./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--can--usb--usb_8dev.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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--can--usb--usb_8dev.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 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:55:50,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:55:50,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:55:50,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:55:50,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:55:50,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:55:50,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:55:50,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:55:50,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:55:50,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:55:50,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:55:50,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:55:50,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:55:50,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:55:50,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:55:50,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:55:50,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:55:50,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:55:50,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:55:50,412 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:55:50,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:55:50,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:55:50,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:55:50,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:55:50,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:55:50,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:55:50,421 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:55:50,422 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:55:50,422 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:55:50,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:55:50,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:55:50,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:55:50,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:55:50,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:55:50,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:55:50,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:55:50,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:55:50,426 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:55:50,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:55:50,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:55:50,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:55:50,428 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-16 03:55:50,451 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:55:50,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:55:50,456 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:55:50,456 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:55:50,457 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:55:50,457 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:55:50,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:55:50,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:55:50,457 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:55:50,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:55:50,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:55:50,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:55:50,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:55:50,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:55:50,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:55:50,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:55:50,459 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:55:50,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:55:50,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:55:50,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:55:50,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:55:50,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:55:50,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:55:50,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:55:50,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:55:50,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:55:50,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:55:50,461 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:55:50,461 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:55:50,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:55:50,461 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:55:50,461 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 [2021-12-16 03:55:50,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:55:50,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:55:50,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:55:50,664 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:55:50,664 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:55:50,665 INFO L432 ainManager$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--can--usb--usb_8dev.ko-entry_point.cil.out.i [2021-12-16 03:55:50,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe15015d3/4c6e4c1e205c42b59998ec2047268170/FLAG78b2f69de [2021-12-16 03:55:51,266 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:55:51,267 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--can--usb--usb_8dev.ko-entry_point.cil.out.i [2021-12-16 03:55:51,299 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe15015d3/4c6e4c1e205c42b59998ec2047268170/FLAG78b2f69de [2021-12-16 03:55:51,739 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe15015d3/4c6e4c1e205c42b59998ec2047268170 [2021-12-16 03:55:51,740 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:55:51,742 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:55:51,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:55:51,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:55:51,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:55:51,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:55:51" (1/1) ... [2021-12-16 03:55:51,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21c4c5ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:55:51, skipping insertion in model container [2021-12-16 03:55:51,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:55:51" (1/1) ... [2021-12-16 03:55:51,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:55:51,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:55:52,448 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--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2021-12-16 03:55:52,706 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:55:52,763 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:55:52,848 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--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2021-12-16 03:55:52,955 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:55:53,004 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:55:53,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:55:53 WrapperNode [2021-12-16 03:55:53,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:55:53,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:55:53,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:55:53,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:55:53,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:55:53" (1/1) ... [2021-12-16 03:55:53,049 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:55:53" (1/1) ... [2021-12-16 03:55:53,129 INFO L137 Inliner]: procedures = 175, calls = 797, calls flagged for inlining = 84, calls inlined = 84, statements flattened = 2205 [2021-12-16 03:55:53,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:55:53,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:55:53,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:55:53,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:55:53,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:55:53" (1/1) ... [2021-12-16 03:55:53,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:55:53" (1/1) ... [2021-12-16 03:55:53,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:55:53" (1/1) ... [2021-12-16 03:55:53,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:55:53" (1/1) ... [2021-12-16 03:55:53,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:55:53" (1/1) ... [2021-12-16 03:55:53,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:55:53" (1/1) ... [2021-12-16 03:55:53,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:55:53" (1/1) ... [2021-12-16 03:55:53,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:55:53,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:55:53,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:55:53,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:55:53,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:55:53" (1/1) ... [2021-12-16 03:55:53,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:55:53,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:55:53,312 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) [2021-12-16 03:55:53,314 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 [2021-12-16 03:55:53,337 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-12-16 03:55:53,337 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-12-16 03:55:53,337 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2021-12-16 03:55:53,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2021-12-16 03:55:53,338 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_2 [2021-12-16 03:55:53,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_2 [2021-12-16 03:55:53,338 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_15 [2021-12-16 03:55:53,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_15 [2021-12-16 03:55:53,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-16 03:55:53,338 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2021-12-16 03:55:53,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2021-12-16 03:55:53,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-16 03:55:53,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-16 03:55:53,339 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2021-12-16 03:55:53,339 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2021-12-16 03:55:53,339 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-16 03:55:53,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-16 03:55:53,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:55:53,340 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-12-16 03:55:53,340 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-12-16 03:55:53,340 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2021-12-16 03:55:53,340 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2021-12-16 03:55:53,340 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-12-16 03:55:53,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-12-16 03:55:53,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-16 03:55:53,341 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-16 03:55:53,341 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-16 03:55:53,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-16 03:55:53,341 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-16 03:55:53,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-16 03:55:53,341 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2021-12-16 03:55:53,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2021-12-16 03:55:53,342 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_read_bulk_callback [2021-12-16 03:55:53,342 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_read_bulk_callback [2021-12-16 03:55:53,342 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2021-12-16 03:55:53,342 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2021-12-16 03:55:53,342 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2021-12-16 03:55:53,342 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2021-12-16 03:55:53,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:55:53,343 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-16 03:55:53,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-16 03:55:53,343 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-16 03:55:53,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-16 03:55:53,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-16 03:55:53,343 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-16 03:55:53,343 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 03:55:53,343 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 03:55:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-12-16 03:55:53,344 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-12-16 03:55:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 03:55:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-12-16 03:55:53,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-12-16 03:55:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2021-12-16 03:55:53,344 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2021-12-16 03:55:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:55:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-12-16 03:55:53,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-12-16 03:55:53,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:55:53,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 03:55:53,347 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-12-16 03:55:53,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-12-16 03:55:53,347 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-12-16 03:55:53,347 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-12-16 03:55:53,347 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2021-12-16 03:55:53,347 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2021-12-16 03:55:53,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 03:55:53,348 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2021-12-16 03:55:53,348 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2021-12-16 03:55:53,348 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2021-12-16 03:55:53,348 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2021-12-16 03:55:53,348 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2021-12-16 03:55:53,349 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2021-12-16 03:55:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure can_led_event [2021-12-16 03:55:53,349 INFO L138 BoogieDeclarations]: Found implementation of procedure can_led_event [2021-12-16 03:55:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:55:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 03:55:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_disconnect [2021-12-16 03:55:53,349 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_disconnect [2021-12-16 03:55:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2021-12-16 03:55:53,349 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2021-12-16 03:55:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-12-16 03:55:53,350 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-12-16 03:55:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2021-12-16 03:55:53,350 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2021-12-16 03:55:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-12-16 03:55:53,350 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-12-16 03:55:53,351 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2021-12-16 03:55:53,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2021-12-16 03:55:53,351 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2021-12-16 03:55:53,351 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2021-12-16 03:55:53,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:55:53,352 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2021-12-16 03:55:53,352 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2021-12-16 03:55:53,352 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-12-16 03:55:53,353 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-12-16 03:55:53,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-16 03:55:53,353 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_send_cmd [2021-12-16 03:55:53,353 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_send_cmd [2021-12-16 03:55:53,353 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-16 03:55:53,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-16 03:55:53,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:55:53,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:55:53,354 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_cmd_open [2021-12-16 03:55:53,354 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_cmd_open [2021-12-16 03:55:53,709 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:55:53,712 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:55:53,874 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-16 03:55:54,249 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-12-16 03:55:55,915 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:55:55,927 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:55:55,927 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-16 03:55:55,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:55:55 BoogieIcfgContainer [2021-12-16 03:55:55,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:55:55,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:55:55,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:55:55,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:55:55,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:55:51" (1/3) ... [2021-12-16 03:55:55,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b12d7c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:55:55, skipping insertion in model container [2021-12-16 03:55:55,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:55:53" (2/3) ... [2021-12-16 03:55:55,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b12d7c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:55:55, skipping insertion in model container [2021-12-16 03:55:55,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:55:55" (3/3) ... [2021-12-16 03:55:55,940 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2021-12-16 03:55:55,945 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:55:55,946 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:55:56,002 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:55:56,006 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 [2021-12-16 03:55:56,006 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 03:55:56,033 INFO L276 IsEmpty]: Start isEmpty. Operand has 653 states, 477 states have (on average 1.329140461215933) internal successors, (634), 496 states have internal predecessors, (634), 132 states have call successors, (132), 44 states have call predecessors, (132), 42 states have return successors, (126), 125 states have call predecessors, (126), 126 states have call successors, (126) [2021-12-16 03:55:56,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 03:55:56,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:55:56,039 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] [2021-12-16 03:55:56,040 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:55:56,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:55:56,044 INFO L85 PathProgramCache]: Analyzing trace with hash -583991121, now seen corresponding path program 1 times [2021-12-16 03:55:56,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:55:56,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345678858] [2021-12-16 03:55:56,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:55:56,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:55:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:55:56,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:55:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:55:56,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 03:55:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:55:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 03:55:56,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:55:56,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345678858] [2021-12-16 03:55:56,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345678858] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:55:56,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:55:56,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 03:55:56,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181009491] [2021-12-16 03:55:56,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:55:56,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:55:56,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:55:56,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:55:56,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:55:56,445 INFO L87 Difference]: Start difference. First operand has 653 states, 477 states have (on average 1.329140461215933) internal successors, (634), 496 states have internal predecessors, (634), 132 states have call successors, (132), 44 states have call predecessors, (132), 42 states have return successors, (126), 125 states have call predecessors, (126), 126 states have call successors, (126) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 03:55:59,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:55:59,366 INFO L93 Difference]: Finished difference Result 2021 states and 2855 transitions. [2021-12-16 03:55:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:55:59,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 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 28 [2021-12-16 03:55:59,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:55:59,384 INFO L225 Difference]: With dead ends: 2021 [2021-12-16 03:55:59,384 INFO L226 Difference]: Without dead ends: 1349 [2021-12-16 03:55:59,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:55:59,393 INFO L933 BasicCegarLoop]: 961 mSDtfsCounter, 1115 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 2097 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-16 03:55:59,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 2097 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-16 03:55:59,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2021-12-16 03:55:59,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1243. [2021-12-16 03:55:59,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 917 states have (on average 1.311886586695747) internal successors, (1203), 935 states have internal predecessors, (1203), 243 states have call successors, (243), 83 states have call predecessors, (243), 82 states have return successors, (238), 236 states have call predecessors, (238), 238 states have call successors, (238) [2021-12-16 03:55:59,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1684 transitions. [2021-12-16 03:55:59,515 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1684 transitions. Word has length 28 [2021-12-16 03:55:59,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:55:59,516 INFO L470 AbstractCegarLoop]: Abstraction has 1243 states and 1684 transitions. [2021-12-16 03:55:59,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 03:55:59,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1684 transitions. [2021-12-16 03:55:59,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-16 03:55:59,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:55:59,524 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:55:59,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:55:59,524 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:55:59,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:55:59,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1373222682, now seen corresponding path program 1 times [2021-12-16 03:55:59,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:55:59,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312540068] [2021-12-16 03:55:59,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:55:59,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:55:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:55:59,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:55:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:55:59,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 03:55:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:55:59,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:55:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:55:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 03:55:59,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:55:59,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312540068] [2021-12-16 03:55:59,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312540068] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:55:59,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:55:59,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 03:55:59,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176793312] [2021-12-16 03:55:59,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:55:59,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:55:59,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:55:59,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:55:59,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:55:59,705 INFO L87 Difference]: Start difference. First operand 1243 states and 1684 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 03:56:02,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:56:02,017 INFO L93 Difference]: Finished difference Result 3926 states and 5435 transitions. [2021-12-16 03:56:02,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:56:02,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2021-12-16 03:56:02,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:56:02,030 INFO L225 Difference]: With dead ends: 3926 [2021-12-16 03:56:02,031 INFO L226 Difference]: Without dead ends: 2690 [2021-12-16 03:56:02,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:56:02,036 INFO L933 BasicCegarLoop]: 1249 mSDtfsCounter, 1019 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 2496 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:56:02,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1118 Valid, 2496 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-16 03:56:02,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-12-16 03:56:02,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2468. [2021-12-16 03:56:02,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 1824 states have (on average 1.3103070175438596) internal successors, (2390), 1856 states have internal predecessors, (2390), 479 states have call successors, (479), 165 states have call predecessors, (479), 164 states have return successors, (488), 470 states have call predecessors, (488), 474 states have call successors, (488) [2021-12-16 03:56:02,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 3357 transitions. [2021-12-16 03:56:02,144 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 3357 transitions. Word has length 38 [2021-12-16 03:56:02,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:56:02,144 INFO L470 AbstractCegarLoop]: Abstraction has 2468 states and 3357 transitions. [2021-12-16 03:56:02,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 03:56:02,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 3357 transitions. [2021-12-16 03:56:02,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-16 03:56:02,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:56:02,148 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:56:02,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 03:56:02,149 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:56:02,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:56:02,149 INFO L85 PathProgramCache]: Analyzing trace with hash 379434109, now seen corresponding path program 1 times [2021-12-16 03:56:02,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:56:02,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745615901] [2021-12-16 03:56:02,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:56:02,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:56:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:02,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:56:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:02,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 03:56:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:02,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:56:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 03:56:02,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:56:02,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745615901] [2021-12-16 03:56:02,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745615901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:56:02,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:56:02,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 03:56:02,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319396146] [2021-12-16 03:56:02,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:56:02,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:56:02,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:56:02,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:56:02,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:56:02,284 INFO L87 Difference]: Start difference. First operand 2468 states and 3357 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 03:56:04,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:56:04,522 INFO L93 Difference]: Finished difference Result 2682 states and 3736 transitions. [2021-12-16 03:56:04,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 03:56:04,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-12-16 03:56:04,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:56:04,533 INFO L225 Difference]: With dead ends: 2682 [2021-12-16 03:56:04,533 INFO L226 Difference]: Without dead ends: 2679 [2021-12-16 03:56:04,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:56:04,535 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 948 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:56:04,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1035 Valid, 1192 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-16 03:56:04,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2021-12-16 03:56:04,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 2467. [2021-12-16 03:56:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2467 states, 1824 states have (on average 1.3097587719298245) internal successors, (2389), 1855 states have internal predecessors, (2389), 478 states have call successors, (478), 165 states have call predecessors, (478), 164 states have return successors, (488), 470 states have call predecessors, (488), 474 states have call successors, (488) [2021-12-16 03:56:04,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 3355 transitions. [2021-12-16 03:56:04,611 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 3355 transitions. Word has length 39 [2021-12-16 03:56:04,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:56:04,611 INFO L470 AbstractCegarLoop]: Abstraction has 2467 states and 3355 transitions. [2021-12-16 03:56:04,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 03:56:04,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 3355 transitions. [2021-12-16 03:56:04,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-16 03:56:04,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:56:04,614 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:56:04,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 03:56:04,614 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:56:04,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:56:04,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1122775351, now seen corresponding path program 1 times [2021-12-16 03:56:04,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:56:04,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968834740] [2021-12-16 03:56:04,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:56:04,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:56:04,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:04,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:56:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:04,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 03:56:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:04,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:56:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 03:56:04,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:56:04,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968834740] [2021-12-16 03:56:04,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968834740] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:56:04,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:56:04,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 03:56:04,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398787799] [2021-12-16 03:56:04,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:56:04,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:56:04,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:56:04,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:56:04,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:56:04,771 INFO L87 Difference]: Start difference. First operand 2467 states and 3355 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 03:56:06,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:56:06,447 INFO L93 Difference]: Finished difference Result 2681 states and 3734 transitions. [2021-12-16 03:56:06,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 03:56:06,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-12-16 03:56:06,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:56:06,458 INFO L225 Difference]: With dead ends: 2681 [2021-12-16 03:56:06,459 INFO L226 Difference]: Without dead ends: 2678 [2021-12-16 03:56:06,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:56:06,462 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 943 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-16 03:56:06,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1031 Valid, 1191 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-16 03:56:06,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2021-12-16 03:56:06,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 2466. [2021-12-16 03:56:06,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2466 states, 1824 states have (on average 1.3092105263157894) internal successors, (2388), 1854 states have internal predecessors, (2388), 477 states have call successors, (477), 165 states have call predecessors, (477), 164 states have return successors, (488), 470 states have call predecessors, (488), 474 states have call successors, (488) [2021-12-16 03:56:06,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 3353 transitions. [2021-12-16 03:56:06,533 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 3353 transitions. Word has length 40 [2021-12-16 03:56:06,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:56:06,534 INFO L470 AbstractCegarLoop]: Abstraction has 2466 states and 3353 transitions. [2021-12-16 03:56:06,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 03:56:06,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 3353 transitions. [2021-12-16 03:56:06,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 03:56:06,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:56:06,536 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:56:06,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 03:56:06,536 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:56:06,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:56:06,537 INFO L85 PathProgramCache]: Analyzing trace with hash -446623488, now seen corresponding path program 1 times [2021-12-16 03:56:06,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:56:06,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095041565] [2021-12-16 03:56:06,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:56:06,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:56:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:06,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:56:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:06,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 03:56:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:06,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:56:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 03:56:06,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:56:06,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095041565] [2021-12-16 03:56:06,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095041565] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:56:06,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:56:06,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 03:56:06,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960627293] [2021-12-16 03:56:06,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:56:06,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:56:06,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:56:06,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:56:06,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:56:06,654 INFO L87 Difference]: Start difference. First operand 2466 states and 3353 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 03:56:08,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:56:08,678 INFO L93 Difference]: Finished difference Result 2680 states and 3732 transitions. [2021-12-16 03:56:08,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 03:56:08,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2021-12-16 03:56:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:56:08,690 INFO L225 Difference]: With dead ends: 2680 [2021-12-16 03:56:08,690 INFO L226 Difference]: Without dead ends: 2677 [2021-12-16 03:56:08,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:56:08,692 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 941 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-16 03:56:08,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1028 Valid, 1188 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-16 03:56:08,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-12-16 03:56:08,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2465. [2021-12-16 03:56:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2465 states, 1824 states have (on average 1.3086622807017543) internal successors, (2387), 1853 states have internal predecessors, (2387), 476 states have call successors, (476), 165 states have call predecessors, (476), 164 states have return successors, (488), 470 states have call predecessors, (488), 474 states have call successors, (488) [2021-12-16 03:56:08,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3351 transitions. [2021-12-16 03:56:08,759 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3351 transitions. Word has length 41 [2021-12-16 03:56:08,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:56:08,759 INFO L470 AbstractCegarLoop]: Abstraction has 2465 states and 3351 transitions. [2021-12-16 03:56:08,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 03:56:08,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3351 transitions. [2021-12-16 03:56:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-16 03:56:08,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:56:08,760 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:56:08,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 03:56:08,761 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:56:08,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:56:08,761 INFO L85 PathProgramCache]: Analyzing trace with hash -960747348, now seen corresponding path program 1 times [2021-12-16 03:56:08,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:56:08,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746317192] [2021-12-16 03:56:08,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:56:08,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:56:08,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:08,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:56:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:08,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 03:56:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:08,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:56:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 03:56:08,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:56:08,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746317192] [2021-12-16 03:56:08,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746317192] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:56:08,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:56:08,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 03:56:08,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310384646] [2021-12-16 03:56:08,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:56:08,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:56:08,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:56:08,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:56:08,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:56:08,858 INFO L87 Difference]: Start difference. First operand 2465 states and 3351 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 03:56:10,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:56:10,577 INFO L93 Difference]: Finished difference Result 2679 states and 3730 transitions. [2021-12-16 03:56:10,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 03:56:10,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2021-12-16 03:56:10,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:56:10,587 INFO L225 Difference]: With dead ends: 2679 [2021-12-16 03:56:10,587 INFO L226 Difference]: Without dead ends: 2667 [2021-12-16 03:56:10,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:56:10,589 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 938 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-16 03:56:10,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1026 Valid, 1185 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-16 03:56:10,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2021-12-16 03:56:10,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2455. [2021-12-16 03:56:10,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2455 states, 1815 states have (on average 1.3079889807162535) internal successors, (2374), 1843 states have internal predecessors, (2374), 475 states have call successors, (475), 165 states have call predecessors, (475), 164 states have return successors, (488), 470 states have call predecessors, (488), 474 states have call successors, (488) [2021-12-16 03:56:10,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2455 states to 2455 states and 3337 transitions. [2021-12-16 03:56:10,654 INFO L78 Accepts]: Start accepts. Automaton has 2455 states and 3337 transitions. Word has length 42 [2021-12-16 03:56:10,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:56:10,654 INFO L470 AbstractCegarLoop]: Abstraction has 2455 states and 3337 transitions. [2021-12-16 03:56:10,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 03:56:10,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2455 states and 3337 transitions. [2021-12-16 03:56:10,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-16 03:56:10,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:56:10,657 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:56:10,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 03:56:10,657 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:56:10,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:56:10,658 INFO L85 PathProgramCache]: Analyzing trace with hash -64547374, now seen corresponding path program 1 times [2021-12-16 03:56:10,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:56:10,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442268010] [2021-12-16 03:56:10,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:56:10,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:56:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:10,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:56:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:10,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 03:56:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:10,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:56:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:10,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 03:56:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:10,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:56:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:10,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:56:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:10,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 03:56:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 03:56:10,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:56:10,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442268010] [2021-12-16 03:56:10,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442268010] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:56:10,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:56:10,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:56:10,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391463022] [2021-12-16 03:56:10,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:56:10,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:56:10,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:56:10,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:56:10,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:56:10,780 INFO L87 Difference]: Start difference. First operand 2455 states and 3337 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 03:56:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:56:12,852 INFO L93 Difference]: Finished difference Result 6012 states and 8211 transitions. [2021-12-16 03:56:12,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:56:12,853 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 82 [2021-12-16 03:56:12,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:56:12,867 INFO L225 Difference]: With dead ends: 6012 [2021-12-16 03:56:12,868 INFO L226 Difference]: Without dead ends: 3564 [2021-12-16 03:56:12,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:56:12,875 INFO L933 BasicCegarLoop]: 919 mSDtfsCounter, 920 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 600 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 952 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 600 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-16 03:56:12,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [952 Valid, 2019 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [600 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-16 03:56:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-12-16 03:56:12,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 3248. [2021-12-16 03:56:12,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 2412 states have (on average 1.291044776119403) internal successors, (3114), 2448 states have internal predecessors, (3114), 598 states have call successors, (598), 232 states have call predecessors, (598), 237 states have return successors, (629), 595 states have call predecessors, (629), 597 states have call successors, (629) [2021-12-16 03:56:12,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 4341 transitions. [2021-12-16 03:56:12,984 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 4341 transitions. Word has length 82 [2021-12-16 03:56:12,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:56:12,985 INFO L470 AbstractCegarLoop]: Abstraction has 3248 states and 4341 transitions. [2021-12-16 03:56:12,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 03:56:12,985 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 4341 transitions. [2021-12-16 03:56:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-16 03:56:12,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:56:12,988 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:56:12,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 03:56:12,989 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:56:12,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:56:12,989 INFO L85 PathProgramCache]: Analyzing trace with hash 66281665, now seen corresponding path program 1 times [2021-12-16 03:56:12,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:56:12,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377139003] [2021-12-16 03:56:12,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:56:12,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:56:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:13,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:56:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:13,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 03:56:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:13,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:56:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:13,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:56:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:13,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 03:56:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:13,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-16 03:56:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:13,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:56:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:13,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:56:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:13,125 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-16 03:56:13,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:56:13,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377139003] [2021-12-16 03:56:13,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377139003] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:56:13,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:56:13,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:56:13,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278852766] [2021-12-16 03:56:13,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:56:13,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:56:13,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:56:13,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:56:13,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:56:13,128 INFO L87 Difference]: Start difference. First operand 3248 states and 4341 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 03:56:19,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:56:19,250 INFO L93 Difference]: Finished difference Result 7644 states and 10313 transitions. [2021-12-16 03:56:19,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:56:19,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 98 [2021-12-16 03:56:19,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:56:19,267 INFO L225 Difference]: With dead ends: 7644 [2021-12-16 03:56:19,267 INFO L226 Difference]: Without dead ends: 4410 [2021-12-16 03:56:19,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:56:19,277 INFO L933 BasicCegarLoop]: 1049 mSDtfsCounter, 619 mSDsluCounter, 1962 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 3011 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-16 03:56:19,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 3011 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-12-16 03:56:19,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4410 states. [2021-12-16 03:56:19,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4410 to 4058. [2021-12-16 03:56:19,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4058 states, 3036 states have (on average 1.2832674571805007) internal successors, (3896), 3076 states have internal predecessors, (3896), 718 states have call successors, (718), 298 states have call predecessors, (718), 303 states have return successors, (749), 715 states have call predecessors, (749), 717 states have call successors, (749) [2021-12-16 03:56:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4058 states to 4058 states and 5363 transitions. [2021-12-16 03:56:19,431 INFO L78 Accepts]: Start accepts. Automaton has 4058 states and 5363 transitions. Word has length 98 [2021-12-16 03:56:19,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:56:19,431 INFO L470 AbstractCegarLoop]: Abstraction has 4058 states and 5363 transitions. [2021-12-16 03:56:19,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 03:56:19,432 INFO L276 IsEmpty]: Start isEmpty. Operand 4058 states and 5363 transitions. [2021-12-16 03:56:19,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-16 03:56:19,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:56:19,439 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2021-12-16 03:56:19,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 03:56:19,439 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:56:19,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:56:19,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1944227263, now seen corresponding path program 1 times [2021-12-16 03:56:19,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:56:19,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582374327] [2021-12-16 03:56:19,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:56:19,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:56:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:19,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:56:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:19,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 03:56:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:19,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:56:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:19,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:56:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:19,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 03:56:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:19,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 03:56:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:19,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:56:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:19,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:56:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-16 03:56:19,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:56:19,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582374327] [2021-12-16 03:56:19,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582374327] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:56:19,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941497177] [2021-12-16 03:56:19,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:56:19,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:56:19,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:56:19,598 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) [2021-12-16 03:56:19,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 03:56:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:19,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 03:56:19,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:56:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-16 03:56:20,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:56:20,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941497177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:56:20,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:56:20,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 03:56:20,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504651498] [2021-12-16 03:56:20,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:56:20,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 03:56:20,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:56:20,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 03:56:20,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:56:20,135 INFO L87 Difference]: Start difference. First operand 4058 states and 5363 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 03:56:20,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:56:20,428 INFO L93 Difference]: Finished difference Result 9784 states and 12886 transitions. [2021-12-16 03:56:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 03:56:20,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 110 [2021-12-16 03:56:20,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:56:20,446 INFO L225 Difference]: With dead ends: 9784 [2021-12-16 03:56:20,446 INFO L226 Difference]: Without dead ends: 5740 [2021-12-16 03:56:20,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:56:20,456 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 676 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:56:20,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 1662 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:56:20,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5740 states. [2021-12-16 03:56:20,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5740 to 5732. [2021-12-16 03:56:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5732 states, 4316 states have (on average 1.2919369786839667) internal successors, (5576), 4380 states have internal predecessors, (5576), 952 states have call successors, (952), 452 states have call predecessors, (952), 463 states have return successors, (997), 947 states have call predecessors, (997), 951 states have call successors, (997) [2021-12-16 03:56:20,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5732 states to 5732 states and 7525 transitions. [2021-12-16 03:56:20,609 INFO L78 Accepts]: Start accepts. Automaton has 5732 states and 7525 transitions. Word has length 110 [2021-12-16 03:56:20,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:56:20,610 INFO L470 AbstractCegarLoop]: Abstraction has 5732 states and 7525 transitions. [2021-12-16 03:56:20,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 03:56:20,611 INFO L276 IsEmpty]: Start isEmpty. Operand 5732 states and 7525 transitions. [2021-12-16 03:56:20,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-16 03:56:20,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:56:20,615 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:56:20,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 03:56:20,823 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 [2021-12-16 03:56:20,823 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:56:20,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:56:20,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1582638069, now seen corresponding path program 1 times [2021-12-16 03:56:20,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:56:20,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644600058] [2021-12-16 03:56:20,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:56:20,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:56:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:20,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:56:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:20,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 03:56:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:20,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:56:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:20,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:56:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:20,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-16 03:56:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:20,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 03:56:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:21,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 03:56:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:21,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:56:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:21,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:56:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:21,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-16 03:56:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 03:56:21,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:56:21,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644600058] [2021-12-16 03:56:21,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644600058] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:56:21,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128484507] [2021-12-16 03:56:21,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:56:21,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:56:21,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:56:21,084 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) [2021-12-16 03:56:21,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 03:56:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:21,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1384 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 03:56:21,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:56:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 03:56:21,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:56:21,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128484507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:56:21,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:56:21,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2021-12-16 03:56:21,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360781716] [2021-12-16 03:56:21,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:56:21,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:56:21,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:56:21,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:56:21,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:56:21,713 INFO L87 Difference]: Start difference. First operand 5732 states and 7525 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 03:56:22,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:56:22,393 INFO L93 Difference]: Finished difference Result 17170 states and 22542 transitions. [2021-12-16 03:56:22,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 03:56:22,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 121 [2021-12-16 03:56:22,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:56:22,462 INFO L225 Difference]: With dead ends: 17170 [2021-12-16 03:56:22,462 INFO L226 Difference]: Without dead ends: 17162 [2021-12-16 03:56:22,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:56:22,471 INFO L933 BasicCegarLoop]: 1263 mSDtfsCounter, 1624 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1624 SdHoareTripleChecker+Valid, 3065 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 03:56:22,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1624 Valid, 3065 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 03:56:22,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17162 states. [2021-12-16 03:56:22,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17162 to 17132. [2021-12-16 03:56:22,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17132 states, 12896 states have (on average 1.2926488833746899) internal successors, (16670), 13104 states have internal predecessors, (16670), 2848 states have call successors, (2848), 1352 states have call predecessors, (2848), 1387 states have return successors, (2985), 2819 states have call predecessors, (2985), 2847 states have call successors, (2985) [2021-12-16 03:56:23,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17132 states to 17132 states and 22503 transitions. [2021-12-16 03:56:23,020 INFO L78 Accepts]: Start accepts. Automaton has 17132 states and 22503 transitions. Word has length 121 [2021-12-16 03:56:23,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:56:23,020 INFO L470 AbstractCegarLoop]: Abstraction has 17132 states and 22503 transitions. [2021-12-16 03:56:23,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 03:56:23,020 INFO L276 IsEmpty]: Start isEmpty. Operand 17132 states and 22503 transitions. [2021-12-16 03:56:23,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-16 03:56:23,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:56:23,032 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 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] [2021-12-16 03:56:23,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 03:56:23,243 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 [2021-12-16 03:56:23,243 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:56:23,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:56:23,244 INFO L85 PathProgramCache]: Analyzing trace with hash 377135426, now seen corresponding path program 1 times [2021-12-16 03:56:23,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:56:23,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239320613] [2021-12-16 03:56:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:56:23,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:56:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:23,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:56:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:23,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 03:56:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:23,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:56:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:23,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:56:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:23,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-16 03:56:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:23,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 03:56:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:23,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 03:56:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:23,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:56:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:23,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:56:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:23,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-16 03:56:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:23,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-16 03:56:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-16 03:56:23,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:56:23,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239320613] [2021-12-16 03:56:23,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239320613] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:56:23,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005026830] [2021-12-16 03:56:23,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:56:23,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:56:23,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:56:23,420 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) [2021-12-16 03:56:23,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 03:56:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:23,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 03:56:23,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:56:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 03:56:23,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:56:23,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005026830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:56:23,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:56:23,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-16 03:56:23,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82377132] [2021-12-16 03:56:23,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:56:23,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 03:56:23,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:56:23,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 03:56:23,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:56:23,999 INFO L87 Difference]: Start difference. First operand 17132 states and 22503 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 03:56:24,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:56:24,499 INFO L93 Difference]: Finished difference Result 26112 states and 34294 transitions. [2021-12-16 03:56:24,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 03:56:24,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 131 [2021-12-16 03:56:24,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:56:24,524 INFO L225 Difference]: With dead ends: 26112 [2021-12-16 03:56:24,525 INFO L226 Difference]: Without dead ends: 8446 [2021-12-16 03:56:24,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:56:24,559 INFO L933 BasicCegarLoop]: 1024 mSDtfsCounter, 753 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:56:24,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1277 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:56:24,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8446 states. [2021-12-16 03:56:24,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8446 to 8446. [2021-12-16 03:56:24,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8446 states, 6351 states have (on average 1.2890883325460558) internal successors, (8187), 6455 states have internal predecessors, (8187), 1408 states have call successors, (1408), 669 states have call predecessors, (1408), 686 states have return successors, (1476), 1393 states have call predecessors, (1476), 1407 states have call successors, (1476) [2021-12-16 03:56:24,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8446 states to 8446 states and 11071 transitions. [2021-12-16 03:56:24,827 INFO L78 Accepts]: Start accepts. Automaton has 8446 states and 11071 transitions. Word has length 131 [2021-12-16 03:56:24,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:56:24,827 INFO L470 AbstractCegarLoop]: Abstraction has 8446 states and 11071 transitions. [2021-12-16 03:56:24,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 03:56:24,828 INFO L276 IsEmpty]: Start isEmpty. Operand 8446 states and 11071 transitions. [2021-12-16 03:56:24,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-16 03:56:24,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:56:24,837 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:56:24,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 03:56:25,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:56:25,042 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:56:25,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:56:25,042 INFO L85 PathProgramCache]: Analyzing trace with hash 2142892748, now seen corresponding path program 1 times [2021-12-16 03:56:25,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:56:25,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244224470] [2021-12-16 03:56:25,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:56:25,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:56:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:25,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:56:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:25,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 03:56:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:25,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:56:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:25,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:56:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:25,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-16 03:56:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:25,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 03:56:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:25,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 03:56:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:25,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:56:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:25,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:56:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:25,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-16 03:56:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-16 03:56:25,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:56:25,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244224470] [2021-12-16 03:56:25,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244224470] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:56:25,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62912314] [2021-12-16 03:56:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:56:25,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:56:25,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:56:25,176 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) [2021-12-16 03:56:25,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 03:56:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:25,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 1421 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 03:56:25,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:56:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-16 03:56:25,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:56:25,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62912314] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:56:25,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:56:25,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 03:56:25,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108909994] [2021-12-16 03:56:25,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:56:25,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 03:56:25,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:56:25,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 03:56:25,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:56:25,810 INFO L87 Difference]: Start difference. First operand 8446 states and 11071 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-16 03:56:26,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:56:26,165 INFO L93 Difference]: Finished difference Result 16256 states and 21353 transitions. [2021-12-16 03:56:26,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 03:56:26,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 133 [2021-12-16 03:56:26,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:56:26,186 INFO L225 Difference]: With dead ends: 16256 [2021-12-16 03:56:26,186 INFO L226 Difference]: Without dead ends: 8454 [2021-12-16 03:56:26,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:56:26,202 INFO L933 BasicCegarLoop]: 1312 mSDtfsCounter, 675 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 1984 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:56:26,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [675 Valid, 1984 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:56:26,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8454 states. [2021-12-16 03:56:26,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8454 to 8446. [2021-12-16 03:56:26,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8446 states, 6351 states have (on average 1.285781766650921) internal successors, (8166), 6455 states have internal predecessors, (8166), 1408 states have call successors, (1408), 669 states have call predecessors, (1408), 686 states have return successors, (1476), 1393 states have call predecessors, (1476), 1407 states have call successors, (1476) [2021-12-16 03:56:26,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8446 states to 8446 states and 11050 transitions. [2021-12-16 03:56:26,448 INFO L78 Accepts]: Start accepts. Automaton has 8446 states and 11050 transitions. Word has length 133 [2021-12-16 03:56:26,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:56:26,448 INFO L470 AbstractCegarLoop]: Abstraction has 8446 states and 11050 transitions. [2021-12-16 03:56:26,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-16 03:56:26,448 INFO L276 IsEmpty]: Start isEmpty. Operand 8446 states and 11050 transitions. [2021-12-16 03:56:26,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-16 03:56:26,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:56:26,456 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:56:26,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 03:56:26,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:56:26,675 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:56:26,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:56:26,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2090034934, now seen corresponding path program 1 times [2021-12-16 03:56:26,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:56:26,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090933591] [2021-12-16 03:56:26,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:56:26,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:56:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:26,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:56:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:26,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 03:56:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:26,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:56:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:26,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:56:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:26,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-16 03:56:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:26,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 03:56:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:26,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 03:56:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:26,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:56:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:26,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:56:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:26,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-16 03:56:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:26,878 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-16 03:56:26,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:56:26,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090933591] [2021-12-16 03:56:26,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090933591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:56:26,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:56:26,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:56:26,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304213456] [2021-12-16 03:56:26,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:56:26,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:56:26,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:56:26,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:56:26,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:56:26,879 INFO L87 Difference]: Start difference. First operand 8446 states and 11050 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 03:56:30,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:56:30,384 INFO L93 Difference]: Finished difference Result 17162 states and 22795 transitions. [2021-12-16 03:56:30,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:56:30,385 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 133 [2021-12-16 03:56:30,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:56:30,404 INFO L225 Difference]: With dead ends: 17162 [2021-12-16 03:56:30,405 INFO L226 Difference]: Without dead ends: 9360 [2021-12-16 03:56:30,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-12-16 03:56:30,415 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 385 mSDsluCounter, 2593 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 3398 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:56:30,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 3398 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1225 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-16 03:56:30,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9360 states. [2021-12-16 03:56:30,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9360 to 8488. [2021-12-16 03:56:30,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8488 states, 6381 states have (on average 1.2844381758345087) internal successors, (8196), 6485 states have internal predecessors, (8196), 1414 states have call successors, (1414), 669 states have call predecessors, (1414), 692 states have return successors, (1524), 1405 states have call predecessors, (1524), 1413 states have call successors, (1524) [2021-12-16 03:56:30,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8488 states to 8488 states and 11134 transitions. [2021-12-16 03:56:30,644 INFO L78 Accepts]: Start accepts. Automaton has 8488 states and 11134 transitions. Word has length 133 [2021-12-16 03:56:30,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:56:30,644 INFO L470 AbstractCegarLoop]: Abstraction has 8488 states and 11134 transitions. [2021-12-16 03:56:30,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 03:56:30,645 INFO L276 IsEmpty]: Start isEmpty. Operand 8488 states and 11134 transitions. [2021-12-16 03:56:30,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-16 03:56:30,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:56:30,652 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:56:30,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 03:56:30,653 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:56:30,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:56:30,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1621366100, now seen corresponding path program 1 times [2021-12-16 03:56:30,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:56:30,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312024498] [2021-12-16 03:56:30,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:56:30,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:56:30,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:30,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:56:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:30,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 03:56:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:30,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:56:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:30,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:56:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:30,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-16 03:56:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:30,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 03:56:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:30,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 03:56:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:31,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:56:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:31,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:56:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:31,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 03:56:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:31,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-16 03:56:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:31,128 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-16 03:56:31,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:56:31,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312024498] [2021-12-16 03:56:31,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312024498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:56:31,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:56:31,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:56:31,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777619463] [2021-12-16 03:56:31,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:56:31,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:56:31,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:56:31,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:56:31,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:56:31,131 INFO L87 Difference]: Start difference. First operand 8488 states and 11134 transitions. Second operand has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 9 states have internal predecessors, (97), 4 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-16 03:56:38,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:56:38,627 INFO L93 Difference]: Finished difference Result 22307 states and 30620 transitions. [2021-12-16 03:56:38,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-16 03:56:38,627 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 9 states have internal predecessors, (97), 4 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) Word has length 139 [2021-12-16 03:56:38,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:56:38,666 INFO L225 Difference]: With dead ends: 22307 [2021-12-16 03:56:38,666 INFO L226 Difference]: Without dead ends: 14463 [2021-12-16 03:56:38,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 03:56:38,681 INFO L933 BasicCegarLoop]: 1502 mSDtfsCounter, 3300 mSDsluCounter, 11229 mSDsCounter, 0 mSdLazyCounter, 5763 mSolverCounterSat, 1313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 12731 SdHoareTripleChecker+Invalid, 7076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1313 IncrementalHoareTripleChecker+Valid, 5763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-12-16 03:56:38,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3453 Valid, 12731 Invalid, 7076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1313 Valid, 5763 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2021-12-16 03:56:38,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14463 states. [2021-12-16 03:56:39,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14463 to 8488. [2021-12-16 03:56:39,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8488 states, 6381 states have (on average 1.2839680300893277) internal successors, (8193), 6485 states have internal predecessors, (8193), 1414 states have call successors, (1414), 669 states have call predecessors, (1414), 692 states have return successors, (1524), 1405 states have call predecessors, (1524), 1413 states have call successors, (1524) [2021-12-16 03:56:39,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8488 states to 8488 states and 11131 transitions. [2021-12-16 03:56:39,131 INFO L78 Accepts]: Start accepts. Automaton has 8488 states and 11131 transitions. Word has length 139 [2021-12-16 03:56:39,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:56:39,133 INFO L470 AbstractCegarLoop]: Abstraction has 8488 states and 11131 transitions. [2021-12-16 03:56:39,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 9 states have internal predecessors, (97), 4 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-16 03:56:39,134 INFO L276 IsEmpty]: Start isEmpty. Operand 8488 states and 11131 transitions. [2021-12-16 03:56:39,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-16 03:56:39,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:56:39,144 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:56:39,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 03:56:39,144 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:56:39,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:56:39,145 INFO L85 PathProgramCache]: Analyzing trace with hash -929099763, now seen corresponding path program 1 times [2021-12-16 03:56:39,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:56:39,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554375731] [2021-12-16 03:56:39,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:56:39,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:56:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:39,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:56:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:39,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 03:56:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:39,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 03:56:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:39,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:56:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:39,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 03:56:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:39,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 03:56:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:39,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-16 03:56:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:39,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-16 03:56:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:39,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-16 03:56:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:39,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:56:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:39,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:56:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:39,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 03:56:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:39,277 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-16 03:56:39,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:56:39,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554375731] [2021-12-16 03:56:39,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554375731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:56:39,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:56:39,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:56:39,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848596860] [2021-12-16 03:56:39,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:56:39,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:56:39,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:56:39,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:56:39,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:56:39,279 INFO L87 Difference]: Start difference. First operand 8488 states and 11131 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-16 03:56:42,155 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 03:56:46,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:56:46,748 INFO L93 Difference]: Finished difference Result 27144 states and 37696 transitions. [2021-12-16 03:56:46,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 03:56:46,748 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 152 [2021-12-16 03:56:46,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:56:46,798 INFO L225 Difference]: With dead ends: 27144 [2021-12-16 03:56:46,798 INFO L226 Difference]: Without dead ends: 18659 [2021-12-16 03:56:46,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:56:46,814 INFO L933 BasicCegarLoop]: 1104 mSDtfsCounter, 2512 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 1530 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2628 SdHoareTripleChecker+Valid, 2814 SdHoareTripleChecker+Invalid, 3470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1530 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-12-16 03:56:46,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2628 Valid, 2814 Invalid, 3470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1530 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2021-12-16 03:56:46,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18659 states. [2021-12-16 03:56:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18659 to 13998. [2021-12-16 03:56:47,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13998 states, 10517 states have (on average 1.2945706950651326) internal successors, (13615), 10705 states have internal predecessors, (13615), 2308 states have call successors, (2308), 1125 states have call predecessors, (2308), 1172 states have return successors, (2493), 2299 states have call predecessors, (2493), 2307 states have call successors, (2493) [2021-12-16 03:56:47,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13998 states to 13998 states and 18416 transitions. [2021-12-16 03:56:47,484 INFO L78 Accepts]: Start accepts. Automaton has 13998 states and 18416 transitions. Word has length 152 [2021-12-16 03:56:47,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:56:47,484 INFO L470 AbstractCegarLoop]: Abstraction has 13998 states and 18416 transitions. [2021-12-16 03:56:47,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-16 03:56:47,485 INFO L276 IsEmpty]: Start isEmpty. Operand 13998 states and 18416 transitions. [2021-12-16 03:56:47,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-16 03:56:47,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:56:47,506 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:56:47,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 03:56:47,507 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:56:47,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:56:47,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1936874969, now seen corresponding path program 2 times [2021-12-16 03:56:47,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:56:47,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778394900] [2021-12-16 03:56:47,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:56:47,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:56:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:47,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:56:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:47,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 03:56:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:47,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:56:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:47,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:56:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:47,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 03:56:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:47,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:56:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:47,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-16 03:56:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:47,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-16 03:56:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:47,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-16 03:56:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:47,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:56:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:47,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:56:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:47,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 03:56:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:56:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-16 03:56:47,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:56:47,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778394900] [2021-12-16 03:56:47,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778394900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:56:47,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:56:47,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:56:47,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885466152] [2021-12-16 03:56:47,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:56:47,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:56:47,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:56:47,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:56:47,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:56:47,671 INFO L87 Difference]: Start difference. First operand 13998 states and 18416 transitions. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12)