./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--renesas--sh_eth.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--renesas--sh_eth.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 5ba89c3eceb6ce3b33f7045e58fd9531469c7ed109a8240b2f15aad930b1478d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 14:39:05,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 14:39:05,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 14:39:05,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 14:39:05,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 14:39:05,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 14:39:05,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 14:39:05,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 14:39:05,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 14:39:05,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 14:39:05,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 14:39:05,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 14:39:05,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 14:39:05,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 14:39:05,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 14:39:05,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 14:39:05,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 14:39:05,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 14:39:05,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 14:39:05,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 14:39:05,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 14:39:05,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 14:39:05,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 14:39:05,437 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 14:39:05,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 14:39:05,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 14:39:05,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 14:39:05,441 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 14:39:05,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 14:39:05,442 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 14:39:05,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 14:39:05,443 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 14:39:05,444 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 14:39:05,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 14:39:05,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 14:39:05,446 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 14:39:05,447 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 14:39:05,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 14:39:05,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 14:39:05,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 14:39:05,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 14:39:05,449 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 14:39:05,467 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 14:39:05,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 14:39:05,467 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 14:39:05,468 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 14:39:05,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 14:39:05,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 14:39:05,469 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 14:39:05,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 14:39:05,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 14:39:05,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 14:39:05,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 14:39:05,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 14:39:05,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 14:39:05,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 14:39:05,470 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 14:39:05,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 14:39:05,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 14:39:05,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 14:39:05,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 14:39:05,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:39:05,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 14:39:05,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 14:39:05,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 14:39:05,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 14:39:05,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 14:39:05,472 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 14:39:05,472 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 14:39:05,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 14:39:05,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 14:39:05,473 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ba89c3eceb6ce3b33f7045e58fd9531469c7ed109a8240b2f15aad930b1478d [2021-11-06 14:39:05,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 14:39:05,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 14:39:05,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 14:39:05,647 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 14:39:05,651 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 14:39:05,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--renesas--sh_eth.ko-entry_point.cil.out.i [2021-11-06 14:39:05,707 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dea64239/8eaef50b4cc742b2b67afe8b141ef759/FLAG08c990853 [2021-11-06 14:39:06,364 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 14:39:06,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--renesas--sh_eth.ko-entry_point.cil.out.i [2021-11-06 14:39:06,412 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dea64239/8eaef50b4cc742b2b67afe8b141ef759/FLAG08c990853 [2021-11-06 14:39:06,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dea64239/8eaef50b4cc742b2b67afe8b141ef759 [2021-11-06 14:39:06,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 14:39:06,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 14:39:06,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 14:39:06,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 14:39:06,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 14:39:06,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:39:06" (1/1) ... [2021-11-06 14:39:06,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cfe5e1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:39:06, skipping insertion in model container [2021-11-06 14:39:06,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:39:06" (1/1) ... [2021-11-06 14:39:06,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 14:39:06,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 14:39:07,636 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--renesas--sh_eth.ko-entry_point.cil.out.i[170192,170205] [2021-11-06 14:39:08,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:39:08,560 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 14:39:08,671 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--renesas--sh_eth.ko-entry_point.cil.out.i[170192,170205] [2021-11-06 14:39:08,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:39:09,001 INFO L208 MainTranslator]: Completed translation [2021-11-06 14:39:09,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:39:09 WrapperNode [2021-11-06 14:39:09,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 14:39:09,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 14:39:09,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 14:39:09,004 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 14:39:09,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:39:09" (1/1) ... [2021-11-06 14:39:09,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:39:09" (1/1) ... [2021-11-06 14:39:09,772 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 14:39:09,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 14:39:09,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 14:39:09,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 14:39:09,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:39:09" (1/1) ... [2021-11-06 14:39:09,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:39:09" (1/1) ... [2021-11-06 14:39:10,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:39:09" (1/1) ... [2021-11-06 14:39:10,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:39:09" (1/1) ... [2021-11-06 14:39:10,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:39:09" (1/1) ... [2021-11-06 14:39:10,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:39:09" (1/1) ... [2021-11-06 14:39:10,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:39:09" (1/1) ... [2021-11-06 14:39:10,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 14:39:10,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 14:39:10,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 14:39:10,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 14:39:10,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:39:09" (1/1) ... [2021-11-06 14:39:10,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:39:10,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:39:10,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-06 14:39:10,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-06 14:39:10,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 14:39:10,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 14:39:10,944 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-06 14:39:10,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 14:39:10,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 14:39:10,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2021-11-06 14:39:10,945 INFO L130 BoogieDeclarations]: Found specification of procedure sh_eth_tx_timeout [2021-11-06 14:39:10,945 INFO L138 BoogieDeclarations]: Found implementation of procedure sh_eth_tx_timeout [2021-11-06 14:39:10,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 14:39:10,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 14:39:10,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 14:39:10,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 14:39:10,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 14:39:10,946 INFO L130 BoogieDeclarations]: Found specification of procedure sh_eth_dev_init [2021-11-06 14:39:10,946 INFO L138 BoogieDeclarations]: Found implementation of procedure sh_eth_dev_init [2021-11-06 14:39:10,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 14:39:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure sh_eth_adjust_link [2021-11-06 14:39:10,947 INFO L138 BoogieDeclarations]: Found implementation of procedure sh_eth_adjust_link [2021-11-06 14:39:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u16 [2021-11-06 14:39:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 14:39:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 14:39:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-06 14:39:10,948 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-06 14:39:10,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-06 14:39:10,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 14:39:10,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 14:39:10,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 14:40:12,529 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 14:40:12,529 INFO L299 CfgBuilder]: Removed 6872 assume(true) statements. [2021-11-06 14:40:12,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:40:12 BoogieIcfgContainer [2021-11-06 14:40:12,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 14:40:12,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 14:40:12,538 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 14:40:12,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 14:40:12,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:39:06" (1/3) ... [2021-11-06 14:40:12,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dfe6bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:40:12, skipping insertion in model container [2021-11-06 14:40:12,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:39:09" (2/3) ... [2021-11-06 14:40:12,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dfe6bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:40:12, skipping insertion in model container [2021-11-06 14:40:12,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:40:12" (3/3) ... [2021-11-06 14:40:12,544 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--renesas--sh_eth.ko-entry_point.cil.out.i [2021-11-06 14:40:12,548 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 14:40:12,548 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-06 14:40:12,600 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 14:40:12,605 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-06 14:40:12,605 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-06 14:40:12,674 INFO L276 IsEmpty]: Start isEmpty. Operand has 5535 states, 5508 states have (on average 1.3169934640522876) internal successors, (7254), 5511 states have internal predecessors, (7254), 21 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-06 14:40:12,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-06 14:40:12,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:12,691 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:40:12,692 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:12,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:12,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2021068076, now seen corresponding path program 1 times [2021-11-06 14:40:12,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:12,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311530361] [2021-11-06 14:40:12,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:12,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:40:13,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:13,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311530361] [2021-11-06 14:40:13,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311530361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:13,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:13,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:40:13,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801327022] [2021-11-06 14:40:13,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:40:13,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:13,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:40:13,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:40:13,338 INFO L87 Difference]: Start difference. First operand has 5535 states, 5508 states have (on average 1.3169934640522876) internal successors, (7254), 5511 states have internal predecessors, (7254), 21 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:40:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:15,919 INFO L93 Difference]: Finished difference Result 16284 states and 21510 transitions. [2021-11-06 14:40:15,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:40:15,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-06 14:40:15,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:15,980 INFO L225 Difference]: With dead ends: 16284 [2021-11-06 14:40:15,981 INFO L226 Difference]: Without dead ends: 10658 [2021-11-06 14:40:16,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:40:16,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10658 states. [2021-11-06 14:40:16,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10658 to 10658. [2021-11-06 14:40:16,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10658 states, 10607 states have (on average 1.2864146318468936) internal successors, (13645), 10611 states have internal predecessors, (13645), 42 states have call successors, (42), 8 states have call predecessors, (42), 8 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-06 14:40:16,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10658 states to 10658 states and 13729 transitions. [2021-11-06 14:40:16,328 INFO L78 Accepts]: Start accepts. Automaton has 10658 states and 13729 transitions. Word has length 40 [2021-11-06 14:40:16,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:16,328 INFO L470 AbstractCegarLoop]: Abstraction has 10658 states and 13729 transitions. [2021-11-06 14:40:16,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:40:16,329 INFO L276 IsEmpty]: Start isEmpty. Operand 10658 states and 13729 transitions. [2021-11-06 14:40:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-06 14:40:16,335 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:16,336 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:40:16,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 14:40:16,336 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:16,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:16,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1447356308, now seen corresponding path program 1 times [2021-11-06 14:40:16,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:16,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66284945] [2021-11-06 14:40:16,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:16,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:40:16,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:16,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66284945] [2021-11-06 14:40:16,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66284945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:16,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:16,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:40:16,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717183579] [2021-11-06 14:40:16,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:40:16,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:16,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:40:16,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:40:16,664 INFO L87 Difference]: Start difference. First operand 10658 states and 13729 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:40:17,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:17,457 INFO L93 Difference]: Finished difference Result 31796 states and 41072 transitions. [2021-11-06 14:40:17,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:40:17,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-06 14:40:17,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:17,567 INFO L225 Difference]: With dead ends: 31796 [2021-11-06 14:40:17,568 INFO L226 Difference]: Without dead ends: 21221 [2021-11-06 14:40:17,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:40:17,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21221 states. [2021-11-06 14:40:17,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21221 to 21109. [2021-11-06 14:40:18,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21109 states, 21008 states have (on average 1.2871287128712872) internal successors, (27040), 21016 states have internal predecessors, (27040), 84 states have call successors, (84), 16 states have call predecessors, (84), 16 states have return successors, (126), 80 states have call predecessors, (126), 84 states have call successors, (126) [2021-11-06 14:40:18,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21109 states to 21109 states and 27250 transitions. [2021-11-06 14:40:18,099 INFO L78 Accepts]: Start accepts. Automaton has 21109 states and 27250 transitions. Word has length 47 [2021-11-06 14:40:18,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:18,099 INFO L470 AbstractCegarLoop]: Abstraction has 21109 states and 27250 transitions. [2021-11-06 14:40:18,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:40:18,100 INFO L276 IsEmpty]: Start isEmpty. Operand 21109 states and 27250 transitions. [2021-11-06 14:40:18,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-06 14:40:18,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:18,128 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:40:18,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 14:40:18,133 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:18,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:18,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1167649304, now seen corresponding path program 1 times [2021-11-06 14:40:18,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:18,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63653716] [2021-11-06 14:40:18,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:18,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:18,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-06 14:40:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:18,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-06 14:40:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:40:18,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:18,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63653716] [2021-11-06 14:40:18,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63653716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:18,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:18,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:40:18,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896410810] [2021-11-06 14:40:18,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:40:18,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:18,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:40:18,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:40:18,484 INFO L87 Difference]: Start difference. First operand 21109 states and 27250 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-06 14:40:25,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:25,353 INFO L93 Difference]: Finished difference Result 56447 states and 73120 transitions. [2021-11-06 14:40:25,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:40:25,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 136 [2021-11-06 14:40:25,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:25,471 INFO L225 Difference]: With dead ends: 56447 [2021-11-06 14:40:25,471 INFO L226 Difference]: Without dead ends: 35426 [2021-11-06 14:40:25,537 INFO L786 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 [2021-11-06 14:40:25,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35426 states. [2021-11-06 14:40:26,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35426 to 35143. [2021-11-06 14:40:26,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35143 states, 34946 states have (on average 1.2917930521375838) internal successors, (45143), 34974 states have internal predecessors, (45143), 152 states have call successors, (152), 32 states have call predecessors, (152), 44 states have return successors, (282), 148 states have call predecessors, (282), 152 states have call successors, (282) [2021-11-06 14:40:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35143 states to 35143 states and 45577 transitions. [2021-11-06 14:40:26,285 INFO L78 Accepts]: Start accepts. Automaton has 35143 states and 45577 transitions. Word has length 136 [2021-11-06 14:40:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:26,287 INFO L470 AbstractCegarLoop]: Abstraction has 35143 states and 45577 transitions. [2021-11-06 14:40:26,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-06 14:40:26,287 INFO L276 IsEmpty]: Start isEmpty. Operand 35143 states and 45577 transitions. [2021-11-06 14:40:26,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-06 14:40:26,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:26,310 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:40:26,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 14:40:26,310 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:26,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:26,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1313962223, now seen corresponding path program 1 times [2021-11-06 14:40:26,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:26,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889648387] [2021-11-06 14:40:26,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:26,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:26,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-06 14:40:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:26,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-06 14:40:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:40:26,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:26,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889648387] [2021-11-06 14:40:26,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889648387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:26,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:26,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:40:26,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493666075] [2021-11-06 14:40:26,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:40:26,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:26,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:40:26,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:40:26,606 INFO L87 Difference]: Start difference. First operand 35143 states and 45577 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-06 14:40:33,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:33,250 INFO L93 Difference]: Finished difference Result 65446 states and 84913 transitions. [2021-11-06 14:40:33,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:40:33,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 135 [2021-11-06 14:40:33,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:33,354 INFO L225 Difference]: With dead ends: 65446 [2021-11-06 14:40:33,355 INFO L226 Difference]: Without dead ends: 30391 [2021-11-06 14:40:33,436 INFO L786 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 [2021-11-06 14:40:33,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30391 states. [2021-11-06 14:40:34,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30391 to 30143. [2021-11-06 14:40:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30143 states, 29978 states have (on average 1.2918473547267997) internal successors, (38727), 30006 states have internal predecessors, (38727), 120 states have call successors, (120), 32 states have call predecessors, (120), 44 states have return successors, (230), 116 states have call predecessors, (230), 120 states have call successors, (230) [2021-11-06 14:40:34,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30143 states to 30143 states and 39077 transitions. [2021-11-06 14:40:34,438 INFO L78 Accepts]: Start accepts. Automaton has 30143 states and 39077 transitions. Word has length 135 [2021-11-06 14:40:34,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:34,439 INFO L470 AbstractCegarLoop]: Abstraction has 30143 states and 39077 transitions. [2021-11-06 14:40:34,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-06 14:40:34,439 INFO L276 IsEmpty]: Start isEmpty. Operand 30143 states and 39077 transitions. [2021-11-06 14:40:34,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-06 14:40:34,455 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:34,455 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:40:34,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 14:40:34,456 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:34,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:34,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1915740303, now seen corresponding path program 1 times [2021-11-06 14:40:34,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:34,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622752707] [2021-11-06 14:40:34,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:34,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:40:34,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:34,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622752707] [2021-11-06 14:40:34,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622752707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:34,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:34,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:40:34,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68393727] [2021-11-06 14:40:34,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:40:34,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:34,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:40:34,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:40:34,777 INFO L87 Difference]: Start difference. First operand 30143 states and 39077 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:40:35,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:35,650 INFO L93 Difference]: Finished difference Result 87125 states and 112723 transitions. [2021-11-06 14:40:35,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:40:35,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-06 14:40:35,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:35,861 INFO L225 Difference]: With dead ends: 87125 [2021-11-06 14:40:35,861 INFO L226 Difference]: Without dead ends: 57070 [2021-11-06 14:40:35,955 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:40:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57070 states. [2021-11-06 14:40:37,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57070 to 56623. [2021-11-06 14:40:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56623 states, 56310 states have (on average 1.289202628307583) internal successors, (72595), 56366 states have internal predecessors, (72595), 224 states have call successors, (224), 64 states have call predecessors, (224), 88 states have return successors, (428), 216 states have call predecessors, (428), 224 states have call successors, (428) [2021-11-06 14:40:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56623 states to 56623 states and 73247 transitions. [2021-11-06 14:40:37,664 INFO L78 Accepts]: Start accepts. Automaton has 56623 states and 73247 transitions. Word has length 118 [2021-11-06 14:40:37,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:37,666 INFO L470 AbstractCegarLoop]: Abstraction has 56623 states and 73247 transitions. [2021-11-06 14:40:37,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:40:37,666 INFO L276 IsEmpty]: Start isEmpty. Operand 56623 states and 73247 transitions. [2021-11-06 14:40:37,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-06 14:40:37,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:37,691 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:40:37,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 14:40:37,691 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:37,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:37,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1475299326, now seen corresponding path program 1 times [2021-11-06 14:40:37,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:37,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388546323] [2021-11-06 14:40:37,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:37,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:37,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-06 14:40:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:37,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-06 14:40:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:37,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-06 14:40:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:37,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:40:37,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:37,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388546323] [2021-11-06 14:40:37,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388546323] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:37,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:37,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:40:37,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522281534] [2021-11-06 14:40:37,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:40:37,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:37,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:40:37,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:40:37,982 INFO L87 Difference]: Start difference. First operand 56623 states and 73247 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-06 14:40:47,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:47,856 INFO L93 Difference]: Finished difference Result 170293 states and 220885 transitions. [2021-11-06 14:40:47,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:40:47,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 122 [2021-11-06 14:40:47,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:48,419 INFO L225 Difference]: With dead ends: 170293 [2021-11-06 14:40:48,419 INFO L226 Difference]: Without dead ends: 113758 [2021-11-06 14:40:48,548 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:40:48,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113758 states. [2021-11-06 14:40:51,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113758 to 111959. [2021-11-06 14:40:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111959 states, 111398 states have (on average 1.289457620424065) internal successors, (143643), 111510 states have internal predecessors, (143643), 384 states have call successors, (384), 128 states have call predecessors, (384), 176 states have return successors, (728), 368 states have call predecessors, (728), 384 states have call successors, (728) [2021-11-06 14:40:51,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111959 states to 111959 states and 144755 transitions. [2021-11-06 14:40:51,620 INFO L78 Accepts]: Start accepts. Automaton has 111959 states and 144755 transitions. Word has length 122 [2021-11-06 14:40:51,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:51,620 INFO L470 AbstractCegarLoop]: Abstraction has 111959 states and 144755 transitions. [2021-11-06 14:40:51,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-06 14:40:51,621 INFO L276 IsEmpty]: Start isEmpty. Operand 111959 states and 144755 transitions. [2021-11-06 14:40:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-06 14:40:51,687 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:51,687 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:40:51,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 14:40:51,687 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:51,688 INFO L85 PathProgramCache]: Analyzing trace with hash -441464138, now seen corresponding path program 1 times [2021-11-06 14:40:51,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:51,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931042739] [2021-11-06 14:40:51,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:51,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-06 14:40:51,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:51,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931042739] [2021-11-06 14:40:51,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931042739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:51,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:51,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:40:51,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519672997] [2021-11-06 14:40:51,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:40:51,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:51,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:40:51,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:40:51,899 INFO L87 Difference]: Start difference. First operand 111959 states and 144755 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:40:54,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:54,606 INFO L93 Difference]: Finished difference Result 223846 states and 289443 transitions. [2021-11-06 14:40:54,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:40:54,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-06 14:40:54,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:55,233 INFO L225 Difference]: With dead ends: 223846 [2021-11-06 14:40:55,233 INFO L226 Difference]: Without dead ends: 111975 [2021-11-06 14:40:55,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:40:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111975 states. [2021-11-06 14:40:57,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111975 to 111975. [2021-11-06 14:40:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111975 states, 111414 states have (on average 1.289416051842677) internal successors, (143659), 111526 states have internal predecessors, (143659), 384 states have call successors, (384), 128 states have call predecessors, (384), 176 states have return successors, (728), 368 states have call predecessors, (728), 384 states have call successors, (728) [2021-11-06 14:40:58,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111975 states to 111975 states and 144771 transitions. [2021-11-06 14:40:58,070 INFO L78 Accepts]: Start accepts. Automaton has 111975 states and 144771 transitions. Word has length 168 [2021-11-06 14:40:58,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:58,071 INFO L470 AbstractCegarLoop]: Abstraction has 111975 states and 144771 transitions. [2021-11-06 14:40:58,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:40:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 111975 states and 144771 transitions. [2021-11-06 14:40:58,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-06 14:40:58,114 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:58,115 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:40:58,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 14:40:58,115 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:58,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:58,116 INFO L85 PathProgramCache]: Analyzing trace with hash -239640204, now seen corresponding path program 1 times [2021-11-06 14:40:58,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:58,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761418717] [2021-11-06 14:40:58,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:58,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:58,536 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-06 14:40:58,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:58,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761418717] [2021-11-06 14:40:58,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761418717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:58,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:58,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:40:58,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070635956] [2021-11-06 14:40:58,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:40:58,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:58,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:40:58,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:40:58,540 INFO L87 Difference]: Start difference. First operand 111975 states and 144771 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:41:01,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:41:01,197 INFO L93 Difference]: Finished difference Result 223878 states and 289475 transitions. [2021-11-06 14:41:01,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:41:01,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-06 14:41:01,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:41:01,637 INFO L225 Difference]: With dead ends: 223878 [2021-11-06 14:41:01,638 INFO L226 Difference]: Without dead ends: 111991 [2021-11-06 14:41:01,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:41:01,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111991 states. [2021-11-06 14:41:04,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111991 to 111991. [2021-11-06 14:41:04,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111991 states, 111430 states have (on average 1.2893744951987796) internal successors, (143675), 111542 states have internal predecessors, (143675), 384 states have call successors, (384), 128 states have call predecessors, (384), 176 states have return successors, (728), 368 states have call predecessors, (728), 384 states have call successors, (728) [2021-11-06 14:41:04,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111991 states to 111991 states and 144787 transitions. [2021-11-06 14:41:04,796 INFO L78 Accepts]: Start accepts. Automaton has 111991 states and 144787 transitions. Word has length 168 [2021-11-06 14:41:04,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:41:04,797 INFO L470 AbstractCegarLoop]: Abstraction has 111991 states and 144787 transitions. [2021-11-06 14:41:04,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:41:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 111991 states and 144787 transitions. [2021-11-06 14:41:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-06 14:41:04,835 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:41:04,835 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:41:04,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 14:41:04,836 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:41:04,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:41:04,836 INFO L85 PathProgramCache]: Analyzing trace with hash 194088882, now seen corresponding path program 1 times [2021-11-06 14:41:04,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:41:04,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947275322] [2021-11-06 14:41:04,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:41:04,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:41:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:41:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-06 14:41:05,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:41:05,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947275322] [2021-11-06 14:41:05,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947275322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:41:05,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:41:05,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:41:05,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703154508] [2021-11-06 14:41:05,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:41:05,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:41:05,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:41:05,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:41:05,023 INFO L87 Difference]: Start difference. First operand 111991 states and 144787 transitions. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)