mSolverCounterSat, 1641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3049 SdHoareTripleChecker+Valid, 22202 SdHoareTripleChecker+Invalid, 10322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1641 IncrementalHoareTripleChecker+Valid, 8681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:17,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3049 Valid, 22202 Invalid, 10322 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1641 Valid, 8681 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-12-21 16:10:17,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15201 states. [2021-12-21 16:10:18,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15201 to 8095. [2021-12-21 16:10:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8095 states, 5989 states have (on average 1.3434630155284688) internal successors, (8046), 6155 states have internal predecessors, (8046), 1566 states have call successors, (1566), 352 states have call predecessors, (1566), 539 states have return successors, (2243), 1675 states have call predecessors, (2243), 1563 states have call successors, (2243) [2021-12-21 16:10:18,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8095 states to 8095 states and 11855 transitions. [2021-12-21 16:10:18,239 INFO L78 Accepts]: Start accepts. Automaton has 8095 states and 11855 transitions. Word has length 152 [2021-12-21 16:10:18,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:18,240 INFO L470 AbstractCegarLoop]: Abstraction has 8095 states and 11855 transitions. [2021-12-21 16:10:18,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.551724137931035) internal successors, (190), 16 states have internal predecessors, (190), 3 states have call successors, (41), 9 states have call predecessors, (41), 8 states have return successors, (34), 9 states have call predecessors, (34), 3 states have call successors, (34) [2021-12-21 16:10:18,240 INFO L276 IsEmpty]: Start isEmpty. Operand 8095 states and 11855 transitions. [2021-12-21 16:10:18,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-21 16:10:18,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:18,249 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-21 16:10:18,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 16:10:18,463 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,SelfDestructingSolverStorable9 [2021-12-21 16:10:18,463 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:18,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:18,464 INFO L85 PathProgramCache]: Analyzing trace with hash 903270820, now seen corresponding path program 1 times [2021-12-21 16:10:18,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:18,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449793858] [2021-12-21 16:10:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:18,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:18,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:18,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:10:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:18,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:10:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:18,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 16:10:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:18,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:18,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:18,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 16:10:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:18,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:18,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:18,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 16:10:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:18,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:18,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 16:10:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:18,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 16:10:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:18,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:10:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:18,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:10:18,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:18,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 16:10:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:18,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 16:10:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:18,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:10:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 16:10:18,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:18,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449793858] [2021-12-21 16:10:18,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449793858] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:18,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:18,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 16:10:18,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301209718] [2021-12-21 16:10:18,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:18,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 16:10:18,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:18,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 16:10:18,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-21 16:10:18,792 INFO L87 Difference]: Start difference. First operand 8095 states and 11855 transitions. Second operand has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 4 states have internal predecessors, (109), 3 states have call successors, (18), 9 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-21 16:10:21,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:21,784 INFO L93 Difference]: Finished difference Result 17480 states and 25827 transitions. [2021-12-21 16:10:21,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 16:10:21,784 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 4 states have internal predecessors, (109), 3 states have call successors, (18), 9 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 164 [2021-12-21 16:10:21,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:21,823 INFO L225 Difference]: With dead ends: 17480 [2021-12-21 16:10:21,823 INFO L226 Difference]: Without dead ends: 9408 [2021-12-21 16:10:21,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-12-21 16:10:21,845 INFO L933 BasicCegarLoop]: 1011 mSDtfsCounter, 2180 mSDsluCounter, 4626 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 1564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2235 SdHoareTripleChecker+Valid, 5637 SdHoareTripleChecker+Invalid, 4109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1564 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:21,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2235 Valid, 5637 Invalid, 4109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1564 Valid, 2545 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 16:10:21,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9408 states. [2021-12-21 16:10:22,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9408 to 8135. [2021-12-21 16:10:22,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8135 states, 6021 states have (on average 1.3429662846703205) internal successors, (8086), 6179 states have internal predecessors, (8086), 1574 states have call successors, (1574), 352 states have call predecessors, (1574), 539 states have return successors, (2251), 1691 states have call predecessors, (2251), 1571 states have call successors, (2251) [2021-12-21 16:10:22,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8135 states to 8135 states and 11911 transitions. [2021-12-21 16:10:22,255 INFO L78 Accepts]: Start accepts. Automaton has 8135 states and 11911 transitions. Word has length 164 [2021-12-21 16:10:22,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:22,255 INFO L470 AbstractCegarLoop]: Abstraction has 8135 states and 11911 transitions. [2021-12-21 16:10:22,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 4 states have internal predecessors, (109), 3 states have call successors, (18), 9 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-21 16:10:22,255 INFO L276 IsEmpty]: Start isEmpty. Operand 8135 states and 11911 transitions. [2021-12-21 16:10:22,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-21 16:10:22,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:22,266 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 16:10:22,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 16:10:22,266 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:22,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:22,266 INFO L85 PathProgramCache]: Analyzing trace with hash 795146250, now seen corresponding path program 1 times [2021-12-21 16:10:22,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:22,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225647535] [2021-12-21 16:10:22,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:22,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:10:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:10:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 16:10:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 16:10:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 16:10:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 16:10:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 16:10:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:10:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:10:22,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 16:10:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 16:10:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:10:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-21 16:10:22,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:22,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225647535] [2021-12-21 16:10:22,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225647535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:22,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:22,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 16:10:22,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112747141] [2021-12-21 16:10:22,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:22,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 16:10:22,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:22,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 16:10:22,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-21 16:10:22,612 INFO L87 Difference]: Start difference. First operand 8135 states and 11911 transitions. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (18), 9 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-21 16:10:25,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:25,190 INFO L93 Difference]: Finished difference Result 17522 states and 25861 transitions. [2021-12-21 16:10:25,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 16:10:25,191 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (18), 9 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 170 [2021-12-21 16:10:25,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:25,227 INFO L225 Difference]: With dead ends: 17522 [2021-12-21 16:10:25,227 INFO L226 Difference]: Without dead ends: 9406 [2021-12-21 16:10:25,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-12-21 16:10:25,250 INFO L933 BasicCegarLoop]: 1008 mSDtfsCounter, 1769 mSDsluCounter, 3717 mSDsCounter, 0 mSdLazyCounter, 2146 mSolverCounterSat, 1232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1824 SdHoareTripleChecker+Valid, 4725 SdHoareTripleChecker+Invalid, 3378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1232 IncrementalHoareTripleChecker+Valid, 2146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:25,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1824 Valid, 4725 Invalid, 3378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1232 Valid, 2146 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 16:10:25,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9406 states. [2021-12-21 16:10:25,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9406 to 8136. [2021-12-21 16:10:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8136 states, 6022 states have (on average 1.3429093324476917) internal successors, (8087), 6180 states have internal predecessors, (8087), 1574 states have call successors, (1574), 352 states have call predecessors, (1574), 539 states have return successors, (2251), 1691 states have call predecessors, (2251), 1571 states have call successors, (2251) [2021-12-21 16:10:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8136 states to 8136 states and 11912 transitions. [2021-12-21 16:10:25,787 INFO L78 Accepts]: Start accepts. Automaton has 8136 states and 11912 transitions. Word has length 170 [2021-12-21 16:10:25,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:25,787 INFO L470 AbstractCegarLoop]: Abstraction has 8136 states and 11912 transitions. [2021-12-21 16:10:25,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (18), 9 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-21 16:10:25,788 INFO L276 IsEmpty]: Start isEmpty. Operand 8136 states and 11912 transitions. [2021-12-21 16:10:25,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-21 16:10:25,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:25,797 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 16:10:25,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 16:10:25,798 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:25,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:25,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1600341639, now seen corresponding path program 1 times [2021-12-21 16:10:25,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:25,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49937544] [2021-12-21 16:10:25,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:25,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:25,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:25,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:10:25,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:26,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:10:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:26,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 16:10:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:26,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:26,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:26,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 16:10:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:26,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:26,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:26,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-21 16:10:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:26,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:26,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:26,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 16:10:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:26,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-21 16:10:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:26,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:10:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:26,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:10:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:26,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 16:10:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:26,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 16:10:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:26,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:10:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-21 16:10:26,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:26,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49937544] [2021-12-21 16:10:26,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49937544] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:10:26,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699892549] [2021-12-21 16:10:26,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:26,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:26,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:10:26,184 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) [2021-12-21 16:10:26,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 16:10:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:26,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 2806 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 16:10:26,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:10:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 16:10:26,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:10:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 16:10:27,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699892549] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 16:10:27,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 16:10:27,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12, 4] total 14 [2021-12-21 16:10:27,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719559485] [2021-12-21 16:10:27,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:27,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:10:27,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:27,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:10:27,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-21 16:10:27,233 INFO L87 Difference]: Start difference. First operand 8136 states and 11912 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-21 16:10:27,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:27,550 INFO L93 Difference]: Finished difference Result 16492 states and 24192 transitions. [2021-12-21 16:10:27,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:10:27,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 171 [2021-12-21 16:10:27,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:27,580 INFO L225 Difference]: With dead ends: 16492 [2021-12-21 16:10:27,580 INFO L226 Difference]: Without dead ends: 8380 [2021-12-21 16:10:27,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 369 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-21 16:10:27,650 INFO L933 BasicCegarLoop]: 1289 mSDtfsCounter, 256 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 2273 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:27,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 2273 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:10:27,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8380 states. [2021-12-21 16:10:27,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8380 to 8136. [2021-12-21 16:10:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8136 states, 6022 states have (on average 1.3415808701428098) internal successors, (8079), 6172 states have internal predecessors, (8079), 1574 states have call successors, (1574), 352 states have call predecessors, (1574), 539 states have return successors, (2251), 1691 states have call predecessors, (2251), 1571 states have call successors, (2251) [2021-12-21 16:10:28,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8136 states to 8136 states and 11904 transitions. [2021-12-21 16:10:28,004 INFO L78 Accepts]: Start accepts. Automaton has 8136 states and 11904 transitions. Word has length 171 [2021-12-21 16:10:28,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:28,005 INFO L470 AbstractCegarLoop]: Abstraction has 8136 states and 11904 transitions. [2021-12-21 16:10:28,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-21 16:10:28,005 INFO L276 IsEmpty]: Start isEmpty. Operand 8136 states and 11904 transitions. [2021-12-21 16:10:28,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-21 16:10:28,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:28,017 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 16:10:28,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 16:10:28,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:28,231 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:28,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:28,232 INFO L85 PathProgramCache]: Analyzing trace with hash -933269753, now seen corresponding path program 1 times [2021-12-21 16:10:28,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:28,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101287589] [2021-12-21 16:10:28,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:28,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:10:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:10:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 16:10:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 16:10:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 16:10:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 16:10:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 16:10:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-21 16:10:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:10:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:10:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 16:10:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 16:10:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:10:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-21 16:10:28,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:28,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101287589] [2021-12-21 16:10:28,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101287589] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:10:28,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006700121] [2021-12-21 16:10:28,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:28,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:28,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:10:28,595 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) [2021-12-21 16:10:28,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 16:10:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:29,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 2894 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 16:10:29,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:10:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-21 16:10:29,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:10:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-21 16:10:29,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006700121] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 16:10:29,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 16:10:29,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 18 [2021-12-21 16:10:29,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813012831] [2021-12-21 16:10:29,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 16:10:29,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 16:10:29,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:29,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 16:10:29,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-12-21 16:10:29,785 INFO L87 Difference]: Start difference. First operand 8136 states and 11904 transitions. Second operand has 18 states, 18 states have (on average 9.61111111111111) internal successors, (173), 10 states have internal predecessors, (173), 2 states have call successors, (49), 10 states have call predecessors, (49), 5 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-12-21 16:10:34,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:34,127 INFO L93 Difference]: Finished difference Result 17527 states and 25852 transitions. [2021-12-21 16:10:34,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 16:10:34,127 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.61111111111111) internal successors, (173), 10 states have internal predecessors, (173), 2 states have call successors, (49), 10 states have call predecessors, (49), 5 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 176 [2021-12-21 16:10:34,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:34,160 INFO L225 Difference]: With dead ends: 17527 [2021-12-21 16:10:34,160 INFO L226 Difference]: Without dead ends: 9409 [2021-12-21 16:10:34,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 380 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2021-12-21 16:10:34,182 INFO L933 BasicCegarLoop]: 1001 mSDtfsCounter, 2205 mSDsluCounter, 6303 mSDsCounter, 0 mSdLazyCounter, 3472 mSolverCounterSat, 1563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2260 SdHoareTripleChecker+Valid, 7304 SdHoareTripleChecker+Invalid, 5035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1563 IncrementalHoareTripleChecker+Valid, 3472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:34,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2260 Valid, 7304 Invalid, 5035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1563 Valid, 3472 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-21 16:10:34,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9409 states. [2021-12-21 16:10:34,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9409 to 8139. [2021-12-21 16:10:34,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8139 states, 6025 states have (on average 1.3414107883817428) internal successors, (8082), 6175 states have internal predecessors, (8082), 1574 states have call successors, (1574), 352 states have call predecessors, (1574), 539 states have return successors, (2251), 1691 states have call predecessors, (2251), 1571 states have call successors, (2251) [2021-12-21 16:10:34,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8139 states to 8139 states and 11907 transitions. [2021-12-21 16:10:34,631 INFO L78 Accepts]: Start accepts. Automaton has 8139 states and 11907 transitions. Word has length 176 [2021-12-21 16:10:34,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:34,631 INFO L470 AbstractCegarLoop]: Abstraction has 8139 states and 11907 transitions. [2021-12-21 16:10:34,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.61111111111111) internal successors, (173), 10 states have internal predecessors, (173), 2 states have call successors, (49), 10 states have call predecessors, (49), 5 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-12-21 16:10:34,631 INFO L276 IsEmpty]: Start isEmpty. Operand 8139 states and 11907 transitions. [2021-12-21 16:10:34,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-21 16:10:34,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:34,641 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 16:10:34,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-21 16:10:34,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:34,865 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:34,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:34,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1027041450, now seen corresponding path program 2 times [2021-12-21 16:10:34,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:34,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55905669] [2021-12-21 16:10:34,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:34,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms